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 2-bromido-di- μ 3-hydroxido-methanoldinitratotetracopper(II)]-bis{ μ 4-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}] nitrate], {[Cu4Br(C19H28NO5)2(NO3)2(OH)2(CH4O)(H2O)]NO3}n, 1, poly[ μ 3-bromido- μ 2-bromido-bromido- μ 3-hydroxido-{ μ 4-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}tricopper(II)], [Cu3Br3(C19H28NO5)(OH)]n, 2, and poly[bromido{ μ 3-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}zinc(II)], [ZnBr(C19H28NO5)]n, 3, were obtained by solvothermal reactions. Coordination polymer (CP) 1 contains tetranuclear Cu4 units, in which the four Cu atoms are linked by two μ 3-OH − groups into a Cu4(OH)2 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 Cu4(OH)2 cluster and these are linked with CuBr3 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 Zn2 units and cpa − ligands. The Br − counter-anions of the quaternary ammonium groups all take part in the construction of the polymeric networks.

Source: Acta Crystallographica Section C - April 9, 2021 Category: Chemistry Authors: Wang, L.-F. Liu, X.-G. Meng, M.-M. Xu, Y.-K. Zhu, R. Zhang, R. Lu, Z.-Z. Huang, W. Tags: metal-organic framework MOF crystal structure quaternary ammonium zinc copper isophthalate coordination polymer research papers Source Type: research