Infrared multiphoton dissociation in two-channel systems. Pulse-duration effects

Journal Article · Thu Jan 07 04:00:00 EST 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100390a009· OSTI ID:5193051

Brenner, D M

Both ethyl vinyl ether (EVE) and dihydrofuran (DHF) dissociate by two reaction channels which differ by approx.25 kcal mol/sup -1/ in activation energies. In DHF, the branching ratio between these channels produced by IR-multiphoton-induced dissociation shows no power dependence, by contrast to previous work with EVE. In view of the similarity of the Arrhenius activation parameters in the two systems, this is surprising. Therefore, a comparison of the peak-power dependence of the branching ratio in the two systems has been studied at h..nu..CO/sub 2/ = 1076 cm/sup -1/ where the average energy absorbed is the same in both molecules. Results on the power dependence of branching ratio and yield suggest that differences in absorption coefficients (pumping rates) in the quasicontinuum may account for the differences in power dependence.

• Research Organization: Brookhaven National Lab., Upton, NY
• OSTI ID: 5193051
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:1; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ABSORPTION
ACTIVATION ENERGY
BRANCHING RATIO
COLLISIONS
DATA
DISSOCIATION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY
ETHERS
ETHYL ETHER
EXPERIMENTAL DATA
FURANS
HETEROCYCLIC COMPOUNDS
INFORMATION
INFRARED RADIATION
KINETICS
MASSLESS PARTICLES
MOLECULE COLLISIONS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOTON COLLISIONS
PHOTON-MOLECULE COLLISIONS
PHOTONS
PULSES
RADIATIONS
REACTION KINETICS