In view of the excellent stability, ultra-high specific surface area, and structural versatility, porous aromatic frameworks (PAFs) have shown promising potential in gaseous iodine adsorption. Herein, PAF-1 and PAF-5 were synthesized with high specific surface areas. Amino groups as effective binding sites were introduced to these frameworks through post-modification, which facilitated a shift from simple physical adsorption of iodine vapor to a more robust chemical adsorption process. Meanwhile, PAF-6 was synthesized from nitrogen-rich monomers to demonstrate the role of N-binding site in iodine adsorption. PAF-6 exhibited the highest iodine adsorption capacity, verifying the critical role of N-adsorption active sites. The synthesis of nitrogen-rich porous material show advantages over post-modification in creating effective iodine adsorbents. This work highlights the potential of PAFs as a promising material for the adsorption and fixation of radioactive iodine.

中文翻译：

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多孔芳香骨架的氨基官能化可实现高效稳定的碘吸附

鉴于优异的稳定性、超高比表面积和结构多功能性，多孔芳香骨架（PAF）在气态碘吸附方面显示出广阔的潜力。在此，合成了具有高比表面积的PAF-1和PAF-5。通过后修饰将氨基作为有效的结合位点引入到这些框架中，这促进了从简单的碘蒸气物理吸附到更强大的化学吸附过程的转变。同时，由富氮单体合成PAF-6，以证明氮结合位点在碘吸附中的作用。 PAF-6表现出最高的碘吸附能力，验证了N吸附活性位点的关键作用。富氮多孔材料的合成在制造有效的碘吸附剂方面显示出优于后改性的优势。这项工作凸显了 PAF 作为一种有前途的吸附和固定放射性碘材料的潜力。