Lm. Goss et al., PHOTOOXIDATION OF CS2 IN THE NEAR-ULTRAVIOLET AND ITS ATMOSPHERIC IMPLICATIONS, Geophysical research letters, 22(19), 1995, pp. 2609-2612
Sequential two photon photolysis of CS2 is discussed. Experiments in o
ur lab and others have shown that photolysis of CS2 and O-2 mixtures w
ith light of energies below the SC-S bond dissociation energy produces
OCS and SO2. We explain these results by the two photon sequential ab
sorption and subsequent dissociation of CS2 to CS+S. The implications
of this mechanism for the oxidation of CS2 in the atmosphere are discu
ssed. Comparison to the currently accepted OH-initiated oxidation mech
anism suggests that the sequential two-photon mechanism is too slow to
be important in the atmosphere.