International Journal of Current Research and Review
ISSN: 2231-2196 (Print)ISSN: 0975-5241 (Online)
logo
slider
slider
slider
slider
Bootstrap Slider

Indexed and Abstracted in: Crossref, CAS Abstracts, Publons, Google Scholar, Open J-Gate, ROAD, Indian Citation Index (ICI), ResearchGATE, Ulrich's Periodicals Directory, WorldCat (World's largest network of library content and services)

Search Articles

Track manuscript

Full Html

IJCRR - 4(22), November, 2012

Pages: 12-28

Date of Publication: 24-Nov-2012


Print Article   Download XML  Download PDF

ELECTRON SPIN RESONANCE, NUCLEAR QUADRUPOLE RESONANCE, REFLECTANCE AND MAGNETIC PARAMETERS OF COBALT (II) AND NICKEL (II) COMPLEXES USING DENSITY FUNCTIONAL THEORY

Author: Harminder Singh, A.K. Bhardwaj, M.L. Sehgal, Susheel K. Mittal

Category: General Sciences

Abstract:Density Functional Theory was used to calculate and correlate 14 ESR, NQR, Reflectance and Magnetic parameters of 20 Co+2 and Ni+2 complexes such as [CoX4]2- (X = F, Cl , Br ,I), [Co(OH2)4]2+, [Co(NCO)4]2-, [CoX6]4- (X = F, Cl), [NiX4]2- (X = Cl ,Br, I, NCO), [NiX6]4- (X=F, Cl ,Br, I) [Ni(H2O)6]2+, [Ni(NH3)6]2+, [Ni(CH3NH2)6]2+, [Ni(NH3)4(NCS)2]. All computations were carried out in the gas phase using ADF2010.02 by applying Single Point, LDA, Default , Spin Orbit, Unrestricted, None, Collinear commands using DZ or TPZ basis sets. The complexes were optimized to obtain two ESR (g11, g22, g33, giso, a11, a22, a33, Aten) and three NQR parameters [?, q11, q22, q33, NQCC]. Two Reflectance parameters [?complex, % covalent character] were calculated from giso. In addition, five magnetic [?soc, ?t, ?net, t2g electron delocalization and its constant k] and two more ESR [H^, ΔE hf] parameters were calculated by combining the ESR and Reflectance data. We verified the Laplace equation using the NQR data. The delocalization parameter (k) and the reflectance parameter called Nephelauxetic ratio (?35) were found to have almost the same values as both determine the covalence in complexes. The calculated values of parameters were found in agreement with their reported values.

Keywords: DFT, ESR, NQR, Reflectance, Magnetism, Nephelauxetic ratio, delocalization parameter

Full Text:

INTRODUCTION
Effective Spin Hamiltonian (H^) is a mathematical expression that determines energy of an ESR transitions when an ESR active metal ion is surrounded by ligands in a definite geometry. It depends upon a number of ESR parameters [anisotropic and isotropic splitting factors (g11,g 22, g33, g iso), hyperfine coupling constants( a11,a22 ,a33 ,Aten)], NQR parameters [electric field gradient or efg (q11,q22,q33), Nuclear Quadrupole Coupling Constant(Q)]* , total electronic spin (S), Bohr Magneton of both the electron (?e) and the nucleus (?n), nuclear spin * Q or e Q is the nuclear quadrupole moment. q Or e q is the electric field gradient and product of these quantities (e Q× e q= e2Qq) is nuclear quadrupole coupling constant (Q). quantum number (I), gn (nuclear magnetic ratio) and nature of surrounding nuclei having quadrupole moments(I?1). No doubt, ESR studies on some biologically important(1-2) Co+2 and catalytically(3) suitable Ni+2 complexes has already been reported, yet a correlation of their ESR, NQR, Reflectance and Magnetic parameters with the help of a software is rarely found in the literature. With certain commands, the software gave five ESR and NQR parameters. They were together used to calculate two more ESR parameters [effective spin Hamiltonian (H^) and hyperfine coupling energy (?Ehf)]. The giso parameter was further correlated to two Reflectance parameters [spin orbit coupling constant (?complex), % covalent character]. The ESR and the Reflectance parameters were together used to calculate and correlate five magnetic parameters [magnetic moments namely total (?t), net (?net) and that containing contributions from spin and orbital (?soc or ?ADF), t2g electron delocalization and its constant (k)]. The software also gave dipole moments and symmetry symbols of complexes. We could also verify Laplace equation for the complexes. The following points necessitated the present study to be taken up with the help of software: i) There had hardly been any attempt made to theoretically calculate and correlate ESR, NQR, Reflectance and Magnetic parameters of complexes of transition metal ions. ii) With ESR transitions falling in low energy microwave region (X band: 9000-10000 MHz), the experiments required cumbersome cryoscopic† conditions. 14 ESR, NQR, Reflectance and Magnetic parameters were correlated in 20 Co2+ and Ni2+ complexes of coordination numbers 4 and 6 by using ADF (Amsterdam Density Functional) 2010.02 software by applying of D.F.T. (Density Functional Theory) (7-9). The 5 parameters given by the software (g, a, q, NQCC,?) were used to calculate 9 other parameters [H^, ?Ehf, ?complex, % covalent character, ?t , ?net, ?soc , t2g electron delocalization and its constant (k)]. 23 relations were selectively used to calculate these parameters of complexes like [CoX4] 2- (X = F, Cl, Br, I), [Co(OH2)4] 2+, [Co(NCO)4] 2- , [CoX6] 4- (X = F, Cl), [NiX4] 2- (X = Cl , Br, I, NCO), [NiX6] 4- (X = F, Cl, Br, I) [Ni(H2O)6] 2+ , [Ni(NH3)6] 2+, [Ni(CH3NH2)6] 2+ , [Ni(NH3)4(NCS)2]. These complexes possessed both regular (Td, Oh) as well as distorted stereochemistries (C1,C2, D?h,D4h, D6h ,D2d ).

(1) Calculation of ESR parameters (10-25)
(a) Effective Spin Hamiltonian (H^):
Four factors which contributed to H^ (MHz) were: g, a, Q and interaction of nuclear magnetic moment with external magnetic field (I). Three relations were used to calculate H^ having contributions from these four factors:

 

[1] Was used for systems with different values of g and a. [2] Was used for axially symmetric systems while [3] was used when g and/or a parameters had the same or nearly the same values. The first and the last terms in these relations were in ergs and the other two were in MHz (6.627 ? 10-21 erg = one MHz; ?e=1.3994 MHz/Gauss; ? n= ?e/1836. gn had a specific value for each metal).

 

Here, ?soc was the magnetic moment given by spin orbit coupling. The (?t) was total magnetic moment while ?tip ‡ and ?tip were Zeeman Second Order molar magnetic susceptibility and Zeeman Second Order magnetic moment respectively. ?t was the total molar magnetic susceptibility and (k) was t2g electron delocalization constant. Molar 

 

magnetic susceptibilities (?Mol s.o) of Ni2+ and Co2+ with 2 and 3 unpaired electrons respectively were 3333.33 Χ10-6 and 6250.0?10-6 cgs/mol. ?metal ion and ? complex were the spin-orbit coupling constants of the free metal ion and of the same metal ion present in the complex respectively. Free ?Co 2+ and free ? Ni 2+ had values -172.0 and -316.0 cm-1 respectively. Total value of g called gt and similar term geff were calculated by [16

 

METHODOLOGY
After optimization of the complexes(42-43) by ADF 2010.02, the SW was run by applying Single Point, LDA* , Default, Spin Orbit, Unrestricted, None and Collinear commands by using DZ* or TPZ* Basis sets in all the Co2+ complexes and octahedral Ni2+ complexes. In Ni+2

tetrahedral complexes, LDA was replaced by GGABP*. All the complexes have Nysom* symmetry.

Complexes of Cobalt (II)
Co2+, with three unpaired electrons and a quartet ground state, should show both the Zero Field Splitting (D) and Jahn-Teller effect. But in the four coordinate complexes like [CoX4]2± (X= H2O, F, Cl, Br, I, CNS), an almost tetrahedral symmetry was enforced. Also, the two high spin six coordinate complexes [CoX6] 4- (X= Cl, F) possessed an axial and nearly an axial symmetry respectively. Moreover, this software did not take an account of Zero Field Splitting. So, both these effects were neglected. Only a few relevant papers on Reflectance and Magnetic (44-57) and ESR studies (58-62) of Co2+ complexes were reported. Theoretically calculated parameters obtained from the results of the software agreed well with their experimental values (53-54) .

RESULTS
Each OUTPUT file of a complex gave values of two ESR (g11, g22, g33 and g iso, product of g n and a11,a22,a33,Aten)and three NQR(?, q11,q22,q33,NQCC) parameters along with its optimization parameters [geometry, dipole moment, bonding energy and total energy(Xc)].

Xc was made up from LDA and GGA components; each being further made up of Exchange and Correlation parts]. The bonding energy was computed as an energy difference between molecule and fragments. When the fragments were single atoms, they were usually computed as Spherically Symmetric and SpinRestricted. This, usually, did not represent the true atomic ground state (42-43) . Tables: 1. 1 and1.1 A give the optimization parameters of cobalt metal and all the Co2+ complexes. Tables: 1.2 -1.3 give values of all the five ESR and NQR parameters, verification of Laplace equation and (?) for four and six coordinate Co2+ complexes respectively. Table: 1 .2 A and 1.3A give g iso , A ten and Q values along with contributions from their respective factors. They also give contribution from the fourth factor called interaction of nuclear magnetic moment with external magnetic field factor (I) into H^ along with ?Eh f (≈ 0.5 A ten) values for both the four and six coordinate Co2+ complexes respectively. Tables: 1.4, 1.4 A and 1.5 contain magnetic parameters of four and six coordinate Co2+ complexes as calculated by applying the results from ESR and Reflectance techniques.

DISCUSSION
The necessity, the originality, the relevance, the objective of present work and how it moved the body of scientific knowledge forward had already been explained in our previous communication. We could successfully calculate/correlate 14 parameters of the four techniques in 36 Ti2+,3+ , V +2,3+,4+ and Cr3+ complexes(63) . The discussion was divided into two parts: [l] Calculation of ESR and NQR parameters (a) Effective Spin Hamiltonian (H^) (i) The four complexes [CoX4] 2- (X=F, Cl, Br, I) were of Td symmetry while both [Co (OH2)4] 2+ and [Co(NCO)4] 2- complexes possessed C1 symmetry. But in both these types of complexes, the software gave nearly the same values of g. Also, none of them would obey the conditions of axial symmetry. So, for all these six complexes, the H^ was calculated by [3]. (ii) [CoF6] 4- and [CoCl6] 4- with point groups D?h and D6h respectively had axial symmetry with (a) Two of the three g called g ? had the same values and third of higher value was called g?? (b) Two a parameters called a? were of the same value and third of higher value was named a11. (c) Two of the three q parameters were of the same value (d) ?=0. Relation [2] was used to calculate H^.[S_x=S_y=S_z=3/2; I_x=I_y=I_z=3.5 and g n= 1.3220000]. Individual contributions from four factors in the total value of H^ for the eight Co 2+ complexes are given in small brackets of horizontal row shown at the bottom (?) in Tables: 1.2A and 1.3A. (b) Relation [7] was used for the verification of Laplace Equation (Table: 1.2-1.3) while parameters such as ? and ? E hf (Tables: 1.2 A1. 3A) were calculated by [5, 4] respectively.

[2] Calculation of Reflectance and Magnetic parameters from ESR parameters
(a
) ADF and t parameters: The discussion was divided into two parts:
(i) Four Coordinate Complexes: Table:

1.4 gave values of magnetic moments due to spin orbit coupling (?ADF) as calculated from giso values by applying [8].This moment arose from an intermixing of ground 4A2 term of Co2+ with its immediately higher in energy 4T2 term which made 4A2 to acquire some T character. Contribution of magnetic moment from Second Order Zeeman Effect (?t.i.p) was calculated by [9 and10]. The former gave ?t.i p. while the latter gave ?t i p. Finally, the sum of ?ADF and ?tip resulted in ?t which was calculated by [11].

 

(ii) Six Coordinate Complexes: Table:1.5 contained ?t values of two high spin six coordinate Co2+ complexes as calculated by a different relation [11c] because the ground term in octahedral Co+2 complexes was 4T1g while its tetrahedral complexes had 4A2 ground state. (b) Calculations of t 2g electron delocalization, its constant (k), ?complex, % covalent character, ?net and gt

(i) Four Coordinate Complexes: [Table: 1.4A] First we calculated total molar magnetic susceptibility (?t) by applying [12].Then (k) was calculated by [13].The term 8 N ? 2/10Dq, called the Second Order molar magnetic susceptibility, i.e. ?t.i.p had already been calculated by [9] (Table: 1.4). Knowing (k), we could calculate ?complex by [14]. It gave the weight by which ?Co 2+ (-172.0 cm-1 ) was reduced to give ?complex on the formation of Co2+ complexes. This decrease was due to delocalization of electron cloud which had brought about covalence in metal-ligand bonds (64). The % covalent character was calculated by [15].The gt values of complexes were calculated by [16] .They were found in agreement with geff . The geff values, in turn, were calculated from 10Dq values of complexes given by reflectance spectra by [17]. Similarly, t2g electron delocalization was calculated either indirectly from gt values [18] or from geff [18a] . The values obtained from both these methods would almost agree. Lastly, ?net was calculated by [11a]. It was noticed that (k) did not agree well with Nephelauxetic Ratio (?35) in tetrahedral Co2+ complexes. On the contrary, the ?complex as calculated by [14] as well as its value obtained from reflectance spectral method agreed well with each other (53-54). This difference in (k) and (?35) values was due to the fact that in tetrahedral Co2+ complexes, the lowest energy band (?1) , being so low in energy would not fall in u v.- vis. region (?300-1000 nm). In such cases, (?35) was calculated from the ratio of ?2 and ?3 bands. Both these bands had vibration character i.e. were quite broad and errors occurred in locating the exact positions of their ?max values.

(ii) Six Coordinate Complexes:
With negligible t2g electron delocalization, parameters like gt , ?complex , (k) and the % covalent character could not be calculated.

Table: 1.1. Energies (kJmole-1 ) of Co Sum of orbital energies = -78854.221 Total energy = - 134234.270 Kinetic energy = 136350.812 Nuclear attraction energy = - 346177.790 Electron repulsion energy = 57226.702 Exchange energy = - 5539.960 For Co nucleus I =3.5 and gn = 1.322000

Complexes of Nickel (II)
[A] Octahedral Complexes of Nickel (II)

Ni 2+ is a non-Kramer ion. With S=1, it had m j =0, ?1, ----- j ?1 states. Their degeneracy was completely removed even by the crystal field. So they gave only the singlet levels. There were only a few cases where ESR spectra of Ni2+ octahedral complexes could be observed at room temperature(4-6) because its ground state m j =0 was separated from the first excited state (m j =1) by an energy more than the energy of microwave region. No doubt, the detailed studies were reported on Reflectance and Magnetic data of Ni2+ complexes (66-83), yet a further study was needed to know as to how the results thus obtained could be correlated with their ESR parameters.

RESULTS
Tables: 2.1 and 2.1A give optimization parameters of nickel metal and the Ni+2 complexes. Table: 2.2 gives values of the five ESR and NQR parameters, verification of Laplace equation and another parameter (?) for the six coordinate Ni2+ complexes. Table: 2 .2 A gives g iso, Aten and Q values and contributions from their respective factors. It also gives contribution from the fourth factor called interaction of nuclear magnetic moment with external magnetic field factor (I) into H^ as well as ?Ehf (≈0.5 Aten) values.Tables:2.3-2.3A contain magnetic parameters of the six coordinate Ni2+ complexes as calculated by applying the results from ESR and reflectance techniques.

DISCUSSION
The discussion was divided into two parts: [l] Calculation of ESR and NQR parameters (a) Effective Spin Hamiltonian: All the eight Ni+2 complexes had nearly the same values of g parameters. Also, none of them obeyed all the conditions of axial symmetry. So relation [3] was applied to calculate H^ values for all. [Put S_x=S_y=S_z=1; I_x=I_y=I_z=1.5 and g n = - 0.5000133]. The individual contributions from four factors in the total value of H^ were given in small brackets of horizontal row shown at the bottom (?) of each complex [Table: 2.2A]. (b) Relation [7] was used for the verification of Laplace Equation (Table: 2.2) and parameters such as ? and ? Ehf (Tables: 2.2- 2. 2A) were calculated by [5, 4] respectively.

[2] Calculation of Reflectance and Magnetic parameters from ESR parameters
(a)Calculation of ?ADF and ?t: Table: 2.3 gave values of magnetic moments due to spin-orbit coupling (?soc or ?ADF) as calculated from giso by [8].These values were generally more than their respective ?so. values. This was due to intermixing of ground 3A2g term of Ni2+ with its immediately higher in energy 3T2g term of same multiplicity. This made its 3A2g term to acquire some T character. The contribution from Second Order Zeeman Effect (?tip) was calculated by [9and10]. The former gave ?t.i.p. and latter gave ?t i.p. Sum of ?ADF and ?tip was equal to the total magnetic moment (?t) [11]. As expected, the net magnetic moments (?net) of these complexes were somewhat more than their respective (?so) values. (b)Calculation of t2g electron delocalization constant (k), ?complex and % covalent character (Table: 2.3A): Total molar magnetic susceptibility (?t) and its constant (k) were calculated by [12, 13] respectively. The term 8 N ? 2/10 Dq representing the Second Order molar magnetic susceptibility (?t. i. p) had already been calculated [Table: 2.3]. ?complex was calculated by [14]. It gave the weight by which ? Ni 2+ [-316.0 cm-1 ] was reduced in Ni2+ complexes. This reduction was due to the delocalization of electron cloud which had brought about covalence (64) in metal-ligand bonds by intermixing of electron clouds of Ni2+ t2g orbitals with ligand orbitals as both the metal ion and ligand orbitals were of suitable symmetry and comparable energies. The % covalent character was calculated by [15]. The calculated (k) values agreed well with Nephelauxetic Ratios (?35) of Ni2+ complexes wherever reported in literature or were theoretically calculated from three reflectance spectral bands of the complexes (66, 83) . (c)Calculation of total value of g called gt , t2g electron delocalization and ?net (Table: 2.3 A): Total value of g called gt was calculated by [16] while the total magnetic moment (?t) was calculated by [11] .Theoretical gt values were well in agreement with geff values as calculated by [17] from 10Dq values obtained from reflectance data. Same was the case of t2g electron delocalization values. Whether they were calculated from gt by [18] or were calculated from g eff by [18a], their values were found to be in agreement. The ? net was calculated by [11a].

Tables: 2.1.Energies (kJ mole-1 ) of Ni
Sum of orbital energies = -85650.855 Total energy = -146522.795 Kinetic energy = 148997.799 Nuclear attraction energy = -352449.098 Electron repulsion energy = 62843.648 Exchange energy = -8809.705 For Ni nucleus I =1.5 and g n = -0.500133

[B] Tetrahedral Complexes of Ni (II)
The presence of an extensive spin–orbit coupling in 3T1 ground state of Ni2+ made spin relaxation times very small. So it became quite difficult to observe ESR spectra of four coordinate Ni2+ complexes (83-89). Of course, like octahedral Ni2+complexes, numerous papers were reported on Reflectance spectral and Magnetic properties of Ni2+ tetrahedral complexes.

RESULTS
Table: 2.4 gives values of all the five ESR and NQR parameters, verification of Laplace equation and the parameter (?) for four coordinate Ni2+ complexes. Table: 2 .4 A gives giso , Aten and Q values along with contributions from their respective factors .It also gives contribution from the fourth factor called interaction of nuclear magnetic moment with external magnetic field factor (I) into H^ as well as ?Eh f (≈ 0.5 Aten) values for the four coordinate Ni2+ complexes. Tables: 2.5 and 2.5A contain magnetic parameters of four coordinate Ni2+ complexes as calculated by applying the ESR and Reflectance spectral results.

DISCUSSION
[l] Calculation of ESR and NQR parameters
(a) Effective Spin Hamiltonian H^ The complexes like [NiX4] -2 (X= Cl, Br, I) belonged of Td point group while the complex (X=NCO) had a D2d symmetry. All these complexes had different values of parameters like g and a. So Relation [1] was applied to calculate their H^ (Table: 2.4 A). (b) Relation [7] was used for the verification of Laplace Equation (Table: 2.4) and parameters such as ? and ? E hf (Tables: 2.4- 2. 4A) were calculated by [5, 4] respectively. [

2] Calculation of Reflectance and Magnetic parameters from ESR parameters
(a) Calculation of ? ADF and ?t (Table: 2.5): ?ADF was calculated from giso by [8] while ?t was calculated by [11a] while the relation [11] was used to calculate the same parameter in Ni2+ octahedral complexes. It was due to the reason that Ni2+ had 3T1 ground state in its tetrahedral complexes while it had 3A2g state in the octahedral complexes.Net magnetic moments (?net) of these tetrahedral complexes, as expected, were found to be some what more than the six coordinate complexes because of spin–orbit coupling. [2(b)] Calculation of t2g electron delocalization, its delocalization constant (k), ?complex and % covalent character (Table:2.5 A):Total value of g called gt was calculated from the total magnetic moment by [16] .The average of the difference between gt and giso with a negative sign gave t2g electron delocalization parameter [18a]. It was, then, related to another parameter called t2g electron delocalization constant (k) by [13a]. Again, the relations [18a] and [13a] used here were different from those of [18] and [13] relations as the two latter relations were used to calculate the same parameters respectively in octahedral Ni2+complexes.This, again, was because of the difference in ground states of Ni2+ in its octahedral and tetrahedral geometries. The values of (k) as calculated by [13a] and the experimentally determined Nephelauxetic Ratios (?35) of tetrahedral Ni2+ complexes (54a, 84) were given in Table ; 2.5 A** for a comparison. Lastly, the constant (k) was related to the covalent character in these complexes by [15].This covalence was brought about by intermixing of electron clouds of Ni2+ “e” orbitals with the ligand orbitals.

**If we look into the Table: 2.5 A, we find that the theoretical (k) values differ slightly from the experimental (?35) values. It is, again, due to the fact that like Co2+ tetrahedral complexes, the lowest energy band (?1) in the tetrahedral Ni2+ complexes is also low lying in energy. So it does not fall in u v. - vis. region. The (?35) parameter in such cases is calculated from the ratio of ?2 and ?3 bands. As both these bands have vibration character ,i.e. are quite broad and errors occur, invariably, in locating the exact positions of their ?max values.

CONCLUSIONS
With certain commands, the ADF software gave five ESR and NQR parameters. These parameters were used to calculate nine other ESR, NQR, Reflectance and Magnetic parameters by the selective use of 23 relations. So these14 parameters of the four techniques were correlated in the 20 Co+2 and Ni+2 complexes without the help of any diagnostic instruments. Theoretically calculated values of these parameters were found to be fairly in agreement with their experimental values reported in the literature. The authors had already proved this fact in 36 Ti2+,3+ , V 2+,3+,4+ and Cr3+ complexes in the previous communication and hope to prove the same in forty five more complexes of 2nd and 3rd transition series metal ions in the forthcoming communication.

ACKNOWLEDGEMENTS
Authors acknowledge the immense help received from the scholars whose articles are cited and included in references of this manuscript. The authors are also grateful to authors/ editors/ publishers of all those articles, journals and books from where the literature for this article has been reviewed and discussed. They are indebted to Mr. S.R. Heer , Chief Engineer (Retd.), North Zone, Doordarshan, New Delhi (India), for his invaluable cooperation in the installation and smooth working of the ADF software.

References:

1. Comelis, M., Vos.Gerrit Wester and Dick Schipper, Inorg. Biochemistry, 13(1980)165- 77.

2. Masaru Tada and Ryoichi Shino, Inorg. Biochemistry, 44(1991)89-95.

3. Guido Busca, Umberto Costantino, Tania Montanari, Gianguido Ramis, Carlo Resini, Michele Sisani, International Journal of Hydrogen Energy, 35(2010)5356-66.

4. S.Czaniechi P.B. and Lescak J., Magn. Reson, 46(1982)185.

5. Samo W., Domiciano J.B. and Ochi J.A., Phy. Rev.,154(1994)505.

6. Kadish K.M, Sazou D, Maiya G.B, Han D.C, Sasiabi Farhat M. and Guilard R., Inorg Chem., 28(1989)2542.

7. Atanasov, M, and Daul, C.A., Comptes. Rendus, Chimie, “Modelling Magnetic and Photophysical Properties of Coordination Compounds using Density Functional Theory,’’ Special Issue: “Integrated Experimental, Spectroscopic and Theoretical Aspects in Inorganic Chemistry”, Guest Editor: Dr.C.Mealli , 8(2005)1421-33.

8. Atanasov, M., Daul, C. A. and Penka Fowe, E., Monatshefte für Chemie.,136(2005)925- 63.

9. Atanasov, M. and Daul, C.A., Chimia.,59(2005)504-10.

10. Mcgravey, B.R., “Electron Spin Resonance of Transition Metal Complexes,” in “Transition Metal Chemistry,”Vol.3, p. 89- 201(1969), R.L. Carlin, Ed. Marcel Dekker, N.Y.

11. Foner, S. and Low, W., Phys. Rev., 120(1960)1585.

12. Pedersen, E. and Toftlund, H., Inorg. Chem., 13(1974)1603.

13. Borcherts, R.H. and Kikuchi, C., J.Chem. Phys., 40(1964) 2207.

14. Kenedy, F.S. etal., Biochem.Biophys.Res Comm.,48(1972)1533.

15. Urbach ,F., J. Amer.Chem. Soc., 98(1976)5144.

16. Mcgarvey, B.R., Can. J.Chem., 53(1975)2498.

17. Malatesta, V. and Mcgravey, B.R., Can. J. Chem., 53(1975)3791.

18. Reuvani, A., Malatesta. V. and Mcgarvey, B. R., Can J.Chem.,55(1977)70 .

19. Hastey,E.,Colburn T.J. and Hendrickon, D.N., Inorg.Chem., 12(1973)2414.

20. Lewis, W.B. and Morgan, L.O., “Transition Metal Chemistry,” Vol.4, p .33(1968); R.L. Carlin, Ed.Marcel Dekker,N.Y.

21. So, H. and Belford, R.L., J.Amer.Chem Soc., 91(1969)2392.

22. Belford, R.L., Huang, D.T. and So, H., Chem. Phys. Lett.,14(1972)592.

23. Van Lanthe E., vander Aroird and Wormer, P.E.S., J.Chem.Phys., 107(1997)2488-98.

24. Van Lanthe E., vander Aroird and Wormer, P.E.S., J.Chem.Phys., 108(1998)783-96.

25. Van Lanthe E. and Baerends, J., J.Chem. Phys., 108(2000)8279- 92.

26. Silichter, C.P., “Principals of Magnetic Resonance,” Sec.6.3 (1963); Harper and Row, N.Y.

27. Bersohn, R., J. Chem. Phys., 20(1952)1505.

28. Edmonds, D.T. et al, “Advances in Quadrupole Resonance,”Vol.1, p.145(1974); Heydon, London.

29. Dean, C., Phys. Rev., 86 (1952) 607A.

30. Smith, A.S; “Advances in Nuclear Quadrupole Resonance,” Vol.1 (1974), Vol. 2 (1975), Vol.3(1977) ; Heydon and Sons, London.

31. Orgel, L. E., “An Introduction to Transition Metal Ion Chemistry, Ligand Field Theory,” 2 nd Edn. (1966) John Wiley, N.Y.

32. Orgel. L. E.,“ Transition Metal Chemistry,’’ (1966) ; Methuen, London.

33. Tanabe, Y. and Sugano, S., J.Phys.Soc.Japan, 39(1954)753, 766.

34. Figgis, B. N. and Lewis, J., “The Magnetochemistry of Complex Compounds,” in, “Modern Coordination Chemistry,” (1960); Ed. J. Lewis and R.G.Wilkins, Interscience , N.Y.

35. Figgis, B.N. and Lewis, J. ,“The Magnetic Properties of Transition Metal Complexes” in, “Progress in Inorganic Chemistry,” Vol. 6(1964); Ed. F.A.Cotton, Interscience, N.Y.

36. Figgis, B.N., Wadley, L.G.B. and Gerloch, M., J.Chem.Soc. Dalton Trans(1973)238-42.

37. Figgis, B.N.,“ Introduction to Ligand Fields,” p.265-66, 276-77(1966); U.S. Edn.

38. Ballhausen, C.J.,“Introduction to Ligand Field Theory,”(1962); McGraw-Hill, N.Y.

39. Griffiths , J.S., “Theory Of Transition Metal Ions,” (1961); Cambridge Univ. Press. 40. Cotton, F.A. et.al., J.Chem. Soc., 1873(1960).

41. Leslie K.A., Drago, R.S., Stucky, G.D., Kitko, D. J. and Breeese, J.A., Inorg. Chem.,18(1979) 1885.

42. Baerends, E. J., Branchadel, V. and Sodupe, M., Chem. Phys.Lett., 265(1997)481.

43. Lipkowitz, K. B. and Boyd, D. B., "KohnSham Density Functional Theory: Predicting and Understanding Chemistry" in Rev. Comput. Chem., p.1-86, Vol.15 (2000) Wiley-VCH, N.Y.

44. Ferguson, J., Wood, D.L and Knox, K., J. Chem. Phys., 39(1963)881.

45. PApperlardo, R., Wood, D.L and Linares, R. C., J.Chem. Phys., 35(1961)2041.

46. Lever, A.B.P., Inorg . Chem., 4(1965)1042.

47. Goodgame, M. and Cotton, F.A., J. Phys. Chem ., 65(1961)791.

48. Blake , A. B., Chem.Commun., (1966)569.

49. Goodgame, M., Goodgame, D.M.L. and Cotton, F. A., J. Amer. Chem. Soc., 83(1961)4161.

50. Cotton, F.A., Goodgame, M., Goodgame, D. M. L. and Haas,T. E., Inorg.Chem., 1(1962)565.

51. Cotton, F.A. and Dunne, T.G., J. Amer. Chem .Soc., 84(1962) 2013.

52. Bencini, A., Benelli, C., Gatteschi, D., Zanchini, C., Inorg. Chim. Acta., 40(1980)X115-X116.

53. Cotton, F.A., Goodgame, D. M.L and Goodgame, M., J.Amer.Chem. Soc., 83(1961)4690.

54. Cotton, F.A., Goodgame, D. M.L., Goodgame, M. and Sacco, A., J. Amer. Chem. Soc., 83(1961)4157. 54a. Goodgame, M., Goodgame, D. M.L. and Cotton, F.A., J. Amer.Chem. Soc., 83(1961)4161.

55. Carlin, R.L. and Walker, I.M., Chem. Commun., 139 (1965)82.

56. Reddy, Damodar, Reddy, N.S. and Chandrashekar , T.K., Inorg. Chim. Acta., 166(1989)147-49.

57. Schlafer, H.L, and Opitz, H.P., Z. Electrochem., 65(1961)372.

58. Angelov,S.,Zhecheva,E.,Stoyanova ,R.and Atanasov,M.,J.Phys.Chem.Solids, 51(1990)1157-61.

59. Angelova, O., Macicek,J., Atanasov ,M. and Petrov, G., Inorg. Chem., 30(1991)1943-49.

60. Atanasov,M., Koenig ,W., Craubner ,H. and Reinen. D., New.J.Chem., 17(1993)115-24.

61. Daul, C., Rauzy, C., Zbiri, M., Baettig ,P., Bruyndonckx, R., Baerends E.J. and Atanasov, M., Chem.Phys.Lett., 399(2004) 433-39.

62. Atanasov, M., Daul ,C.A., Rohmer M.-M. and Venkatachalam, T., Chem.Phys.Lett., 427(2006)449-54.

63. Harminder Singh, Bhardwaj, A.K., Sehgal, M.L. and Mittal, Susheel, K., 2012 (Communicated). 64. Atanasov, M., Daul, C.A. and Rauzy C., Chem. Phys. Lett., 367(2003)737-46.

65. Jorgensen, C. K.,“Absorption Spectra and Chemical Bonding in Complexes,”(1962);Paragon Press, N .Y.

66. Lever, A.B.P. “Inorganic Electronic Spectroscopy,” p. 324-336. 2nd Edn.

67. Dun T.M., McClure, D.S. and Pearson, R.G., “Some Aspects of Crystal Field Theory,” p. 82(1965) ;Harper and Row, N. Y.

68. Meak, D.W, Drago,R.S. and Piper,T.S., Inorg. Chem.,1(1962)285. 69. Hare, C.R. and Ballhausen, C.J., J. Chem.Phys., 40(1964) 788 -93.

70. J.T. Summers and J.V. Quagliano, Inorg. Chem., 3(1964) 1767.

71. Kiser, R.W. and Lapp, T.W., Inorg. Chem.,1(1962) 401.

72. Lever, A.B.P., ACS Advances in Chemistry Series No. 62(1967) 430.

73. Lever A.B.P., Advances in Electronic Spectroscopy,” p.207-11, 2nd Edn.

74. Lever, A.B.P., Nelson S.M. and Shepherd T.M., Inorg.Chem., 4(1965)810.

75. Bose, A. and Chatterjee, R., Proc. Phys. Soc., 83(1963)23.

76. Drago, R.S., Meek ,D.W,, Joestan, M.L. and Laroche, D.,.Inorg.Chem.,2(1963)124.

77. Smith, L.Holt, Jr and Carlin, R.L.,J.Amer.Chem.Soc.,6(1964)3017.

78. Drago, R.S., Meak, D.W., Longi R., Joestan M.L. and Laroch D., Inorg. Chem.,2 (1963)1056. 79. Lewis, A.B.P., Lewis, J. and Nyholm, R.S., J. Chem. Soc., (1964)1187-89.

80. Konings, A.J.A., Brentjens, W.L.J., Koningsberger, D.C., de Beer, V.H.J., Catalysis, 67(1981)145-58.

81. Imhof V. and Drago, R.S., Inorg .Chem., 4(1965)427.

82. Lever, A.B.P., J. Inorg. and Nucl. Chem., 27(1965)1491.

83. Buffagni S., Vellerino , L.M. and Quagliano, J.V.; Inorg .Chem.,3(1964)480.

84. Forster, D. and Goodgame, D.M.L.,J. Chem.Soc., (1964)2790; (1965)268. 85. Atanasov, M. and Nikolov, G. St., Inorg. Chim. Acta ., 68(1983)15-23.

86. Atanasov, M. and Nikolov, G. St., Chem.Bulg.Acad.Sci.,16(1983)329- 36.

87. Atanasov, M., PhD Thesis, Bulgarian Academy of Sciences, Sofia, Bulgaria,1983.

88. Atanasov, M. and Nikolov, G. St., J. Molec. Struct., 114(1984)65-68.

89. Atanasov M., Rauzy C., Bättig P. and Daul C., Int. J. Quantum Chem.,102(2005)119-31.

Announcements

Dr. Pramod Kumar Manjhi joined Editor-in-Chief since July 2021 onwards

COPE guidelines for Reviewers

SCOPUS indexing: 2014, 2019 to 2021


Awards, Research and Publication incentive Schemes by IJCRR

Best Article Award: 

One article from every issue is selected for the ‘Best Article Award’. Authors of selected ‘Best Article’ are rewarded with a certificate. IJCRR Editorial Board members select one ‘Best Article’ from the published issue based on originality, novelty, social usefulness of the work. The corresponding author of selected ‘Best Article Award’ is communicated and information of award is displayed on IJCRR’s website. Drop a mail to editor@ijcrr.com for more details.

Women Researcher Award:

This award is instituted to encourage women researchers to publish her work in IJCRR. Women researcher, who intends to publish her research work in IJCRR as the first author is eligible to apply for this award. Editorial Board members decide on the selection of women researchers based on the originality, novelty, and social contribution of the research work. The corresponding author of the selected manuscript is communicated and information is displayed on IJCRR’s website. Under this award selected women, the author is eligible for publication incentives. Drop a mail to editor@ijcrr.com for more details.

Emerging Researcher Award:

‘Emerging Researcher Award’ is instituted to encourage student researchers to publish their work in IJCRR. Student researchers, who intend to publish their research or review work in IJCRR as the first author are eligible to apply for this award. Editorial Board members decide on the selection of student researchers for the said award based on originality, novelty, and social applicability of the research work. Under this award selected student researcher is eligible for publication incentives. Drop a mail to editor@ijcrr.com for more details.


Best Article Award

A study by Dorothy Ebere Adimora et al. entitled \"Remediation for Effects of Domestic Violence on Psychological well-being, Depression and Suicide among Women During COVID-19 Pandemic: A Cross-cultural Study of Nigeria and Spain\" is awarded Best Article of Vol 14 issue 23
A study by Muhas C. et al. entitled \"Study on Knowledge & Awareness About Pharmacovigilance Among Pharmacists in South India\" is awarded Best article for Vol 14 issue 22
A study by Saurabh Suvidha entitled \"A Case of Mucoid Degeneration of Uterine Fibroid with Hydrosalphinx and Ovarian Cyst\" is awarded Best article of Vol 14 issue 21
A study by Alice Alice entitled \"Strengthening of Human Milk Banking across South Asian Countries: A Next Step Forward\" is awarded Best article of Vol 14 issue 20
A study by Sathyanarayanan AR et al. entitled \"The on-task Attention of Individuals with Autism Spectrum Disorder-An Eye Tracker Study Using Auticare\" is awarded Best article of Vol 14 issue 19
A study by Gupta P. et al. entitled \"A Short Review on \"A Novel Approach in Fast Dissolving Film & their Evaluation Studies\" is awarded Best Article of Vol 14 issue 18.
A study by Shafaque M. et al. entitled \"A Case-Control Study Performed in Karachi on Inflammatory Markers by Ciprofloxacin and CoAmoxicillin in Patients with Chronic Suppurative Otitis Media\" is awarded Best Article of Vol 14 issue 17
A study by Ali Nawaz et al. entitled \"A Comparative Study of Tubeless versus Standard Percutaneous Nephrolithotomy (PCNL) \? A Randomized Controlled Study\" is awarded Best Article for Vol 14 issue 16.
A study by Singh R. et al. entitled \"A Prospective Study to Find the Association of Astigmatism in Patients of Vernal Keratoconjunctivitis (VKC) in a Tertiary Health Care Centre in India (Vindhya Region MP)\" is awarded Best Article for Vol 14 issue 15
A Study by Humaira Tahir et al. entitled "Comparison of First Analgesic Demand after Major Surgeries of Obstetrics and Gynecology between Pre-Emptive Versus Intra-Operative Groups by Using Intravenous Paracetamol: A Cross-Sectional Study" is awarded Best Article for Vol 14 issue 14
A Study by Monica K. entitled "Risk Predictors for Lymphoma Development in Sjogren Syndrome - A Systematic Review" is awarded Best Article for Vol 14 issue 13
A Study by Mokhtar M Sh et al. entitled "Prevalence of Hospital Mortality of Critically Ill Elderly Patients" is awarded Best Article for Vol 14 issue 12
A Study by Vidya S. Bhat et al. entitled "Effect of an Indigenous Cleanser on the Microbial Biofilm on Acrylic Denture Base - A Pilot Study" is awarded Best Article for Vol 14 issue 11
A Study by Pandya S. et al. entitled "Acute and 28-Day Repeated Dose Subacute Toxicological Evaluation of Coroprotect Tablet in Rodents" is awarded Best Article for Vol 14 issue 10
A Study by Muhammad Zaki et al. entitled "Effect of Hemoglobin Level on the Severity of Acute Bronchiolitis in Children: A Case-Control Study" is awarded Best Article for Vol 14 issue 09
A Study by Vinita S & Ayushi S entitled "Role of Colour Doppler and Transvaginal Sonography for diagnosis of endometrial pathology in women presenting with Abnormal Uterine Bleeding" is awarded Best Article for Vol 14 issue 08
A Study by Prabhu A et al. entitled "Awareness of Common Eye Conditions among the ASHA (Accredited Social Health Activist) Workers in the Rural Communities of Udupi District- A Pilot Study" is awarded Best Article for Vol 14 issue 07
A Study by Divya MP et al. entitled "Non-Echoplanar Diffusion-Weighted Imaging and 3D Fiesta Magnetic Resonance Imaging Sequences with High Resolution Computed Tomography Temporal Bone in Assessment and Predicting the Outcome of Chronic Suppurative Otitis Media with Cholesteatoma" is awarded Best Article for Vol 14 issue 06
A Study by Zahoor Illahi Soomro et al. entitled "Functional Outcomes of Fracture Distal Radius after Fixation with Two Different Plates: A Retrospective Comparative Study" is awarded Best Article for Vol 14 issue 05
A Study by Ajai KG & Athira KN entitled "Patients’ Gratification Towards Service Delivery Among Government Hospitals with Particular Orientation Towards Primary Health Centres" is awarded Best Article for Vol 14 issue 04
A Study by Mbungu Mulaila AP et al. entitled "Ovarian Pregnancy in Kindu City, D.R. Congo - A Case Report" is awarded Best Article for Vol 14 issue 03
A Study by Maryam MJ et al. entitled "Evaluation Serum Chemerin and Visfatin Levels with Rheumatoid Arthritis: Possible Diagnostic Biomarkers" is awarded Best Article for Vol 14 issue 02
A Study by Shanthan KR et al. entitled "Comparison of Ultrasound Guided Versus Nerve Stimulator Guided Technique of Supraclavicular Brachial Plexus Block in Patients Undergoing Upper Limb Surgeries" is awarded Best Article for Vol 14 issue 01
A Study by Amol Sanap et al. entitled "The Outcome of Coxofemoral Bypass Using Cemented Bipolar Hemiarthroplasty in the Treatment of Unstable Intertrochanteric Fracture of Femur in a Rural Setup" is awarded Best Article Award of Vol 13 issue 24
A Study by Manoj KP et al. entitled "A Randomized Comparative Clinical Trial to Know the Efficacy of Ultrasound-Guided Transversus Abdominis Plane Block Against Multimodal Analgesia for Postoperative Analgesia Following Caesarean Section" is awarded Best Article Award of Vol 13 issue 23
A Study by Karimova II et al. entitled "Changes in the Activity of Intestinal Carbohydrases in Alloxan-Induced Diabetic Rats and Their Correction with Prenalon" is awarded Best Article of Vol 13 issue 22
A Study by Ashish B Roge et al. entitled "Development, Validation of RP-HPLC Method and GC MS Analysis of Desloratadine HCL and It’s Degradation Products" is awarded Best Article of Vol 13 issue 21
A Study by Isha Gaurav et al. entitled "Association of ABO Blood Group with Oral Cancer and Precancer – A Case-control Study" is awarded Best Article for Vol 13 issue 20
A Study by Amr Y. Zakaria et al. entitled "Single Nucleotide Polymorphisms of ATP-Binding Cassette Gene(ABCC3 rs4793665) affect High Dose Methotrexate-Induced Nephrotoxicity in Children with Osteosarcoma" is awarded Best Article for Vol 13 issue 19
A Study by Kholis Ernawati et al. entitled "The Utilization of Mobile-Based Information Technology in the Management of Dengue Fever in the Community Year 2019-2020: Systematic Review" is awarded Best Article for Vol 13 issue 18
A Study by Bhat Asifa et al. entitled "Efficacy of Modified Carbapenem Inactivation Method for Carbapenemase Detection and Comparative Evaluation with Polymerase Chain Reaction for the Identification of Carbapenemase Producing Klebsiella pneumonia Isolates" is awarded Best Article for Vol 13 issue 17
A Study by Gupta R. et al. entitled "A Clinical Study of Paediatric Tracheostomy: Our Experience in a Tertiary Care Hospital in North India" is awarded Best Article for Vol 13 issue 16
A Study by Chandran Anand et al. entitled "A Prospective Study on Assessment of Quality of Life of Patients Receiving Sorafenib for Hepatocellular Carcinoma" is awarded Best article for Vol 13 issue 15
A Study by Rosa PS et al. entitled "Emotional State Due to the Covid – 19 Pandemic in People Residing in a Vulnerable Area in North Lima" is awarded Best Article for Vol 13 issue 14
A Study by Suvarna Sunder J et al. entitled "Endodontic Revascularization of Necrotic Permanent Anterior Tooth with Platelet Rich Fibrin, Platelet Rich Plasma, and Blood Clot - A Comparative Study" is awarded Best Article for Vol 13 issue 13
A Study by Mona Isam Eldin Osman et al. entitled "Psychological Impact and Risk Factors of Sexual Abuse on Sudanese Children in Khartoum State" is awarded Best Article for Vol 13 issue 12
A Study by Khaw Ming Sheng & Sathiapriya Ramiah entitled "Web Based Suicide Prevention Application for Patients Suffering from Depression" is awarded Best Article for Vol 13 issue 11
A Study by Purushottam S. G. et al. entitled "Development of Fenofibrate Solid Dispersions for the Plausible Aqueous Solubility Augmentation of this BCS Class-II Drug" is awarded Best article for Vol 13 issue 10
A Study by Kumar S. et al. entitled "A Study on Clinical Spectrum, Laboratory Profile, Complications and Outcome of Pediatric Scrub Typhus Patients Admitted to an Intensive Care Unit from a Tertiary Care Hospital from Eastern India" is awarded Best Article for Vol 13 issue 09
A Study by Mardhiah Kamaruddin et al. entitled "The Pattern of Creatinine Clearance in Gestational and Chronic Hypertension Women from the Third Trimester to 12 Weeks Postpartum" is awarded Best Article for Vol 13 issue 08
A Study by Sarmila G. B. et al. entitled "Study to Compare the Efficacy of Orally Administered Melatonin and Clonidine for Attenuation of Hemodynamic Response During Laryngoscopy and Endotracheal Intubation in Gastrointestinal Surgeries" is awarded Best Article for Vol 13 issue 07
A Study by M. Muthu Uma Maheswari et al. entitled "A Study on C-reactive Protein and Liver Function Tests in Laboratory RT-PCR Positive Covid-19 Patients in a Tertiary Care Centre – A Retrospective Study" is awarded Best Article of Vol 13 issue 06 Special issue Modern approaches for diagnosis of COVID-19 and current status of awareness
A Study by Gainneos PD et al. entitled "A Comparative Evaluation of the Levels of Salivary IgA in HIV Affected Children and the Children of the General Population within the Age Group of 9 – 12 Years – A Cross-Sectional Study" is awarded Best Article of Vol 13 issue 05 Special issue on Recent Advances in Dentistry for better Oral Health
A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" is awarded Best Article of Vol 13 issue 06
A Study by Chen YY and Ghazali SRB entitled "Lifetime Trauma, posttraumatic stress disorder Symptoms and Early Adolescence Risk Factors for Poor Physical Health Outcome Among Malaysian Adolescents" is awarded Best Article of Vol 13 issue 04 Special issue on Current Updates in Plant Biology to Medicine to Healthcare Awareness in Malaysia
A Study by Kumari PM et al. entitled "Study to Evaluate the Adverse Drug Reactions in a Tertiary Care Teaching Hospital in Tamilnadu - A Cross-Sectional Study" is awarded Best Article for Vol 13 issue 05
A Study by Anu et al. entitled "Effectiveness of Cytological Scoring Systems for Evaluation of Breast Lesion Cytology with its Histopathological Correlation" is awarded Best Article of Vol 13 issue 04
A Study by Sharipov R. Kh. et al. entitled "Interaction of Correction of Lipid Peroxidation Disorders with Oxibral" is awarded Best Article of Vol 13 issue 03
A Study by Tarek Elwakil et al. entitled "Led Light Photobiomodulation Effect on Wound Healing Combined with Phenytoin in Mice Model" is awarded Best Article of Vol 13 issue 02
A Study by Mohita Ray et al. entitled "Accuracy of Intra-Operative Frozen Section Consultation of Gastrointestinal Biopsy Samples in Correlation with the Final Histopathological Diagnosis" is awarded Best Article for Vol 13 issue 01
A Study by Badritdinova MN et al. entitled "Peculiarities of a Pain in Patients with Ischemic Heart Disease in the Presence of Individual Combines of the Metabolic Syndrome" is awarded Best Article for Vol 12 issue 24
A Study by Sindhu Priya E S et al. entitled "Neuroprotective activity of Pyrazolone Derivatives Against Paraquat-induced Oxidative Stress and Locomotor Impairment in Drosophila melanogaster" is awarded Best Article for Vol 12 issue 23
A Study by Habiba Suhail et al. entitled "Effect of Majoon Murmakki in Dysmenorrhoea (Usre Tams): A Standard Controlled Clinical Study" is awarded Best Article for Vol 12 issue 22
A Study by Ghaffar UB et al. entitled "Correlation between Height and Foot Length in Saudi Population in Majmaah, Saudi Arabia" is awarded Best Article for Vol 12 issue 21
A Study by Siti Sarah Binti Maidin entitled "Sleep Well: Mobile Application to Address Sleeping Problems" is awarded Best Article for Vol 12 issue 20
A Study by Avijit Singh"Comparison of Post Operative Clinical Outcomes Between “Made in India” TTK Chitra Mechanical Heart Valve Versus St Jude Mechanical Heart Valve in Valve Replacement Surgery" is awarded Best Article for Vol 12 issue 19
A Study by Sonali Banerjee and Mary Mathews N. entitled "Exploring Quality of Life and Perceived Experiences Among Couples Undergoing Fertility Treatment in Western India: A Mixed Methodology" is awarded Best Article for Vol 12 issue 18
A Study by Jabbar Desai et al. entitled "Prevalence of Obstructive Airway Disease in Patients with Ischemic Heart Disease and Hypertension" is awarded Best Article for Vol 12 issue 17
A Study by Juna Byun et al. entitled "Study on Difference in Coronavirus-19 Related Anxiety between Face-to-face and Non-face-to-face Classes among University Students in South Korea" is awarded Best Article for Vol 12 issue 16
A Study by Sudha Ramachandra & Vinay Chavan entitled "Enhanced-Hybrid-Age Layered Population Structure (E-Hybrid-ALPS): A Genetic Algorithm with Adaptive Crossover for Molecular Docking Studies of Drug Discovery Process" is awarded Best article for Vol 12 issue 15
A Study by Varsha M. Shindhe et al. entitled "A Study on Effect of Smokeless Tobacco on Pulmonary Function Tests in Class IV Workers of USM-KLE (Universiti Sains Malaysia-Karnataka Lingayat Education Society) International Medical Programme, Belagavi" is awarded Best article of Vol 12 issue 14, July 2020
A study by Amruta Choudhary et al. entitled "Family Planning Knowledge, Attitude and Practice Among Women of Reproductive Age from Rural Area of Central India" is awarded Best Article for special issue "Modern Therapeutics Applications"
A study by Raunak Das entitled "Study of Cardiovascular Dysfunctions in Interstitial Lung Diseas epatients by Correlating the Levels of Serum NT PRO BNP and Microalbuminuria (Biomarkers of Cardiovascular Dysfunction) with Echocardiographic, Bronchoscopic and HighResolution Computed Tomography Findings of These ILD Patients" is awarded Best Article of Vol 12 issue 13 
A Study by Kannamani Ramasamy et al. entitled "COVID-19 Situation at Chennai City – Forecasting for the Better Pandemic Management" is awarded best article for  Vol 12 issue 12
A Study by Muhammet Lutfi SELCUK and Fatma entitled "Distinction of Gray and White Matter for Some Histological Staining Methods in New Zealand Rabbit's Brain" is awarded best article for  Vol 12 issue 11
A Study by Anamul Haq et al. entitled "Etiology of Abnormal Uterine Bleeding in Adolescents – Emphasis Upon Polycystic Ovarian Syndrome" is awarded best article for  Vol 12 issue 10
A Study by entitled "Estimation of Reference Interval of Serum Progesterone During Three Trimesters of Normal Pregnancy in a Tertiary Care Hospital of Kolkata" is awarded best article for  Vol 12 issue 09
A Study by Ilona Gracie De Souza & Pavan Kumar G. entitled "Effect of Releasing Myofascial Chain in Patients with Patellofemoral Pain Syndrome - A Randomized Clinical Trial" is awarded best article for  Vol 12 issue 08
A Study by Virendra Atam et. al. entitled "Clinical Profile and Short - Term Mortality Predictors in Acute Stroke with Emphasis on Stress Hyperglycemia and THRIVE Score : An Observational Study" is awarded best article for  Vol 12 issue 07
A Study by K. Krupashree et. al. entitled "Protective Effects of Picrorhizakurroa Against Fumonisin B1 Induced Hepatotoxicity in Mice" is awarded best article for issue Vol 10 issue 20
A study by Mithun K.P. et al "Larvicidal Activity of Crude Solanum Nigrum Leaf and Berries Extract Against Dengue Vector-Aedesaegypti" is awarded Best Article for Vol 10 issue 14 of IJCRR
A study by Asha Menon "Women in Child Care and Early Education: Truly Nontraditional Work" is awarded Best Article for Vol 10 issue 13
A study by Deep J. M. "Prevalence of Molar-Incisor Hypomineralization in 7-13 Years Old Children of Biratnagar, Nepal: A Cross Sectional Study" is awarded Best Article for Vol 10 issue 11 of IJCRR
A review by Chitra et al to analyse relation between Obesity and Type 2 diabetes is awarded 'Best Article' for Vol 10 issue 10 by IJCRR. 
A study by Karanpreet et al "Pregnancy Induced Hypertension: A Study on Its Multisystem Involvement" is given Best Paper Award for Vol 10 issue 09

List of Awardees

A Study by Ese Anibor et al. "Evaluation of Temporomandibular Joint Disorders Among Delta State University Students in Abraka, Nigeria" from Vol 13 issue 16 received Emerging Researcher Award


A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" from Vol 13 issue 06 received Emerging Researcher Award


RSS feed

Indexed and Abstracted in


Antiplagiarism Policy: IJCRR strongly condemn and discourage practice of plagiarism. All received manuscripts have to pass through "Plagiarism Detection Software" test before Toto Macau forwarding for peer review. We consider "Plagiarism is a crime"

IJCRR Code of Conduct: To achieve a high standard of publication, we adopt Good Publishing Practices (updated in 2022) which are inspired by guidelines provided by Committee on Publication Ethics (COPE), Open Access Scholarly Publishers Association (OASPA) and International Committee of Medical Journal Editors (ICMJE)

Disclaimer: International Journal of Current Research and Review (IJCRR) provides platform for researchers to publish and discuss their original research and review work. IJCRR can not be held responsible for views, opinions and written statements of researchers published in this journal.



ABOUT US

International Journal of Current Research and Review (IJCRR) provides platform for researchers to publish and discuss their original research and review work. IJCRR can not be held responsible for views, opinions and written statements of researchers published in this journal

Contact

148, IMSR Building, Ayurvedic Layout,
        Near NIT Complex, Sakkardara,
        Nagpur-24, Maharashtra State, India

editor@ijcrr.com

editor.ijcrr@gmail.com


Copyright © 2024 IJCRR. Specialized online journals by ubijournal .Website by Ubitech solutions