One-Pot Synthesis and Characterization of a Chromophore−Donor−Acceptor Assembly
- 17 December 1999
- journal article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 39 (1), 71-75
- https://doi.org/10.1021/ic990512i
Abstract
The acid-functionalized tris-heteroleptic chromophore−donor−acceptor assembly [RuII(bpyCOOH)(bpyCH2PTZ)(bpyCH2MV2+)](PF6)4]4+ (1) (bpyCOOH = 4‘-methyl-2,2‘-bipyridine-4-carboxylic acid; bpyCH2PTZ = 10-((4‘-methyl-2,2‘-bipyridin-4-yl)methyl)phenothiazine; bpyCH2MV2+ = 1-((4‘-methyl-2,2‘-bipyridin-4-yl)methyl)-1‘-methyl-4,4‘-bipyridinediium) was synthesized in a one-pot reaction by careful selection of the order of ligand addition to RuCl2(DMSO)4 (DMSO = dimethyl sulfoxide). The success of this method was based upon separation and isolation of 1 from mixtures containing ligand-scrambled products by cation exchange chromatography. Metal-to-ligand charge-transfer (MLCT) excitation in acetonitrile at 464 nm was followed by intramolecular electron transfer to give a redox-separated state [RuII(bpyCOOH)(bpyCH2PTZ•+)(bpyCH2MV•+)]4+ with an efficiency of ηRS = 0.35 ± 0.05.Keywords
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