7,7′-Diamino-2,2′-diindolylmethane: A Building Block for Highly Efficient and Selective Anion Receptors-Studies in Solution and in the Solid State
作者:Paweł Dydio、Dawid Lichosyt、Tomasz Zieliński、Janusz Jurczak
DOI:10.1002/chem.201201909
日期:2012.10.22
7′‐diamino‐2,2′‐diindolylmethane was used as a building block for the construction of anion receptors operating by hydrogen bonds. Its various bisamide and bisurea derivatives were designed and synthesised as acyclic as well as macrocyclic molecules, then their structural and anion binding properties were studied in solution and in the solid state. The bisamide receptors demonstrate high affinity towards oxoanions
易于制造的7,7'-二氨基-2,2'-二吲哚基甲烷用作构建通过氢键作用的阴离子受体的基础。设计并合成了其各种双酰胺和双环脲衍生物,既有无环分子也有大环分子,然后在溶液和固态下研究了它们的结构和阴离子结合性能。双酰胺受体在高极性和部分水溶液(具有高达25%H 2的DMSO)中表现出对含氧阴离子的高亲和力O)对磷酸二氢具有显着的选择性。引人注目的是,即使在纯甲醇中,基于双脲的分子也能够结合阴离子客体,并显示出对四面体含氧阴离子(即硫酸氢根和磷酸二氢根)的选择性。X射线分析表明,两类分子在固态下均具有相似的构象:弯曲的片状,带有一个带有氢键供体的结合袋(四个用于酰胺,六个用于双担保体),其取向是特别定制的用于含氧阴离子。ROESY NMR实验的结果与固态发现相吻合,并证实双酰胺和双氨双胍都可以轻松地适应会聚氢键供体的构象,这非常适合阴离子结合。