A new porous three-dimensional lanthanide coordination polymer

Abstract

The open-framework coordination polymer [Er(C9H9-O6)(H2O)2]·2.5H2O (C9H9O6 = cis,cis-1,3,5-cyclohexanetricarboxylate) has been synthesized under hydrothermal conditions. Each Er ion is coordinated to nine oxygen atoms belonging to two water molecules and five carboxylate ligands. Its 3-D polymeric structure possesses channels containing the guest water molecules that can be removed to afford a porous material [Er(C9H9O6)(H2O)2]. The metalorganic framework in [Er(C9H9O6)(H2O)2] can withstand the removal of 1 equiv of coordinated water.