A comparison of the infrared multiphoton dissociation of C3H5C(CH3)3 and C3H5Ge(CH3)3

G.P. Zhitneva

Chemical Physics Letters, v. 307, p. 379-384 (1999)

ABSTRACT. The CO2 laser-induced multiphoton dissociation (MPD) of C3H5X(CH3)3 molecules (X = C or Ge) in the gas phase was studied. Average energies absorbed by these molecules at the dissociation threshold (E) were determined. It was found that E for molecules with C is higher than that for Ge-containing molecules. It was shown that shortening of laser pulse (under the constant laser energy) decreases E only for molecules with atom Ge. The dependence of fragmentation probability of X(CH3)3, formed from MPD of C3H5X(CH3)3, on the laser fluence was found to be different for molecules with C or Ge. The distinctions in MPD of these molecules can be attributed to the atom effect on the vibrational energy transfer over the molecule.

Laboratory of Catalysis and Gas Electrochemistry