(Laser enhanced chemical reaction studies)

Technical Report · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/5569811· OSTI ID:5569811

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 DC1 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 techniques 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, and CS{sub 2}. 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 dynamic in molecules with more than 3 atoms.

• Research Organization: Columbia Univ., New York, NY (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-88ER13937
• OSTI ID: 5569811
• Report Number(s): DOE/ER/13937-4; ON: DE92010772
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
INFRARED RADIATION
ABSORPTION
POLYATOMIC MOLECULES
EXCITED STATES
ATOM-MOLECULE COLLISIONS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXYSULFIDE
CARBON SULFIDES
DEUTERIUM COMPOUNDS
DOPPLER EFFECT
HOT ATOM CHEMISTRY
LASERS
NITROGEN DIOXIDE
PROGRESS REPORT
ATOM COLLISIONS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
COLLISIONS
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
HYDROGEN COMPOUNDS
MOLECULE COLLISIONS
MOLECULES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RADIOCHEMISTRY
SULFIDES
SULFUR COMPOUNDS
400201* - Chemical & Physicochemical Properties
664300 - Atomic & Molecular Physics- Collision Phenomena- (1992-)
400500 - Photochemistry