A new 3D lanthanide metal-organic framework based on fluorescent whitener: Synthesis, structures, and luminescent properties

Abstract

A new 3D lanthanide metal-organic framework, [Sm(L)(Bpdc)0.5(Phen)]∞ (I) (L = 4,4′-bis(2-sulfonatostyryl)biphenyl; Bpdc = 4,4′-biphenyldicarboxylate; Phen = 1,10-phenanthroline), has been synthesized hydrothermally and characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis and single-crystal X-ray diffraction (CIF file CCDC no. 990856). Compound I crystallizes in monoclinic, space group P21/n with a = 13.070(3), b = 21.365(4), c = 14.947(3) A, β = 101.65(3)°, V = 4087.8(15) A3, ρc = 1.572 g/cm3, Z = 4, μ = 1.597 mm−1, F(000) = 1944, and the final R = 0.0573 and wR = 0.1238 for 9304 observed reflections (I > 2σ(I)). It is evident that there is a face-to-face π-π stacking interaction between each L ligand with adjacent Phen groups at a plane-plane distance of 3.482 A. The ring normal and the vector between the ring centroids form an angle of 11.6° up to centroid-centroid distances of 3.555 A. The experimental result shows that compound I exhibits good thermal stability and luminescent property.