Several　novel　acyclic　multi-site　receptors　comprising　of　imidazolium　moieties　were　synthesized　and　structurally　characterized.　All　of　these　compounds　were　characterized　through　1H　NMR,　13C　NMR,　MS　and　IR,　elemental　analysis.　The　crystal　structures　of　1,4-bis(1-　ferrocenylmethylimidazoliumylethoxy)-benzene　hexafluorophosphate　(1)　and　1,3-bis(1-ferrocenylmethylimidazoliumylethoxy)-benzene　hexafluorophosphate　(2)　were　confirmed　by　X-ray　crystallography,　it　was　clear　that　molecules　were　linked　by　C-H⋯　hydrogen　bonds　interactions　between　PF6-　and　cations.　The　anion　binding　studies　were　investigated　by　electrochemistry　and　1H　NMR　spectroscopy.　Electrochemical　behaviors　indicated　that　all　the　receptors　displayed　unique　electrochemical　sensing　property　for　F　-　in　CH3CN.　1H　NMR　titrations　demonstrated　that　all　the　receptors　have　good　fluoride　binding　ability　in　DMSO-d6　through　(C-H)+⋯X-　hydrogen　bonds.　The　flexible　receptors　1　and　2　exhibited　higher　affinity　toward　anion　than　the　rigid　receptors　3　and　4.　©　2014　Elsevier　B.V.　All　rights　reserved.