Three coordination polymers built by quaternary-ammonium-modified isophthalic acid.

Three coordination polymers based on quaternary-ammonium-modified isophthalic acid, namely, catena-poly[[[aqua-μ-bromido-di-μ-hydroxido-methanoldinitratotetracopper(II)]-bis{μ-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}] nitrate], {[CuBr(CHNO)(NO)(OH)(CHO)(HO)]NO}, 1, poly[μ-bromido-μ-bromido-bromido-μ-hydroxido-{μ-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}tricopper(II)], [CuBr(CHNO)(OH)], 2, and poly[bromido{μ-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}zinc(II)], [ZnBr(CHNO)], 3, were obtained by solvothermal reactions. Coordination polymer (CP) 1 contains tetranuclear Cu units, in which the four Cu atoms are linked by two μ-OH groups into a Cu(OH) cluster, which are in turn linked by 5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylate (cpa) ligands into a chain structure. CP 2 also contains a tetranuclear Cu(OH) cluster and these are linked with CuBr units into chains. The chains are then connected by cpa ligands into a two-dimensional layered structure. CP 3 contains a two-dimensional layer structure built by binuclear Zn units and cpa ligands. The Br counter-anions of the quaternary ammonium groups all take part in the construction of the polymeric networks.