Femtochemistry at high pressures. Solvent effect in the gas-to-liquid transition region
We report new studies on the effect of solvent on the femtosecond dynamics of the dissociation and recombination of iodine in the gas-to-liquid transition region. The pressure of the solvent (helium, neon, argon and krypton) spans the range from 0 to 2500 bar, corresponding to solvent densities from the ideal gas-phase limit to the liquid-like fluid regime. The reactive cross section and the dynamics of the collision of the fragments with the solvent and with each other are discussed in relation to the solvent polarizability and the structure of the solvent cage.
© 1994 Elsevier Science B.V. Received 22 March 1994. This work was supported by the National Science Foundation. Ch L gratefully acknowledges a postdoctoral fellowship by the Deutsche Forschungsgemeinschaft. We wish to thank Mr. Christopher Hyland for his help and discussions throughout this work.