Meenakshisundaram, S. and Parthiban, S. and Bhagavannarayana, G. and Madhurambal, G. and Mojumdar, S. C. (2009) Influence of organic solvent on tristhioureazinc(II)sulphate crystals. Journal of Thermal Analysis and Calorimetry , 96 (1). pp. 125-129. ISSN 1572-8943

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It was observed that the addition of a very small quantity (5 center dot 10(-3) M L(-1)) of an organic solvent, benzene (C(6)H(6)) in the aqueous growth medium (pH similar to 5.9) of tristhioureazinc(II)sulphate (ZTS) markedly influences the SHG efficiency. The measurements using Nd:YAG laser source reveal that second harmonic generation (SHG) conversion efficiency which is one of the most important nonlinear optical (NLO) properties is enhanced by benzene dopant by a factor of nearly 1.5 times. The crystalline perfection of the grown crystals was evaluated by high-resolution X-ray diffractometry (HRXRD). The full width at half maximum (FWHM) of the diffraction curve (which gives an estimate for the degree of crystalline perfection) for undoped and benzene doped specimen crystals are 26 and 15 arc sec, respectively. The reduction in FWHM due to the benzene solvent indicates the significant improvement in crystalline perfection. This very much suggests that the dissolution of trace impurities in the presence of benzene prevents the entry of impurities into the crystal lattice and at the same time enhances the growth promoting effect (GPE). Not much variation is observed in XRD, FTIR and TG-DTA of ZTS in the presence and absence of benzene in the aqueous growth medium.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Subjects: Chemistry
Depositing User: Ms Neetu Chandra
Date Deposited: 04 Sep 2012 09:05
Last Modified: 04 Sep 2012 09:05

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