Ravikumar Maruti Vibhuti, Nipate Atul B, Deyona M Jose, Rao M Rajewara, Lakshmi Vellanki
Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Karnataka, 575025, India.
Department of Chemistry, Indian Institute of Technology Dharwad, Dharwad, Karnataka, 580007.
Chem Asian J. 2024 Dec 2;19(23):e202400808. doi: 10.1002/asia.202400808. Epub 2024 Oct 26.
Given the rapid growth of the nuclear sector, effective treatment of radioactive iodine is critical. Herein, we report the synthesis and the iodine adsorption properties of croconic acid (CTPB) and squaric acid (STPB) containing π-conjugated novel zwitterionic conjugated porous polymers (CPPs). The CPPs have been synthesized through a condensation reaction of tris(4-aminophenyl)benzene with croconic acid or squaric acid in high yields (~95 %). The ionic nature of the polymers promoted high iodine/polyiodide vapour adsorption capacity of up to 4.6 g/g for CTPB and 3.5 g/g for STPB under ambient pressure at 80 °C. The zwitterionic framework (croconic acid or squaric acid units) coupled with the aromatic units is expected to effectively capture molecular iodine (I) and polyiodides (I and I ). The iodine adsorption properties of the polymers have been studied using Fourier-Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Brauner-Emmett-Teller (BET) analysis, and Raman Spectroscopy. Besides this work, there are only three ionic units for effective iodine adsorption. This work demonstrates the importance of zwitterionic units in the porous network reported for iodine adsorption and separation.
鉴于核领域的快速发展，有效处理放射性碘至关重要。在此，我们报道了含π共轭新型两性离子共轭多孔聚合物（CPPs）的巴豆酸（CTPB）和方酸（STPB）的合成及其碘吸附性能。通过三（4 - 氨基苯基）苯与巴豆酸或方酸的缩合反应，以高产率（约95%）合成了CPPs。聚合物的离子性质促使其在80°C的环境压力下对碘/聚碘蒸气具有高达4.6 g/g（CTPB）和3.5 g/g（STPB）的高吸附容量。两性离子骨架（巴豆酸或方酸单元）与芳香单元相结合，有望有效捕获分子碘（I）和聚碘（I 和I ）。使用傅里叶变换红外光谱（FT - IR）、扫描电子显微镜（SEM）、布鲁诺尔 - 埃米特 - 泰勒（BET）分析和拉曼光谱研究了聚合物的碘吸附性能。除了这项工作外，仅有三种离子单元可实现有效的碘吸附。这项工作证明了两性离子单元在报道的用于碘吸附和分离的多孔网络中的重要性。
