由芳香族聚合物网络稳定的单金属和双金属纳米颗粒用于铃木交叉偶联反应。
Mono- and Bimetallic Nanoparticles Stabilized by an Aromatic Polymeric Network for a Suzuki Cross-Coupling Reaction.
作者信息
Nikoshvili Linda Zh, Shkerina Kristina N, Bykov Alexey V, Sidorov Alexander I, Vasiliev Alexander L, Sulman Mikhail G, Kiwi-Minsker Lioubov
机构信息
Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, Afanasy Nikitina Street 22, 170026 Tver, Russia.
National Research Centre "Kurchatov Institute", Kurchatov Square 1, 123182 Moscow, Russia.
出版信息
Nanomaterials (Basel). 2021 Dec 29;12(1):94. doi: 10.3390/nano12010094.
This work addresses the Suzuki cross-coupling between 4-bromoanisole (BrAn) and phenylboronic acid (PBA) in an environmentally benign ethanol-water solvent catalysed by mono- (Pd) and bimetallic (PdAu, PdCu, PdZn) nanoparticles (NPs) stabilised within hyper-cross-linked polystyrene (HPS) bearing tertiary amino groups. Small Pd NPs of about 2 nm in diameters were formed and stabilized by HPS independently in the presence of other metals. High catalytic activity and complete conversion of BrAn was attained at low Pd loading. Introduction of Zn to the catalyst composition resulted in the formation of Pd/Zn/ZnO NPs, which demonstrated nearly double activity as compared to Pd/HPS. Bimetallic core-shell PdAu/HPS samples were 3-fold more active as compared to Pd/HPS. Both Pd/HPS and PdAu/HPS samples revealed promising stability confirmed by catalyst recycling in repeated reaction runs.
这项工作研究了在由负载叔胺基的超交联聚苯乙烯（HPS）稳定的单金属（Pd）和双金属（PdAu、PdCu、PdZn）纳米颗粒（NPs）催化下，4-溴苯甲醚（BrAn）与苯硼酸（PBA）在环境友好的乙醇-水溶剂中的铃木交叉偶联反应。在其他金属存在的情况下，HPS独立形成并稳定了直径约为2 nm的小Pd NPs。在低Pd负载量下实现了高催化活性和BrAn的完全转化。向催化剂组合物中引入Zn导致形成Pd/Zn/ZnO NPs，其活性几乎是Pd/HPS的两倍。双金属核壳结构的PdAu/HPS样品的活性是Pd/HPS的3倍。Pd/HPS和PdAu/HPS样品在重复反应运行中的催化剂循环实验证实了它们具有良好的稳定性。
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