| Research Abstract |
Self-assembled multinuclear metal complexes utilizing coordination bonds draw much attention, especially host-guest chemistry of the self-assembled macrocyclic multi-nuclear complexes having a hydrophobic cavity, which can include a organic molecule, are studies extensively. Our goal is to prepare the macrocyclic multinuclear ruthenium complexes by self-assembly, especially having ability to include the substrate and containing the active metal site, which are considered as the model of metal enzymes. Syntheses of the macrocyclic tetranuclear complexes containing two ruthenium and two palladium or platinum ions have been tried. The Ru2Pd2 macrocyclic complex containing the ruthenium unit, which showed catalytic ability on oxidation of alkanes, was synthesized
In general, metal complexes with cis-coordinated bridging ligands are employed in the syntheses of macrocyclic complexes, however, the active site of the catalytic center is far away from the included substrate, when the metal complex having catalytic ability is involved in these macrocyclic complexes. The novel Ru2Pt2 macrocyclic complex containing ruthenium unit with transcoordinated bridging ligands was newly designed to overcome this defect and was synthesized.
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