摘要:
Five new nickel(II) coordination complexes based on macrocyclic metallic tectons and 4,4'-biphenyldicarboxylic acid ligand, namely, [(NiL1)(2)(4,4'-bpdc)(CH3CN)(2)]center dot(ClO4)(2)center dot 2CH(3)CN (1), {[(NiL1)(4,4'-bPdc)]center dot DMF center dot 4H(2)O}(n) (2) and [(NiL1)(2)(4,4'-bpdc)(H2O)(2)][(NiL1)(2)(4,4'-bpdc)(3)]center dot 14H(2)O (3), {(NiL2)(4,4'-bpdc)}(n) (4) and {[(NiL3)(4,41-bpdc)]center dot 8H(2)O}(n), (5) (L-1 = 1,3,6,8,12,15-hexaazatricycloeicosane, L-2 = 1,3,6,9,11,14-hexaazatricyclooctadecane and L-3 = 1,8-dimethy1-1,3,6,8,10,13-hexaazacyclotetradeca) have been synthesized and characterized by single-crystal X-ray diffraction. Each nickel(II) atom in complex 1 shows a [NiN5O] octahedral coordination geometry, where four nitrogen atoms from the hexaazamacrocycle ligand, one nitrogen atom from acetonitrile and one oxygen atom from the 4,4'-biphenyldicarboxylic acid ligand. However, all nickel(II) atoms in complexes 2-5 are six-coordinated with four nitrogen atoms from the hexaazamacrocycle ligand and two oxygen atoms from the 4,4'-biphenyldicarboxylic acid, resulting a [NiN4O2] octahedral coordination geometry. Complex 1 possesses an extended framework structure based on a discrete OD fragment. Complex 2 contains a 3D supramolecular structure based on two 1D chains arraying uniformly in an ABAB manner. Hydrogen-bonded 1D chains in complex 3 rise to 3D frameworks with ABCABC fashion. Complex 4 features rare plywood structure based on 1D chain. Complex 5 has a 3D framework structure bearing 1D water hexamers chains. In addition, the solid states UV-Vis for complexes 1-5 have been investigated. (C) 2014 Elsevier B.V. All rights reserved.