design and synthesis of a novel bis-benzimidazolyl podand as a responsive chemosensors for anions

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).