Abstract
•Two new Zn(II) CPs were synthesized using mixed ligand strategy.•The CPs used as photocatalyst for photodegradation of antibiotics.•Recycling experiments proves the stability of the photocatalysts in the degradation of antibiotics.
Two new Zn(II)-based coordination polymers (CPs), namely, [Zn2(L)2(2,2′-bipy)2] (1) and [Zn(L)(bib)0.5] (2) (H2L =4,4′- (1,2-phenlenebis(methyleneoxy)dibenzoic acid, 2,2′-bipy = 2,2′-bipyridine and bib=1,4-bis(1-imidazoly)benzene) were constructed by using a dual ligand strategy. The CPs are characterized by single X-ray diffraction, FT-IR, TGA and UV–visible spectroscopy. 1 exhibits 1D supramolecular chain was built by the hydrogen bond interactions between adjacent chains. 2 has 3D supramolecular network due to a coordinate bond. The photocatalytic degradation properties of the two CPs are investigated against different antibiotics like Tetracycline (TCY), metronidazole (MDZ), sulfamethazine (SMZ), nitrofurantoin (NFT), chloramphenicol (CAP), dinitrazole (DTZ), thiamphenicol (THI) and nitrofurazone (NZF). The degradation efficiency of MDZ by 1 was very high compared to other antibiotic or 2. Moreover, the possible photodegradation mechanism was proposed and explored by a radical tapping experiment.
The photocatalytic degradation properties of the two CPs are investigated against different antibiotic and the possible photodegradation mechanism was proposed and explored by radical tapping experiment. [Display omitted]