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

Abstract

Two novel microporous coordination polymers constructed by ladder-like and ribbon-like molecules with cavities: 2 ∞ {[Zn(C 8H 3NO 6)·(C 10H 8N 2) 1/2·(H 2O) 2]·(H 2O)} ( 1) and 2 ∞[Zn(C 8H 3NO 6)·H 2O] ( 2) are obtained through assemble of the corner ligand and the metal Zn 2+ ion. The metal Zn 2+ 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 Zn 2+ 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.