Complexhyphen;forming reactions in neutral noble gas clusters

摘要

The complexhyphen;forming reaction between CH3F and HCl imbedded in mediumndash;large argon clusters has been monitored using molecular beam infrared spectroscopy. A lsquo;lsquo;pickuprsquo;rsquo; technique has been used which consists of exposing the (CH3F)mArnclusters, formed by expansion of a dilute mixture of CH3F in Ar from a supersonic nozzle, to a cross flux of HCl molecules. The clusters are characterized, with and without the reactant flow, by bolometric photoevaporation IR spectroscopy using line tunable CO2lasers. Our data show that the products can be clearly distinguished from the reactant species. A plot of reactivity vs nozzle pressure, which is directly related to cluster size, indicates that, within our range of measurements, the HCl diffusion into the clusters is completed in less than 100 mgr;s.