The transient absorption spectrum of the coordinatively unsaturated trinuclear osmium carbonyl cluster Os3(CO)11 adsorbed on the surface of silica was observed for the first time by the ps time-resolved diffuse reflectance laser photolysis of Os3(CO)12. The present results demonstrated that Os3(CO)11 is the photoprimary product responsible for the net oxidative addition of surface hydroxyls to Os3(CO)12 adsorbed on the surface of silica to form the surface attached trinuclear species HOs3(CO)10-OSi. It was revealed that the addition of surface hydroxyls to Os3(CO)11 is completed within the time of our instrumental response (≤35 ps), which is comparable to the coordination of solvent to coordinatively unsaturated metal carbonyls.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry