Synthesis and characterization of poly(alkoxysilane)s catalyzed by Co/Ni colloidal nanoparticles.
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.
Kim
Myoung-Hee
MH
Alan G. MacDiarmid Energy Research Institute (AMERI) and Nanotechnology Research Center (NTRC), and Department of Chemistry, Chonnam National University, Gwangju 500-757, Korea.
Woo
Hee-Gweon
HG
Kim
Do-Heyoung
DH
Yang
Kap-Seung
KS
Kim
Bo-Hye
BH
Ko
Young Chun
YC
Sohn
Honglae
H