The effect of framework functionality on the catalytic activation of supported Pd nanoparticles in the Mizoroki-Heck coupling reaction

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• 作者：Fatemeh Ashouri^a ; ^{f.ashouri@iaups.ac.ir} ; Maryam Zare^b ; Mojtaba Bagherzadeh^c
• 关键词：Palladium nanoparticles ; Heterogeneous catalyst ; Mizoroki&ndash ; Heck coupling reaction ; Nonfunctional coordination polymer ; Functionalized framework
• 刊名：Comptes Rendus Chimie
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：20
• 期：2
• 页码：107-115
• 全文大小：1433 K
• 卷排序：20

文摘

Palladium nanoparticles (Pd-NPs) were supported on functional and nonfunctional Co-coordination polymers (Pd/CoBDCNH2 and Pd/CoBDC). Advanced analytical techniques revealed that Pd-NPs are supported on the external surface of the polymer framework and the functionalized framework possesses effective influence to prevent Pd-NP aggregation. Supported Pd-NPs were effectively applied as heterogeneous recyclable catalysts in the Mizoroki–Heck C–C cross coupling reactions of iodobenzene and either aromatic or aliphatic terminal alkenes. Catalytic results exhibited that highly dispersed Pd-NPs with low loading (1%) on the functional polymer (Pd/CoBDCNH2) are more effective than aggregated Pd-NPs with high loading (9%) on the nonfunctional polymer (Pd/CoBDC). Both catalysts can simultaneously provide high activity and selectivity to E-coupled products, high efficiency in low amounts, easy separation of heterogeneous catalyst and appropriate performance in the recycling reaction without addition of a reducing agent.