期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 14, 页码 12389-12398出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b01877
关键词
metal recovery; catalysis; palladium; dithiocarbamates; immobilization
资金
- Ministry of Higher Education, Malaysia
- Universiti Teknologi MARA, Malaysia
- Department of Chemistry, Imperial College London
- Imperial College European Partners Fund
[PdI2(Me(2)dazdt)] is obtained from palladium powder via a 100% atom -economical Pd(0) leaching reaction using Me(2)dazdt (N,N'-dimethyl-perhydrodiazepine-2,3-dithione) and iodine. This complex is a versatile starting point for ligand exchange reactions with (di)phosphines, yielding trans-[PdI2(PPh3)(2)] and [PdI2(dppe)] (dppe = 1,2-bis-(diphenylphosphino)ethane). Further reaction with dithiocarbamates provides compounds of the form [Pd(DTC)(L)(n)](+) (DTC = dithiocarbamate; L = PPh3, n = 2; L = dppe, n = 1), which are highly active catalysts for regio- and chemoselective C H bond activation reactions. Using DTC ligands with trimethoxysilyl-terminated tethers, the palladium(II) units can be attached to the surface of core shell, silica -coated Fe3O4 nanoparticles. Once units form the catalytically active component of a recyclable, quasi -heterogeneous, Pd(II)-based catalytic system based on recovered palladium, illustrating the proposed circular model strategy. These investigations contribute to key steps in this process, such as efficient, atom-economical recovery, chemoselectivity of ligand substitution reactions, demonstration of catalytic activity, and the potential for immobilization of catalytic surface units derived from recovered metal.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据