Journal
INORGANIC CHEMISTRY
Volume 53, Issue 4, Pages 2083-2095Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic402702z
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Funding
- Fonds der Chemischen Industrie
- Carl Zeiss foundation
- Canadian Natural Science and Engineering Research Council
- Canadian Foundation for Innovation
- Alfred P. Sloan Foundation
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A series of heteroleptic bis(tridentate) ruthenium(II) complexes bearing ligands featuring 1,2,3-triazolide and 1,2,3-triazolylidene units are presented. The synthesis of the (CNN)-N-boolean AND-N-boolean AND-coordinated ruthenium(II) triazolide complex is achieved by direct C H activation, which is enabled by the use of a 1,5-disubstituted triazole. By postcomplexation alkylation, the ruthenium(II) 1,2,3-triazolide complex can be converted to the corresponding 1,2,3-triazolylidene complex. Additionally, a ruthenium(II) complex featuring a (CNC)-N-boolean AND-C-boolean AND-coordinating bis(1,2,3-triazolylidene)pyridine ligand is prepared via transmetalation from a silver(I) triazolylidene precursor. The electronic consequences of the carbanion and mesoionic carbene donors are studied both experimentally and computationally. The presented complexes exhibit a broad absorption in the visible region as well as long lifetimes of the charge-separated excited state suggesting their application in photoredox catalysis and photovoltaics. Testing of the dyes in a conventional dye-sensitized solar cell (DSSC) generates, however, only modest power conversion efficiencies (PCEs).
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