Iodine fission products with high radioactivity generated in the nuclear fuel fission process usually exist in the form of two isotopes, I and I. Since radioactive iodine is difficult to be effectively disposed of in the natural physical environment, it is imperative to formulate effective coping strategies to ensure the safe use of nuclear technology. Compared with other solid iodine adsorbents, porous organic polymers (POPs) have shown satisfactory results in terms of capture capability per unit mass and reusable due to their low density and high porosity. In view of this, this study adopted the Schiff base condensation reaction with in-situ generated imines under room temperature and took non-planar piperazine-based building blocks as reactants to synthesize a flexible polymer POP-PDTR and rigid polymers POP-PDTP and POP-PDTA. Iodine adsorption experiments have verified that their adsorption capacities can reach 3.90 g/g, 3.34 g/g, and 2.59 g/g, respectively. Their excellent chemical structural stability enables them to be reused for at least 5 cycles with stable performance. The results provide a new idea for designing and synthesizing persistent organic pollutant materials with excellent chemical stability and iodine adsorption performance.

中文翻译：

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用于有效捕获碘的新型非平面哌嗪基有机多孔聚合物

核燃料裂变过程中产生的高放射性碘裂变产物通常以I和I两种同位素形式存在。由于放射性碘很难在自然物理环境中得到有效处置，因此制定有效的应对策略势在必行确保核技术的安全使用。与其他固体碘吸附剂相比，多孔有机聚合物（POPs）由于其低密度和高孔隙率，在单位质量的捕获能力和可重复使用方面显示出令人满意的结果。鉴于此，本研究采用室温下原位生成亚胺的希夫碱缩合反应，以非平面哌嗪基砌块为反应物，合成了柔性聚合物POP-PDTR和刚性聚合物POP-PDTP和POP -PDTA。碘吸附实验验证其吸附容量分别可达3.90 g/g、3.34 g/g、2.59 g/g。其优异的化学结构稳定性使其能够重复使用至少5次且性能稳定。该研究结果为设计合成具有优异化学稳定性和碘吸附性能的持久性有机污染物材料提供了新思路。