Crystal Structure and Photochromism of a Novel Organic Compound Condensed by Pyrazolone with Thiosemicarbazide

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2006,（4）
• 页码范围: 569-572
• 页数: 4页
• 语种: 英文

摘要

A new photochromic organic compound of thiosemicarbazone, 4-(p-bromo-α-methylaminothiocarbonyl hydrazonobenzal)-2,5-dihydro-3-methyl-5-oxo-l-phenyl pyrazole, was synthesized and characterized by elemental analyses, IR, 1H NMR spectra, and X-ray single-crystal diffraction analysis. The compound exhibited an interesting photochromism in the solid state when irradiated by ultraviolet light at 365 nm. The photochromic kinetics was studied by the time-dependent powder UV-Vis reflectance spectra. The intermolecular and intramolecular hydrogen-bonding interactions may be responsible for the photochromic phenomenon.