Sodium thiocyanate binding by a 3-aminobenzoic acid based ion pair receptor consisting of a thiourea binding domain

摘要

AbstractThe ability to recognize weakly coordinating thiocyanate anion was studied using 3-aminobenzoic acid based ion pair receptor (1) consisting of thiourea and crown ether binding domains. UV–Vis and1H NMR spectroscopic measurements carried out in acetonitrile showed that receptor1, unlike its urea analog2, is able to effectively associate weakly coordinating thiocyanate anion (TBASCN) and exhibits a more than six-fold enhancement in the presence of sodium cations (NaSCN). Data obtained from in-solution measurements are in agreement with the X-ray analysis of1·NaSCNcomplex and confirms effective sodium thiocyanate association by receptor1. In the solid state, thiocyanate anion and sodium cation interact directly with the corresponding binding domains.Graphical abstractDisplay OmittedHighlights?Ion pair receptors based on 3-aminobenzoic acid units were investigated.?Thiourea based receptor is able to bind weakly coordinating thiocyanate anion.?Sodium cation coordination is responsible for enhanced thiocyanate binding.]]>