Neutral Metal Cluster Formation and Oxidation Reactions in the Photolysis of Iron Carbonyl van der Walls Complexes

摘要

Iron pentacarbonyl, van der Waals complexes and mixed complexes containing iron pentacarbonyl and oxygen, carbon dioxide, or water are produced in pulsed supersonic expansions and probed with ultraviolet multiphoton ionization time-of-flight mass spectroscopy. Photochemical rearrangement and oxidation reactions occur within these complexes prior to photoionization, resulting in the formation of neutral iron clusters, iron cluster carbonyls, and iron cluster monoxides. Two laser time-delayed experiments, as well as excimer laser wavelength and power dependences, are used to probe the mechanism of this fascinating photoinduced chemistry, which occurs in cluster species containing 1-25 iron atoms.