Two d10 luminescent metal-organic frameworks as dual functional luminescent sensors for (Fe3+,Cu2+) and 2,4,6-trinitrophenol (TNP) with high selectivity and sensitivity

Two luminescent 3D supramolecular structures [Cd-3(L)(2)(2,2-bipy)(2)](DMF)(3)(CH3CH2OH)(2)(H2O) (1) and [Zn-3(L)(2)(2,2-bipy)(2)(DMF)(2)](DMF)(2)(CH3CH2OH)(2)(H2O) (2) (H3L = 4,4 ',4 ''-nitrilotribenzoic acid) have been successfully synthesized under solvothermal conditions using Cd(NO3)(2)4H(2)O or Zn(NO3)(2)6H(2)O as the metal sources, and 4,4 ',4 ''-nitrilotribenzoic acid (H3L), 2,2-bipy as the ligands in DMF solvent. Compound 1 displays a bi-nodal (2,3,6)-coordinated net with {8(3)}(2){8(6)12(6)16(3)}{8}(6) topology, compound 2 can be described as a (3,6)-connected 2-nodal net with kgd topology. The phase purity of compound 1 and 2 is characterized by X-ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectroscopy. Compound 1 and 2 can serve as effective luminescent sensors for Fe3+, Cu2+ and TNP via luminescent quenching.