Time-resolved FTIR (Fourier transform infrared) emission studies of laser photofragmentation and chain reactions

Technical Report · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6658722

Leone, S R

Recent progress is described resulting from the past three years of DOE support for studies of combustion-related photofragmentation dynamics, energy transfer, and reaction processes using a time-resolved Fourier transform infrared (FTIR) emission technique. The FTIR is coupled to a high repetition rate excimer laser which produces radicals by photolysis to obtain novel, high resolution measurements on vibrational and rotational state dynamics. The results are important for the study of numerous radical species relevant to combustion processes. The method has been applied to the detailed study of photofragmentation dynamics in systems such as acetylene, which produces C{sub 2}H; chlorofluoroethylene to study the HF product channel; vinyl chloride and dichloroethylene, which produce HCl; acetone, which produces CO and CH{sub 3}; and ammonia, which produces NH{sub 2}. In addition, we have recently demonstrated use of the FTIR technique for preliminary studies of energy transfer events under near single collision conditions, radical-radical reactions, and laser-initiated chain reaction processes.

• Research Organization: Colorado Univ., Boulder, CO (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-88ER13860
• OSTI ID: 6658722
• Report Number(s): DOE/ER/13860-3; ON: DE90017223
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACETONE
ACETYLENE
ALKANES
ALKENES
ALKYNES
AMMONIA
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMBUSTION
DISSOCIATION
DOCUMENT TYPES
EMISSION SPECTRA
ENERGY LEVELS
ENERGY TRANSFER
ETHANE
ETHYLENE
EXCIMER LASERS
EXCITED STATES
FOURIER TRANSFORMATION
FRAGMENTATION
GAS LASERS
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INTEGRAL TRANSFORMATIONS
KETONES
LASERS
MEASURING METHODS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
OXIDATION
PROGRESS REPORT
RADICALS
RESOLUTION
ROTATIONAL STATES
SPECTRA
THERMOCHEMICAL PROCESSES
TIME RESOLUTION
TIMING PROPERTIES
TRANSFORMATIONS
VIBRATIONAL STATES