Solvent Dependent Crystallization of Isomeric Chain Coordination Polymers in the Ce-Zn/Cd-dipic System

Abstract

Six linear chain coordination polymers containing alternating Ce IV and Zn II /Cd II coordination polyhedra are formed with dipicolinic acid (dipicH 2 ) depending upon the crystallization conditions. They belong to three isomeric types that differ in the way the tricapped trigonal prismatic polyhedra of [Ce(dpic) 3 ] 2− are linked with the Zn/Cd octahedra. The different isomers differ in complexity as reflected in their angularity and repeat units. Highly angular chains lead to porous structures, one of which incorporates a 16-water cluster.