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Design and Development of Functionalized Cyclometalated Ruthenium Chromophores for Light-Harvesting Applications

TitleDesign and Development of Functionalized Cyclometalated Ruthenium Chromophores for Light-Harvesting Applications
Publication TypeJournal Article
Year of Publication2011
AuthorsRobson, KCD, Koivisto, BD, Yella, A, Sporinova, B, Nazeeruddin, MK, Baumgartner, T, Graetzel, M, Berlinguette, CP
JournalINORGANIC CHEMISTRY
Volume50
Pagination5494-5508
Date PublishedJUN 20
ISSN0020-1669
Abstract

{The syntheses and the electrochemical spectroscopic properties of a suite of asymmetrical bistridentate cyclometalated Ru(II) complexes bearing terminal triphenylamine (TPA) substituents are reported. These complexes, which contain structural design elements common to both inorganic and organic dyes that exhibit superior power conversion efficiencies in the dye-sensitized solar cell (DSSC), are broadly formulated as {[}Ru-II(L-2,5'-thiophene-TPA-R-1)(L-R-2)](+) {[}L = tridentate chelating ligand (e.g., 2,2':6',2 `'-terpyridine (tpy); deprotonated forms of 1,3-di(pyridin-2-yl)benzene (Hdpb) or 6-phenyl-2,2'-bipyridine (Hpbpy)); R-1 = -H, -Me, -OMe; R-2 = -H, -CO2Me, -CO2H]. The following structural attributes were systematically modified for the series: (i) electron-donating character of the terminal substituents (e.g.

DOI10.1021/ic200011m