Faculty Publications
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Item Synthesis, crystal structure, and spectral analysis of antimony thiourea tetra chloride(2010) Mahesha Upadhya, K.; Udayashankar, N.K.The synthesis of antimony thiourea tetra chloride (ATTC) single crystals by solution technique at room temperature is reported. The complex crystallizes in the orthorhombic space group Pnma with four formula units ofSb[CS(NH 2)2]2Cl3·Cl in the unit cell. The structure has been solved by direct methods and refined to a final-R value of 0.0393. The synthesized crystals are characterized by FT-IR, UV-visible and TGA-DTA techniques. Copyright © Taylor & Francis Group, LLC.Item Electron irradiation effects on optical properties of semiorganic antimony thiourea bromide monohydrate single crystals(2010) Mahesha Upadhya, K.; Udayashankar, N.K.Antimony thiourea bromide monohydrate (ATBM) single crystals were grown by solution growth technique at room temperature for the first time. The UVvis, FT-IR and fluorescence spectra were recorded and electron irradiation effects on these properties were studied. The optical absorption edge of the UVvis spectrum shifts towards lower wavelength with the increase of irradiation. The fluorescence quantum yield is increased for electron irradiated ATBM crystals. The FT-IR analysis shows that the water of crystallization is weakly bonded in as-grown and electron irradiated ATBM crystals. © 2010 Elsevier B.V. All rights reserved.Item Synthesis, microhardness, FT-IR, and thermal decomposition of semiorganic antimony thiourea bromide monohydrate single crystals(2012) Mahesha Upadhya, K.; Udayashankar, N.K.Antimony thiourea bromide monohydrate (ATBM) single crystals were grown by a solution growth technique at room temperature. Microhardness studies on the grown crystal were carried out using the Vickers microhardness tester to estimate the mechanical strength of the crystal. The FT-IR analysis ascertains the presence of a metal-sulphur bond in ATBM crystals. The thermal decomposition of ATBM crystals was investigated by means of thermogravimetric analysis. © Springer Science+Business Media, LLC 2011.Item Electron irradiation effects on optical properties of semiorganic antimony thiourea tetra chloride single crystals(2012) Mahesha Upadhya, K.; Udayashankar, N.K.; Ganesh, S.Antimony thiourea tetra chloride single crystals were grown by solution growth technique at room temperature. The UV-visible, fourier transform infrared and fluorescence spectra were recorded and electron irradiation effects on these properties were studied. The optical absorption edge of the UV-visible spectrum slightly shifts towards longer wavelength with the increase of irradiation dose. The fluorescence quantum yield is decreased for electron irradiated antimony thiourea tetra chloride crystals. The presence of functional group of the as-grown and electron irradiated complex was confirmed by fourier transform infrared spectral study. © 2012 Elsevier B.V. All rights reserved.