Photophysical characterization of trans-4,4′-disubstituted stilbenes

Vladislav Papper, Dina Pines, Gertz Likhtenshtein, Ehud Pines

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

Absorption and emission spectra of twenty trans-4,4′-disubstituted stilbenes have been measured in four solvents: cyclohexane (CH), chlorobenzene (CB), 2-butanone (methylethyl ketone, MEK) and dimethylsulfoxide (DMSO) at room temperature. Fluorescence quantum yields (Φf) and fluorescence lifetimes (τf) have been measured for these stilbenes. The lifetimes and quantum yields of fluorescence were found to be dependent on the donor-acceptor properties of the substituents and correlate with the Hammett σ-constants. In addition, we experimentally observed the appearance of a second emitting state which is close energetically to the lowest exited singlet state 1t* in cases of strong donor-acceptor substituents in polar solvents.

Original languageEnglish
Pages (from-to)87-96
Number of pages10
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume111
Issue number1-3
DOIs
StatePublished - 1 Jan 1997

Keywords

  • Fluorescence lifetimes
  • Fluorescence quantum yields
  • Photophysical characterization
  • Trans-4,4′-disubstituted stilbenes

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Physics and Astronomy (all)

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