An Ultrastable Metal–Organic Framework with Open Coordinated Sites Realizing Selective Separation toward Cationic Dyes in Aqueous Solution,Crystal Growth & Design

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An Ultrastable Metal–Organic Framework with Open Coordinated Sites Realizing Selective Separation toward Cationic Dyes in Aqueous Solution
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2017-08-29 00:00:00 , DOI: 10.1021/acs.cgd.7b00984
Meng-Ke Wu ₁ , Fei-Yan Yi _{1,

2} , Yuan Fang ₁ , Xun-Wen Xiao ₃ , Shi-Cheng Wang ₁ , Lu-Qing Pan ₁ , Shuai-Ru Zhu ₁ , Kai Tao ₁ , Lei Han ₁

Affiliation

A novel Zn-based metal–organic framework (MOF) was synthesized from the mixed ligands, 3,3′,5,5′-azoxybenzenetetracarboxylic acid (H₄AOBTC) and 1,4-bis(1H-benzo[d]imidazol-1-yl)benzene (phenDIB) ligand. The crystal structure of the complex exhibits an interpenetrated three-dimensional framework that can be simplified as a (4,4)-connected 2-nodal bbf net. This MOF displays extraordinary thermostability in boiling water for 12 h and chemical stability in a wide pH range of 2–13. The most intriguing feature is that it can successfully separate cationic dyes from mixed dye molecules in aqueous solution with high effectivity and selectivity, even for rhodamine B molecule with a large size. Furthermore, this material is reusable, and the adsorbed dye molecules can be released and recovered completely. It is very important for the practical application from a view of environmental protection and resource recycling.

中文翻译：

具有开放式协调位点的超稳定金属有机框架，可实现水溶液中阳离子染料的选择性分离

由混合的配体3,3'，5,5'- carboxylic氧基苯四甲酸（H ₄ AOBTC）和1,4-双（1 H-苯并[d] ）合成了新型的锌基金属有机骨架（MOF）。咪唑-1-基）苯（phenDIB）配体。配合物的晶体结构表现出互穿的三维构架，该构架可以简化为（4,4）连接的2-节点bbf网。该MOF在沸水中12小时显示出非凡的热稳定性，在2-13的宽pH范围内显示化学稳定性。最吸引人的特点是，即使对于大尺寸的若丹明B分子，它也可以成功地从水溶液中的混合染料分子中成功分离出阳离子染料，并且具有很高的效率和选择性。此外，这种材料是可重复使用的，吸附的染料分子可以完全释放和回收。从环境保护和资源循环利用的角度看，对于实际应用非常重要。

更新日期：2017-08-29

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