Abstract
Lasers have been extensively used in recent years to induce gas-surface photochemistry. There exist, however, relatively few mechanistic studies on well characterized surfaces involving electronic excitation of adsorbed molecules. We have recently investigated the electronic excitation effect of CH2I2 molecules adsorbed on a sapphire crystal and silver surfaces with a XeCl laser. The molecule is chosen because it is readily activated by the 308 nm light pulses into its first and antibonding state. The excited molecules can dissociate into CH2I radicals and I atoms with a unit quantum yield in the gas phase.
© 1987 Optical Society of America
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