芳酰基硫脲受体的合成及对阴离子识别研究

Synthesis of Anion Receptors Based on Aroylthiourea and Their Anion Recognition

设计合成了3种芳酰基硫脲受体分子.利用紫外-可见吸收光谱考察了其与F-,Cl-,Br-,AcO-,HSO-4,H2PO-4等阴离子的作用.结果表明该类受体分子与阴离子形成氢键配合物.加入F-,AcO-时,溶液立刻由无色变为黄色,而加入其它阴离子则无变化,从而实现对这两种阴离子的裸眼识别.结果表明受体分子与阴离子间形成1∶1型的配合物.1HNMR滴定及质子溶剂效应为受体分子与阴离子间的氢键作用本质提供了直接依据.

Three new aroylthiourea receptors were synthesized.The binding properties of the receptors with anions such as F^-,Cl^-,Br^-,AcO^-,HSO4^- and H2PO4^- were examined by UV-Vis spectroscopy methods.The results showed that hydrogen-bonding complexes were formed between receptors and anions.The color was changed from colorless to yellow upon addition of F^- and AcO^- to the solution of the three receptors,which was perceptible to recognition by naked eye.However,no obvious color changes were observed on addition of the other anions.The results indicated that a 1∶1 stoichiometry complex was formed between compounds and anions,while ^1H NMR titrations and solvate effect confirmed hydrogen-bonding interaction between the receptors and anions.