Coordination Chemistry Laboratory, Department of Chemistry, Graduate School of Science, Osakauniversity
Development of S-Bridged Polynuclear Complexes
We have been interested in the development of sulfur-bridged polynuclear complexes with various thiolate ligands, which exhibit unique molecular structures, electronic states, and chemical properties. For example, We prepared chiral and emissive IrIII mononuclear complex composed of bis(phenylpyridinato)-type Iridium(III) unit and D-penicillamine. The mononuclear complex were converted into S-bridged IrIIIAgIIrIII trinuclear complexes by linking with AgI.
Remarlably, we found that two diastereomers of the trinuclear complex (ΔDΔD isomer and ΛDΛD isomer) showed markedly different the emission quantum efficiencies each other.
We have been interested in the development of sulfur-bridged polynuclear complexes with various thiolate ligands, which exhibit unique molecular structures, electronic states, and chemical properties.
We have found that the reaction of [Ru(solvent)2(bpy)2]2+ (bpy = 2,2'-bipyridine) with Haet (2-aminoethanethiol) results in the formation of a RuIIRuII dinuclear complex, in which two [Ru(bpy)2]2+ moieties are bridged by two S atoms. Conversely, a thiolato-bridged RuIIAgIRuII trinuclear complex consisting of two [Ru(aet)(bpy)2]+ units was produced when a similar reaction was carried out in the presence of Ag+. It was found that this RuIIAgIRuII trinuclear complex can be reversibly converted into a rare single-disulfide-bridged RuIIRuII dinuclear complex.