title: Synthesis and characterization of poly(alkoxysilane)s catalyzed by Co/Ni colloidal nanoparticles.
abstract: Si-Si/Si-O dehydrocoupling of hydrosilanes with alcohols (1:1.5 mole ratio), catalyzed by group VIII metallocenes Cp2M' (M' = Co, Ni) which converted to Co(O)/nickel(O) colloidal nanoparticles, produced poly(alkoxysilane)s in one-pot in high yield. The hydrosilanes include p-X-C6H4SiH3 (X = H, CH3, OCH3, F), PhCH2SiH3, and (PhSiH2)2. The alcohols include MeOH, EtOH, 'PrOH, PhOH, and CF3(CF2)2CH2OH. The weight average molecular weight of the poly(alkoxysilane)s were in the range of 600 to 8100. The dehydrocoupling reactions of phenylsilane with ethanol (1:3 mole ratio) in the presence of the nanocolloid catalyst gave only triethoxyphenylsilane as product.
authors.affiliation: Alan G. MacDiarmid Energy Research Institute (AMERI) and Nanotechnology Research Center (NTRC), and Department of Chemistry, Chonnam National University, Gwangju 500-757, Korea.
authors.forename: Myoung-Hee
authors.initials: MH
authors.lastname: Kim
authors.forename: Hee-Gweon
authors.initials: HG
authors.lastname: Woo
authors.forename: Do-Heyoung
authors.initials: DH
authors.lastname: Kim
authors.forename: Kap-Seung
authors.initials: KS
authors.lastname: Yang
authors.forename: Bo-Hye
authors.initials: BH
authors.lastname: Kim
authors.forename: Young Chun
authors.initials: YC
authors.lastname: Ko
authors.forename: Honglae
authors.initials: H
authors.lastname: Sohn