Ultrafast Studies on Electron Transfer in the Betaines: Evidence for Local Heating

Abstract

We have made ultrafast time resolved pump probe measurements on the intramolecular electron transfer (ET) of the betaines, specifically betaine30 and penta-t-butyl betaine. The data have been analyzed to determine the ET rate in a range of solvent environments, at various temperatures and at a variety of pump and probe wavelengths. In all cases, the observed ET rate is fast, often faster than predicted by common ET theories. As a result, we have extended some common theories to successfully predict the measured ET rates. In addition to the ET dynamics, the data also display evidence for local heat deposition in the immediate vicinity of the betaine molecule which our extended model qualitatively predicts.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 18, 1992
Accession Number
ADA250728

Entities

People

  • Alan E. Johnson
  • Eva Akesson
  • Gilbert C. Walker
  • Nancy E. Levinger
  • Paul F. Barbara

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Amplifiers
  • Chemistry
  • Dye Lasers
  • Dynamics
  • Electron Transfer
  • Energy Bands
  • Ground State
  • Lasers
  • Liquid Dye Lasers
  • Measurement
  • Molecules
  • Polarity
  • Spectra
  • Spectroscopy
  • Transitions

Readers

  • Control Systems Engineering.
  • Electrochemical Surface Science
  • Molecular Photonics/Laser Physics

Technology Areas

  • Microelectronics