Table of Contents
Laser Chemistry
Volume 3, Issue 1-6, Pages 145-162

Intermolecular and Intramolecular Excited State Charge Transfer

Department of Chemistry, Columbia University, New York 10027, NY, USA

Copyright © 1983 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A primary mechanism of energy relaxation and chemical change in organic molecules in excited electronic states is charge transfer. 1 The charge transfer process can be intermolecular, involving an excited molecule and a neighboring molecule, one serving as an acceptor and the other as a donor molecule, or intramolecular, involving a charge redistribution in the excited molecule which produces a very large excited state dipole moment.

In our investigations of the dynamics of these various charge transfer processes, a picosecond laser pulse was used to excite the molecules of interest. The charge transfer dynamics were monitored by a variety of techniques, including transient absorption of the excited charge transfer complex (exciplex) or ion radicals by a time delayed picosecond pulse, and fluorescence from the exciplex and from the initially excited molecule using a picosecond streak camera for detection.