摘要:
Four new coordination polymers were obtained by employing polycarboxylato spacers and cationic copper(II) complexes as nodes: 2(infinity)[Cu-3(trim)(2)(NH3)(6)(H2O)(3)] (1); 1(infinity)[Cu(tmen)(dhtp)] (2), 1(infinity)[Cu(tmen)(hitp)(H2O)] (3), 1[Cu(tmen)(nitp)] (4). (H(3)trim = trimesic acid, H(2)dhtp = 2,5-dihydroxy-terephthalic acid; H(2)hitp = 5-hydroxy-isophthalic acid, H(2)nitp = 5-nitro-isophthalic acid; tmen = N,N,N',N'-tetramethyl-ethylenediamine). The crystal structures of the four compounds have been solved. Compound 1 consists of 2D coordination polymers with heart-shaped meshes, while compounds 2-4 contain infinite zigzag chains. The role of the hydrogen bond interactions in sustaining the supramolecular solid-state architectures in compounds 1 and 3 is discussed. The cryomagnetic investigation of compounds 1, 2, and 4 reveals antiferromagnetic interactions between the copper ions. (c) 2007 Elsevier Ltd. All rights reserved.