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Selective Binding and Precipitation of Cesium Ions from Aqueous Solutions: A Size‐Driven Supramolecular Reaction
Chemistry - A European Journal ( IF 4.3 ) Pub Date : 2018-02-05 , DOI: 10.1002/chem.201706181
Ravell Bengiat 1 , Benny Bogoslavsky 1 , Daniel Mandler 1 , Joseph Almog 1
Affiliation  

The nuclear disasters of Chernobyl and Fukushima presented an urgent need for finding solutions to treatment of radioactive wastes. Among the by‐products of nuclear fission is radioactive 137Cs, which evokes an environmental hazard due to its long half‐life (>30 years) and high solubility in water. In this work, a water‐soluble organic ligand, readily obtained from alloxan and 1,3,5‐benzenetriol, has been found to selectively bind and precipitate Cs+ ions from aqueous solutions. The special rigid structure of the ligand, which consists of a “tripodal” carbonyl base above and below an aromatic plane, contributes to the size‐driven selectivity towards the large Cs+ ions and the formation of a giant, insoluble supramolecular complex. In addition to the low costs of the ligand, high yields and effectiveness in precipitating Cs+ ions, the Cs‐complex revealed a high endurance to continuous doses of γ‐radiation, increasing its potential to act as a precipitating agent for 137Cs.

中文翻译:

铯离子从水溶液中的选择性结合和沉淀:大小驱动的超分子反应

切尔诺贝利核电站和福岛核电站核灾难迫切需要寻找解决放射性废物的解决方案。核裂变的副产物是放射性137 Cs,由于其半衰期长(> 30年)和在水中的高溶解度,因此对环境造成危害。在这项工作中,发现一种容易从四氧嘧啶和1,3,5-苯三醇中获得的水溶性有机配体可以选择性地结合水溶液中的Cs +离子并使其沉淀。配体的特殊刚性结构由在芳族平面上方和下方的“三脚架”羰基碱基组成,有助于尺寸驱动对大Cs +的选择性。离子并形成巨大的不溶性超分子复合物。除了配体的低成本,高收率和沉淀Cs +离子的有效性外,Cs复合物还显示出对连续剂量γ辐射的高耐受力,从而增加了其作为137 Cs沉淀剂的潜力。
更新日期:2018-02-05
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