Concerning correct and incorrect assignments of Soret (S2–S0) fluorescence in porphyrinoids: a short critical review

The relaxation dynamics of electronically excited porphyrinoids are often measured by steady-state and time-resolved fluorescence methods. The unusual occurrence of measurable fluorescence from an upper excited singlet state (often identified as the second electronically excited singlet state, S 2 )...

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Veröffentlicht in:Photochemical & photobiological sciences 2014-01, Vol.13 (8), p.1117-1122
1. Verfasser: Steer, Ronald P.
Format: Artikel
Sprache:eng
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Zusammenfassung:The relaxation dynamics of electronically excited porphyrinoids are often measured by steady-state and time-resolved fluorescence methods. The unusual occurrence of measurable fluorescence from an upper excited singlet state (often identified as the second electronically excited singlet state, S 2 ) of some porphyrins has, in recent years, prompted a spate of mis-assignments of observed emission from other porphyrinoids excited in the near UV-violet regions of the spectrum. The criteria for correctly assigning fluorescence to a Soret excited state are reviewed. Questionable and mis-assigned reports are identified.
ISSN:1474-905X
1474-9092
DOI:10.1039/c4pp00122b