Abstract：A conjugated porous organic polymer (named LNU-15) was successfully synthesized by Sonogashira-Hagihara coupling reaction of 1,3,5-triacetylene benzene and 2,7-dibromo-9, 9-diphenyl fluorene. The skeleton decomposition temperature of LNU-15 was above 350℃, and it was insoluble in organic solvents, showing good chemical and thermal stability. The pore size distribution of LNU-15 presented uniform microporous size of 1.379nm. Because of its single open channel, a large number of strong affinity binding sites, as well as π-conjugated network structure, LNU-15 showed an excellent ability to capture iodine, with a high uptake value of 2,400mg/g. According to the pseudo-second-order kinetic equation, the adsorption rate constant of LNU-15 for iodine was 0.003g/(g×min), and the theoretical equilibrium catch was 2,490mg/g. The actual catch was 96.4% of the theoretical amount. In addition, LNU-15 could reversibly release iodine when heated in air or in ethanol solution, showing a certain cyclic stability. LNU-15 has solved the "dead space" caused by pore blockage and the difficulty for guest molecules to enter the skeleton, which can be used for environmental iodine pollution control and provide important support for the development of nuclear industry.
苏品杰, 王净, 褚阔, 罗亦夫, 孙琪琪, 董欣, 张红翠, 崔博, 闫卓君, 布乃顺. 共轭多孔有机聚合物的制备及其对核废料中碘的捕获[J]. 中国环境科学, 2023, 43(2): 568-575.
SU Pin-jie, WANG Jing, CHU Kuo, LUO Yi-fu, SUN Qi-qi, DONG Xin, ZHANG Hong-cui, CUI Bo, YAN Zhuo-jun, BU Nai-shun. Preparation of conjugated porous organic polymers and its capture of iodine from nuclear waste. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(2): 568-575.
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