Accession Number:

ADA193290

Title:

Picosecond Laser Studies of Excited State Processes.

Descriptive Note:

Final rept. 1 Oct 84-30 Sep 87,

Corporate Author:

COLUMBIA UNIV NEW YORK DEPT OF CHEMISTRY

Personal Author(s):

• Eisenthal, Kenneth B.

Report Date:

1987-01-01

Pagination or Media Count:

48.0

Abstract:

The completed research was directed at fundamental investigations of ultra fast chemical reactions, the generation and decay of reactive chemical intermediates, as well as the role of the solvent and molecular motions on chemical dynamics. The construction of an amplified CPM laser enabled the opportunity to probe chemical events occuring in the femtosecond time domain. The effects of molecular geometry, solvent and solute steric effects, on the chemical dynamics was explored. An important new component of the research was the studies of chemical phenomena on surfaces as well as in bulk media. The asymmetry of forces associated with liquid surfaces was found to impose new restraints and possibilities on the generation of chemical species thus affecting the chemical species lifetimes, motions and pathways for reaction.

Descriptors:

• *PHOTOCHEMICAL REACTIONS
• *SOLVATION
• *LASER TARGET INTERACTIONS
• CHEMICAL REACTIONS
• DYNAMICS
• LIQUIDS
• MEDIA
• MOLECULAR STRUCTURE
• MOLECULES
• MOTION
• PROBES
• RESTRAINT
• SOLVENTS
• SURFACES
• TIME DOMAIN
• QUICK REACTION
• PULSED LASERS
• LIGHT PULSES
• CARBENES
• PHENYL RADICALS
• NITRILES
• REACTION KINETICS

Subject Categories:

• Radiation and Nuclear Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE