Design of antenna-sensitizer polynuclear complexes. Sensitization of titanium dioxide with [Ru(bpy)2(CN)2]2Ru(bpy(COO)2)22

Autor: R. Amadelli, Roberto Argazzi, Franco Scandola, Carlo Alberto Bignozzi
Rok vydání: 1990
Předmět:
Zdroj: Journal of the American Chemical Society. 112:7099-7103
ISSN: 1520-5126
0002-7863
DOI: 10.1021/ja00176a003
Popis: The use of antenna-sensitizer molecular devices is proposed as a possible strategy to increase the light harvesting efficiency of sensitized semiconductors. To illustrate this approach, the cyano-bridged trinuclear complex (Ru(bpy){sub 2}(CN){sub 2}){sub 2}Ru(bpy(COO){sub 2}){sub 2}{sup 2{minus}} has been synthesized and studied. The complex adsorbs on TiO{sub 2} via the negativity charged-Ru(bpy(COO){sub 2}){sub 2}-central unit. The photophysical behavior in solution and the photoelectrochemical behavior on TiO{sub 2} have been studied. Emission and excitation spectra show that in this complex the light energy absorbed by the terminal Ru(bpy){sub 2}(CN){sub 2} (antenna) groups is efficiently funneled to the central-Ru(bpy(COO){sub 2}){sub 2}-(sensitizer) fragment. Photochemical spectra on TiO{sub 2} demonstrate that the light absorbed by the antenna fragments is efficiently used for sensitization of the semiconductor.
Databáze: OpenAIRE
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