Thermal, UV and FTIR Spectroscopic Studies of Urea-Thiourea Mixed Crystal
Corresponding Author(s) : M. Mariappan
Asian Journal of Chemistry,
Vol. 20 No. 7 (2008): Vol 20 Issue 7
Abstract
A mixed crystal of urea thiourea was grown by slow evaporation of aqueous solution at room temperature. The bright and transparent crystals obtained was characterized through thermogravimetric (TG-DTA), UV and FTIR spectroscopic analyses. A fitting decomposition pattern for the mixed crystal was formulated on the TG thermogram which shows a two stage weight loss between 200 and 750 °C. In this temperature range, DTA curve shows exothermic dips supporting the formulated decomposition pattern. The UV and FTIR spectra show the characteristic absorption, vibration frequencies due to urea-thiourea mixed crystals.
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