Sensitization of TiO2 by Phosphonate-Derivatized Proline Assemblies

Sensitization of TiO2 by Phosphonate-Derivatized Proline Assemblies

Surface electrochemical and photoelectrochemical measurements on ITO (In2O3:Sn) or TiO2 of two proline assemblies are reported. Surface coverage on ITO of Pbp-pra(RuIIb2m)-OH(PF6)2 and Bpb-pra(RuIIb2m)-OCH3(CF3CO2)2 are (1.5−2.4) × 10-10 mol/cm2, comparable to monolayer coverages of (1.5−2.5) × 10-1...

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Veröffentlicht in:Inorganic chemistry 1999-08, Vol.38 (16), p.3665-3669
Hauptverfasser: Trammell, Scott A, Moss, John A, Yang, John C, Nakhle, Bassam M, Slate, Cheryl A, Odobel, Fabrice, Sykora, Milan, Erickson, Bruce W, Meyer, Thomas J
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Sprache:eng
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Zusammenfassung:Surface electrochemical and photoelectrochemical measurements on ITO (In2O3:Sn) or TiO2 of two proline assemblies are reported. Surface coverage on ITO of Pbp-pra(RuIIb2m)-OH(PF6)2 and Bpb-pra(RuIIb2m)-OCH3(CF3CO2)2 are (1.5−2.4) × 10-10 mol/cm2, comparable to monolayer coverages of (1.5−2.5) × 10-10 mol/cm2 for [Ru(bpy)2(4,4‘-(CO2H)2bpy)](PF6)2 and [Ru(bpy)2(4,4‘-(PO3H2)2bpy)](Br)2. Incident photon-to-current conversion efficiency (IPCE) measured in Gräztel-type photovoltaic cells are sensitive to subtle structural differences in the assemblies. IPCE values for Pbp-pra(RuIIb2m)-OH(PF6)2 and Bpb-pra(RuIIb2m)-OCH3(CF3CO2)2 are 2% and
ISSN:0020-1669
1520-510X
DOI:10.1021/ic990052t