Vapor-phase postsynthetic amination of hypercrosslinked polymers for efficient iodine capture  

作　　者：Pengcheng Su Shizheng Chen Zhihong Yang Ningning Zhong Chenzi Jiang Wanbin Li 

机构地区：[1]School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230026,China [2]School of Environment,Jinan University,Guangzhou 511443,China [3]Jiangsu Environmental Protection Group Nantong Co.,Ltd.,Nantong 226010,China

出　　处：《Chinese Chemical Letters》2024年第9期320-325,共6页中国化学快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(No.22178143);Guangdong Basic and Applied Basic Research Foundation(Nos.2021A1515110365 and2020B1515120036);Natural Science Foundation of Anhui Higher Education Institutions(No.2023AH050168);Innovation and Entrepreneurship Training Program for China College Students(No.202310878049);Director Foundation of Anhui Province Engineering Laboratory of Advanced Building Materials(No.JZCL2305ZR);Ph.D.Startup Foundation of Anhui Jianzhu University(No.2023QDZ34)。

摘　　要：Hypercrosslinked polymers(HCPs)with large surface areas,high intrinsic porosities and low production costs may be available platforms for iodine capture.However,the lack of iodine-philicity binding sites limits their adsorption capacity.Here we use vapor-phase postsynthetic amination strategy to introduce electron-donating amino groups into the prefabricated HCPs for enhancing their iodine capture performance.Through simple vapor-phase exposure,the halogen-containing HCPs can be grafted by amines through nucleophilic substitution toward chloro groups.Combining with the abundant amino groups and high porosities,the amino-functionalized porous polymers show substantially increased iodine adsorption capacity,about 221%as that of original one,accompanied by excellent recyclability.Mechanism investigations reveal the key roles of the electron-donor amino groups andπ-conjugated benzene rings along with structure characteristics of porous polymer frameworks in iodine capture.Moreover,this vapor-phase amination strategy shows good generality and can be extended to various amines,e.g.,ethylenediamine,1,3-diaminopropane and diethylenetriamine.Our work proves that this simple vapor-phase postsynthetic functionalization strategy may be applied in other porous polymers with wide application prospects in adsorption,separation and storage.

关 键 词：Porous polymers Postsynthetic amination Hypercrosslinked polymers Vapor-phase grafting Iodine capture 

分 类 号：TQ317[化学工程—高聚物工业]