Bisimidazole-Based Conjugated Polymers for Excellent Iodine Capture
Bisimidazole-Based Conjugated Polymers for Excellent Iodine Capture
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DOI：
10.1021/acsapm.0c01136
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发表时间：
2021-01-08
影响因子：
5
通讯作者：
Xu, Yan-Hong
中科院分区：
文献类型：
--
作者：
Niu, Tian-Hui;Feng, Chen-Chen;Xu, Yan-Hong
以2，2 ′-双咪唑为单体，在CuI（I）-KOH/KOH催化下与卤代芳烃发生交联反应，合成了一系列双咪唑类共轭多孔有机聚合物（Bislmi-POP@1-6）。在碘捕获方面，骨架中含有大量咪唑N-杂环单元的POP可作为有效的吸附剂，其对BisImi-POP @1、BislmiPOP@2、BisImi-POP@3、BisImi-POP@4、BisImi-POP@5、和BisImi-POP@6。这是第二次报道2，2 ′-双咪唑与POP阳离子主链和聚碘化物的液体配合物。与以往的固体碘吸附剂相比，基于咪唑及其衍生物的多孔材料在用作捕获放射性碘的吸附剂时显示出独特的性能。本文研究了咪唑基聚合物的碘吸附性能与咪唑氮杂环含量的关系。
We present a series of bisimidazole-based conjugated porous organic polymers (POPs) (Bislmi-POP@1-6), which were formed by the CuI(I)-KOH/KOH-catalyzed cross-coupling reaction between the 2,2'-bisimidazole monomer and aryl halides. For iodine capture, the resultant POPs with a large number of imidazole N-heterocycle units in the skeletons can be used as effective adsorbents, which exhibit high iodine capture capacities of 9.50, 10.30, 4.83, 6.45, 3.57, and 3.93 g g(-1) for BisImi-POPp@1, BislmiPOP@2, BisImi-POP@3, BisImi-POP@4, BisImi-POP@5, and BisImi-POP@6, respectively. This is the second report of 2,2'-bisimidazole liquid complexes of the cationic backbone of the POPs and polyiodides as far as we know. Compared with previous solid iodine adsorbents, porous materials based on imidazole and its derivatives show unique properties when they are used as adsorbents for capturing radioactive iodine. This work studied the relationship between the iodine adsorption properties of imiclaiole-based polymers and the content of imidazole nitrogen heterocycles.