Highly Active and Robust Metalloporphyrin Catalysts for the Synthesis of Cyclic Carbonates from a Broad Range of Epoxides and Carbon Dioxide
作者:Chihiro Maeda、Junta Shimonishi、Ray Miyazaki、Jun-ya Hasegawa、Tadashi Ema
DOI:10.1002/chem.201600164
日期:2016.5.4
metalloporphyrins with quaternary ammonium bromides (nucleophiles) at the meta, para, or ortho positions of meso‐phenyl groups were synthesized as catalysts for the formation of cycliccarbonatesfromepoxides and carbondioxide under solvent‐free conditions. The meta‐substituted catalysts exhibited high catalytic performance, whereas the para‐ and ortho‐substituted catalysts showed moderate and low activity
Bifunctionalorganocatalysts bearing an ammonium betaine framework have been developed as a new catalytic motif for the activation of carbondioxide and epoxides to produce cyclic carbonates.
Efficient chemical fixation of CO<sub>2</sub> from direct air under environment-friendly co-catalyst and solvent-free ambient conditions
作者:Rajesh Das、Thirumavalavan Ezhil、Athulya S. Palakkal、D. Muthukumar、Renjith S. Pillai、C. M. Nagaraja
DOI:10.1039/d1ta05138e
日期:——
products undermildconditions represents a promising step towards environmental remediation and energy sustainability. Consequently, herein, we report the first example of a Mg(II)-based MOF exhibiting highlyefficientfixation of CO2 from direct air into value-added cyclic carbonates under eco-friendly co-catalyst and solvent-free mildconditions. The bifunctional MOF catalyst was rationally constructed
在温和条件下从直接空气中捕获 CO 2并将其转化为增值产品代表了朝着环境修复和能源可持续性迈出的有希望的一步。因此,在本文中,我们报告了基于Mg( II ) 的 MOF的第一个实例,该实例在生态友好的助催化剂和无溶剂温和条件下,将直接空气中的 CO 2高效固定为具有附加值的环状碳酸酯。双功能 MOF 催化剂是通过利用生态友好的路易斯酸性金属离子 Mg( II ) 和富氮三足连接体 TATAB 合理构建的。MOF 具有 2606.13 m 2 g -1的高 BET 表面积以及用高密度的亲CO 2位点装饰的高极性一维通道,其在273 K 下促进了50.2 wt%的显着高CO 2吸收,具有55.13 kJ mol -1的高吸附热值。高 CO 2亲和力与高密度亲核和路易斯酸性位点的存在相结合,赋予 Mg-MOF 有效的催化性能,用于在环境友好的温和条件下从直接空气中化学固定 CO 2。Mg-MOF
Supported Ruthenium and Tetrapropylammonium Bromide
Catalysts for Oxidative Carboxylation of 1-Decene
作者:Raiedhah A. Alsaiari
DOI:10.14233/ajchem.2020.22350
日期:2020.3.10
involving epoxidation of olefin followed by reaction of the epoxide with CO2. This study used supported ruthenium catalysts for the epoxidation step (first step), where a combination of tetrapropylammonium bromide and zinc bromide was used for the cycloaddition of carbon dioxide. The supported ruthenium catalyst, prepared by a sol-immobilization method, allowed the effective epoxidation of 1-decene in
Synthesis of Ionic Liquids as Novel Nanocatalysts for Fixation of Carbon Dioxide with Epoxides by Using a Carbon Dioxide Balloon
作者:Pu Zhang、Rahele Zhiani
DOI:10.1007/s10562-020-03135-w
日期:2020.8
Abstract In the present study, the nanocatalyst of imidazolium based ionic liquids (ILs) is synthesized for the fixation of carbondioxide (CO 2 ) under moderate conditions by utilizing a balloon of CO 2 with commercially available epoxides. IL incorporated porous dendritic fibrous nanosilica (DFNS) catalyst (IL/DFNS) was designed and synthesized. The synthesized catalyst was characterized using N
摘要 在本研究中,合成了咪唑基离子液体 (ILs) 的纳米催化剂,用于在温和条件下利用 CO 2 气球与市售环氧化物固定二氧化碳 (CO 2 )。设计并合成了掺入 IL 的多孔树枝状纤维状纳米二氧化硅 (DFNS) 催化剂 (IL/DFNS)。合成的催化剂使用 N 2 吸收解吸等温线、XPS、SEM、EDX、TGA、HR-TEM 和 AFM 进行表征。对于环状碳酸酯,多孔 IL/DFNS 的环保催化剂在温和条件下从 CO 2 到 CO 2 固定和环氧化物显示出令人印象深刻的催化效率。IL 框架的极性羟基和阴离子交换性质基团具有高表面积被认为是提高催化效率和提高催化剂稳定性的主要方面,并提供适当的可回收性。图形摘要