Combined study of anion recognition by a carbazole-based neutral tripodal receptor in a competitive environment
作者:David Curiel、Guzmán Sánchez、Carmen Ramírez de Arellano、Alberto Tárraga、Pedro Molina
DOI:10.1039/c2ob06868k
日期:——
Anionrecognition studies have been carried out on a series of neutral synthetic receptors in which carbazole-2-carboxamide has been used as building block. Different ligands which include one to three carbazole units in their structure have been prepared. Binding experiments have been performed under competitive conditions in DMSO and DMSO–water solutions. The tripodalreceptor offered a better host–guest
对一系列中性合成受体进行了阴离子识别研究,其中 咔唑-2-羧酰胺已用作构建基块。已经制备了在其结构中包括1-3个咔唑单元的不同的配体。结合实验是在竞争条件下进行的二甲基亚砜 和 二甲基亚砜–水溶液。由于良好排列的氢键集的协同效应,三脚架受体提供了更好的主客关系。已经实现了对生物学上重要的焦磷酸盐阴离子的选择性反应。当研究以增加的水含量进行时,选择性提高了,在NMR实验中水含量高达20%(v / v)。该结果的意义在于使用中性受体,该中性受体通过氢键与阴离子客体专门相互作用。分析了多重均衡对所研究系统的影响。几种技术(1 H NMR,31已使用P NMR,质谱,扩散NMR,ITC,吸收和发射光谱法来更好地了解溶液中所评估受体的不同过程。