Excitation spectrum of the chemical reaction F2+O2in the red spectral range

摘要

A search has been made for new, lowhyphen;energy pathways of the reaction F2+O2rarr;O2F+F or O2F2through excitation of F2or O2in an oxygen matrix with red and near infrared photons. By monitoring the product yield as a function of laser irradiation frequency, a reaction excitation spectrum of O2+F2was recorded which begins at 14thinsp;500 cmminus;1and extends through the entire red spectral range. It revealed two discrete absorptions O2thinsp;1Sgr;+g,vprime;=1larr;3Sgr;minus;g,vPrime;=0 and (O2)2(1Dgr;g,1Dgr;g)0,0 larr;(3Sgr;minus;g,3Sgr;minus;g)0,0, and a continuous, oxygenhyphen;enhanced absorption of F2which is assigned to excitation to the repulsive part of the weakly bound3Pgr;0u+state. The F2absorption detected in this experiment extends more than 200 nm to longer wavelengths than any electronic absorption of molecular fluorine reported so far.