Laser enhanced chemical reaction studies
Experimental studies of dynamic molecular processes are described with particular emphasis on the use of a powerful infrared diode laser probe technique developed in our laboratory. This technique allows us to determine the final states of CO{sub 2} (and other molecules) produced by collisions, photofragmentation, or chemical reactions with a spectral resolution of 0.0003 cm{sup {minus}1} and a time resolution of 10{sup {minus}7} sec. Such high spectral resolution provides a detailed picture of the vibrational and rotational states of molecules produced by these dynamic events. We have used this experimental method to probe collisions between hot hydrogen/deuterium atoms and CO{sub 2}, between O({sup 1}D) atoms and CO{sub 2}, to study the final states of DCl molecules produced as a result of the reactions of hot Cl atoms, and to investigate the dynamics of the reaction between OH and CO molecules. Advances in our technique over the past two years have allowed us to identify and study more than 200 final rotational states in ten different vibrational levels of CO{sub 2} encompassing all 3 normal modes, many overtones, and combination states of the molecule. We have extended the technique to probe a variety of new molecules such as OCS, N{sub 2}O, DCl, CS{sub 2} and Cl atoms (via the {sup 2}P{sub 3/2} {yields} {sup 2}P{sub 1/2} atomic transition). All of this work is aimed at providing experimental tests for polyatomic molecule potential energy surfaces, chemical transition states in complex systems, and theories of reaction dynamics in molecules with more than 3 atoms. We hope through these experiments to provide dynamical and mechanistic information of fundamental interest for combustion and atmospheric reaction processes. 86 refs.
- Research Organization:
- Columbia Univ., New York, NY (USA). Dept. of Chemistry
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG02-88ER13937
- OSTI ID:
- 5881748
- Report Number(s):
- DOE/ER/13937-3; ON: DE91013021
- Country of Publication:
- United States
- Language:
- English
Similar Records
[Laser enhanced chemical reaction studies]. [Progress report]
Laser enhanced chemical reaction studies. Technical progress report, January 1, 1982-October 31, 1984
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
POLYATOMIC MOLECULES
EXCITED STATES
ATOM-MOLECULE COLLISIONS
CARBON DIOXIDE
CARBON OXYSULFIDE
HOT ATOM CHEMISTRY
LASERS
NITRIC OXIDE
PROGRESS REPORT
ROTATIONAL STATES
VIBRATIONAL STATES
ATOM COLLISIONS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
COLLISIONS
DOCUMENT TYPES
ENERGY LEVELS
MOLECULE COLLISIONS
MOLECULES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
RADIOCHEMISTRY
SULFUR COMPOUNDS
400500* - Photochemistry
400701 - Radiochemistry & Nuclear Chemistry- Hot-Atom Chemistry