Synthesis, structure and fluorescence property of a new Zn-MOF based on a tetraphenylethane (TPE) ligand

A new 3D luminescent Zinc (II) metal-organic framework, has been solvothermally synthesized by using Zn(NO3)(2)center dot 4H(2)O and a mixture of ligands: Titpe ligand and bcpf ligand. The molecular formula is [Zn(Titpe)(bcpf)center dot(DMF)](n), (Compound 1 , Titpe = 1,1,2,2-tetrakis(4-(1H-imidazol-1-yl)phenyl)ethane, bcpf= 4,4 GREEK TONOS-sulfonyldibenzoic acid). Compound 1 crystallizes in the triclinic system, space group P-1, with a = 12.9990(9), b = 14.2181(10), c = 14.3781(10) angstrom, alpha = 89.974(4) degrees, beta = 71.640(4) degrees, gamma = 80.732(4) degrees, V = 2485.6(3) angstrom(3), Z = 2, Mr = 1039.43, Dc = 1.389 g/cm(3), mu = 0.60 0 mm(-1), F (0 0 0) = 1076.0, R = 0.0747 and wR = 0.2508 for 9724 observed reflections ( I > 2 sigma-(I)). Topology analysis shows that compound 1 is a double interpenetrating structure. In addition, due to the ligand-to-ligand charge transfer of the TPE chromophore, luminescent spectra of 1 shows that it emits strong blue light. Compound 1 can detect Fe3+ ions with high selectivity and sensitivity among diverse inorganic cations in aqueous solution and is also a highly selective sensing material for CrO42- and Cr2O72- ions. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

A new 3D luminescent Zinc (II) metal-organic framework, compound 1, with a double interpenetrating structure, has been synthesized by solvothermal method. It shows high selectivity and sensitivity in detecting Fe3+ ions in aqueous solution, and is also a highly selective sensing material for CrO42- and Cr2O72- ions.