Chemical evidence of a triplet mechanism in the photoisomerization of nitrostibenes. Formation of singlet oxygen from triplet states of nitrostilbenes

Authors:
  • HKH. Jochen Kuhn
    H. Jochen Kuhn
  • RSRosalie Straatmann
    Rosalie Straatmann
  • DSDietrich Schulte-Frohlinde
    Dietrich Schulte-Frohlinde
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Abstract
In the presence of oxygen several photoexcited (λ > 300 nm)trans-4-nitrostilbenes give rise to the formation of singlet excited oxygen whereas trans-stilbenes substituted other groups as well as unsubstituted trans-stilbene do not.