M. Priya; k. Sathyamoorthy; p. Vinothkumar; Ro. Mu. Jauhar; p. Murali Manohar; A. Selvam
Abstract
The Mannitol single crystal was grown by slow evaporation technique and irradiated by gamma radiation. Single crystal XRD analysis showed that irradiation not changed the crystal system. The crystalline perfection of pure and irradiated Mannitol single crystal were studied by high resolution X-ray diffraction ...
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The Mannitol single crystal was grown by slow evaporation technique and irradiated by gamma radiation. Single crystal XRD analysis showed that irradiation not changed the crystal system. The crystalline perfection of pure and irradiated Mannitol single crystal were studied by high resolution X-ray diffraction analysis. The optical behaviour of pure and irradidated Mannitol was verified by the changes in the affected cut-off wavelength. The laser damage threshold was calculated for pure and irradiated Mannitol using laser source. The second harmonic generation of pure and gamma irradiated Mannitol were studied using Nd:YAG laser source and observed that SHG intensity decreases with increasing dose of gamma radiation.
M. Vijayalakshmi; R. Ezhil Vizhi; D. Rajan Babu
Abstract
Organic nonlinear optical material 4-chloroaniline (pCA) single crystal was grown by slow cooling method. The material solubility was determined by gravimetric analysis and the metastable zonewidth was measured at various temperatures. Induction period values were evaluated for different supersaturation ...
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Organic nonlinear optical material 4-chloroaniline (pCA) single crystal was grown by slow cooling method. The material solubility was determined by gravimetric analysis and the metastable zonewidth was measured at various temperatures. Induction period values were evaluated for different supersaturation ratio at different temperatures. The interfacial energies were calculated by experimentally determined induction period values. The energy results were theoretically compared with the experimental values derived from the solubility data. The nucleation parameters such as gibb’s free energy change, radius of the critical nuclei, number of molecules present in the nuclei and also nucleation rate were calculated. The unit cell parameters were determined by the X-ray diffraction analysis. pCA crystal transmission property was analyzed by UV-Vis-NIR spectrum. The various vibrational modes of different functional groups were identified and their wavenumbers were assigned from FT-Raman spectrum analysis. The nonlinear optical property of the grown crystal was measured by using Q-Switched Nd: YAG laser and the efficiency was compared to that of standard KDP. Copyright © VBRI Press.
Kalawati Saini; Florence Jojeph; Smriti S. Bhatia
Abstract
The copper (II) extended metal organic frameworks with oxalic acid ( ox = oxalate ) [Na 2 ( Cu ( ox) 2 ].H2O and[ (NH4)2 ({ Cu ( ox)2(H2O)2}{ Cu( ox)2 }] .H2O have been synthesized using electrochemical route at room temperature and applied potential at 12.5 V. Herein copper rod ...
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The copper (II) extended metal organic frameworks with oxalic acid ( ox = oxalate ) [Na 2 ( Cu ( ox) 2 ].H2O and[ (NH4)2 ({ Cu ( ox)2(H2O)2}{ Cu( ox)2 }] .H2O have been synthesized using electrochemical route at room temperature and applied potential at 12.5 V. Herein copper rod has taken as a working electrode and platinum wire as a reference electrode. The single crystal X-ray diffraction (SXRD) and other supportive techniques like as PXRD, TGA/DTA, FT-IR have been used for structural characterizations. Metal organic frameworks (MOFs) are crystalline in nature where the ligands and metal ions are assembled infinitely resulting in one, two or three-dimensional networks having direct metal-ligand coordination. The growth of the solids has been explained corresponding to the mechanistic approach proposed by Ramanan and Whittingham. The crystal packing has been influenced by the supporting electrolyte. The electrolytic method is a simple process, low energy consumption, high yield, easy control and no environmental pollution. Copyright © 2018 VBRI Press
