Design and Synthesis of A Novel Bis-Benzimidazolyl Podand As a Responsive Chemosensors for Anions

Abstract

A novel podand based anion receptor bearing benzimidazole motifs as recognition sites was designed and synthesized by reaction of 1,7-bis(2'-methylbenzoate)-1,4,7-trioxaheptane and phenylenediamine. The binding properties of anionic guest with this receptor were studied using UV-Vis and fluorescence spectroscopy. These studies revealed that this receptor exhibit selective recognition towards F^-ionamong other anions such as HSO₄^-, ClO₄^-, Cl^-, Br^-and I^- in methanol through intermolecular hydrogen bonding of guest and host. Also, we have focused our attention on the receptor-F^-with theoretical computation based on DFT/B3LYP/6-31G(d).