Guo Jixi, Liu Lang, Jia Dianzeng, Wang Junhua, Xie Xiaolin
Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China.
J Phys Chem A. 2009 Feb 19;113(7):1255-8. doi: 10.1021/jp808378e.
4-Acylhydroxypyrazoles combined with thiosemicarbazide derivants exhibit excellent photochromism in the crystalline state. Upon irradiation with 365 nm light, colorless enol-form isomers are converted to the yellow keto-form isomers. FT-IR, UV/vis, and fluorescence spectra were used to investigate the photochromic behavior of 1-phenyl-3-methyl-4-(3-chlorobenzal)-5-hydroxypyrazole 4-methylthiosemicarbazone. A possible photochromic mechanism has been proposed based on the analysis of the crystal structure of the sample.
4-酰基羟基吡唑与氨基硫脲衍生物结合在结晶状态下表现出优异的光致变色性能。在用365 nm光照射时，无色的烯醇式异构体转变为黄色的酮式异构体。利用傅里叶变换红外光谱（FT-IR）、紫外可见光谱（UV/vis）和荧光光谱研究了1-苯基-3-甲基-4-(3-氯亚苄基)-5-羟基吡唑4-甲基氨基硫脲的光致变色行为。基于对样品晶体结构的分析，提出了一种可能的光致变色机理。
