Photochemical formation of thiirene and thioketene in 1,2,3-thiadiazoles with phenyl substituents studied by time-resolved spectroscopy
作者： Gotard Burdzinski , Michel Sliwa , Yunlong Zhang , Stéphanie Delbaere , Tomasz Pedzinski
DOI: 10.1039/C3PP25453D
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摘要: Photochemistry of 4-phenyl-1,2,3-thiadiazole (PT) and 4,5-diphenyl-1,2,3-thiadiazole (DPT) in solution was studied at room temperature using UV-vis IR transient absorption spectroscopies (λex = 266 nm). Ultrafast techniques show a very fast rise (<0.3 ps) thiirene thioketene species, formed from 1,2,3-thiadiazoles the singlet excited state. The remarkable unimolecular stability thiirenes is observed. On millisecond time scale with phenyl substituents undergo an intermolecular reaction (dimerization thiirene–thioketene complexes) leading to 1,3-dithiole derivatives.
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