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Gold nanoparticles encapsulated in hierarchical porous polycarbazole: preparation and application in catalytic reduction

机译：封装在分层多孔聚氨基咔唑中的金纳米颗粒：制备和催化还原中的应用

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Porous organic polymers possessing high surface area and permanent porosity are emerging as a new kind of catalyst support. In this article, surface-functionalized gold nanoparticles (AuNPs) were presynthesized and further subjected to the FeCl _(3) -promoted oxidative coupling copolymerization with 1,3,5-tri(9 H -carbazol-9-yl)benzene to afford AuNPs encapsulated in porous polycarbazole (AuNPs@CPOP) under mild conditions. Through this preparative approach, the AuNPs do not occupy the cavities of the polymer, but instead are surrounded by grown porous polymer. Furthermore, transmission electron microscopy shows that the AuNPs are homogeneously embedded in the polymeric support with a narrow size distribution. The nitrogen sorption measurements show that AuNPs@CPOP possesses high porosity, the pore size distributions are hierarchical with micro-, meso-, and macropore size. The catalytic activities of the final porous composite materials are studied by the reduction of 4-nitrophenol to 4-aminophenol. The catalytic activity of AuNPs@CPOP is found to be outstanding with an activity factor of up to 17.57 s ~(?1) g ~(?1) . The conjugated polycarbazole-encapsulated AuNPs have potential application in the fields of environmental chemistry and catalysis.
机译：具有高表面积和永久性孔隙率的多孔有机聚合物作为一种新型催化剂载体。在本文中，将表面官能化的金纳米颗粒（AUNP）进行了预期化并进一步进行了FECL _（3） - 用1,3,5-三（9h-Carbazol-9-基）苯的氧化氧化偶联共聚，得到负担在温和条件下封装在多孔聚氨基咔唑（AUNPS @ CPOP）中封装的AUNP。通过这种制备方法，AUNP不占据聚合物的空腔，而是通过生长的多孔聚合物包围。此外，透射电子显微镜表明，通过窄尺寸的分布，肛周均匀地嵌入聚合物载体中。氮素吸附测量表明，AUNPS @ CPOP具有高孔隙率，孔径分布是具有微观，中间，和大孔尺寸的等级。通过将4-硝基苯酚还原为4-氨基苯酚来研究最终多孔复合材料的催化活性。发现AUNPS @ CPOP的催化活性未突出，活动因子高达17.57 s〜（？1）g〜（？1）。缀合的聚氨基咔唑封装的AUNPS在环境化学和催化领域具有潜在的应用。

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