Effect of viscosity and rotor size on the dynamics of twisted intramolecular charge transfer

John D. Simon, Shyh-Gang Su

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Picosecond emission spectroscopy is used to examine the kinetics of twisted intramolecular charge transfer in a series of symmetric bis((N,N-dialkylamino)phenyl) sulfones, DRAPS (R = methyl, propyl, and butyl), in alcohol solutions. Within a given solvent, the dynamics of charge transfer are not dependent on changes in the size of the rotating group; however, for a single molecule in the series of n-alcohols, the rate of charge transfer correlates with the inverse of the solvent viscosity. These seemingly contradictory observations are reconciled by taking into account polarity effects on the reaction barrier, thereby revealing that the rate of reaction for a single molecule in the series of alcohols is independent of changes in solvent viscosity.

Original languageEnglish
Pages (from-to)3656-3660
Number of pages5
JournalJournal of Physical Chemistry
Volume94
Issue number9
DOIs
Publication statusPublished - 1990 Jan 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

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