Assembly of Five Coordination Polymers Based on 5,11,17,23-Tetra-tert-butyl-25-（carboxymethoxy）- calix[4]arene Ligand

Five coordination polymers, [Co（H3L）2（dib）]. 1.5H2O（1）, [Cu（H3L）2（dib）]（2）, [Co（H2L）（mtpy）].DMF（3）, [Ni（H3L）2（mtpy）（H2O）].3DMF.H2O（4）, and [Cd（H3L）2（pybim）]. 1.5H20（5）, have been successfully prepared from 5,11,17,23-tetra-tert-butyl-25-（carboxymethoxy）calix[4]arene, metal salts, and N-donor auxiliary ligands under hydrothermal conditions[dib=l,4-di（1H-imidazol-l-yl）butane, pybim=2-（2＇-pyridyl）benzimidazole, and mtpy=4＇-（4- methylphenyl）-2,2＇：6＇,2＂-terpyridine]. Structural analysis suggests that the metal ion first joins two organic carboxy- late ligands to form the independent units, which are fulther extended by the N-donor auxiliary ligand to give the final structure. Compounds 1 and 2 display 1D infinite chains bridged by a flexible bidentate dib ligand. Compounds 3-5, with multidentate chelate ligands, reveal discrete 0D units. Furthermore, in compounds 3 and 5, 1D supramolecular architectures are exhibited due to π-π interactions.