作者:Bruno Ameduri、Bernard Boutevin、Joël J.E Moreau、Hicham Moutaabbid、Michel Wong Chi Man
DOI:10.1016/s0022-1139(00)00211-6
日期:2000.7
Perfluoroalkyltrialkoxysilanes were prepared by hydrosilylation of the allylic or vinylic derivatives with trialkoxysilane or with trichlorosilane (followed by a quantitative methanolysis). The hydrolysis and polycondensation of these precursors were performed in the presence of tetrabutylammoniumfluoride (TBAF) as the catalyst, leading to a series of new polysilsesquioxanes, which were characterized by solid state C-13 and Si-29 CPMAS NMR. The porosity and surface area of these materials were determined by N-2 absorption experiments. Thermogravimetric analyses (TGA) were also performed. The surface properties of films prepared from these silsesquioxanes were studied by contact angle measurements. The hybrids having fluoroalkyl groups at the surface of the material showed a better thermostability and a higher hydrophobic and oleophobic character than their hydrocarbon analogues. (C) 2000 Elsevier Science S.A. All rights reserved.
Preparation of branched siloxane
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP1510520B1
公开(公告)日:2006-07-26
An Easily Accessed Nickel Nanoparticle Catalyst for Alkene Hydrosilylation with Tertiary Silanes
作者:Ivan Buslov、Fang Song、Xile Hu
DOI:10.1002/anie.201606832
日期:2016.9.26
non‐precious nanoparticlecatalyst for alkenehydrosilylation with commercially relevant tertiarysilanes has been developed. The nickelnanoparticlecatalyst was prepared in situ from a simple nickel alkoxide precatalyst Ni(OtBu)2⋅x KCl. The catalyst exhibits high activity for anti‐Markovnikov hydrosilylation of unactivated terminal alkenes and isomerizing hydrosilylation of internal alkenes. The catalyst