Sensitization of TiO2 by phosphonate-derivatized proline assemblies

Authors
Trammell, SA Moss, JA Yang, JC Nakhle, BM Slate, CA Odobel, F Sykora, M Erickson, BW Meyer, TJ
Citation
Sa. Trammell et al., Sensitization of TiO2 by phosphonate-derivatized proline assemblies, INORG CHEM, 38(16), 1999, pp. 3665-3669
Citations number
24
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
INORGANIC CHEMISTRY
ISSN journal
00201669 → ACNP
Volume
38
Issue
16
Year of publication
1999
Pages
3665 - 3669
Database
ISI
SICI code
0020-1669(19990809)38:16<3665:SOTBPP>2.0.ZU;2-I
Abstract
Surface electrochemical and photoelectrochemical measurements on ITO (In2O3 :Sn) or TiO2 of two proline assemblies are reported. Surface coverage on IT O of Pbp-pra(Ru(II)b(2)m)-OH(PF6)(2) and Bpb-pra(Ru(II)b(2)m)-OCH3(CF3CO2)( 2) are (1.5-2.4) x 10(-10) mol/cm(2), comparable to monolayer coverages of (1.5-2.5) x 10(-10) mol/cm2 for [Ru(bpy)(2)(4,4'-(CO2H)(2)bpy)](PF6)(2) and [Ru(bpy)(2)(4,4'-(PO3H2)(2)bpy)](Br)(2). Incident photon-to-current conver sion efficiency (IPCE) measured in Graztel-type photovoltaic cells are sens itive to subtle structural differences in the assemblies. IPCE values for P bp-pra(Ru(II)b(2)m)-OH(PF6)(2) and Bpb-pra(Ru(II)b(2)m)-OCH3(CF3CO2)(2) are 2% and <0.1%, which are compared to 23% for both [Ru(bpy)(2)(4,4'-(PO3H2)( 2)bpy)](Br)(2) and [Ru(bpy)(2)(4,4'-(CO2H)(2)bpy)](PF6)(2) under the same c onditions.