PHOTOSENSITIZATION VIA CHARGE TRANSFER OR REVERSIBLE ELECTRON TRANSFER. OXIRANE ISOMERIZATION AND SULFUR DIOXIDE EXTRUSION

P. K. DAS, A. J. MULLER, G. W. GRIFFIN, I. R. GOULD, C. ‐H TUNG, N. J. TURRO

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Abstract— N, N, N N‐Tetramethylbenzidine (NTMB) photosensitizes the cis‐trans isomerization of stilbene oxiranes (SO) and the extrusion of SO2 from dibenzyl sulfone (DBS). In acetonitrile solution it is found that in the absence of SO or DBS, singlet NTMB undergoes three processes: intersystem crossing to triplet NTMB (φISC= 0.63, kISC= 6.3 × 107s‐1), fluorescence (φf= 0.30, kf= 3 × 107s‐1), and formation of a cation by electron ejection (φion= 0.09). Both singlet and triplet sensitization are observed. A charge transfer or reversible electron transfer mechanism is proposed to explain the results.

Original languageEnglish (US)
Pages (from-to)281-285
Number of pages5
JournalPhotochemistry and photobiology
Volume39
Issue number3
DOIs
StatePublished - Mar 1984
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry

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