Inducing Structural Diversity in Anionic Metal-Tetraoxolene Coordination Polymers Using Templating Methyl Viologen Countercations

Abstract

Controlling the connectivity of coordination polymers is an important scientific goal, as the physicochemical properties of these compounds are often intimately linked to the network topology. Using redox-active methyl viologen (MeV2+) countercations, a series of one-, two-, and three-dimensional anionic coordination polymers are described in which MnII or CdII centers are bridged with tetraoxolene ligands derived from 3,6-dihalo-2,5-dihydroxy-1,4-benzoquinone (H2Xan, X = F, Cl). Using MeV2+ countercations and either MnII or CdII yields nonporous anionic diamond networks of the general composition (MeV)[M(Clan)2] in which eight-coordinate divalent metal centers are linked by Clan2- ligands. ..