The excited states of photoporphyrin IX

S. J. Chantrell, C. A. McAuliffe, R. W. Munn, A. C. Pratt, E. J. Land

    Research output: Contribution to journalArticlepeer-review


    Pulse radiolysis of protoporphyrin IX dimethyl ester in benzene solution produces an emitting state of lifetime 23 ns and a non-emitting state of lifetime > 240 μs. The relative lifetimes and oxygen quenching rates show the emitting state to be a singlet and the non-emitting state a triplet. Other quenching measurements on the triplet are reported. CNDO/S calculations on the conjugated system of protoporphyrin IX support the assigned multiplicities.

    Original languageEnglish
    Pages (from-to)887-891
    Number of pages5
    JournalJournal of Luminescence
    Issue numberC
    Publication statusPublished - 1976


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