title: A twofold interpenetrating three-dimensional Cd(II) coordination framework: poly[[μ2-1,3-bis(2-methyl-1H-imidazol-1-yl)benzene](μ3-5-nitrobenzene-1,3-dicarboxylato)cadmium(II)].
abstract: A twofold interpenetrating three-dimensional Cd(II) coordination framework, [Cd(C8H3NO6)(C14H14N4)]n, has been prepared and characterized by IR spectroscopy, elemental analysis, thermal analysis and single-crystal X-ray diffraction. The asymmetric unit consists of a divalent Cd(II) atom, one 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene (1,3-BMIB) ligand and one fully deprotonated 5-nitrobenzene-1,3-dicarboxylate (NO2-BDC(2-)) ligand. The coordination sphere of the Cd(II) atom consists of five O-donor atoms from three different NO2-BDC(2-) ligands and two imidazole N-donor atoms from two different 1,3-BMIB ligands, forming a distorted {CdN2O5} pentagonal bipyramid. The NO2-BDC ligand links three Cd(II) atoms via a μ1-η(1):η(1) chelating mode and a μ2-η(2):η(1) bridging mode. The title compound is a twofold interpenetrating 3,5-connected network with the {4(2).6(5).8(3)}{4(2).6} topology. In addition, the compound exhibits fluorescence emissions in the solid state at room temperature.
authors.affiliation: School of Chemistry & Chemical Engineering, Yancheng Teachers University, Yancheng 224002, People's Republic of China.
authors.forename: Le
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Chemistry & Chemical Engineering, Yancheng Teachers University, Yancheng 224002, People's Republic of China.
authors.forename: Jian Qing
authors.initials: JQ
authors.lastname: Tao
keywords: 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene; 5-nitrobenzene-1,3-dicarboxylic acid; TOPOS analysis; cadmium(II) complex; crystal engineering; crystal structure; photoluminescence properties; thermogravimetric analysis; three-dimensional coordination polymer; twofold interpenetrating (3,5)-connected network