Synthesis of a star‐shaped polymer via coordination of ester‐linked pyridyl‐terminated poly(oxyethylene) with ru(II)

The star‐shaped polymer with trans‐tetrapyridyl complex of Ru(II) as a core was prepared by complexation of ester‐linked pyridyl‐terminated poly(oxyethylene) (M̄n = 2000) with a Ru5Cl122− cluster. The unimodal peak of the star‐shaped polymer in the gel‐permeation chromatogram was shifted to a higher molecular weight region than that of the starting prepolymer. The electron‐withdrawing ester substituent in para position of the pyridine ring shifted the metal‐to‐ligand charge transfer (MLCT) band into the visible region.