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Photochemical formation of thiirene and thioketene in 1,2,3-thiadiazoles with phenyl substituents studied by time-resolved spectroscopy.
- Source :
-
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology [Photochem Photobiol Sci] 2013 May; Vol. 12 (5), pp. 895-901. - Publication Year :
- 2013
-
Abstract
- 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 and IR transient absorption spectroscopies (λ(ex) = 266 nm). Ultrafast techniques show a very fast rise (<0.3 ps) of thiirene and thioketene species, formed from 1,2,3-thiadiazoles in the singlet excited state. The remarkable unimolecular stability of thiirenes in solution is observed. On a millisecond time scale thiirenes with phenyl substituents undergo an intermolecular reaction (dimerization of thiirene-thioketene complexes) leading to 1,3-dithiole derivatives.
Details
- Language :
- English
- ISSN :
- 1474-9092
- Volume :
- 12
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
- Publication Type :
- Academic Journal
- Accession number :
- 23471241
- Full Text :
- https://doi.org/10.1039/c3pp25453d