Metal-Organic framework based on N, N, N’, N’-Tetrakis(4-carboxyphenyl)-1,4-phenylenediamine: Magnetic properties and selective luminescence sensing properties and DFT calculation

Abstract

A linear fluorescent pyridyl ligand, 9,10-di(4-pyridyl)anthracene (dpa), and N,N,N’,N’-Tetrakis(4-carboxyphenyl)-1,4-phenylenediamine (H4TCPPDA) were selected as organic ligands to synthesize a new Co(II) metal–organic framework, namely {[Co2(TCPPDA)(dpa)(H2O)2]·3DMF·3H2O}n (CoMOF-s1). In the crystal structure of CoMOF-s1, the Co(II) was connected by TCPPDA4- and dpa to construct a three-dimensional framework, which features a 2, 4, 6-c network topology with the point symbol of {44.62.88.12}{44.62}{8}. Magnetic analyses revealed an overall antiferromagnetic coupling between two adjacent metal centers. Moreover, luminescence sensing experiments demonstrated that CoMOF-s1 displays highly sensitive and selectivity properties in the detection of nitrofuran antibiotics (nitrofurazone, NFZ, nitrofurantoin, NFT) with low detection limits of 0.15 μM and 0.23 μM, respectively. Furthermore, possible reasons for the quenching response were further explored by Powder X-ray diffraction (PXRD), UV–vis, and density functional theory (DFT) calculation.