Highly-active, graphene-supported platinum catalyst for the solventless hydrosilylation of olefins
作者:Caleb J. Kong、Stanley E. Gilliland、Brian R. Clark、B. Frank Gupton
DOI:10.1039/c8cc07641c
日期:——
report the development of the first graphene-supported platinumcatalyst that has demonstrated exceptional catalytic activity and stability for hydrosilylation reactions of olefins (TOF 4.8 × 106 h−1, TON = 9.4 × 106). The catalyst also exhibited functional group tolerance over a broad range of industrially relevant substrates with minimal metal leaching. In addition, the catalystsystem was successfully
本文中,我们报道了第一个石墨烯负载的铂催化剂的开发,该催化剂已证明对烯烃的氢化硅烷化反应具有出色的催化活性和稳定性(TOF 4.8×10 6 h -1,TON = 9.4×10 6)。该催化剂还具有广泛的工业相关底物,并且具有最少的金属浸出,对官能团具有耐受性。此外,该催化剂体系已成功转化为用于连续氢化硅烷化反应的填充床平台。
A Pt(0) complex with cyclic (alkyl)(amino)silylene and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane ligands: synthesis, molecular structure, and catalytic hydrosilylation activity
A platinum(0) complex bearing a cyclic (alkyl)(amino)silylene and a 1,3-divinyl-1,1,3,3-tetramethyldisiloxane (DVTMS) was synthesized and isolated in the form of colorless crystals. The single-crystal X-ray diffraction analysis of this complex in combination with theoretical calculations indicated that the Pt→Si π-back-donation in this complex is weaker than that in the corresponding cyclic-dialkylsilylene-ligated
Accelerated Anti‐Markovnikov Alkene Hydrosilylation with Humic‐Acid‐Supported Electron‐Deficient Platinum Single Atoms
作者:Kairui Liu、Bolortuya Badamdorj、Fan Yang、Michael J. Janik、Markus Antonietti
DOI:10.1002/anie.202109689
日期:2021.11.2
A humic-acid-based carbonaceous support material AHA_U_400 was prepared through mild thermal condensation and cross-linking between artificial humic acid and urea, and the material proved to enable the preparation of the stable Pt single-atom catalyst (Pt1@AHA_U_400). Pt was coordinated to two unsaturated O atoms, as well as one Cl− and one HCl moiety.
通过人工腐植酸和尿素之间的温和热缩合和交联制备了腐植酸基碳质载体材料AHA_U_400,该材料被证明能够制备稳定的Pt单原子催化剂(Pt 1 @AHA_U_400)。Pt 与两个不饱和 O 原子以及一个 Cl -和一个 HCl 部分配位。
[EN] (METH)ACRYLOXY-CONTAINING TRISILOXANE, SILOXANE-CONTAINING POLYMERS AND BIOMEDICAL DEVICES THEREFROM<br/>[FR] TRISILOXANE CONTENANT UN (MÉTH)ACRYLOXY, POLYMÈRES CONTENANT UN SILOXANE ET DISPOSITIFS BIOMÉDICAUX LES CONTENANT
申请人:MOMENTIVE PERFORMANCE MAT INC
公开号:WO2014123956A1
公开(公告)日:2014-08-14
There is provided a trisiloxane having a 3-(meth)acryloxy-substituted (hydroxylcyclohexyl)ethyl group, useful in making water absorbing silicone-hydrogel films for biomedical devices, such as contact lens, and a process for producing these monomers. This invention also provides for copolymers made from the trisiloxane having a 3-(meth)acryloxy-substituted (hydroxylcyclohexyl)ethyl group described herein.
[EN] OXYGEN PERMEABLE HYDROUS CONTACT LENS AND COMPOSITION THEREFOR<br/>[FR] LENTILLE DE CONTACT HYDRATÉE PERMÉABLE À L'OXYGÈNE ET COMPOSITION ASSOCIÉE
申请人:SEED CO LTD
公开号:WO2014123959A1
公开(公告)日:2014-08-14
The present invention relates to a composition and an oxygen permeable hydrous contact lens made therefrom. More particularly, the present invention relates to a composition for an oxygen permeable hydrous contact lens comprising a monomer intramolecularly having silicon-containing moieties, at least one hydrophilic group, a cyclic hydrocarbon group, and an acryloyloxy or methacryloyloxy group; a hydrophilic monomer; and a second silicon-containing monomer, as well as to an oxygen permeable hydrous contact lens obtained from the composition.