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首页> 外文期刊>Advanced Functional Materials >Versatile Amorphous Structures of Phosphonate Metal-Organic Framework/Alginate Composite for Tunable Sieving of Ions
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Versatile Amorphous Structures of Phosphonate Metal-Organic Framework/Alginate Composite for Tunable Sieving of Ions

机译：用于离子筛分的膦酸酯金属-有机骨架/藻酸盐复合材料的通用非晶态结构。

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摘要

Versatile amorphous structures of phosphonate metal-organic framework (pMOF)/alginate composite are proposed to selectively separate alkaline and alkaline earth metal ions. Initially, the gelation of alginate by Al3+ ions provides preconfined Al3+ coordination. The phosphonate organic ligand is subsequently coordinated with Al3+ ions to make pMOF based on the preconfined Al3+ coordination. Al3+-phosphonate organic ligand complexes of pMOF are simultaneously intertwined with Al3+-alginate crosslinks with the aid of partial hydrolysis. Amorphous structures of Al3+-based pMOF/alginate composite are largely modulated, as the reaction temperature and intertwinement degree of alginate networks vary. In addition, partial hydrolysis plays an important role for amorphization, which gives rise to versatile amorphous structures. The Al3+-based pMOF/alginate composite is found to have tunable sieving of alkaline and alkaline earth metal ions with varying the degrees of intertwinement of amorphous structures and Al3+-phosphonate organic ligand complexes. In particular, a certain type of amorphous structure can effectively reject Li+ ions with small hydration energy through dehydration. Benefiting from amorphous structures, this work will provide a variety of separation opportunities accompanying unique properties and allow efficient separation of ions and similar-sized molecules.
机译：提出了膦酸酯金属-有机骨架（pMOF）/藻酸盐复合材料的通用非晶态结构，以选择性分离碱金属离子和碱土金属离子。最初，Al3 +离子对藻酸盐的胶凝作用提供了预先限定的Al3 +配位。膦酸酯有机配体随后与Al3 +离子配位以基于预先限定的Al3 +配位制备pMOF。 pMOF的Al3 +-膦酸酯有机配体配合物在部分水解的帮助下同时与Al3 +-藻酸酯交联。 Al3 +基pMOF /藻酸盐复合材料的无定形结构受到很大的调节，因为反应温度和藻酸盐网络的缠结程度各不相同。另外，部分水解对于非晶化起重要作用，这引起了通用的非晶结构。发现基于Al3 +的pMOF /藻酸盐复合物具有可调的筛分碱金属和碱土金属离子，且无定形结构和Al3 +-膦酸酯有机配体络合物的缠结程度不同。特别地，某种类型的非晶结构可以通过脱水有效地排斥具有小的水合能量的Li +离子。得益于无定形结构，这项工作将提供各种具有独特性质的分离机会，并可以有效分离离子和大小相似的分子。

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