title: Synthesis and solid-state photochromism of 1,3-diphenyl-4- (2-chlorobenzal)-5-hydroxypyrazole 4-methylthiosemicarbazone.
abstract: A new photochromic compound containing a pyrazole-ring unit, 1,3-diphenyl-4-(2-chlorobenzal)-5-hydroxypyrazole 4-methylthiosemicarbazone, was synthesized. Its structure, photochromic properties, and photochemical kinetics were characterized. The results show that the title compound exhibits reversible enol-keto photoisomerization, excellent photostability, and high fatigue resistance. An intra- and intermolecular proton-transfer mechanism is proposed.
authors.affiliation: Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China.
authors.forename: Jixi
authors.initials: J
authors.lastname: Guo
authors.forename: Lang
authors.initials: L
authors.lastname: Liu
authors.forename: Guangfei
authors.initials: G
authors.lastname: Liu
authors.forename: Dianzeng
authors.initials: D
authors.lastname: Jia
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Xie
mesh_terms: D006860:Hydrogen Bonding; D007536:Isomerism; D007700:Kinetics; D008958:Models, Molecular; D015394:Molecular Structure; D010777:Photochemistry; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry; D012664:Semicarbazones / Q000138:chemical synthesis* / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: C523747:1,3-diphenyl-4- (2-chlorobenzal)-5-hydroxypyrazole 4-methylthiosemicarbazone; D011720:Pyrazoles; D012664:Semicarbazones; C031280:pyrazole