文献类型：期刊文献

英文题名：Engineering active sites in two dimensional covalent organic frameworks boosts the capture of iodine

作者：Yang, Lan[1];He, Yanyan[1];Yang, Na[2];Liu, Honglai[1];Zhu, Xiang[2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Suzhou Res Inst, State Key Lab Oxo Synth & Select Oxidat, Lanzhou Inst Chem Phys, Suzhou 215000, Peoples R China

年份：2024

卷号：328

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20233714725604);WOS:【SCI-EXPANDED(收录号:WOS:001079857200001)】；

基金：X. Z. thanks the financial support from National Natural Science Foundation of China (E00966GZQ2 and E00966GMS1) and appreciates the support from Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (E30159SQ) . H. L. was supported by National Natural Science Foundation of China (22378112) and the Fundamental Research Funds for the Central Universities (2022ZFJH04) .

语种：英文

外文关键词：Covalent organic framework; Iodine capture; Ethynyl site; Triazine site

摘要：The search and development of novel covalent organic frameworks (COFs) as advanced adsorbents for efficient capture of radiological iodine is of great interest. Herein, a rational modulation of active sites within COFs was reported to achieve enhanced iodine capture performance. A facile installation of electron-rich ethynyl moieties within backbones of the COF adsorbent led to a successful 38% rise of iodine adsorption capacity, from 3.34 g g-1 to 4.61 g g-1, due to the intrinsic strong interaction between ethynyl sites and iodine molecules. Moreover, this uptake can be further enhanced to be 5.07 g g-1 through the incorporation of rich basic triazine sites into the ethynyl-linked framework on account of the Lewis acidity of iodine. These results not only give a rise to extend our understanding of structure-property relationship for efficient removal of radiological iodine, but also offer new possibilities for the rational design and synthesis of novel COF-based adsorbents for separation applications.