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

Journal Article · Thu Jan 07 00:00:00 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), Vol. 86:1
• Country of Publication: United States
• Language: English

Related Subjects

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