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A Re-investigation of the Wavelength-dependent Photoreduction of 1-Piperidinoanthraquinone: Evidence for a Mechanism of Impurity Sensitization

✍ Scribed by Paul Suppan; Stephan Huber; Edwin Haselbach

Publisher
John Wiley and Sons
Year
1983
Tongue
German
Weight
351 KB
Volume
66
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

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.

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