Covalent immobilization of ultrafine platinum particles onto crosslinked polymer support and their application to catalysis.
Covalent immobilization of ultrafine platinum particles onto crosslinked polymer support and their application to catalysis.
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超细铂颗粒共价固定在交联聚合物载体上及其在催化中的应用。
DOI：
10.1246/bcsj.63.1433
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发表时间：
1990
影响因子：
4
通讯作者：
H. Hirai
中科院分区：
文献类型：
--
作者：
M. Ohtaki;N. Toshima;M. Komiyama;H. Hirai
在可溶性保护聚合物的存在下，通过光还原法制备了稳定的铂超细颗粒水分散体。通过使用丙烯酸甲酯残基作为反应基团的保护性聚合物，聚合物保护的超细铂颗粒被成功地固定到具有氨基的交联聚合物载体上。目前的固定化归因于形成酰胺键的保护性聚合物中的丙烯酸甲酯残基与载体中的氨基基团的反应，和固定化机理进行了研究的模型反应使用的保护性聚合物与对硝基苯基丙烯酸酯残基作为反应基团。由于载体和底物之间的疏水-疏水相互作用，所得到的固定化铂颗粒显示出高的烯烃加氢催化活性和特定的底物选择性。
Ultrafine particles of platinum were prepared as stable aqueous dispersions by a photoreduction method in the presence of soluble protective polymers. By use of the protective polymer with methyl acrylate residues as a reactive group, the polymer-protected ultrafine platinum particles were successfully immobilized onto crosslinked polymer supports with amino groups. The present immobilization was attributed to the formation of amide bonds by the reaction of methyl acrylate residues in the protective polymer with amino groups in the support, and the immobilization mechanism was investigated by the model reaction using protective polymer with p-nitrophenyl acrylate residues as a reactive group. The immobilized platinum particles obtained show high catalytic activity for hydrogenation of olefins and specific substrate selectivity due to a hydrophilic–hydrophobic interaction between the support and the substrate.