A novel star polymer with P-cyclodextrin (beta-CD) core and polyacrylonitrile arms and its metal complexes (Cu2+, Zn2+, and Ag+) were synthesized and characterized by means of infrared spectra, ultraviolet, GPC, X-ray photoelectron spectroscopy, differential scanning calorimetry, cyclic voltammetry, and electron spin resonance. The results indicate that the monomers of acrylonitrile were initiated by functionalized beta-CD. The thermal properties of star polymer were improved greatly after transitional metal ions were introduced into it. The novel star polymer metal complexes possess properties of metal ions, polymer, and beta-CD. Furthermore, it shows stable electrochemical activity. (c) 2007 Wiley Periodicals, Inc.