Can. J. Chem., 82, 595-607 (2004)

Telechelic polycaprolactones with tethered mixed ligand ruthenium(II) polypyridyl chromophores

A. A. Farah and W. J. Pietro

Department of Chemistry, York University, 4700 Keele St., Toronto, Ontario, Canada, M3J 1P3

Well-characterized templates of polymer forming ligands and their ruthenium tris (a,a¢-diimine) initiators were utilized to divergently ring open a e-caprolactone monomer. The same polymers were also obtained through the synthesis of quinoline and bipyridine diimine ligands incorporating poly(e-caprolactone) (PCL) chains. These polymers contain vacant molecular recognition sites enabling subsequent chelation of these macroligands to metal precursors. Both methods provided telechelic (e-caprolactone) ruthenium(II)-centered polyesters of various hierarchy. Solution properties and thermal behaviour of such polyesters are described.