Syntheses, characterization and crystal structure of d10 coordination architectures: From 1D to 3D complexes based on mixed ligands

Abstract

Three coordination polymers, namely, [Zn2(ndd)2(2,2′-bpy)2·2H2O]n (1) [Cd(ndd)(2,2′-bpy)]n (2), and [Cd(ndd)(1,4-pyb)]n (3), where H2ndd=2,2′-(naphthalene-1,5-diylbis(oxy))diacetic acid, 1,4-pyb=1,4-bis(pyridin-4-ylmethoxy)benzene and 2,2′-bpy=2,2′-bipyridine, have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analyses, powder X-ray diffraction and thermogravimetric analysis. Compound 1 can be considered as a 1D chain, which is further linked through the strongly multiple π–π interactions into a 3D supramolecular structure. By changing the metal ions, compound 2 is the 2D square structure (10.96×15.20Å) with the 44·62 topology. By changing the auxiliary ligand, compound 3 presents a new (4,5)-connected 3D network with the point symbol of (42·65·83)2·(66). Furthermore, compounds 1–3 show good fluorescence properties in the solid state at room temperature.