title: One-pot synthesis and structural characterization of poly(alkoxysilane)s catalyzed by silver-gold complexes.
abstract: Combinative one-pot Si-Si/Si-O dehydrocoupling of hydrosilanes with alcohols (1:1.5 mole ratio), mediated by a mixture of AgNO3-AuCl3 (100/1 mole ratio) rapidly produced poly(alkoxysilane)s in reasonably high yield. The addition of small amount of gold complex to the reaction mixture effectively accelerated the coupling reaction compared to the reaction rate with AgNO3 alone. The hydrosilanes include p-X-C6H4SiH3 (X = H, CH3, OCH3, F), PhCH2SiH3, and (PhSiH2)2. The alcohols include MeOH, EtOH, iPrOH, PhOH, and CF3(CF2)2CH2OH. The weight average molecular weight and polydispersity of the poly(alkoxysilane)s were in the range of 1,600-8,000 Dalton and 1.4-3.5, respectively. The dehydrocoupling reactions of phenylsilane with ethanol (1:3 mole ratio) in the presence of the Ag-Au complexes gave only triethoxyphenylsilane.
authors: Department of Biotechnology, Chosun University, Gwangju 501-759, Korea.
authors: Hyeonsook
authors: H
authors: Cheong
authors: Sung-Hee
authors: SH
authors: Roh
authors: Myong-Shik
authors: MS
authors: Cho
authors: Myoung-Hee
authors: MH
authors: Kim
authors: Hee-Gweon
authors: HG
authors: Woo
authors: Kap-Seung
authors: KS
authors: Yang
authors: Bo-Hye
authors: BH
authors: Kim
authors: Jin
authors: J
authors: Jun
authors: Honglae
authors: H
authors: Sohn
mesh_terms: D000438:Alcohols / Q000737:chemistry*; D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012821:Silanes / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000438:Alcohols; D046911:Macromolecular Substances; D012821:Silanes; C059688:alkoxyl radical; D012834:Silver; D006046:Gold