Two new microporous coordination polymers constructed by ladder-like and ribbon-like molecules with cavities

Two novel microporous coordination polymers constructed by ladder-like and ribbon-like molecules with cavities: 2 1{[Zn(C8H3NO6)·(- C10H8N2)1/2·(H2O)2]·(H2O)} (1) and 2 1[Zn(C8H3NO6)·H2O] (2) are obtained through assemble of the corner ligand and the metal Zn2þ ion. The metal Zn2þ ion of the coordination polymer (1) is in trigonal bipyramid environment: two O atoms from carboxyl groups and one N atom furnishing the equatorial plane and the other two O atoms in axes sites. For coordination polymer (2), the metal Zn2þ ion center is in tetrahedron environment: three O atoms from carboxyl groups in bottom plane and another O atom from coordination water in axis site. These infinite ladder-like or ribbon-like molecules are orderly arranged to furnish hydrophilic microporous by molecular interaction and hydrogen bonds from water molecules and carboxyl groups. And their properties are studied in this paper. q 2004 Elsevier B.V. All rights reserved.