3,5-Dibromosalicylaldehyde nicotinoylhydrazone and 4,4'-bipyridine appended new Zn(II) Coordination Polymer: Secnidazole sensing and Rhodamine B photocatalytic degradation properties

Coordination polymers (CPs) are assorted class of multidimensional materials that could be deployed as sensors and photocatalysts against the photodegradation of aromatic dyes existing in the waste-water discharge. Herein, a new Zn(II)-based coordination polymer (CP) [Zn(dsn)(4,4'-bipy)0.5] ( 1 ) has been synthesized by reacting Schiff base ligand 3,5-dibromosalicylaldehyde nicotinoylhydrazone (dsn) and 4,4'-bipyridine (4,4'-bipy) with Zn(NO3)(2)center dot 6H(2)O and characterized using elemental analysis, FTIR, TGA, powder X-ray diffraction and single crystal X-ray diffraction techniques. The single crystal X-ray diffraction studies revealed tetragonal pyramidal geometry around Zn(II) and the architecture of 1 is stabilized by 7rmiddotmiddotmiddot7r interactions operating between pyridine ring of dsn and 4,4'-bipy. Also, other weak non-conventional weak interactions provide stability and engender supramolecular three dimensional framework in 1 . The CP has been used as fluorescent sensor to detect antibiotics and exhibits selective sensing of secnidazole (SIZ) with limit of detection (LOD) 8.59 x 10(-7) M. This showcase of 1 can act as an efficient and selective sensor for SIZ even in presence of other antibiotics. Also, the CP has been used as photocatalyst for photodegradation of Rhodamine B (Rh B) and degrades 80% of Rh B in 100 min. The plausible mechanism employing which CP 1 executed sensing of secnidazole (SIZ) and photocatalysis of Rh B have been explained with aid of theoretical calculations. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

In this study, a new Zn(II)-based coordination polymer (CP) was synthesized and characterized, showing potential as a fluorescent sensor and photocatalyst.