A new 2D Zn(II) coordination polymer as luminescent probe for highly selective detection of nitrofurazone

Abstract

Coordination polymers (CPs) are peculiar category of materials having multidimensional framework and could be used as selective and sensitive sensors for ions and molecules. In this regard, a new Zn(II)-based coordination polymer (CP) [Zn(H2L)(H2O)2]n (1) has been derived from 1,3-bis(3,5-dicarboxylphenoxy)benzene (H4L) ligand and spectroscopically characterized alongwith single crystal X-ray diffraction. The crystallographic experiments reveal the existence of 2D layer in 1. The CP retains its framework integrity in water and exhibits luminescent property. This newly designed CP has been used as luminescent sensor to detect antibiotics by the decline in its luminescence intensity. The sensing experiments indicated that the CP displays sensitive and selective sensing against nitrofurazone (NZF) with limit of detection (LOD) of 1.12 ppm and Ksv value of 2.41 × 103 M−1. The experimentally observed decline in the luminescence intensity of 1 in presence of antibiotics has been explained with the help of theoretical calculations.