Lanthanide Discrimination with Hydroxyl-Decorated Flexible Metal–Organic Frameworks,Inorganic Chemistry

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Lanthanide Discrimination with Hydroxyl-Decorated Flexible Metal–Organic Frameworks
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-10-16 00:00:00 , DOI: 10.1021/acs.inorgchem.8b02409
Marta Mon ₁ , Rosaria Bruno ₂ , Rosangela Elliani ₂ , Antonio Tagarelli ₂ , Xiaoni Qu _{1,

3} , Sanping Chen ₃ , Jesús Ferrando-Soria ₁ , Donatella Armentano ₂ , Emilio Pardo ₁

Affiliation

We report two new highly crystalline metal–organic frameworks (MOFs), derived from the natural amino acids serine (1) and threonine (2), featuring hexagonal channels densely decorated with hydroxyl groups belonging to the amino acid residues. Both 1 and 2 are capable of discriminating, via solid-phase extraction, a mixture of selected chloride salts of lanthanides on the basis of their size, chemical affinity, and/or the flexibility of the network. In addition, this discrimination follows a completely different trend for 1 and 2 because of the different locations of the hydroxyl groups in each compound, which is evocative of steric complementarity between the substrate and receptor. Last but not least, the crystal structures of selected adsorbates could be resolved, offering unprecedented snapshots on the capture process and enabling structural correlations with the separation mechanism.

中文翻译：

用羟基修饰的柔性金属有机框架区分镧系元素

我们报告了两个新的高度结晶的金属有机框架（MOF），它们衍生自天然氨基酸丝氨酸（1）和苏氨酸（2），其特征是六角形通道密集地装饰有属于氨基酸残基的羟基。既1和2是能够区分的，通过固相萃取，它们的尺寸，化学亲合性，和/或网络的灵活性的基础上的镧系元素中选择的氯化物盐的混合物。此外，这种区分遵循1和2完全不同的趋势因为每种化合物中羟基的位置不同，这表明底物和受体之间的空间互补性。最后但并非最不重要的一点是，可以解析所选吸附物的晶体结构，从而为捕获过程提供空前的快照，并实现与分离机制的结构相关性。

更新日期：2018-10-16

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