Gaseous Photodissociation Deposition Kinetics of Ultraviolet Photolysis of Mn₂（CO）₁₀

Using QCM technique, the kinetics of gaseous photodissociation deposition of Mn₂（CO）₁₀ induced by 254nm UV light is studied. The linear dependence of the photodissociation deposition rate on the number of original Mn₂（CO）₁₀ molecules has been obtained, which conforms to rules of gaseous molecule single-photon dissociation rate equation. The gaseous molecule single-photon dissociation is the rate-determining step in ultraviolet photolysis of Mn₂（CO）₁₀ deposition. Mn₂（CO）₁₀ photodissociates into manganese carbonyl with lower number of coordination and deposits on the surface of gold plated quartz crystal. The effect of the vapor pressure of Mn₂（CO）₁₀ and added gases （O₂,CO,N₂ and Ar） has also been studied, the result shows that the deposition rate varies obviously with increasing the pressure of the added gases.