A stable fluorescent Cd(II)-MOF for luminescent sensing of Fe3+, Cr6+and nitrofurazone antibiotic in aqueous solution

AbstractA large amount of wastewater containing Fe3+, Cr6+ ions and Nitrofurazone antibiotic are poured into the environment resulting in water pollution. A new sensor, [Cd(HPA)(3-bpmh)]n (1), based on 3-bpmh ligand (3-bpmh = N,N'-bis-pyridin-3-ylmethylene-hydrazine) and H2HPA (H2HPA = Homophthalic acid) is studied in this paper. X-ray crystallography shows Cd-MOF in triclinic system with space group Pī. PXRD experiment, infrared spectra, and thermogravimetric analysis were tested and fluorescence experiments proved that it can be used to detect Fe3+, Cr6+ and Nitrofurazone antibiotic in water. The Cd-MOF fluorescence sensor has excellent selectivity and high sensitivity, which is of great significance for the development of metal organic framework materials in luminescence sensing. The possible mechanism is also discussed in this work.Keywords: Crystal structuremechanismmetal-organic frameworkluminescent probepollutant detection Disclosure statementThe authors declare that the experimental data are from our research group, and the expected results of the experiment have no conflict of interest with others, and are all from the original.Additional informationFundingThis project is supported by Anhui Provincial Teaching Demonstration Course (2020sjjxsfk1498), Anqing Normal University Quality Engineering Project (2020aqnujyxm14), and Anqing Normal University Graduate Innovation Project (2021yjsxscx099). Anhui university student innovation plan (s202110372035) also contributed to this project.