Construction and luminescent sensing of a metal-organic framework based on 3,3′-Di(1H-imidazol-1-yl)-1,1′-biphenyl and 1,4-phenylenediacetic acid

Abstract

A novel Metal-Organic Framework (MOF), [Co(L)(pda)(H2O)2]·2H2O (1), had been assembled by the solvothermal method using 3,3′-di(1H-imidazol-1-yl)-1,1′-biphenyl (L) and ligand 1,4-phenylenediacetic acid (H2pda) as starting materials and coordinating with cobalt metal. 1 belongs to the P-1 space group, triclinic system, and develops from a 2D network structure to a 3D structure through hydrogen bonding. 1 was well characterized by single-crystal X-ray crystallography (SCXRD), elemental analyses (EA), infrared spectra (IR), powder X-ray diffraction (PXRD), thermogravimetric analyses (TGA), and UV-absorption spectra. The crystal texture of 1 can stably exist before 305 ℃ and is a high-temperature resistant MOF material. In the meantime, 1 also has high stability in water. Besides, the fluorescence test results revealed that 1 can effectively identify and detect small organic molecules, antibiotics, anions, and cations due to its super luminescent properties. Hence, 1 can serve as a multifunctional luminescent probe to sense acetone, sulfamethazine, CrO42-, Cr2O72-, and Fe3+.