A pillar5arene-based molecular grapple of hexafluorophosphate

摘要

A symmetric pillararene-based receptor containing ten triazole units was synthesized.Interestingly,it formed 1:1 complexes instead of 1:2 with different halide anions.This was caused by the cooperative multivalent hydrogen-bond interactions between the triazole protons on one side of the receptor and the halide anion,which changed its structure from pillar to conical.However,by the regulation of the effector F-,it can work like an excavator grapple selectively grasps a PF6-anion.