The　most　widely　studiedof　imidazoliumcyclophanebecause　of　the　positive　charge　on　the　imidazolium,which　makes　the　C-H　activity　on　the　imidazole　ring　can　generate　hydrogen　bonds　with　the　guest　molecule　or　be　removed　in　an　alkaline　environment　to　form　carbene.Based　on　the　good　recognition　performance　o...