Abstract

An organic crystal of Thiosemicarbazone of acetaldehyde was grown by adopting slow evaporation solution growth technique (SESGT) using methanol as a solvent. The crystal dimension up to 10X4X6 mm³ was obtained. The harvested crystal were purified by repeated recrystallization. The induction period was measured at various super saturations. These crystals were characterized by FT-IR spectra to identify functional groups. The molecular structure was analyzed by ¹H NMR. The semiconducting property was calculated by band gap energy calculation. Vickers microhardness studies provides information about the hardness of the grown crystal. Second harmonic generation efficiency of the powdered thiosemicarbazone of acetaldehyde was tested using Nd:YAG laser and it is found to be 1.6 times higher than that of potassium dihydrogen phosphate.

Keywords

Slow evaporation, Solution growth technique, Induction period, Band gap energy, Microhardness, SHG efficiency.