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Engineering the Pore Structure and Functionality of Ionic Porous Polymers for Separating Acetylene over Carbon Dioxide
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-02-20 , DOI: 10.1002/adfm.202214887
Hanqian Pan 1 , Xian Suo 1, 2 , Zhenglu Yang 1 , Lifeng Yang 1 , Xili Cui 1, 2, 3 , Huabin Xing 1, 2
Affiliation  

Precise engineering of organic porous polymers to realize the selective separation of structurally similar gases presents a great challenge. In this study, a new class of ionic porous polymers P(Ph3Im-Br-nDVB) with a high ionic density and microporous surface area are constructed through a facile copolymerization strategy, providing an efficient path to rational control over pore structure and functionality. The first example of ionic porous organic polymers is reported to address the challenge of discriminating the subtle difference of C2H2 and CO2, which have almost identical molecular sizes and similar physicochemical properties, which achieve the highest C2H2/CO2 selectivity (17.9) among porous organic polymers. These ionic porous polymers exhibit high stability and excellent dynamic breakthrough performance for binary C2H2/CO2 mixtures, indicating their practical feasibility. Modeling studies reveal that anions are the specific binding sites for preferential C2H2 capture because of Br···HCCH interactions. This study not only demonstrates an efficient strategy to build novel ionic porous polymers integrating abundant micropores and ionic sites but also sheds some light on the development of functionalized materials for the separation of structurally similar gas molecules.

中文翻译:

设计离子多孔聚合物的孔结构和功能,用于分离二氧化碳中的乙炔

有机多孔聚合物的精确工程以实现结构相似气体的选择性分离提出了巨大挑战。在这项研究中,通过简便的共聚策略构建了一类具有高离子密度和微孔表面积的新型离子多孔聚合物 P(Ph3Im-Br-nDVB),为合理控制孔结构和功能提供了有效途径。据报道,离子多孔有机聚合物的第一个例子解决了区分 C 2 H 2和 CO 2的细微差别的挑战,它们具有几乎相同的分子大小和相似的物理化学性质,达到最高的 C 2 H 2 /CO 2多孔有机聚合物之间的选择性 (17.9)。这些离子多孔聚合物对二元C 2 H 2 /CO 2混合物表现出高稳定性和优异的动态突破性能,表明它们具有实际可行性。建模研究表明,由于 Br − ···HCCH 相互作用,阴离子是优先捕获 C 2 H 2的特定结合位点。这项研究不仅展示了一种构建新型离子多孔聚合物的有效策略,该聚合物集成了丰富的微孔和离子位点,而且还为开发用于分离结构相似的气体分子的功能化材料提供了一些启示。
更新日期:2023-02-20
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