The capture of radioiodine species during nuclear fuel reprocessing and nuclear accidents is crucial for nuclear safety, environmental protection, and public health. Previously reported emerging materials for iodine uptake cannot outperform commercial zeolites and active carbon under the practical dynamic scenario. Herein, we present a new design philosophy aiming at significantly enhanced specific host-guest interactions and obtain a nitrogen-rich covalent organic framework material by introducing a bipyridine group into the building block for the simultaneous capture of both iodine gas through enhanced electron-pair effect and organic iodide via the methylation reaction. These efforts give rise to not only an ultrahigh uptake capacity of 6.0 g g⁻¹ for iodine gas and a record-high value of 1.45 g g⁻¹ for methyl iodide under static sorption conditions but also, more importantly, a record-high iodine loading capability under dynamic conditions demonstrated from the breakthrough experiments.

在核燃料后处理和核事故中捕获放射性碘物种对于核安全，环境保护和公共卫生至关重要。以前报道的新兴的碘吸收材料在实际动态情况下不能超过商业沸石和活性炭。在本文中，我们提出了一种旨在显着增强特定主体与客体之间相互作用的新设计理念，并通过将联吡啶基团引入结构单元中以通过增强的电子对效应同时捕获两种碘气，从而获得了富氮共价有机骨架材料。和有机碘化物通过甲基化反应。这些努力不仅产生了对碘气体的6.0 gg ^-1的超高吸收能力，而且创下了1.45 gg的创纪录的高值。突破性实验证明，在静态吸附条件下，甲基碘的^-1值，但更重要的是，在动态条件下，碘的记录能力达到了创纪录的高水平。