Synthesis and properties of a new (3,8)-connected Pillar-layered Co (11)-based coordination polymer supported by tetranuclear secondary building units (SBUs)

An unusual three-dimensional Co(II)-based pillar-layered coordination polymer [Co-2(L)(bipy)(OH)(H20)ln' nCH3CN (1, H3L = 2-(2',4'-dicarboxylphenoxy)benzoic acid, bipy = 4,4'-bipyridine), has been successfully yielded via the mixed ligand approach under hydrothermal condition, and characterized carefully by elemental analysis, infrared spectra, and single crystal X-ray diffraction, and magnetic measurement. Single crystal X-ray analysis reveals that the framework of complex 1 is firstly assembled by the 2D undulated layers, and then further supported by bipy spacers into a 3D intricate framework. Topologically, 1 shows a 3D binodal (3,8)-connected qz-d net with the Schlafli symbol of (43)2(46.618-84), which is less common and rarely found in the reported literatures. Moreover, the magnetic analysis indicates that 1 exhibits the antiferromagnetic coupling interaction between Co(1l) ions. (C) 2014 Elsevier B.V. All rights reserved.