Metal–organic frameworks based on naphthalene-1,5-diyldioxy-di-acetate: structures, topologies, photoluminescence and photocatalytic properties

Abstract

Using a novel hemi-rigid ditopic ligand, naphthalene-1,5-diyldioxy-di-acetic acid (H2L), five metal(II)-complexes formulated as Mn(L)(DMF) (1), Cd(L)(H2O)2 (2), Pb(L)(DMF) (3), Cd(L)(phen) (phen = phenanthroline) (4) and Cd5(L)5(2,2′-bpy)2 (2,2′-bpy = 2,2′-bipyridine) (5) have been hydro(solvo)thermally synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 features a 4-nodal (4,6)-connected three-dimensional (3D) network with an unusual (42.63.8)(45.6)(48.66.8)2 topology, complex 2 exhibits a uninodal 3-connected two-dimensional (2D) framework with a (82.10) topology, complex 3 shows a 2-nodal (3,4)-connected 3D fsh-3,4-P21/c net with a (83)2(85.10) topology, complex 4 presents a 2-nodal 3D architecture with (42.84)-ptS topology, and complex 5 shows a novel 6-nodal (3,4,5,6)-connected 3D framework with an unusual (42.6)2(42.83.10)(43.62.85)2(43.62.8)2 (45.6.84)2(46.87.102) topology. H2L displays different coordination modes in the five complexes. Complexes 1–3 are hybrid metal oxides based on extended inorganic metal–oxygen–metal chains. The H2L ligand has the preference for the formation of M–O–M linkage in the absence of a N-donor. Complex 1 exhibits antiferromagnetic property and complexes 2–5 show different photoluminescence and photocatalytic properties.