Pure Appl. Chem., 2006, Vol. 78, No. 7, pp. 1407-1411
doi:10.1351/pac200678071407
Synthesis of transition-metal-containing poly(pyrazabole)s*
Fukashi Matsumoto and Yoshiki Chujo
Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
Abstract:
Novel organoboron polymers containing transition metals (Ni, Pd, Pt) and pyrazaboles in the main chain were prepared by Cu-catalyzed coupling polymerization. The Ni- and Pt-containing polymers showed MLCT (metal-to-ligand charge transfer) absorption, whereas the Pd-containing polymer did not demonstrate the absorption. Only the Pd-containing polymer exhibited the emission spectrum with a vibronic structure. These differences in the optical properties were studied in detail.
Keywords: Heck-Sonogashira coupling; optical properties; organoboron polymers; pyrazaboles; transition metals.