Melissa D'Souza and Harry D. Gafney. The City University of New York - Queens College, Flushing, NY
Porous Vycor Glass (PVG) impregnated with WO3 photocatalyzes the conversion of CO2 to CH4, but requires ultraviolet light. One avenue of investigation in our laboratories focuses on assembling multicomponent sites within the glass matrix capable of driving this eight-electron reduction with visible light. To this end, we have begun to explore the synthesis of polymetallic complexes that can serve as �molecular delivery systems�. The simplest system is a bimetallic molecule composed of a Ru(II) diimine, that acts as a photoactivated electron transfer reagent, and the catalyst, WO3. The inability to bind the oxide to the diimine, however, precludes a straightforward reaction. These experiments focus on the synthesis of the bimetallic complex [(bpy)2RudppW(CO)4]2+ (dpp = 2,3-bis(2-pyridyl)pyrazine), where dpp serves as the electronic bridging ligand that binds these metals together. This presentation descibes the synthesis of W(CO)4dpp and its reaction with (bpy)2RuCl2.
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