T Kishore Kumar - Academia.edu (original) (raw)
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Papers by T Kishore Kumar
nopr.niscair.res.in
Non-linear optical (NLO) organic crystals of L-argininum formate (LAF) have been grown using low ... more Non-linear optical (NLO) organic crystals of L-argininum formate (LAF) have been grown using low temperature solution growth technique. The cell parameters of the crystal were determined using single crystal X-ray diffraction analysis. FTIR analysis was done to confirm the ...
Binary liquid mixtures of Ethyl acetate + 2-Butanone at various mole fractions were prepared. The... more Binary liquid mixtures of Ethyl acetate + 2-Butanone at various mole fractions were prepared. The molecular interactions between the binary mixtures were analyzed by ultrasonic measurements using interferometer method. The densities of pure liquid mixtures were elucidated by relative measurement method. The mole fractions of Ethyl acetate and 2-Butanone were found to be 98.50 and 98.06 respectively. The FTIR spectrum shows a drastic change in the frequency for 0.6 mole fraction of Ethyl acetate and 0.4 mole fraction of 2-Butanone. The shift in the frequency values might be due to interstitial accommodation or induced dipole interaction.
Acta Crystallographica Section E Structure Reports Online, 2012
![Research paper thumbnail of Studies on the Synthesis, Growth and Characterization of ([Paranitrophenyl]Imino)Benzene NLO Crystal by Sankaranarayanan-Ramasamy Method](https://attachments.academia-assets.com/98074679/thumbnails/1.jpg)
](Journal of Minerals and Materials Characterization and Engineering, 2013
The study of imine-bridged organics has been the hot spot synthesis of second order nonlinear opt... more The study of imine-bridged organics has been the hot spot synthesis of second order nonlinear optical (SONLO) and photo-responsive materials in recent years. Herein we present a study of synthesis, growth, and characterization of ([paranitrophenyl]imino)benzene (PNPIB) NLO single crystal. The title compound was synthesized in one step by Schiff base formation. <110> PNPIB single crystal of diameter of 40 mm and length 50 mm was successfully grown by SR method using a seed as the nucleus. The growth rate formula is derived for the SR method. PNPIB single crystals of 10 mm diameter and 60 mm height have been grown at an average growth rate of 3 mm per day from the point seed in a glass crystallizer. Almost 100% stable crystal conversion efficiency was achieved. The as grown PNPIB crystals were characterized using single crystal X-ray diffraction (XRD), X-ray powder diffraction (XRPD), Fourier Transform Infrared (FTIR), Ultraviolet-Visible-Near Infrared (UV-Vis-NIR), 1 H & 13 C NMR spectral studies, dielectric measurement and NLO studies. Single crystal XRD analysis confirms that the grown ingot belongs to the space group of P 2 of monoclinic system thus exhibiting noncentrosymmetric structure. The crystalline perfection was assessed by XRPD. The powder diffraction pattern of the grown crystal has been indexed. The presence of C=N bond with intramolecular hydrogen bonding and the protonation of ions were confirmed by FTIR analysis. The UV-Vis-NIR spectrum of the crystal shows that the crystal has a cutoff at 298 nm. The 1 H & 13 C NMR spectra confirm the molecular structure. The dielectric behaviour was measured in the frequency range 1 KHz-10 KHz for the temperature range from 30˚C to 170˚C. The slight decrease in dielectric constant has been observed as the frequency is increased and the dielectric loss is very low for the entire frequency range. The second harmonic generation (SHG) in the crystal was observed by Kurtz powder technique.
材料科学技术学报: …, 2008
Benzoyl glycine (BG) is a promising organic nonlinear optical (NLO) crystal,whose second harmonic... more Benzoyl glycine (BG) is a promising organic nonlinear optical (NLO) crystal,whose second harmonic generation (SHG) efficiency is much higher than that of KDP (potassium dihydrogen phosphate).Single crystals of pure,Cu2+ and Cd2+ doped BG were grown by slow ...
Acta Crystallographica Section E Structure Reports Online, 2006
The title compound, [Ni(C 2 H 8 N 2) 3 ] 2 [Sn 2 Se 6 ], was synthesized under solvothermal condi... more The title compound, [Ni(C 2 H 8 N 2) 3 ] 2 [Sn 2 Se 6 ], was synthesized under solvothermal conditions in an ethylenediamine/water solution at 453 K. The compound contains discrete centrosymmetric [Sn 2 Se 6 ] 4À anions, which are dimers of two tetrahedral SnSe 4 groups sharing a common edge. The transition metal cation is six-coordinated by three ethylenediamine molecules in an octahedral geometry. We thank the Natural Science Foundation of China for supporting this work (20071006). metal-organic papers m2710 Duan et al. [Ni(C 2 H 8 N 2) 3 ] 2 [Sn 2 Se 6 ]
Journal of Physics and Chemistry of Solids, 2008
Physical properties such as photoconductivity, dielectric and thermal stability have been investi... more Physical properties such as photoconductivity, dielectric and thermal stability have been investigated for pure benzoyl glycine (BG) crystals. In addition to this, the influence of dopants (benzophenone and iodine) of these properties on BG crystals has been studied. Photoconductivity studies on pure BG, benzophenone-and iodine-doped BG revealed the positive photoconducting nature. The dielectric responses of the samples have been studied in the frequency range 100 Hz-500 KHz at room temperature and the results are discussed in detail. The thermogravimetric studies of pure and doped BG crystals indicate that the presence of dopants has slightly increased the decomposition temperature of pure BG samples, thereby enhancing thermal stability to the doped ones.
nopr.niscair.res.in
Non-linear optical (NLO) organic crystals of L-argininum formate (LAF) have been grown using low ... more Non-linear optical (NLO) organic crystals of L-argininum formate (LAF) have been grown using low temperature solution growth technique. The cell parameters of the crystal were determined using single crystal X-ray diffraction analysis. FTIR analysis was done to confirm the ...
Binary liquid mixtures of Ethyl acetate + 2-Butanone at various mole fractions were prepared. The... more Binary liquid mixtures of Ethyl acetate + 2-Butanone at various mole fractions were prepared. The molecular interactions between the binary mixtures were analyzed by ultrasonic measurements using interferometer method. The densities of pure liquid mixtures were elucidated by relative measurement method. The mole fractions of Ethyl acetate and 2-Butanone were found to be 98.50 and 98.06 respectively. The FTIR spectrum shows a drastic change in the frequency for 0.6 mole fraction of Ethyl acetate and 0.4 mole fraction of 2-Butanone. The shift in the frequency values might be due to interstitial accommodation or induced dipole interaction.
Acta Crystallographica Section E Structure Reports Online, 2012
Journal of Minerals and Materials Characterization and Engineering, 2013
The study of imine-bridged organics has been the hot spot synthesis of second order nonlinear opt... more The study of imine-bridged organics has been the hot spot synthesis of second order nonlinear optical (SONLO) and photo-responsive materials in recent years. Herein we present a study of synthesis, growth, and characterization of ([paranitrophenyl]imino)benzene (PNPIB) NLO single crystal. The title compound was synthesized in one step by Schiff base formation. <110> PNPIB single crystal of diameter of 40 mm and length 50 mm was successfully grown by SR method using a seed as the nucleus. The growth rate formula is derived for the SR method. PNPIB single crystals of 10 mm diameter and 60 mm height have been grown at an average growth rate of 3 mm per day from the point seed in a glass crystallizer. Almost 100% stable crystal conversion efficiency was achieved. The as grown PNPIB crystals were characterized using single crystal X-ray diffraction (XRD), X-ray powder diffraction (XRPD), Fourier Transform Infrared (FTIR), Ultraviolet-Visible-Near Infrared (UV-Vis-NIR), 1 H & 13 C NMR spectral studies, dielectric measurement and NLO studies. Single crystal XRD analysis confirms that the grown ingot belongs to the space group of P 2 of monoclinic system thus exhibiting noncentrosymmetric structure. The crystalline perfection was assessed by XRPD. The powder diffraction pattern of the grown crystal has been indexed. The presence of C=N bond with intramolecular hydrogen bonding and the protonation of ions were confirmed by FTIR analysis. The UV-Vis-NIR spectrum of the crystal shows that the crystal has a cutoff at 298 nm. The 1 H & 13 C NMR spectra confirm the molecular structure. The dielectric behaviour was measured in the frequency range 1 KHz-10 KHz for the temperature range from 30˚C to 170˚C. The slight decrease in dielectric constant has been observed as the frequency is increased and the dielectric loss is very low for the entire frequency range. The second harmonic generation (SHG) in the crystal was observed by Kurtz powder technique.
材料科学技术学报: …, 2008
Benzoyl glycine (BG) is a promising organic nonlinear optical (NLO) crystal,whose second harmonic... more Benzoyl glycine (BG) is a promising organic nonlinear optical (NLO) crystal,whose second harmonic generation (SHG) efficiency is much higher than that of KDP (potassium dihydrogen phosphate).Single crystals of pure,Cu2+ and Cd2+ doped BG were grown by slow ...
Acta Crystallographica Section E Structure Reports Online, 2006
The title compound, [Ni(C 2 H 8 N 2) 3 ] 2 [Sn 2 Se 6 ], was synthesized under solvothermal condi... more The title compound, [Ni(C 2 H 8 N 2) 3 ] 2 [Sn 2 Se 6 ], was synthesized under solvothermal conditions in an ethylenediamine/water solution at 453 K. The compound contains discrete centrosymmetric [Sn 2 Se 6 ] 4À anions, which are dimers of two tetrahedral SnSe 4 groups sharing a common edge. The transition metal cation is six-coordinated by three ethylenediamine molecules in an octahedral geometry. We thank the Natural Science Foundation of China for supporting this work (20071006). metal-organic papers m2710 Duan et al. [Ni(C 2 H 8 N 2) 3 ] 2 [Sn 2 Se 6 ]
Journal of Physics and Chemistry of Solids, 2008
Physical properties such as photoconductivity, dielectric and thermal stability have been investi... more Physical properties such as photoconductivity, dielectric and thermal stability have been investigated for pure benzoyl glycine (BG) crystals. In addition to this, the influence of dopants (benzophenone and iodine) of these properties on BG crystals has been studied. Photoconductivity studies on pure BG, benzophenone-and iodine-doped BG revealed the positive photoconducting nature. The dielectric responses of the samples have been studied in the frequency range 100 Hz-500 KHz at room temperature and the results are discussed in detail. The thermogravimetric studies of pure and doped BG crystals indicate that the presence of dopants has slightly increased the decomposition temperature of pure BG samples, thereby enhancing thermal stability to the doped ones.