Effects of solvent polarity and hydrogen bonding on the fluorescence properties of trans-4-hydroxy-4′-nitrostilbenes

Mónika Megyesi, László Biczók, Helmut Görner, Zsombor Miskolczy

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5 Citations (Scopus)

Abstract

The excited singlet state properties of 4′-nitro- and 2′,4′-dinitro-substituted trans-4-hydroxystilbenes were studied in various solvents. The fluorescence quantum yield (Φf) of the former compound in solvents unable to form strong hydrogen bonds goes through a maximum as a function of the solvent polarity parameter ETN, reaching the highest value of 0.31 in butyronitrile. In contrast, a monotonous diminution of Φf and moderate changes were found in hydrogen bonding media. The addition of nitrogen-heterocyclic compounds leads to both dynamic and static fluorescence quenching due to excited-state proton transfer along the hydrogen bond. trans-2′,4′-Dinitro-4-hydroxystilbene emits only weak fluorescence in all solvents studied.

Original languageEnglish
Pages (from-to)59-63
Number of pages5
JournalChemical Physics Letters
Volume489
Issue number1-3
DOIs
Publication statusPublished - Apr 1 2010

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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