A water-stable Zn (II) coordination polymer as a fluorescence sensor for multifunctional detection of Cefixime in milk, honey, beef and chicken

A new Zn (II) coordination polymer, {[Zn(dia)(bpeh)]·3H₂O} (CP 1), was synthesized by solvothermal method by a mixed ligand of H₂dia and bpeh (H₂dia = 5-(dimethylamino)isophthalic acid, bpeh = (1E,2E)-1,2-bis(1-(pyridin-4-yl)ethylidene)hydrazine). CP 1 can be used as a fluorescence sensor with excellent fluorescence characteristics, which can selectively and sensitively identify Cefixime (CFM) antibiotic in aqueous solutions via luminescence quenching effects and has a low detection limit. In addition, CP 1 is the first example of a novel fluorescent probe material capable of sensitively detecting CFM antibiotic in multiple food samples. The possible fluorescence quenching mechanism has also been explored, which can be attributed to the internal filtration effect and photoelectron electron transfer.