Molecular receptor for binding quaternary ammonium salts and a large anion effect on the complexation

Article abstract of DOI:10.1016/S0040-4039(98)00615-7

An acyclic receptor 1 with a binding cavity surrounded by electron-rich aryl surfaces has been synthesized for binding quaternary ammonium salts through cation-π interactions. The association constants of the receptor I with salts in CDCl₃ depend on the anions due to the hydrogen bonds between the exchangeable protons in the receptor 1 and anions.