Diruthenium compounds of thiol capped oligo(phenyleneethynyl) ligand: Synthesis and characterization

Reactions between Ru2(DMBA)4(NO3)2 and OPEn-S-TMSE ligand under weak base conditions afford trans-Ru2(DMBA)4(OPEn-S-TMSE)2 compounds, where DMBA is N,N′-dimethylbenzamidinate, TMSE is trimethylsilylethylene, and OPEn are –CCC6H4– (1), –CC(2,5-(CH3O)2C6H2)–(CCC6H4)– (2) and –(CCC6H4)–CC(2,5-(CH3O)2C6H2)–(CCC6H4)– (3). Molecular structures of compounds 1 and 2 were determined by X-ray diffraction, which revealed the extended rigid rod topology and coplanarity of phenyleneethynye units in 1 and 2. Electrochemical and optical energy gaps of compounds 1–3 were estimated to be 1.57 eV and ca. 1.43 eV, respectively, from voltammetric and absorption spectral measurements.

Graphical abstractReported herein are the synthesis, electrochemical and structural characterization of Ru2(DMBA)4(OPEn-S-TMSE)2 compounds.Figure optionsDownload full-size imageDownload as PowerPoint slide