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IJPAP Vol.48(04) [April 2010] >


Title: Growth and characterization of urea-thiourea non-linear optical organic mixed crystal
Authors: Madhurambal, G
Mariappan, M
Keywords: Urea-thiourea mixed crystals
Solubility
FTIR
Non-linear optical material
Issue Date: Apr-2010
Publisher: CSIR
Abstract: Mixed crystals of urea-thiourea in various proportions have been grown in solution by slow evaporation technique at room temperature (30°C). The solubility studies have been carried out at room temperature. In the presence of high concentrations of the thiourea in the medium, the solubility decreases appreciably. X-ray diffraction study has been carried out to find the crystal system and unit cell parameters. The diffraction patterns reveal that there is change in basic structure of urea and thiourea. The presence of title compound in the crystal lattice has been qualitatively determined by FTIR analysis. Slight broadening is observed in FTIR of 0.66 and 0.9 urea-thiourea mixed crystal in the range 3500-3300 cm-1. It is found that weak hydrogen bond between urea and thiourea is present in higher proportions of urea-thiourea mixed crystal.
Page(s): 264-270
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(04) [April 2010]

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