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Immobilization of Au nanoparticles on poly(glycidyl methacrylate)‐functionalized magnetic nanoparticles for enhanced catalytic application in the reduction of nitroarenes and Suzuki reaction
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-08-07 , DOI: 10.1002/aoc.5828 Ali Pourjavadi 1 , Mohammad Kohestanian 1 , Nahid Keshavarzi 1
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-08-07 , DOI: 10.1002/aoc.5828 Ali Pourjavadi 1 , Mohammad Kohestanian 1 , Nahid Keshavarzi 1
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We report a novel strategy for the synthesis of magnetic nanocomposite for highly efficient catalysis. Poly(glycidyl methacrylate) (PGMA) chains were grafted to the surface of magnetic nanoparticles (MNPs) through surface‐initiated reversible addition‐fragmentation chain transfer polymerization. Then, the oxirane rings in the PGMA chains were opened with 2,6‐diamino pyridine (DAP) molecules as ligands to prepare the solid support. Finally, this magnetic nanocomposite was used for the immobilization of gold nanoparticles. Fourier‐transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis, transmission electron microscopy, scanning electron microscopy, gel permeation chromatography, vibrating sample magnetometry, and atomic absorption spectroscopy were used for characterization of the catalyst. The loading of gold nanoparticles on the solid support was 0.52 mmol/g. The catalytic activity of the prepared catalyst (MNP@PGMA@DAP@Au) was evaluated for the reduction of nitro compounds and C–C coupling reaction in water. The catalyst can be easily recovered and reused seven times without significant loss of catalytic activity.
中文翻译：
将金纳米颗粒固定在聚甲基丙烯酸缩水甘油酯官能化的磁性纳米颗粒上，以增强催化作用，用于还原硝基芳烃和Suzuki反应
我们报告了一种新型的合成策略，用于磁性纳米复合材料的高效催化。通过表面引发的可逆加成-断裂链转移聚合将聚甲基丙烯酸缩水甘油酯（PGMA）链接枝到磁性纳米颗粒（MNP）的表面。然后，以2,6-二氨基吡啶（DAP）分子作为配体打开PGMA链中的环氧乙烷环，以制备固体载体。最后，将该磁性纳米复合材料用于金纳米颗粒的固定化。傅里叶变换红外光谱，X射线衍射，热重分析，透射电子显微镜，扫描电子显微镜，凝胶渗透色谱，振动样品磁力分析和原子吸收光谱用于表征催化剂。固体载体上金纳米颗粒的负载量为0.52mmol / g。对制备的催化剂（MNP @ PGMA @ DAP @ Au）的催化活性进行了评估，以减少水中的硝基化合物和CC偶联反应。该催化剂可以容易地回收并重复使用七次，而不会显着降低催化活性。
更新日期：2020-09-14
中文翻译：
将金纳米颗粒固定在聚甲基丙烯酸缩水甘油酯官能化的磁性纳米颗粒上，以增强催化作用，用于还原硝基芳烃和Suzuki反应
我们报告了一种新型的合成策略，用于磁性纳米复合材料的高效催化。通过表面引发的可逆加成-断裂链转移聚合将聚甲基丙烯酸缩水甘油酯（PGMA）链接枝到磁性纳米颗粒（MNP）的表面。然后，以2,6-二氨基吡啶（DAP）分子作为配体打开PGMA链中的环氧乙烷环，以制备固体载体。最后，将该磁性纳米复合材料用于金纳米颗粒的固定化。傅里叶变换红外光谱，X射线衍射，热重分析，透射电子显微镜，扫描电子显微镜，凝胶渗透色谱，振动样品磁力分析和原子吸收光谱用于表征催化剂。固体载体上金纳米颗粒的负载量为0.52mmol / g。对制备的催化剂（MNP @ PGMA @ DAP @ Au）的催化活性进行了评估，以减少水中的硝基化合物和CC偶联反应。该催化剂可以容易地回收并重复使用七次，而不会显着降低催化活性。
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