Ultrafast spectroscopy of the solvent dependence of electron transfer in a perylenebisimide dimer

J Phys Chem A. 2005 Sep 29;109(38):8548-52. doi: 10.1021/jp0502050.

Abstract

We investigate the photoinduced intramolecular electron-transfer (IET) behavior of a perylenebisimide dimer in a variety of solvents using femtosecond transient absorption spectroscopy. Overlapping photoinduced absorptions and stimulated emission give rise to complicated traces, but they are well fit with a simple kinetic model. IET rates were found to depend heavily on solvent dielectric constant. Good quantitative agreement with rates derived from fluorescence quantum yield and time-resolved fluorescence measurements was found for forward electron transfer and charge recombination rates.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Acetone / chemistry*
  • Chloroform / chemistry*
  • Dimerization
  • Dimethylformamide / chemistry*
  • Dioxanes / chemistry*
  • Electrons
  • Imides / chemistry*
  • Molecular Structure
  • Perylene / analogs & derivatives*
  • Perylene / chemistry
  • Photochemistry
  • Sensitivity and Specificity
  • Solvents / chemistry
  • Spectrometry, Fluorescence / methods
  • Spectrophotometry, Ultraviolet / methods

Substances

  • Dioxanes
  • Imides
  • Solvents
  • perylene bisimide
  • Acetone
  • Perylene
  • Chloroform
  • Dimethylformamide
  • 1,4-dioxane