Luo Dan, He Yanlei, Tian Jinya, Sessler Jonathan L, Chi Xiaodong
State Key Laboratory of Materials Processing and Die & Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States.
J Am Chem Soc. 2022 Jan 12;144(1):113-117. doi: 10.1021/jacs.1c11731. Epub 2021 Dec 28.
The ability to capture radioactive iodine species is crucial for nuclear accident preparedness and nuclear waste treatment; however, it remains a challenge. Here we report a new readily obtainable nitrogen-rich nonporous cage () based on bipyridine building blocks that supports iodine capture. This cage is able to capture not only volatile iodine in vapor form but also iodine dissolved in various organic solvents or aqueous media with an iodine uptake capacity of up to 3.23 g g. The iodine within the cage () can be released quickly upon immersing the bound solid form in DMF, allowing for control over acylation reactions. The cage solids reported here could be reused several times without substantial loss in their iodine capture performance. The effectiveness of the present system is ascribed to its ability to support strong iodine-bipyridine nitrogen lone pair interactions.
捕获放射性碘物种的能力对于核事故应急准备和核废料处理至关重要；然而，这仍然是一项挑战。在此，我们报告一种基于联吡啶构建块的新型易于获得的富氮无孔笼状物（），其支持碘捕获。这种笼状物不仅能够捕获气态形式的挥发性碘，还能捕获溶解于各种有机溶剂或水性介质中的碘，碘吸收容量高达3.23 g g。将结合有碘的固体形式浸入N，N - 二甲基甲酰胺（DMF）中时，笼状物（）内的碘可快速释放，从而实现对酰化反应的控制。此处报道的笼状固体可重复使用数次，而其碘捕获性能不会有实质性损失。本系统的有效性归因于其支持碘与联吡啶氮孤对之间强相互作用的能力。
