Accession Number : ADA136137

Title :   Picosecond Laser Studies of Excited State Processes.

Descriptive Note : Final technical rept. 1 Oct 80-30 Sep 83,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CHEMISTRY

Personal Author(s) : Eisenthal,K B

PDF Url : ADA136137

Report Date : 15 Nov 1983

Pagination or Media Count : 10

Abstract : Progress is reported in studies of key chemical and physical processes by which molecules in excited electronic states dissipate their excess energy. Many of these energy relaxing mechanisms and related molecular motions are so extremely rapid, especially in liquids, that they require special techniques for their study. To this end sophisticated picosecond laser systems were constructed which enable detection of transient absorption, emission and scattering events on the picosecond time scale. Spectroscopic methods are used to address two important classes of chemical problems. One is the key role played by excited state intramolecular charge transfer processes in opening up new pathways for chemical change, energy transfer and decay in molecular systems. The second area is aimed at the key aspect of chemical reactions, namely the identification and study of the properties of the short-lived chemical intermediates occurring in chemical reactions.

Descriptors :   *Molecules, *Electronic states, *Photodissociation, Kinetics, Lasers, Microsecond time, Excitation, Charge transfer, Energy transfer, Chemical reactions

Subject Categories : Physical Chemistry
      Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE