Rare Supramolecular Assemblies of a Dicopper (II)-tetracarboxylate Stabilized by (Methanol)6, Dimethyl Sulfoxide and 4,4’-Azobipyridyl Bridges

摘要

Two new supramolecular assemblies formed by [Cu2(Hdiphba)4] (H2diphba=4-hydroxy-3,5-di-iso-propylbenzoic acid) in protic and aprotic solvents have been investigated. Methanol gives rise a 3D hydrogen-bonded network comprised of [Cu2(Hdiphba) 4] and extremely rare twisted-boat methanol cyclohexamer synthons. While, dimethyl sulfoxide (DMSO), an aprotic solvent, gives a 2D assembly in which DMSO bridges [Cu2(Hdiphba)4] units to form 1D rectangular channels, entrapping guest DMSO arranged in a zig-zag chain. The solvent molecules could be replaced with neutral N,N’-donor linkers to form 1D coordination polymers.