Zr-based metal-organic frameworks with tailored linkers: Immobilized liquids for sorption, extraction and ionic conduction

目标是在金属有机框架（mof）的孔隙中创造一种类似液体的相，并将其用于分子和离子的运输。这是基于这样一种观点，即有机构建块（连接体）的侧链填充孔隙，形成一种相的纳米液滴，就其顺序而言，这种相类似于液体，然而，主要区别在于，通过连接体的锚定抑制了翻译。这就是为什么我们用“固定液体”这个词。固定化抑制液体泄漏和微相分离。孔隙的规则排列为要运输的物种提供了能量均匀的路径，框架的刚度强烈地限制了液体的膨胀和收缩。这些性质对吸附、萃取和离子传导具有重要意义。将在这些过程中探索具有固定化液体的mof。我们的重点是UiO和PIZOF类型的zr - mof。侧链将为应用量身定制：疏水，亲水，亲氟吸附和提取；聚醚用于Li+导电；质子传导的原生基团聚醚。它们可以在MOF合成前附着在连接体上，也可以通过MOF的合成后修饰引入。

The goal is to create a liquid like phase within the pores of metal-organic frameworks (MOFs) and to use it for the transport of molecules and ions. This is based on the idea that the side chains of the organic building blocks (linkers) fill the pores and form a nanodrop of a phase which in respect to its order resembles a liquid, however, with the main difference that translation is inhibited through the anchoring at the linkers. This is why we use the term immobilised liquids. The immobilisation inhibits leakage of the liquid and microphase separation. The regular arrangement of the pores offers energetically homogeneous paths for species which are to be transported, the stiffness of the framework strongly limits swelling and shrinkage of the liquid. These properties are of significant importance for sorption, extraction and ion conduction. The MOFs with immobilised liquids will be explored in respect to these processes. Our focus will be on Zr-MOFs of the UiO and PIZOF type. The side chains will be tailored for the application: hydrophobic, hydrophilic, fluorophilic for sorption and extraction; polyether for Li+ conduction; polyether with protogenic groups for proton conduction. They will either be attached to the linkers before the synthesis of the MOF or introduced by postsynthetic modification of the MOFs.