Facile Synthesis and Tunable Porosities of Imidazolium‐Based Ionic Polymers that Contain In Situ Formed Palladium Nanoparticles
Facile Synthesis and Tunable Porosities of Imidazolium‐Based Ionic Polymers that Contain In Situ Formed Palladium Nanoparticles
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DOI：
10.1002/cctc.201600294
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发表时间：
2016-07
期刊：
影响因子：
4.5
通讯作者：
Yangxin Wang;Hong Zhong;Liuyi Li;Ruihu Wang
中科院分区：
文献类型：
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作者：
Yangxin Wang;Hong Zhong;Liuyi Li;Ruihu Wang
通过Suzuki-Miyaura交叉偶联反应合成了一系列含有原位生成的Pd纳米粒子的咪唑基离子聚合物(Pd@PIPs)。通过调节二氧化硅的用量，可以很好地调节Pd@PIPs的层次化孔隙率。Pd纳米粒子是伴随形成的，并且均匀地包裹在聚合物的孔洞中。适当使用SiO_2模板剂，可以在不添加额外Pd物种的情况下，明显提高催化硝基芳烃加氢反应的活性。良好的催化性能归功于丰富的中孔和大孔在催化反应中促进了底物的传质。
A series of porous imidazolium‐based ionic polymers that contain in situ formed Pd nanoparticles (Pd@PIPs) was synthesized by a Suzuki–Miyaura cross‐coupling reaction in the presence of SiO2 particles. The hierarchical porosities of Pd@PIPs can be regulated well by adjusting the dosage of SiO2. Pd nanoparticles are formed concomitantly and encapsulated uniformly within the pores of the polymers. The appropriate usage of SiO2 templates results in a clear enhancement of the catalytic activity in the hydrogenation of nitroarenes without the addition of extra Pd species. The excellent catalytic performances are attributed to abundant meso‐ and macropores that facilitate the mass transfer of substrates during catalytic reactions.