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Amphiphilic polymeric nanoreactors containing Rh(I)–NHC complexes for the aqueous biphasic hydrogenation of alkenes
Catalysis Science & Technology ( IF 5 ) Pub Date : 2021-09-14 , DOI: 10.1039/d1cy00554e Sasaline Salomon Sambou 1 , Roman Hromov 1 , Illia Ruzhylo 1 , Hui Wang 1 , Audrey Allandrieu 1 , Cassandra Sabatier 1 , Yannick Coppel 1 , Jean-Claude Daran 1 , Florence Gayet 1 , Agnès Labande 1 , Eric Manoury 1 , Rinaldo Poli 1, 2
Catalysis Science & Technology ( IF 5 ) Pub Date : 2021-09-14 , DOI: 10.1039/d1cy00554e Sasaline Salomon Sambou 1 , Roman Hromov 1 , Illia Ruzhylo 1 , Hui Wang 1 , Audrey Allandrieu 1 , Cassandra Sabatier 1 , Yannick Coppel 1 , Jean-Claude Daran 1 , Florence Gayet 1 , Agnès Labande 1 , Eric Manoury 1 , Rinaldo Poli 1, 2
Affiliation
A rhodium(I) complex bearing a monodentate N-heterocyclic carbene ligand has been confined into the core of amphiphilic polymeric core-crosslinked micelles (CCMs). The Rh complex was covalently bound to the polymeric chains by incorporation of a polymerizable unit on the NHC ligand. Nanoreactor Rh–NHCmes@CCM 5b has been evaluated as a catalyst for the aqueous biphasic hydrogenation of styrene and other alkenes. It has shown a high activity with styrene at a low catalytic loading (10 000/1 substrate/Rh ratio), greater than that of an analogous molecular Rh(I) complex, and its evolution to Rh0 is slower. This is attributed to several factors, among which the confinement effect and the favourable polyoxygenated environment of the nanoreactor core. Finally, the CCMs could be recycled up to four times with almost no loss of activity over 3 h cycles and the loss of rhodium per cycle was on average lower than 0.6 ppm.
中文翻译:
含有 Rh(I)-NHC 配合物的两亲聚合物纳米反应器用于烯烃的水相双相氢化
带有单齿 N-杂环卡宾配体的铑 ( I ) 络合物已被限制在两亲聚合物核交联胶束 (CCM) 的核心中。通过在 NHC 配体上引入可聚合单元,Rh 复合物与聚合物链共价结合。纳米反应器 Rh-NHC mes @CCM 5b已被评估为苯乙烯和其他烯烃水相双相氢化的催化剂。它在低催化负载(10 000/1 底物/Rh 比率)下显示出与苯乙烯的高活性,大于类似分子 Rh( I ) 络合物的活性,并且其演化为 Rh 0比较慢。这归因于几个因素,其中包括纳米反应器核心的限制效应和有利的多氧化环境。最后,CCM 可以循环使用多达四次,在 3 小时循环内几乎没有活性损失,每个循环的铑损失平均低于 0.6 ppm。
更新日期:2021-09-14
中文翻译:
含有 Rh(I)-NHC 配合物的两亲聚合物纳米反应器用于烯烃的水相双相氢化
带有单齿 N-杂环卡宾配体的铑 ( I ) 络合物已被限制在两亲聚合物核交联胶束 (CCM) 的核心中。通过在 NHC 配体上引入可聚合单元,Rh 复合物与聚合物链共价结合。纳米反应器 Rh-NHC mes @CCM 5b已被评估为苯乙烯和其他烯烃水相双相氢化的催化剂。它在低催化负载(10 000/1 底物/Rh 比率)下显示出与苯乙烯的高活性,大于类似分子 Rh( I ) 络合物的活性,并且其演化为 Rh 0比较慢。这归因于几个因素,其中包括纳米反应器核心的限制效应和有利的多氧化环境。最后,CCM 可以循环使用多达四次,在 3 小时循环内几乎没有活性损失,每个循环的铑损失平均低于 0.6 ppm。