Premium
A Re‐investigation of the Wavelength‐dependent Photoreduction of 1‐Piperidinoanthraquinone: Evidence for a Mechanism of Impurity Sensitization
Author(s) -
Suppan Paul,
Huber Stephan,
Haselbach Edwin
Publication year - 1983
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19830660825
Subject(s) - chemistry , sensitization , photochemistry , impurity , visible spectrum , wavelength , absorption (acoustics) , mechanism (biology) , absorption spectroscopy , organic chemistry , optoelectronics , physics , quantum mechanics , acoustics , immunology , biology , philosophy , epistemology
The reported wavelength‐dependence of the photoreactivity of 1‐piperidinoanthra‐quinone (1‐PAQ) in hydrogen‐donor solvents is ascribed to a chemical sensitization by trace amounts of 1‐chloroanthraquinone, as the action spectrum for photoreactivity of the former matches the absorption spectrum of the latter. The photochemistry and photophysics of 1‐PAQ seem therefore not to violate the Kasha ‐ Vavilov rule, i.e. its photoreactivity does not involve an upper n — π* triplet state.