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Issue 19, 2013
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The lifetime and efficiency of triplet–triplet fluorescence from the excited state of a TMM biradical determined using transient emission spectroscopy by two-color two-laser flash photolysis

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Abstract

The single laser flash photolysis (FP) of 2-(4-benzoylphenyl)-2-phenyl-1-methylenecyclopropane gave rise to a ground state trimethylenemethane (TMM) biradical with absorption bands at 362 and 545 nm and an excited state of this biradical that displays triplet–triplet fluorescence at 580 nm. The excited biradical is likely formed via an expected two-photon process as well as an unexpected one-photon process. The fluorescence quantum yield of the excited biradical, 0.021, was successfully determined by employing a two-color two-laser FP technique.

Graphical abstract: The lifetime and efficiency of triplet–triplet fluorescence from the excited state of a TMM biradical determined using transient emission spectroscopy by two-color two-laser flash photolysis

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Publication details

The article was received on 07 Feb 2013, accepted on 25 Mar 2013 and first published on 25 Mar 2013


Article type: Communication
DOI: 10.1039/C3CP50581B
Citation: Phys. Chem. Chem. Phys., 2013,15, 7064-7069
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    The lifetime and efficiency of triplet–triplet fluorescence from the excited state of a TMM biradical determined using transient emission spectroscopy by two-color two-laser flash photolysis

    Y. Matsui, D. Kawahara, E. Ohta and H. Ikeda, Phys. Chem. Chem. Phys., 2013, 15, 7064
    DOI: 10.1039/C3CP50581B

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