Rhodamine Cyclen-based fluorescent chemosensor for the detection of Cd2+

Abstract

A chemosensor based on a rhodamine-hydroxamate platform containing a pyridine and a cyclen binding units has been developed for the detection of Cd2+ in aqueous solutions. The probe responds selectively toward Cd2+ over other biologically relevant metal ions. The fluorescent probe shows 1:1 binding stoichiometry and the detection limit for Cd2+ in water proved to be as low as 25 nM.