ON THE MECHANISM OF THE PHOTOCHEMICAL VALENCE TAUTOMERIZATION OF 2,3-DIPHENYLINDENONE OXIDES

Authors
PULIMA I GEGIOU D HADJOUDIS E
Citation
I. Pulima et al., ON THE MECHANISM OF THE PHOTOCHEMICAL VALENCE TAUTOMERIZATION OF 2,3-DIPHENYLINDENONE OXIDES, Journal of photochemistry and photobiology. A, Chemistry, 75(2), 1993, pp. 143-150
Citations number
28
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
75
Issue
2
Year of publication
1993
Pages
143 - 150
Database
ISI
SICI code
1010-6030(1993)75:2<143:OTMOTP>2.0.ZU;2-7
Abstract
The mechanism of photochemical interconversion of white 2,3-diphenylin denone oxides to their red valence tautomers (1,3-diphenyl-2-benzopyry lium-4-oxides) was studied by quantum yield measurements of the photoi somerization at room and lower temperatures and in the presence of que nchers. With all the derivatives studied, a ground state intermediate of the photoisomerization was stabilized at 77 K confirming previous f lash photolysis work. The results indicate a diabatic transition via a 1n-pi state.