Neodymium(III) organic frameworks (Nd-MOF) as near infrared fluorescent probe for highly selectively sensing of Cu2+

Abstract A novel neodymium-organic framework (Nd-MOF) based on Nd(III) dinuclear nodes, with formula {[Nd2(NH2-BDC)3(DMF)4]}n (1) (NH2-BDC = 2-aminoterephthalic acid), was synthesized under solvothermal conditions, characterized by fourier transform infrared spectrum measurements, thermogravimetric analysis, powder X-ray diffraction and single crystal X-ray diffraction. The structure of 1 is octahedral networks constructed by infinite connection of the cube units, in which each cube unit is formed by using the neodymium dinuclear nodes linked via the NH2-BDC ligands as the vertexes, then the eight vertexes are joined each other by the NH2-BDC ligands again to give a cube unit. Photoluminescence measurement indicates that 1 exhibits excellent near infrared luminescence. In addition, 1 displays rapid and selective sensing of Cu2 +, which represents the first near infrared fluorescent probe of MOFs used for detection.