Zn- and Cd-based Coordination Polymers Offering H-Bonding Cavities: Highly Selective Sensing of S2 O7 2- and Fe3+ Ions

Abstract

We present two Zn^II - and Cd^II -based coordination polymers (CPs), L-Zn and L-Cd, offering H-bonding-based cavities of varying dimensions. Both CPs were used for the highly selective detection of S₂ O₇ ^2- and Fe³⁺ ions where H-bonding based cavities played an important role. Fluorescence quenching, competitive binding studies and binding parameters substantiated significant recognition of S₂ O₇ ^2- and Fe³⁺ ions by both CPs.

Keywords: Coordination polymers; Fluorescence; Hydrogen bonds; Iron; Pyrosulfate; Sensors.