| 曹锰,王振希,张健,徐胜,张尚玺,柳阳,戴欣,江新德,吴锦辉.化学通报,2019,82(4):340-349. |
| 基于纳米二氧化硅与MCM-41的两种多相钯催化剂的合成及其在Suzuki反应中的应用（英文） |
| Synthesis of Two Homogeneous Pd catalysts Based on Nano Silica and MCM-41 and Their Application in Suzuki Reaction |
| 投稿时间：2018-08-08 修订日期：2019-01-05 |
| DOI： |
| 中文关键词: 纳米二氧化硅 MCM-41 表面修饰 多相催化 Suzuki偶联 |
| 英文关键词:Nano Silica, MCM-41, Surface Modification, Heterogeneous catalysis, Suzuki Reaction. |
| 基金项目:江西省教育厅自然科学基金（GJJ161127）和国家自然科学基金（51303074）资助项目。 |
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| 中文摘要: |
| 含氮膦配体的钯配合物被负载于纳米二氧化硅和MCM-41表面。由此得到的两种新型多相钯催化剂SiO2@PNPPdCl2（1）和MCM-41@PNPPdCl2（2）均通过SEM（EDX）、TEM（SAED）、XRD、FT-IR、ICP-MS和TGA等手段进行全面表征。微观结构表明，这两种纳米颗粒具有完全不同的结构，1为不规则球体，2具有蜂窝孔状结构。本文进一步研究了纳米粒子1和2在Suzuki偶联反应中以乙醇和水为溶剂的温和条件下的催化性能。研究显示两种催化剂均具有较好的基团耐受性，循环利用四次的平均产率分别为81%(1)和89%(2)。它们的催化性能也略有不同，催化剂1的催化速率高于2，催化剂2具有较好的循环利用性能。 |
| 英文摘要: |
| Palladium compounds containing diphosphine ligand with N atom were immobilized on the surface of Nano silica and MCM-41 respectively. The resulting two novel heterogeneous Pd catalysts SiO2@PNPPdCl2(1) and MCM-41@PNPPdCl2(2) were fully characterized by SEM(EDX), TEM(SAED), XRD, FT-IR, ICP-Ms and TGA. Microstructure tests show those two nanoparticles have completely different structures, 1 has an irregular sphere structure and 2 has a honeycomb structure. They were investigated as catalysts for Suzuki reactions in EtOH/H2O(V/V=3/2) system to provide target products with different yields. The two catalysts had good group tolerance, and their average yields in four cycles were 81% (1) and 89% (2) respectively. Their catalytic properties are also slightly different. The catalytic rate of catalyst 1 is much faster than that of 2, while catalyst 2 has better recycling performance. |
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