Imparting magnetic functionality to iron-based MIL-101 via facile Fe<sub>3</sub>O<sub>4</sub> nanoparticle encapsulation: an efficient and recoverable catalyst for aerobic oxidation
作者:Zhaokui Jin、Yi Luan、Mu Yang、Jia Tang、Jingjing Wang、Hongyi Gao、Yunfeng Lu、Ge Wang
DOI:10.1039/c5ra17180f
日期:——
synthesizable and highly efficient catalysts is a fundamental goal of catalysis science. In this work, highly superparamagnetic nanoparticles (Fe3O4 NPs) were prepared through a modified co-precipitation method and embedded into a Fe-MIL-101 metal–organic-framework through a facile encapsulation strategy. The catalytic activity of Fe3O4/Fe-MIL-101 was investigated in the aerobicoxidation of alcohols and
可持续,易于合成和高效催化剂的开发是催化科学的基本目标。在这项工作中,通过改进的共沉淀方法制备了高度超顺磁性的纳米颗粒(Fe 3 O 4 NPs),并通过简便的封装策略将其嵌入到Fe-MIL-101金属-有机框架中。Fe 3 O 4的催化活性/ Fe-MIL-101在酒精的好氧氧化和烯烃的环氧化中进行了研究。在温和条件下,两个反应均观察到高产率(高达定量转化)。此外,磁性NP / MOF催化剂可以轻松回收和循环利用。即使在连续八批反应中使用后,也没有观察到明显的催化效率损失。这类催化剂有望用于绿色和实际的大规模工业应用。
Cavity-Tailored, Self-Sorting Supramolecular Catalytic Boxes for Selective Oxidation
作者:Suk Joong Lee、So-Hye Cho、Karen L. Mulfort、David M. Tiede、Joseph T. Hupp、SonBinh T. Nguyen
DOI:10.1021/ja804014y
日期:2008.12.17
Using a steric self-sorting strategy, the assembly of highly ordered and rigid supramolecular boxes possessing catalytic properties has been achieved in one step. The formation of these assemblies, comprising up to 18 porphyrin centers, was readily confirmed by sotution X-ray scattering in conjunction with fluorescent spectroscopy. Size-selective and enantioselective oxidation catalysis were both demonstrated.
Nanoscaled Copper Metal-Organic Framework (MOF) Based on Carboxylate Ligands as an Efficient Heterogeneous Catalyst for Aerobic Epoxidation of Olefins and Oxidation of Benzylic and Allylic Alcohols
作者:Yue Qi、Yi Luan、Jie Yu、Xiong Peng、Ge Wang
DOI:10.1002/chem.201405685
日期:2015.1.19
reaction. The utilization of a copper metal–organic framework catalyst was further extended to the aerobicoxidation of aromatic alcohols. The shape and size selectivity of the catalyst in olefin epoxidation and alcoholoxidation was investigated. Furthermore, the as‐synthesized copper catalyst can be easily recovered and reused several times without leaching of active species or significant loss of activity
On the effect of cyclodextrin on the Z/E-selectivity of Wittig Reactions with semistabilized ylides
作者:Gunnar Westman、Olof Wennerström、Ilona Raston
DOI:10.1016/s0040-4020(01)80315-x
日期:1993.1
The Z/E-selectivity of Wittigreactions between semistabilized ylids and aromatic aldehydes is affected by the addition of host molecules such as cyclodextrins (CD). An increase in the Z-selectivity from 57 to 92% has been reached with DMF as solvent and an increase in the E-selectivity from 67 to 80% has been reached with ethanol as solvent for the same Wittigreaction. Reactions with arenes with bulky