Co(II)-Based 2D Coordination Polymer Featuring Energy Storage and Detection of Aqueous Inorganic Anions

Herein, we have synthesized a Co(II)-based 2D coordination polymer [Co(5-AIA)(Imidazole)] _<i>n</i> (<b>CP1</b>) (AIA = 5-aminoisophthalic acid) via a solvothermal approach. SCXRD (single-crystal X-ray diffraction) was utilized to analyze the crystal structure of fabricated <b>CP1</b>. Moreover, PXRD, TGA, FTIR, and SEM analyses were done to identify the structural features of fabricated <b>CP1</b>. The standard rod depiction of <b>CP1</b> exhibits <b><i>hxl</i></b> underlying net topology, and the hydrogen-bonded network depicts <b><i>hcb</i></b> underlying net topology. The fluorescence detection of inorganic anions using <b>CP1</b> showed a promising result of 90.3% for MnO₄ ^-. The electrochemical analysis of <b>CP1</b> was done under a basic medium utilizing a 3 M KOH electrolyte through CV (cyclic voltammetry) and GCD (galvanic charge-discharge) techniques which show a 134.75 F g^-1 specific capacity at a current density of 1 A g^-1. Furthermore, <b>CP1</b> shows a 94% retention capacity after 2500 cycles at a 20 A g^-1 current density.