Abstract
•A new Zn(II) coordination polymer (CP) synthesized using mixed ligand strategy•The CP was characterized using different physico-chemical techniques•The CP used as luminescent sensor to detect antibiotics•The CP used as photocatalyst for photodegradation of dyes
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)2·6H2O 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 π···π 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 × 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.
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