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Dielectric and microhardness studies on L-citrulline and L-ascorbic acid admixture TGS crystals

✍ Scribed by J. Mary Linet; S. Mary Navis Priya; S. Dinakaran; S. Jerome Das

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
212 KB
Volume
43
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

Single crystals of amino acid doped (L–citrulline, L‐ascorbic acid) triglycine sulphate were grown by slow evaporation technique. The lattice parameters and crystalline quality were confirmed by powder X‐ray diffraction studies. The presence of functional groups in the grown crystals was confirmed by Fourier transform infrared spectrum analysis. The dielectric studies were carried out to identify the phase transition temperature and the dielectric constant was found to be less for both the doped crystals than pure triglycine sulphate crystal. Micro hardness studies were carried out using Vickers pyramidal indentation technique at room temperature showed a decrease in hardness due to doping. (Β© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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## Abstract Pressure effects on the Raman spectra due to the inter‐ and intramolecular vibrations of the L‐ascorbic acid crystal were studied. The intensity of the Raman bands due to the intermolecular vibrations varies in three different ways by application of pressure. The bands of the first grou