International Journals (Publishers: Elsevier, John Wiley, American Chemical Society, Royal Chemical Society, Taylor and Francis, Springer)

1. Growth and characterization of organic second order nonlinear optical (NLO)    4-chloroanilinium-L-tartrate monohydrate single crystals,V. Krishnakumar et al, J. Cryst. Growth (Article in Press), doi:10.1016/j.jcrysgro.2018.01.015. Impact factor: 1.751
   

2. Experimental and theoretical studies on the Structural, Spectroscopic and Hydrogen bonding on 4-nitro-n-(2,4-dinitrophenyl) benzenamine, Journal of Molecular Structure, V. Krishnakumar et al, Impact factor: 1.753

3.  Photocatalytic degradation of Metronidazole and Methylene Blue by PVA assisted Bi₂WO₆-CdS nanocomposite film under visible light irradiation, Applied Nanoscience, V. Krishnakumar et al, Impact factor: 3.363

4. Effects of anhydrous AlCl₃ dopant on the structural, optical and electrical properties of PVA-PVP polymer composite films, V. Krishnakumar et al, Indian J Phys (2017), Impact factor:0.988

5. Optical, photoconducting, thermal and anisotropic mechanical behaviour of Benzimidazolium salicylate single crystals, V. Krishnakumar et al, J. Sci. Adv. Mater. Devices (2017) 2: 445-454, doi: 10.1016/j.jsamd.2017.09.004

6. Preparation of Cerium and Sulfur Codoped TiO₂ Nanoparticles based Photocatalytic activity with Enhanced visible light, V. Krishnakumar et al, Journal of Photochemistry and Photobiology A: Chemistry(2017), Impact factor:2.625.

7. Enhancement of photocatalytic degradation of methylene blue under visible light using transparent Mg-doped CdS–PVA nanocomposite film, V. Krishnakumar et al, J Mater Sci: Mater Electron (2017), Impact factor: 1.798.

8. Intermolecular hydrogen bonding, structural and vibrational assignments of 2, 3, 4, 5-tetrafluorobenzoic acid using density functional theory, V. Krishnakumar et al, Journal of Molecular Structure 1128 (2017): 534-543. Impact factor: 1.602.

9.  Structural, intramolecular hydrogen bonding and vibrational studies on3-amino-4-methoxy benzamide using density functional theory, V. Krishnakumar et al, J. Chem. Sci.(2017) DOI 10.1007/s12039-017-1227-0. Impact factor: 1.29.

10. Density Functional Theory Calculations, Spectroscopic (FT-IR, FT-RAMAN), Frontier Molecular Orbital, Molecular Electrostatic Potential Analysis of 5-Fluoro-2-Methylbenzaldehyde, V. Krishnakumar et al,Z. Phys. Chem. (2016) DOI 10.1515/zpch-2016-0839,Impact factor: 1.35.

11. Bis (3-methoxy-4 – hydroxybenzaldehyde-2,4,6-trinitrophenol)organic cocrystal: Synthesis and physico-chemical properties, V. Krishnakumar et al, Eur. Phys. J. Plus (2016) 131: 348, Impact factor: 1.52.

12. Intermolecular hydrogen bonding, structural and vibrational assignments of 2, 3, 4, 5-tetrafluorobenzoic acid using density functional theory,V. Krishnakumar et al,J Molecular Structure (2016) 1128: 534–543, Impact factor: 1.602.

13. Photoconductivity, dielectric, thermal and mechanical studies on nonlinear optical phasematchable single crystal: 2-amino-4-methylpyridinium 4-nitrobenzoate, V. Krishnakumar et al, J Mater Sci: Mater Electron (2016) 28(2): 1706 – 1714, Impact factor: 2.019.

14. Synthesis, growth, optical and anisotropic mechanical behaviour of organic nonlinear optical imidazolium 2-chloro-4-nitrobenzoate single crystals, V. Krishnakumar et al. Eur. Phys. J. Plus (2016) 131: 375, Impact factor: 1.753.

15. Enhanced Visible Light Photocatalytic Activity of Agand Zn Doped and Codoped TiO2 Nanoparticles, V. Krishnakumar et al,J Clust Sci (2016)27:1815–1829,Impact factor: 1.664.

16. Effect of Cu doping on TiO2 nanoparticles and its photocatalytic activity under visible light, V. Krishnakumar et al,J Mater Sci: Mater Electron(2016) 27:7438–7447,Impact factor: 2.019

17. Low temperature FTIR, Raman, NMR spectroscopic and theoretical study of hydroxyethyl ammonium picrate, V. Krishnakumar et al, J Molecular Structure (2016) 1104: 40–51, Impact factor: 1.602.

18. A systematic study of hydroxyethylammonium p-nitrophenolate single crystal exhibiting third order nonlinearity, V. Krishnakumar et al, J crys grow (2016) (Article in press) Impact factor: 1.698.

19. Enhanced third-order optical nonlinearity in Ce³⁺ ion-doped zincsulfide–polyvinyl alcohol freestanding nanocomposite films, V. Krishnakumar et al, J Mater Sci (2016) 51:3241–3249, Impact factor: 2.371.

20. Molecular structure, vibration analysis (FT-IR, FT-Raman), NMR, UV, NBO and HOMO-LUMO analysis of N,N-Diphenyl Formamide based on DFT calculations, V. Krishnakumar et al, Spectrochim Acta -Part A 139 (2015) 521-532, Impact factor: 1.977.

21. Investigation of intermolecular hydrogen bonding in 2,3,4,5,6 pentafluorobenzoic acid through molecular structure and vibration analysis – A DFT approach, V.Krishnakumar et al., J.Mol.Struct 1083 (2015) 48-56, Impact factor: 1.634

22. Spectroscopic (FTIR, FT-Raman, UV and NMR) investigation and NLO, HOMO-LUMO, NBO analysis of 2-Benzylpyridine based quantum chemical calculations, V. Krishnakumar et al, Spectrochim Acta -Part A 137 (2015) 740-748, Impact factor: 1.977. 

23. Fluorescence and physical properties of the organic salt 2-chloro-4-nitrobenzoate-3-ammonium-phenol, V. Krishnakumar et al, Chemical Physics 458 (2015) 52–61

24. Experimental and theoretical investigation of non-centrosymmetric 8-Hydroxyquinolinium dibenzoyl-(L)-tartrate methonal monohydrate single crystal, V. Krishnakumar et al , Materials Research Bulletin (Article in Press), DOI: 10.1016/j.materrresbull. 2014.09.068

25. Influence of Mg dopant on the third – order non linear optical properties of Cds – PVP nanocomposite films, V. Krishnakumar et al , Materials Letters (Article in Press) DOI:10.1016/j.matlet.2014.11.086

26. Hydroxyethylammonium maleate (HEAM) single crystal for optical limiting applications, V.Krishnakumar et al, Applied Phy A 118(2015) 553-561

27. Anisotropic magnetic, transport and thermodynamic properties of novel tetragonal Ce₂RhGa₁₂ compound, V. Krishnakumar et al , Journal of Alloys and Compounds 604(2014) 379- 383. Impact Factor: 2.72

28. Synthesis, experimental and theoretical Studies of 8-hydroxyquinolinium 3,5-dinitrobenzoate single crystal, V. Krishnakumar et al, Journal ofCrystalGrowth398(2014)45–57. Impact Factor:1.693

29. Fluorescent Properties Reinforced by Proton Transfer in the salt 2,6 Diaminopyridinium Dihydrogen Phosphate, V. Krishnakumar et al, The Journal of Physical Chemistry A (Article in Press) Impact Factor: 2.771

30. Growth and characterization of 6-chloro-2, 4-dinitroaniline crystals in anti-solvent precipitation and reprecipitation method, V. Krishnakumar et al, Cryst. Eng. Comm 16(2014) 4183-4193 Impact Factor: 3.879

31. Synthesis, experimental and theoretical Studies of 8-hydroxyquinolinium 3,5-dinitrobenzoate single crystal, V. Krishnakumar et al, Journal of Crystal Growth 398(2014)45–57 Impact Factor: 1.552

32. Molecular structure, vibrational spectra, HOMO, LUMO and NMR studies of 2,3,4,5,6 -Penta Bromo Toluene and Bromo Durene based on Density functional calculations, V. Krishnakumar et al, Spectrochim Acta -Part A 125 (2014) 201-210 Impact factor: 1.977

33. Experimental and theoretical studies of 2,5-dichloroanilinium picrate, V. Krishnakumar et al, Spectrochim Acta -Part A 121 (2014) 53-62, Impact factor: 1.977

34. FT-IR, FT-Raman and DFT quantum chemical study on the molecular conformation, vibrational and electronic transitions of 1-(m-(trifluoromethyl) phenyl)piperazine, V. Krishnakumar et al, Spectrochim Acta -Part A 121 (2014) 483-493, Impact factor: 1.977

35. Spectroscopic properties, NLO, HOMO-LUMO and NBO of maltol,V. Krishnakumar et al, Spectrochim Acta -Part A 121 (2014) 245-253, Impact factor: 1.977

36. Spectroscopic (FT-IR, FT-Raman, UV and NMR) investigation, conformational stability, NLO properties, HOMO-LUMO and NBO analysis of hydroxyquinoline derivatives by density functional theory calculations, V. Krishnakumar et al, Spectrochim Acta -Part A 114 (2013) 449-474, Impact factor: 1.977

37. Vibrational assignment of the spectral data, molecular dipole moment, polarizability, first hyperpolarizability, HOMO-LUMO and thermodynamic properties of 5-nitoindan using DFT quantum chemical calculations, V.Krishnakumar et al, Spectrochim Acta -Part A 118 (2014) 663-671 Impact factor: 1.977

38. Molecular structure, Intramolecular hydrogen bonding and Vibrational spectral investigation of 2-fluoro benzamide - DFT approach, V.Krishnakumar et al, Spectrochim Acta -Part A  114 (2013) 410-420 Impact factor: 1.977

39. Vibrational spectroscopic (FT-IR and FT-Raman) studies, natural bond orbital analysis and molecular electrostatic potential surface of Isoxanthopterin, V.Krishnakumar et al, Spectrochim Acta -Part A 114 (2013) 101-113, Impact factor: 1.977

40. FTIR, FT-Raman and NMR studies on 2,6-dichlorotoluene and 2-chloro-6-fluorotoluene based on density functional theory, V.Krishnakumar et al, Spectrochim Acta -Part A 112 (2013) 429-439, Impact factor: 1.977

41. Growth and characterization of semi-organic nonlinear optical crystal: Sodium 2,4-dinitrophenolate monohydrate, V.Krishnakumar et al, Spectrochim Acta -Part A 110 (2013) 377-382, Impact factor: 1.977

42. Desired form of polymorphism of 6-chloro-2,4-dinitroaniline crystals grown by controlled growth temperature in melt growth, V.Krishnakumar et al, J. Therm. Anal. Calorim, (Article in press) (2013) 1-8, Impact factor: 1.982

43. Nonlinear optical analyses of organic N-(9-Anthrylmethylidene) methylamine Schiff base, Spectrochim Acta -Part A 109 (2013) 253-258, Impact factor: 1.977

44. Quantum mechanical study of the structure and spectroscopic (FT-IR, FT-Raman, ¹³C, and ¹H) and HOMO-LUMO analysis of 2,4-dimethoxy benzaldehyde (DMBA) and 4-methoxy-3-methyl benzaldehyde (MMBA), V.Krishnakumar et al., J.Mol.Struct 1035 (2013) 145-146, Impact factor: 1.634

45. Oxygen and Gold ion irradiation effects on hydroxyethylammonium (L) tartrate monohydrate single crystals, V.Krishnakumar et al., Radiat.Meas 49 (2013) 88-94, Impact factor: 1.177

46. Density functional theory, comparative vibrational spectroscopic studies, HOMO- LUMO, first hyperpolarizability analyses of 2-fluoro 5-nitrotoluene and 2-bromo 5-nitrotoluene, V.Krishnakumar et al., Spectrochim Acta -Part A 104 (2013) 77-86 Impact factor: 2.098  

47. Structural, optical and dielectric properties of PbS-PVA-PEG nanocomposite film, V. Krishnakumar et al., Sci. Adv. Mater. 4 (2012)1-7, Impact factor: 3.308.

48. Growth and characterization of anilinium hydrogen sulfate (AHS) single crystals: An organic nonlinear optical material, V.Krishnakuamr et al., Spectrochim Acta -Part A. 97 (2012) 798-805. Impact factor: 2.098

49. Spectroscopic, electronic structure and natural bond analysis of 2-aminopyrimidine and 4-aminopyrazole [3,4-d] pyrimidne: A comparative study, V.Krishnakumar et al., Spectrochim Acta -Part A. 96 (2012) 226-241. Impact factor: 2.098

50. Quantum mechanical study of the structure and spectroscopic (FT-IR, FT-Raman, 13C, 1H and UV), NBO and HOMO-LUMO analysis of  2-quinoxaline carboxylic acid, V. Krishnakumar et al, Spectrochim Acta -Part A: 92 (2012) 325-335, Impact factor: 2.098.

51. Growth and characterization of hydroxyethylammonium picrate single crystals for third-order nonlinear optical applications, V. Krishnakumar et al., Mater. Chem. Phys. 134 (2012) 736-746. Impact factor: 2.234, Citation: 1

52. Large third-order optical nonlinearity of Mg-doped PbS/PVA free standing nanocomposite films, V. Krishnakumar et al., J. Phys. D: Appl. Phys. 45 (2012) 165102-165108. Impact factor: 2.544

53. Molecular structure, viberational spectra, HOMO,LUMO and NMR studies of 2-chloro-4-nitrotoluene and 4-chloro-2-nitrotoluene, V.Krishnakumar et al., Spectrochim Acta.91 (2012) 1-10. Impact factor: 2.098

54. Molecular structure, spectroscopic studies (FTIR, FT-Raman and NMR) and HOMO-LUMO analysis of 6-chloro-0-cresol and 4-chloro-3-methyl phenol by density functional theoretical study, V.Krishnakumar et al., Spectrochim Acta. Part A.97 (2012) 144-154. Impact factor: 2.098

55. Optical and mechanical properties of MgCl₂ added triglycine sulphate single crystals, V. Krishnakumar et al., International Journal of Modern Physics B, 26 (2012) 1250038-50  

56. Electrical and optical properties of pure and Pb²⁺ ion doped PVA-PEG polymer composite electrolyte films, V. Krishnakumar et al., Ionics. 18 (2012) 403-411. Impact factor: 1.288

57. Studies on vibrational, dielectric, mechanical and thermal properties of organic nonlinear optical co-crystal: 2,6-diaminopyridinium 4-nitrophenolate 4-nitrophenol, V. Krishnakumar et al., Physica B. 407 (2012) 1119–1123. Impact factor: 1.063

58. Growth and nonlinear optical studies of N-acetyl-l-cysteine crystal,  V. Krishnakumar et al., Eur. Phys. J. Appl. Phys. 57 (2012) 10201, Impact factor: 0.958

59. Molecular structure, vibrational spectra, HOMO, LUMO and NMR studies of 1, 2-dichloro-4-nitrobenzene and 2, 3, 5, 6-tetrachloro-1-nitrobenzene based on density functional calculations,    V. Krishnakumar et al., Spectrochim Acta. Part A. 86 (2012) 196-204. Impact factor: 1.566

60. Studies on physico - chemical properties of Hydroxyethylammonium (L) tartrate monohydrate single crystals, V. Krishnakumar et al., Physica B 406 (2011) 4019-4026. Impact factor: 1.063, Citation: 2

61. Synthesis and characterization of CdS/(PVA-b-PEG) Copolymer nanocomposite films, V. Krishnakumar et al., International Journal of Nanotechnology and Applications, 5 (2011) 175-187.

62. Molecular structure, vibrational spectral studies of pyrazole and 3,5-dimethyl pyrazole based on density functional calculations V. Krishnakumar et al., Spectrochim Acta A 79 (2011) 1959-1968, Impact factor: 1.566, Citation: 1

63. Physicochemical properties of highly efficient organic NLO crystal: 4-aminobenzamide, V. Krishnakumar et al., Mater. Chem. Phys 128 (2011) 90-95, Impact factor: 2.015, Citation: 1

64. MgCl₂ added Triglycine Sulphate Single Crystals, V. Krishnakumar et al., Advanced Materials Letter 2 (2011) 163-169

65. Polarized Raman and Hyperpolarizability studies of Hydroxyethyl ammonium (L) tartrate monohydrate for quadratic nonlinear optics, V. Krishnakumar et al., J. Mol. Struct. 988 (2011) 17-23, Impact factor: 1.551, Citation: 2

66. Single crystal growth and structure determination of Ce₂RhGa₁₂, V. Krishnakumar et al., Chem. Metal. Alloys. 4 (2011) 229-233 

67. Structural, spectral, thermal and optical studies on organic nonlinear optical 2-naphthol crystal, V. Krishnakumar et al., Crystal Research Technology, 45 (2010) 1057-1063, Impact factor: 0.896, Citation: 1

68. Structure and vibrational frequencies of 6,7-dimethoxy-1,4-dihydro-1,3-quinoxalinedione based on density functional theory calculation: The role of p-electron conjugation and back-donation, V. Krishnakumar et al., Spectrochim Acta A 77 (2010) 238-247, Impact factor: 1.566 Citation: 4

69. Spectroscopic and physicochemical studies on organic crystal of brucine hydrogen maleate pentahydrate, V. Krishnakumar et al., Spectrochim Acta A, 77 (2010) 87-91, Impact factor: 1.566

70. Elastooptical spectra of novel L-lysine monohydrochloride dehydrate single crystals, V. Krishnakumar et al., International Journal of Modern Physics B 24 (2010) 629, Impact factor: 0.856, Citation: 2

71. Semiorganic nonlinear optical l-lysine sulphate growth and characterization, V. Krishnakumar et al., Spectrochim Acta A 75 (2010) 1394, Impact factor: 1.566, Citation: 2  

72. Investigation on the physicochemical properties of 2,4-dinitrophenol-:Efficient organic nonlinear optical crystal for frequency doubling, V. Krishnakumar et al., Physica B Condensed Matter 405 (2010) 1652, Impact factor: 0.856 Citation: 2

73. Analysis of structure and vibrational spectra of 2,5 dihydroxybenzoicacid  based on density functional theory calculations   V. Krishnakumar et al., J. Raman Spectrosc. 41 (2010) 473, Impact factor: 3.147 Citation: 2

74. Parametrical optical effects in the 1:1 complex of resorcinol and urea – a nonlinear optical crystal,  V. Krishnakumar et al., Physica B Condensed Matter 405 (2010) 839, Impact factor: 0.856       Citation: 6

75. The effect of nitric acid (HNO₃) on growth, spectral, thermal and dielectric properties of triglycine sulphate (TGS) crystal, V. Krishnakumar et al., Spectrochim Acta A 75 (2010) 617, Impact factor: 1.566, Citation: 3

76. Density functional theory calculations and vibrational spectra of 2-bromo-4-chloro phenol and 2-chloro-4-nitro phenol, V. Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 1551, Impact factor: 3.147 Citation: 10

77. Investigation on 3-aminophenol: A nonlinear optical crystal for frequency doubling, V. Krishnakumar et al., Eur. Phys. J. Appl. Phys, 48 (2009) 20403, Impact factor: 0.756 Citation: 1

78. Density functional theory calculations and vibrational spectra of p-bromonitrobenzene, V. Krishnakumar et al., J. Raman Spectrosc. 40 (2009) 936, Impact factor: 3.147 Citation: 1

79. Growth, spectral studies, thermal and dielectric aspects of L-lysine doped triglycine sulpho phosphate (TGSP) crystals, V. Krishnakumar et al., Spectrochim. Acta A 74 (2009) 248, Impact factor: 1.566

80. Structure and vibrational analysis of 1-hydroxy naphthalene based on density functional theory calculations, V. Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 1599, Impact factor: 3.147  Citation: 3

81. Fourier transform infrared and Raman spectra, vibrational assignment and density functional theory calculations of 1,4,5-triazanaphthalene, V. Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 1183, Impact factor: 3.147 Citation: 2

82. Growth and vibrational spectroscopic studies of strontium tartrate (C₄H₄O₆Sr) a non linear optical single crystal, V. Krishnakumar et al.,  J.Raman Spectrosc, 40 (2009) 627, Impact factor: 3.147 Citation: 2

83. Density functional theory study and vibrational analysis of FT-IR and FT-Raman spectra of N-hydroxyphthalimide, V.Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 987-991, Impact factor: 3.147   Citation: 3

84. Crystal structure, vibrational, and optical investigations of semiorganic nonlinear optical crystal: Bi₃[CS(NH₂)₂]₉Cl₉.2H₂O V.Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 1011, Impact factor: 3.147 Citation: 1

85. A joint FTIR, FT-Raman and scaled quatum mechanical study of 1,3-dibromo-2,4,5,6-tetra-fluro benzene (DTB) and 1,2,3,4,5-pentafluro benzene (PB). V.Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 1104, Impact factor: 3.147 Citation: 1

86. Analysis of vibrational spectra of 2-fluoro-6-nitrotoluene based on density functional theory calculations, V. Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 411, Impact factor: 3.147 Citation: 3

87. Density functional and experimental studies on the FT-IR and FT-Raman spectra and structure of Benzoic Acid and 3,5-Dichloro Salicylic Acid, V. Krishnakumar et al., J. Raman Spectrosc, 40 (2009) 264, Impact factor: 3.147 Citation: 7

88. Synthesis, crystal growth and characterization of an organic nonlinear optical Donar-p-acceptor single crystal: 2-amino-5-nitropyridinium-Toluenesulfonate, V. Krishnakumar et al., Crystal Growth & Design 9 (2009) 3333-3337, Impact factor: 4.162

89. 3-nitroaniline and 3-nitrophenol – A novel non linear optical material for opto electronic applications, V. Krishnakumar et al., Journal of Optoelectronics and Advanced Materials 11 (2009) 123 -133, Impact factor: 0.433 Citation: 1

90. Simulation of IR and Raman spectra of p-hydroxyanisole and p-nitroanisole based on scaled DFT force fields and their vibrational assignments, V. Krishnakumar et al., Spectrochimica Acta A 74 (2009) 154-161, Impact factor: 1.566 Citation: 5

91. Scaled quantum chemical studies on the vibrational spectra of 4-bromobenzonitrile, V. Krishnakumar et al., Spectrochim Acta A 71 (2009) 1810-1813, Impact factor: 1.566 Citation: 21

92. FTIR, FT Raman and thermal studies of bisthiourea manganese chloride-An organo metallic crystal, V. Krishnakumar et al.,  Spectrochim Acta A, 71 (2009) 1634-1637, Impact factor: 1.566 Citation: 2

93. Zinc potassium phosphate hexahydrate crystals for nonlinear optics, V. Krishnakumar et al., Eur. Phys. J. Appl. Phys 47 (2009) 30701, Impact factor: 0.756 Citation: 2

94. FTIR, FT-Raman, Scaled quantum chemical studies of the structure and vibrational spectra of 1,5-dinitronaphthalene, V. Krishnakumar et al., Spectrochim Acta A, 72 (2009) 941-946, Impact factor: 1.566 Citation: 23

95. Scaled quantum chemical calculations and FTIR, FT-Raman spectral analysis of 2-Methylpyrazine, V. Krishnakumar et al., Spectrochim Acta A 72 (2009) 743-747, Impact factor: 1.566 Citation: 5

96. Analysis of vibrational spectra of 1-chloro-2,4-dinitrobenzene based on density functional theory clacualtions, V. Krishnakumar et al.,  Spectrochim. Acta A 72 (2009) 738-742, Impact factor: 1.566, Citation: 13

97. Physicochemoical properties of organic nonlinear optical crystal for frequency doubling: Glycine acetamide, V. Krishnakumar et al., Mater.Lett. 63 (2009) 1255-1257, Impact factor: 1.940, Citation: 1

98. Growth and spectroscopic analysis of semi-organic bisthiourea sodium fluoride crystal, V. Krishnakumar et al., Mater.Lett. 63 (2009) 687-690, Impact factor: 1.940 Citation: 1  

99. Crystallization kinetics study in orthogonal liquid crystalline phases formed by Schiff's base nO.m compounds by calorimetric and dielectric techniques - Part 2, V. Krishnakumar et al., Molecular Crystals Liquid Crystals 515 (2009) 49, Impact factor: 0.451, Citation: 2

100. Crystallization kinetics study on Orthogonal ordering in N-(p-n-Alkyoxybenzylidene)-p-n-Alkylanilines (nO.m compounds) by thermal and electrical techniques. Part I, V. Krishnakumar et al., Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences 64a (2009) 354, Impact factor: 0.709

101. Crystallization kinetics study on tilted ordering in N-(p-n-alkyoxybenzylidene)-p-n-alkylanilines (nO.m compounds) by thermal and electrical techniques. Part I, V. Krishnakumar et al., Physics B: Condensed Matter 404 (2008) 1310, Impact factor: 1.056 Citation: 1

102. Crystallization kinetics study on tilted ordering in N-(p-n- alkoxybenzylidene)-p-n-alkylanilines (nO·m compounds) by thermal and electrical techniques part II, V. Krishnakumar et al., Molecular Crystals Liquid Crystals, 493 (2008) 17, Impact factor: 0.451 Citation: 21

103. L-lysine monohydrochloride dihydrate as novel elasto- and electrooptical materials, V. Krishnakumar et al., J. Materials Letters 62 (2008) 4597-4600, Impact factor: 1.940  Citation: 7

104. Terahertz generation in 3-Nitroaniline Single Crystals, V. Krishnakumar et al., Crystal Growth and Design 8(11) (2008) 3882-3884, Impact factor: 4.162  Citation: 5

105. Density functional theory calculations and vibrational specta of 3,5 dichloro hyroxy benzaldehyde and 2,4 dichloro benzaldehyde V. Krishnakumar et al., J. Raman Spectrosc 39 (2008) 1890-1899, Impact factor: 3.147 Citation: 2

106. Density functional theory study of Fourier transform infrared and Raman spectra of 2-amino-5-chloro benzonitrile, V. Krishnakumar et al., Spectrochim Acta A 71 (2008) 465-470, Impact factor: 1.566, Citation: 12

107. Structures and vibrational frequencies of 2-naphthoic acid and 6-bromo-2-naphthoic acid based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A, 70 (2008) 201-209, Impact factor: 1.566 Citation: 13

108. FT-Raman and FTIR spectra, normal coordinate analysis and ab initio computations of (2-methylphenoxy) acetic acid dimer, V. Krishnakumar et al., Vibrational Spectroscopy 47(1) (2008)10-20, Impact factor: 1.931 Citation: 13

109. Effect of doping an organic molecule ligand on TGS single crystals, V. Krishnakumar et al., Spectrochim Acta A, 71 (2008) 480-485, Impact factor: 1.566  Citation: 7

110. Studies on crystal growth, vibrational and optical properties of organic nonlinear optical crystal: p-Aminoazobenzene, V. Krishnakumar et al., Spectrochim. Acta A 71 (2008) 502-507, Impact factor: 1.566 Citation: 9

111. Synthesis, structure and spectral investigation of hydrogen bonded helical chain in mixed ligand Cu(II) pyrimidone complex, V. Krishnakumar et  al., Spectrochim Acta A 71 (2008) 609-615, Impact factor: 1.566, Citation: 1

112. Simulation of IR and Raman spectral based on scaled DFT force fields: A case study of 2-amino 4-hydroxy 6-trifluoromethylpyrimidine, with emphasis on band assignment, V. Krishnakumar et  al., Spectrochim Acta A 71 (2008) 449-457, Impact factor: 1.566 Citation: 32

113. Probes on l-lysine monohydrochloride dihydrate: A semiorganic nonlinear optical crystal,  V. Krishnakumar et al., Spectrochim Acta A 71 (2008) 471-479, Impact factor: 1.566 Citation: 1

114. Photoinduced second harmonic generation studies on Tris(thiourea)copper(I)perchlorateCu(SC(NH₂)₂)₃(ClO₄) V. Krishnakumar et al., J. Raman Spectrosc, 39 (2008)1450-1454 , Impact factor: 3.147 Citation: 15

115. DFT simulations and vibrational analysis of FTIR and FT-Raman spectra of 2-amino-4,6 dihrdroxy pyrimidine, V. Krishnakumar et al., J. Raman Spectrosc, 39(5) (2008) 679-684, Impact factor: 3.147 Citation: 8

116. Field-induced non-linear optical features of p-aminoazobenzene crystals, V. Krishnakumar et al., European Physical Journal Applied Physics, 42 (2008) 263-267, Impact factor: 0.756 Citation: 5

117. Studies on the first order hyperpolarizability and terahertz generation in 3-nitroaniline, V. Krishnakumar et al.,  Physica B: Physics of Condensed Matter, 403 (2008) 1863-1869, Impact factor: 0.856 Citation: 14

118. Investigations on the physicochemical properties of the nonlinear optical crystal for blue green laser generation, V. Krishnakumar et al., Spectrochim Acta A, 71 (2008) 119-124, Impact factor: 1.566  Citation: 2

119. Crystal growth and characterization of N- Hydroxyphthalimide (C₈H₅NO₃) crystal, V. Krishnakumar et al., Spectrochim Acta A, 71 (2008)110-115, Impact factor: 1.566

120. Density functional theory study of vibrational spectra, and assignment of fundamental vibrational modes of 1-Bromo 4-fluoronaphthalene, V. Krishnakumar et al., Spectrochim Acta A, 70 (2008) 991-996, Impact factor: 1.566 Citation: 16

121. FT-IR and Raman spectra vibrational assignments and density functional calculations of 1-Naphthyl acetic acid, V. Krishnakumar et al., Spectrochim Acta A, 70 (2008) 210-216, Impact factor: 1.566 Citation: 12

122. Structures and vibrational frequencies of 2-naphthoic acid and 6-bromo-2-naphthoic acid based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A, 70 (2008) 201-209, Impact factor: 1.566 Citation: 17

123. Density functional theory calculations and vibrational spectra of 6-methyl 1,2,3,4- tetrahyroquinoline, V. Krishnakumar et al., Spectrochim Acta A,  69 (3) (2008) 853-859, Impact factor: 1.566 Citation: 4

124. Structure and vibrational frequencies of 1- Naphthaldehyde based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A, 69 (2) (2008) 528-533, Impact factor: 1.566 Citation: 9

125. Density functional and experimental studies on the FT-IR and FT-Raman spectra and structure of 2,6-diamino purine and 6-methoxy purine, V. Krishnakumar et al., Spectrochim Acta A 69 (2008) 8-17, Impact factor: 1.566 Citation: 5

126. Density functional theory study of vibrational spectra and assignment of fundamental vibrational modes of 1-methyl 4-piperidone, V. Krishnakumar et al., Spectrochim Acta A, 68 (2007) 845-850, Impact factor: 1.566 Citation: 11

127. Scaled quantum chemical calculations and FT-IR, FT-Raman spectral analysis of 2-methyl piperazine, V. Krishnakumar et al., Spectrochim Acta A 68 (2007) 833-838, Impact factor: 1.566 Citation: 7

128. Density functional theory studies on tautomeric stability and infrared and Raman spectra of some purine derivatives, V. Krishnakumar et al.,  Spectrochim Acta A 68 (2007) 823-832, Impact factor: 1.566 Citation: 3

129. Analysis of vibrational spectra of 5,6-dimethyl benzimidazole based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A. 68 (2007) 811-816, Impact factor: 1.566  Citation: 8

130. Crystal growth, structural and spectroscopic analysis of  Hypoxanthinium chloride Monohydrate, V. Krishnakumar et al., Spectrochim Acta A 67 (2007) 750-755, Impact factor: 1.566 Citation: 1

131. Vibrational spectra and structure of 5,6-diamino uracil and 5,6-dihydro-5-methyl uracil by density functional theory calculations. V. Krishnakumar et al., Spectrochim Acta A 66 (2007) 503-511, Impact factor: 1.566 Citation: 5

132. Study of the damage produced in K [CS (NH₂)₂] ₄ Br non-linear optical single crystal by swift heavy ion irradiation, V. Krishnakumar et al.,  Nuclear Inst. and Methods in Physics Research, B 256 (2007) 675-682, Impact factor: 1.317 Citation: 4

133. Crystal Growth and vibrational spectroscopic analysis of semi organic non-linear optical crystal Bisthioureamagnesiumsulphate, V. Krishnakumar et al., Spectrochim Acta A. 68 (2007) 113-116, Impact factor: 1.566 Citation: 5 

134. Infrared and Polarized Raman spectra of single crystal Dixanthinium tetrachlorozincate single crystal, V. Krishnakumar et al., Journal of Physics Chemistry of Solids 68 (2006) 256-263, Impact factor: 1.189 Citation: 3 

135. Vibrational spectroscopic analysis of Cytosine monohydrate and its Copper II complex, V. Krishnakumar et al., 66 (2006) 1340-1346, Impact factor: 1.566 Citation: 4

136. Crystal growth and characterization of K[CS(NH₂)₂]₄Br - a semiorganic non-linear optical crystal, V. Krishnakumar et al., Spectrochim Acta A. 68 (2006) 443-453, Impact factor: 1.566 Citation: 8

137. DFT studies of the structure and vibrational assignments of  4-hydroxy quinazoline and 2-hydroxy benzimidazole, V. Krishnakumar et al., Spectrochim Acta A. 66 (2006) 1082-1090, Impact factor: 1.566 Citation: 11

138. Vibrational spectroscopic studies of an organic non-linear optical crystal 8-hydroxyquinolinium picrate, V. Krishnakumar et al., Spectrochim Acta A. 66 (2006) 924-934, Impact factor: 1.566 Citation: 9

139. FT-IR, FT-Raman spectra and scaled quantum mechanical study of  2,3-dihydroxy pyridine and 2,4-dihyroxy-3-nitropyridine, V. Krishnakumar et al., Spectrochim Acta A 65 (2006) 147-153, Impact factor: 1.566 Citation:8

140. Polarised Raman and infrared spectral analysis of L-alanine oxalate (C₅H₉NO₆) - a non-linear optical single crystal, V. Krishnakumar et al., Spectrochim Acta A 64 (2006) 736-743, Impact factor: 1.566 Citation: 7

141. Structures and vibrational frequencies of 2- hydroxy 3-methoxy - 5-nitro benzaldehyde and 2-methoxy-1 napthaldehyde based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A., 63 (2006) 464-476, Impact factor: 1.566 Citation: 13

142. Molecular and vibrational structure of 2-mercapto pyrimidine and 2,4 diamino 6- hydroxy 5-nitrsopyrimidine: FTIR, FT Raman and quantum chemical calculations- V. Krishnakumar et al., J. Spectrochim Acta A., 63 (2006) 454-463, Impact factor: 1.566 Citation: 14

143. Analysis of vibrational spectra of 4-amino-2, 6-Dichloro pyridine and 2-chloro- 3,5-dinitro pyridine based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A. 65 (2006) 147-154, Impact factor: 1.566 Citation: 37

144. Scaled quantum chemical calculations and FTIR, FT-Raman spectral analysis of 3,4-diamino bezophenone, V. Krishnakumar et al.,  Spectrochim Acta A., 62 (2005) 1081-1088, Impact factor: 1.566 Citation: 2

145. Density functional theory study of FTIR spectra of phthalimide and N-bromo phthalimide, V. Krishnakumar et al, Spectrochim Acta A., 62 (2005) 918-925, Impact factor: 1.566  Citation: 46

146. Density functional theory study of vibrational spectra and assignment of fundamental vibrational modes of succinimide and N-bromo succinimide, V. Krishnakumar et al., Spectrochim Acta A.62 (2005) 931-939, Impact factor: 1.566 Citation: 15

147. Scaled quantum chemical studies of the structure and vibrational spectra of 2-(methylthio) benzimidazole, V. Krishnakumar et al., Spectrochim Acta A. 62 (2005) 570-577, Impact factor: 1.566 Citation: 26

148. Density functional theory study on the structure and vibrational spectra for cyanuric chloride,  V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 3112-3116, Impact factor: 1.566 Citation: 3

149. Growth and vibrational spectroscopic studies of pure and yttrium doped single crystals of trisodium barium pentachloride dihydrate, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 2724-2729, Impact factor: 1.566 Citation: 5

150. Scaled quantum chemical studies of the structure and vibrational spectra of 2,4, diamino quinozoline and 4- amino 2-methyl quinoline, V. Krishnakumar et al., J. Chem.Phys 312 (2005) 227-240, Impact factor: 2.277 Citation: 1

151. Vibrational spectra and potential energy distributions 4,5 dichloro 3-hydroxy pyridazine by density functional theory and normal coordinate calculations, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 2526-2532, Impact factor: 1.566 Citation: 5

152. DFT studies vibrational spectra and conformational stability of 4- hydroxy and 3- methyl acetophenone and 4- hydroxy 3- methyl acetophenone, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 2510-2525, Impact factor: 1.566  Citation: 12

153. Vibrational analysis of 1,4-diaminoanthraquinone and 1,5-dichloroanthraquinone. A joint FTIR, FT-Raman and scaled quantum chemical study, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 1799-1809, Impact factor: 1.566  Citation: 10

154. FTIR and FT-Raman spectra, vibrational assignments and density functional theory calculations of 2,6-dibromo-4-nitroaniline and 2-(methylthio) aniline, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 1811-1819, Impact factor: 1.566  Citation: 16

155. DFT studies vibrational spectra of isoquinoline 8-hydroxyquinoline, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 673-683, Impact factor: 1.566 Citation: 20   

156. Analysis of vibrational spectra of 5-fluoro,5-chloro and 5-bromo- cytosines based on density functional theory calculations, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 1001-1006, Impact factor: 1.566 Citation: 15

157. Density functional theory calculations and vibrational spectra 3,5-dibromopyridine and 3,5-dichloro-2, 4,6-trifluoropyridine, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 253-260, Impact factor: 1.566 Citation: 56

158. Density functional study and the vibrational spectra of 4-chloro, 5-fluoro 1,2-phenylenediamine,  V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 199-204, Impact factor: 1.566 Citation: 6

159. Hydrogen bonding and molecular vibrations of 3,5-diamino-1,2,4-triazole, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 261-267, Impact factor: 1.566 Citation: 5  

160. Growth and spectroscopic characterization of a new organic non linear optical crystal - 8-hydroxyquinoline, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 1097-1103 Impact factor: 1.566   Citation: 14  

161. Crystal growth and vibrational spectroscopic studies of the semi organic non-linear optical crystal-bisthiourea zinc chloride, V. Krishnakumar et al., Spectrochim Acta A. 61 (2005) 499-507, Impact factor: 1.566 Citation: 29  

162. Polarised infrared and Raman studies of YCa₄O (BO₃) - a non-linear optical single crystal, V. Krishnakumar et al., Spectrochim Acta A. 60 (2004) 2733-2739, Impact factor: 1.566 Citation: 18

163. Simulation of IR and Raman spectra based on scaled DFT force fields: a case study of 2-(methylthio) benzonitrile with emphasis on band assignment, V. Krishnakumar et al., J. Mol. Struct. 702 (2004) 9-21, Impact factor: 1.551 Citation: 72

164. FT Raman and FTIR spectral studies of 3-mercapto-1, 2,4-triazole, V. Krishnakumar et al., Spectrochim Acta A. 60 (2004) 709-714,  Impact factor: 1.566 Citation: 52

 National Journals (Indian Journal of Pure and Applied Physics - viewed via niscair.res.in)

1. Normal coordinate analysis of 1-chloroisoquinoline and 2-methyl-8 nitroquinoline, V. Krishnakumar et al., Indian J.pure & Appl Phys 43 (2005) 573-578, Impact factor: 0.34 Citation: 5

2. Vibrational and normal coordinate analysis of Xanthine and Hypoxanthine, V. Krishnakumar et al., Indian J. Pure & Appl. Phys, 42 (2004), Impact factor: 0.34 Citation: 5

3. FTIR, FT-Raman spectral analysis and normal coordinate calculations 2-hydroxy-3-methoxybenzaldehydethiosemicarbozoneV.Krishnakumar et al., Indian J.Pure & Appl.Phys, 42 (2004) 313, Impact factor: 0.34 Citation: 2

4. Normal coordinate analysis of vibrational spectra of 2- methyl indoline and 5- hydroxyindane, V. Krishnakumar et al., Indian J. Pure & Appl.Phys, 41 (2003) 95, Impact factor: 0.34 Citation: 25 

5. Spectral and normal coordinate analysis of 5,6-dihydro-5-methyl uracil, V.  Krishnakumar et al, Indian J. Pure & Appl. Phys, 41 (2003) 258, Impact factor: 0.34 Citation: 4

6. Vibrational and normal coordinate analysis of Thymine hydrochloride, V. Krishnakumar et al, Indian J. Pure & Appl. Phys, 41 (2003) 341, Impact factor: 0.34 Citation: 9

7. Normal coordinate analysis of 2-mercapto and 4,6-dihydroxy-2-mercapto pyrimidines, V. Krishnakumar et al, Indian J.Pure & Appl.Phys 41 (2003) 597, Impact factor: 0.34 Citation: 58

8. Vibrational analysis of some pyrazole derivatives, V. Krishnakumar et al, Indian J. Pure & Appl. Phys, 41 (2003) 844, , Impact factor: 0.34 Citation: 15  

9. Normal coordinate analysis of 2,6-dimino purine, V. Krishnakumar et al., Asian Journal of chemistry 14 (2002) 62, Impact factor: 0.159

10. Spectral and normal coordinate analysis of 6-methoxypurine, V. Krishnakumar et al, Indian J.Pure & Appl.Phys.,40 (2002) 252, Impact factor: 0.34

11. Vibrational assignment of 2,6 di(p-methoxy phenyl)-3-methyl piperidone,2,6,-di(p-methyl phenyl)-3-methyl piperidone,2,6-di(0-hydroxy phenyl)-3-methyl piperidone and 1-methyl- 2,6(p-methoxy phenyl) piperidone, V. Krishnakumar et al, Indian J.Pure & Appl. Phys., 40 (2002) 72, Impact factor: 0.34 Citation: 12

12. Synthesis, spectral studies and normal coordinate analysis of 2,6-diphenyl-3-methyl piperidine,      V. Krishnakumar et al., Asian Journal of Chemistry 13 (2001) 1299 Impact factor: 0.159  Citation: 2

13. Vibrational and normal coordinate analysis of 1-methyl-2,6-diphenylpiperidine, V. Krishnakumar et al., Asian Journal of Chemistry 13 (2001) 692 Impact factor: 0.159

14. Vibrational spectra and normal coordinate analysis of 4-amino pyrazole (3,4-d) pyrimidine, V. Krishnakumar et al., Asian Journal of Chemistry 13 (2001) 383 Impact factor: 0.159       Citation: 2

15. Spectral and normal coordinate analysis of 5,6-diamino uracil, V. Krishnakumar et al., Indian J Pure & Appl.Phy, 39 (2001) 829, Impact factor: 0.34 Citation: 8

16. Normal coordinate analysis of 5-flouro,5-chloro and 5-bromo cytosines, V. Krishnakumar et al., Indian J.Pure & Appl. Phys, 39 (2001) 623, Impact factor: 0.34 Citation: 16

17. Vibrational and normal coordinate analysis of 2-mercaptobenzothiazole  V. Krishnakumar et al., 12 (2000) 331 Impact factor: 0.159

18. Spectral analysis and Normal coordinate analysis of 2,4 Dinitrophenylhydrazine, V. Krishnakumar et al., Indian J.Pure & Appl. Phys.36 (1998) 171, Impact factor: 0.34 Citation: 5

19. Normal coordinate analysis of 5, 6-dimethyl benzimidazole and assignments of infrared and Raman bands, V. Krishnakumar et al., Indian J. Pure & Appl. Phys 35 (1997) 1, Impact factor: 0.34        Citation: 10

20. Vibrational analysis of phenylbutazone and oxyphenbutazone, V. Krishnakumar et al.,  Asian Journal of Physics 3 (1994) 159-162

21. Normal Coordinate analysisi of some uracil derivatives, V. Krishnakumar et al., Asian Journal of Physics 3 (1994)163-166

22. Fourier transform infrared and laser Raman spectral analysis of 5-fluorouracil. Asian Journal of Physics V. Krishnakumar et al.,  3 (1994) 167-169

23. Vibrational analysis of Phenyl Butazone, V. Krishnakumar et al., Asian Journal of Chemistry 7(1995) 259-262

24. Molecular structure, spectroscopic (FT-IR, FT-RAMAN), HOMO-LUMO, NMR, and MEP analysis of methyl-m-toluate,Asian Journal of Physics V. Krishnakumar et al.,Vol. 25, No 6 (2016)