Reduction of isoviolanthrone by reaction with photogenerated radicals

被引：0
作者：
Henry Gruen
Helmut Görner
机构：
[1] Max-Planck-Institut für Bioanorganische Chemie,
来源：
Photochemical & Photobiological Sciences | 2011年 / 10卷
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摘要：
The properties of isoviolanthrone (V1) and its corresponding dihydro form (V1-H2) in argon-saturated 1-phenylethanol in the presence of acetophenone were examined by photophysical and photochemical methods. Upon photolysis of the sensitizer, a radical-induced reduction of V1 to V1-H2 occurs. The quantum yield of this reduction is close to unity. The fluorescence of V1 has a quantum yield of 0.08, for V1-H2 Φf is strongly enhanced and the emission maximum is blue-shifted. The ketyl radical, the semiquinone radical and V1-H2 were observed in this sequence by flash photolysis. V1-H2 is unstable and undergoes oxidation to V1 on admission of oxygen.
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页码：1527 / 1530
页数：3
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