Cs-137是核能发电过程中产生的一种高释热放射性核素，其半衰期为30年，具有较持久的放射性危害，易于在生物圈迁移扩散和被生物体吸收富集，造成辐射损伤。为降低水体中放射性铯污染含量，消除对人体健康的安全风险，研究有效去除铯污染处理方法具有重要价值。本项目拟基于主客体识别和自组装技术，通过结构调控设计新颖的大环超分子主体；依据非共价键相互作用及匹配原则，系统研究硅基超分子功能杂化材料对铯的吸附分离能力，筛选出最佳超分子功能杂化材料；考察该杂化材料吸附铯及典型共存离子性能和吸附分离技术可行性，明确温度、浓度、酸度和接触时间等因素变化对铯吸附分离的影响，建立构效关系；提出从放射性废水中去除铯污染物的解决方案。基于上海同步辐射光源的X射线吸收精细结构谱(XAFS)，并结合传统光谱和单晶X射线单晶衍射等表征方法，从宏观和微观上揭示硅基超分子杂化材料吸附分离铯的机制。

Cs-137 is one of the radionuclide heat generators in spent nuclear fuel with a half-life of 30 years, which is of great concern in environment and human health. It exists in the form of cation with good solubility in aqueous solution and is easy to migrate, diffuse, and intake by organisms, resulting in more radiation damage. Thus, it is valuable to develop efficient methods to treat the radioactivie cesium. In terms of host-gust recognition and self-assembly technology, the present work will intend to design novel macrocyclic supramolecular derivatives and corresponding supramolecular hybrid materials with silica carrier for removing cesium pollutants from water environments based on screening the best known capturing materials. Then, the adsorption behaviors of cesium and other coexisted anions by supramolecular hybrid materials will be investigated, including the influence of temperature, concentration, pH values, contact time and so on. It aims to establish the relationship of structure-properties and propose a reasonable solution for deeply removing radioactive cesium pollutants from water environments. In terms of the X-ray absorption fine structure (XAFS) spectra of Shanghai Synchrotron Radiation Facility, the adsorption mechanism of cesium by supramolecular hybrid materials will be demonstrated with the help of supplementary traditional spectroscopy and single crystal X-ray diffraction techniques, which is extremely beneficial for further designing better supramolecular hybrid materials for cesium capturing.