10040-96-7Relevant articles and documents
An efficient route to unsymmetrical bis(azolium) salts: CCC-NHC pincer ligand complex precursors
Box, Hannah K.,Howell, Tyler O.,Kennon, William E.,Burk, Griffin A.,Valle, Henry U.,Hollis, T. Keith
, p. 2191 - 2195 (2017)
The coupling of N-heterocyclic azoles (imidazoles, benzimidazoles, triazoles) to bromobenzenes (1,2-; 1,3-; or 1,4) in a step-wise, sequential manner was accomplished by manipulation of reaction time and stoichiometry, which provided straight-forward acce
Magnetic nano-Fe3O4 supported ionic liquids: A recoverable phase transfer catalyst for c-n cross coupling reaction
Tang, Lin,Sun, Yu,Zhou, Lingyun,Shao, Taili
, p. 6240 - 6242 (2013)
Magnetic nanoparticles-supported quaternary ammonium salts were prepared and evaluated as phase transfer catalysts. Some of them exhibited good activities in CuCl-catalyzed N-arylation of aryl amines and N-heterocycles with aryl iodides in aqueous solution without any ligands. They could be readily separated from reaction solution using an external magnet and reused three times with a little loss in activity.
3D printing of a heterogeneous copper-based catalyst
Tubío, Carmen R.,Azuaje, Jhonny,Escalante, Luz,Coelho, Alberto,Guitián, Francisco,Sotelo, Eddy,Gil, Alvaro
, p. 110 - 115 (2016)
One of the most important environmental challenges of modern society is to develop new catalysts that make possible chemical processes with reduced environmental impact. Catalyst immobilization is an appealing strategy that, in addition to facilitating catalyst recovery, has proved to give higher catalytic performance, since the solid support usually provides chemical, thermal, and mechanical stabilization to the catalytic species. In this work Cu/Al2O3 catalytic system with a woodpile porous structure is synthesized by 3D printing and then sintered at high temperature to generate a copper-supported rigid structure with high mechanical strength, a high surface-to-volume ratio, and controlled porosity. The catalytic species (Cu) are immobilized in the Al2O3 matrix to avoid the leaching of the metal into the reaction medium. Al2O3 was selected because it is a good material to obtain a structure with high mechanical stability after high-temperature treatment. The resulting device shows high catalytic efficacy and good recyclability and did not produce leaching of copper to the reaction medium in different Ullmann reactions. Ease of preparation, excellent reactivity, recyclability, and negligible metal contamination all make the 3D printing technique a good strategy for fabricating other types of metal/oxide heterogeneous catalytic systems.
The Catalytic Properties of a Copper-Based Nanoscale Coordination Polymer Fabricated by a Solvent-Etching Top-Down Route
Cao, Xiaowei,Fang, Zhenlan,Huang, Wei,Ju, Qiang
, p. 4803 - 4807 (2017)
Manipulating particle size is a powerful means of creating unprecedented applications in both inorganic and organic materials. Coordination polymers, which are emerging as a type of organic–inorganic hybrid materials, have attracted thriving interest in a variety of applications, but nanoscale coordination polymers have scarcely been touched. In this work, the pure-phase {Cu6[1,4-bis(imidazol-1-yl)butane]3I6}∞ coordination polymer with different sizes and morphologies was synthesized for the first time through a facile top-down route assisted by solvent etching. The size and morphology could be adjusted simply by varying the participating etching solvents. Our mechanistic investigations suggest that the bulk coordination polymer as a precursor in the etching solvents may experience a process of dispersion, dissolution, and recrystallization to generate the nanoscale counterpart. High catalytic activity of the nanoscale coordination polymer was observed in the N-arylation of imidazole aryl halides, and this was attributed to a high surface area and a low coordination number of unsaturated coordination sites. This simple and rapid preparation, requiring neither specialized equipment nor harsh conditions, suggests a wealth of potential for reducing the size of coordination polymers to comply with various practical applications.
Synthesis and characterization of nano-cellulose immobilized phenanthroline-copper (I) complex as a recyclable and efficient catalyst for preparation of diaryl ethers, N-aryl amides and N-aryl heterocycles
Aghili, Nora,Hosseinzadeh, Rahman,Mavvaji, Mohammad
, (2022/01/03)
Functionalized nanocellulose was prepared and employed for immobilization of phenanthroline-copper(I) complex to afford cellulose nanofibril grafted heterogeneous copper catalyst [CNF-phen-Cu(I)]. This nanocatalyst was well characterized using FT-IR, NMR, XRD, CHNS, AAS, TGA, EDX and SEM. The activities of the synthesized catalyst were examined in the synthesis of diaryl ethers via C-O cross-coupling of phenols and aryl iodides, as well as, the preparation of N-aryl amides and N-aryl heterocycles through C-N cross-coupling of amides and N-H heterocycle compounds with aryl halides. In this trend, various substrates containing electron-donating and electron-withdrawing groups were exploited to evaluate the generality of this catalytic protocol. Accordingly, the catalyst demonstrated remarkable catalytic efficiency for both C-N and C-O cross-coupling reactions, thereby resulting in good to excellent yields of the desired products. Furthermore, the recoverability experiments of the catalyst showed that it can be readily retrieved by simple filtration and successfully reused several times with negligible loss of its catalytic activity.
Core-shell Cu2S:NiS2@C hybrid nanostructure derived from a metal-organic framework with graphene oxide for photocatalytic synthesis of N-substituted derivatives
Yusuf, Mohammad,Hira, Shamim Ahmed,Lim, Hyeonhan,Song, Sehwan,Park, Sungkyun,Park, Kang Hyun
, p. 9018 - 9027 (2021/04/16)
Recently, photocatalysis has attracted considerable interest, leading to opportunities for using renewable energy sources. A Cu:Ni metal-organic framework (MOF) modified with graphene oxide (GO) was fabricated by a facile and convenient process. Subsequen
Synthesis and Physical Properties of Tunable Aryl Alkyl Ionic Liquids (TAAILs)
Lerch, Swantje,Strassner, Thomas
supporting information, p. 15554 - 15557 (2021/10/06)
Tunable aryl alkyl ionic liquids (TAAILs) based on the imidazolium cation were first reported in 2009. Since then, a series of TAAILs with different properties due to the electron-donating or -withdrawing effect of the substituents at the aryl ring has be
