The development of synthetic receptor for cation and anion recognition have attracted considerable attention in recent years within the field of supramolecular chemistry due to the fact that a large number of biological processes involve molecular recognition.The leading issue in the design of any active chemosensor is the connotation of a selective molecular recognition event with a physical signal highly sensitive to its occurrence. Fluorescence technique is commonly considered superior than other electrochemical techniques because of its low detection limits for trace chemical detection,...