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Synthesis of a star‐shaped polymer via coordination of ester‐linked pyridyl‐terminated poly(oxyethylene) with ru(II)
Author(s) -
Naka Kensuke,
Kobayashi Akiko,
Chujo Yoshiki
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030181205
Subject(s) - substituent , polymer chemistry , prepolymer , polymer , gel permeation chromatography , star polymer , pyridine , ligand (biochemistry) , materials science , metal , chemistry , copolymer , stereochemistry , organic chemistry , polyurethane , biochemistry , receptor
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) ( M̄ n = 2000) with a Ru 5 Cl 12 2− 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.