UV-visible absorption and fluorescence studies of 4,4′-diamino-trans-stilbene and its protonated species

Yujiong Zhao, V. Khodorkovsky, J. Cohen, Z. Priel

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

4,4′-Diaminostilbene (DAS), its monoprotonated and diprotonated forms exhibit fluorescence. Their UV absorption and fluorescence emission spectra in different solvents and proton concentrations have been measured. 4-Trimethylammonium-4′-aminostibene hydrogen sulfate has been synthesized as a model for the monoprotonated DAS form. pKa values in the ground state have been measured spectrophotometrically. The Stokes shifts in solvents of different polarities, the quantum yields and the apparent rate constants of trans-cis isomerization have been determined. Solvent polarity has a strong influence on spectroscopic properties.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume99
Issue number1
DOIs
StatePublished - 13 Sep 1996

Keywords

  • 4,4′-Diaminostilbene
  • 4-Trimethylammonium-4′-aminostilbene hydrogen sulfate
  • Molecular probe
  • Photophysics
  • Spectroscopy

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