A nitrogen-rich halogen-bonded organic framework (XOF) for efficient iodine capture and security printing  

作　　者：Qi Zhao Penghao Sun Guanfei Gong Yi Chen Lingzhi Luo Yongfei Yin Chunsheng Li Jike Wang Lu Wang Shigui Chen 

机构地区：[1]The Institute for Advanced Studies,Wuhan University,Wuhan 430072,China [2]Ningxia Vocational Technical College of Industry and Commerce,Yinchuan 750100,China [3]Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China,School of Chemistry and Life Sciences,Suzhou University of Science and Technology,Suzhou 215009,China

出　　处：《Science China Chemistry》2025年第2期631-640,共10页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China (22371218, 21702153, and 21801194);Wuhan Science and Technology Bureau (whkxjsj009);the support of the Core Facility of Wuhan University;the Large-scale Instrument and Equipment Sharing Foundation of Wuhan University

摘　　要：The escalating utilization of nuclear energy and nuclear medicine raises concerns about the environmental impact of radioactive iodine,necessitating the development of effective iodine adsorbents,especially under a real-world scenario with extremely low iodine concentration and elevated temperature.Herein,we have presented the construction of a nitrogen-abundant two-dimensional(2D)halogen-bonded organic framework,XOF-TNP,characterized by exceptional crystallinity,thermal stability,and nitrogen-rich structures.XOF-TNP exhibits strong binding to iodine,thanks to the fact that iodine can be pre-enriched into the framework through N…I interactions.The nitrogen-rich framework and I^(+) synergistically have extremely high binding force to iodine,enabling the rapid and efficient capture of iodine in both vapor and solution phases,with significant recyclability.Further flow-through adsorption experiments using an XOF-TNP-packed column achieve 99%iodine removal from hexane and aqueous solutions,surpassing traditional activated carbon.This highlights its potential for environmental remediation.XOFTNP enables the development of a novel rewritable security paper,utilizing its iodine adsorption properties to encrypt and decrypt QR codes.This research expands the application scope of halogen-bonded organic frameworks,providing insights into the design of materials for environmental remediation and security applications.

关 键 词：[N…I+…N]halogen bond halogen-bonded organic framework iodine capture security printing supramolecular assembly 

分 类 号：O641.3[理学—物理化学] O647.3[理学—化学]