J. Rennert, M. Mayer, J. Levy
Oct 1, 1969
Citations
0
Influential Citations
2
Citations
Journal
Photochemistry and Photobiology
Abstract
Abstract— The yellow color of 9,10‐phenanthrenequinone in alcohol solution is bleached under the influence of exciting radiation in a band of wavelengths extending from the ultraviolet to the visible green. The bleaching is due to a photoreduction of the quinone yielding 9,10‐dihydroxyphenanthrene. In the presence of certain divalent metal ions, irradiation of the quinoid material results in a blue‐green long lived intermediate which may be further photo‐reduced to the colorless 9,10‐diol. The blue‐green photo‐intermediate is a cation‐semiquinone complex.