离子液体 (IL) 已广泛用于过渡金属催化过程,但 IL 和催化剂在这些反应中的确切行为尚不清楚。在此,通过1 H NMR 和基于 CO 2催化氢化的晶体学表征,揭示了 IL 的作用以及 Shvo 催化剂与 IL 之间的相互作用模式。ILs 促进 Shvo 催化剂的解离并提高 CO 的生产率。产生的 CO 随后用于烯烃的串联加氢甲酰化还原以生产有价值的醇。在没有 ILs 的情况下,甲酰胺可以通过大多数伯胺或仲胺的N-甲酰化获得。
PALLADIUM CATALYST SYSTEM COMPRISING ZWITTERION AND/OR ACID-FUNCTIONALYZED IONIC LIQUID
申请人:Riisager Anders
公开号:US20110065950A1
公开(公告)日:2011-03-17
The present invention concerns a catalyst system in particular a catalyst system comprising Palladium (Pd), a zwitterion and/or an acid-functionalized ionic liquid, and one or more phosphine ligands, wherein the Pd catalyst can be provided by a complex precursor, such as Pd(CH
3
COO)
2
, PdCl
2
, Pd(CH
3
COCHCOCH
3
), Pd(CF
3
COO)
2
, Pd(PPh
3
)
4
or Pd
2
(dibenzylideneacetone)
3
. Such catalyst systems can be used for e.g. alkoxycarbonylation reactions, carboxylation reactions, and/or in a co-polymerization reaction, e.g. in the production of methyl propionate and/or propanoic acid, optionally in processes forming methyl methacrylate and/or methacrylic acid. Catalyst systems according to the invention are suitable for reactions forming separable product and catalyst phases and supported ionic liquid phase SILP applications.
which is carrying an ester group, is deposited onto cobalt oxide surface by evaporation. The IL binds covalently to the surface by thermally activated cleavage of the ester group and formation of a bridging carboxylate. The anchoring reaction shows high structure sensitivity, which implies that the IL film can be adhered selectively to specific oxide surfaces.
Size-Controllable Gold-Platinum Alloy Nanoparticles on Nine Functionalized Ionic-Liquid Surfaces and Their Application as Electrocatalysts for Hydrogen Peroxide Reduction
作者:Yanyan Yu、Qian Sun、Xiaoqian Liu、Haihong Wu、Tianshu Zhou、Guoyue Shi
DOI:10.1002/chem.201100010
日期:2011.9.26
nanostructures can be facilely deposited in situ on the surface of Chi/RTILs through electrodeposition. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) results demonstrate that the alloy size is significantly dependent on the structure of the Chi/RTILs, with sizes ranging from 2.8 to 84.7 nm. Based upon the functionalized RTILs, nine Chi/RTIL–Au/Pt biosensors have been fabricated. First
Dual-functionalised ionic liquids: synthesis and characterisation of imidazolium salts with a nitrile-functionalised anion
作者:Dongbin Zhao、Zhaofu Fei、C. Andr� Ohlin、G�bor Laurenczy、Paul J. Dyson
DOI:10.1039/b408938c
日期:——
A series of ‘dual-functionalised’ ionic liquids, comprising imidazolium cations with various functionalities and the nitrile functionalised anion [CH3CH(BF3)CH2CN]− have been prepared; some exhibit very low viscosities—a highly valuable property in many applications.