Multifunctional Zn(II) metal-organic framework fluorescent sensor to detect C6H5CHO, tetracycline, 2,4,6-trinitrophenol, fluazinam, Cr2O72- and Fe3+

A novel Zn(II) metal-organic framework (MOF) [Zn-2(Hdepa)(dya)(2)](n) (1) (H(5)depa=2,2 ',3,4 ',5-diphenyl ether pentacarboxylic, dya=2,2 '-dipyridyl amine) was successfully prepared. Single-crystal X-ray diffraction analysis indicates that MOF 1 is composed of two Zn2+ ions joining one Hdepa(4-) ion and two dya molecules, forming a 3D frame-work through hydrogen bonding. The phase purity of the MOF 1 was demonstrated by powder X-ray diffraction and IR. Interestingly, 1 has excellent fluorescence properties and thermal stability. Notably, due to its excellent fluorescence performance, the high sensitivity and selectivity of 1 enable it to be used as a fluorescence sensor to detect C6H5CHO (BZH), tetracycline (TC), 2,4,6-trinitrophenol (TNP), fluazinam (Flu), Cr2O72-, and Fe3+. In addition, the quenching process of Fe3+, TC, and BZH to MOF 1 was analyzed by fluorescence lifetime, and the fluorescence quenching mechanism of Fe3+, Cr2O72-, TNP, TC, BZH, and Flu was studied by energy transfer. CCDC: 2172003.