Vibrational Participation in Chemical Reactions.
Abstract
Evidence for mode-selective excitation of bimolecular reactions has been obtained in our laboratories under AFOSR support. Many laboratories have endeavored to demonstrate mode-selective excitation of either unimolecular reactions since tunable lasers have come into the hands of chemists. Success can be attributed to use of the solid inert gas environment at cryogenic temperature (12K) and investigation of bimolecular reactions that can be excited with photons of sufficiently low energy that the reactant energy level diagram is still sparse. A significant, perhaps crucial, part of this technique is that rotational degrees of freedom are frozen out. Our first system selected for study was the NO + O3 reaction. The fluorine-olefin reactions, F2 + ethylene and F2 + allene, provided our real successes. These reactions showed, first, that the reactions can be stimulated with tuned laser excitation of the olefin and, second, that the quantum yield is very strongly dependent on the energy of the exciting photon. HF Rotational Lasers- One of the significant and least understood aspects of the performance of the HF chemical laser has been the role of rotational degrees of freedom in vibrational relaxation. Nanosecond Infrared Spectroscopy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 1986
- Accession Number
- ADA173169
Entities
People
- George C. Pimentel
Organizations
- University of California, Berkeley