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C. Schweitzer and R. Schmidt, “Physical Mechanisms of Generation and Deactivation of Singlet Oxygen,” Chem. Rev., Vol. 103, No. 5, 2003, pp. 1685-1757. doi:10.1021/cr010371d

has been cited by the following article:

• TITLE: Intense Long-Lived Fluorescence of 1,6-Diphenyl-1,3,5-Hexatriene: Emission from the S1-State Competes with Formation of O2 Contact Charge Transfer Complex

  AUTHORS: Katharina Hunger, Karl Kleinermanns

  KEYWORDS: DPH; Time-Resolved; Fluorescence; Simulations; Kinetics; Diphenylpolyenes

  JOURNAL NAME: Open Journal of Physical Chemistry, Vol.3 No.1, February 19, 2013

  ABSTRACT: The fluorescence kinetics of 1,6-diphenyl-1,3,5-hexatriene (DPH) dissolved in cyclohexane was investigated as a function of temperature, concentration and 355 nm excitation pulse energy. At concentrations above 2.5 μM and excitation energies above 1 mJ a long-lived, very intense emission, which appears within less than 5 ns and lasts up to 70 ns, is observed. During the first 50 ns the decay does not follow an exponential but rather a linear behaviour. In oxygen saturated solutions the long-lived emission is suppressed and solely short-lived fluorescence with τ 1-state and competes with the formation of DPH-O2 contact charge-transfer complexes and intersystem crossing which both quench the fluorescence. Our investigations show that even the small amount of oxygen dissolved in nitrogen saturated solutions has a distinct influence on the fluorescence kinetics of DPH.