Metallo-supramolecular polymers utilize the binding ability of various metal ions to form polymers of high molecular weight, and offer a convenient route to obtain organic/inorganic hybrid materials. In this study, 2,6-bis(1’-methylbenzimidazolyl) pyridine (BIP) ligand is used as the binding motif with poly(tetrahydrofuran) as the core of a ditopic macromonomer. The metal ions used are Zn2+,
... [Show full abstract] Cu2+, and Cu+, which form coordination bonds to N in the BIP ligand. BIP ligands bind the divalent metal ions in a mole ratio of 2:1 and the monovalent Cu+ in a mole ratio of 2:2. Static light scattering is applied to probe the supramolecular assembly process and determine the true molecular weight of these metallo-supramolecular polymers. Solution viscosity measurements allow determination of their molecular dimensions. By combining viscosity and computed molecular weight, the hydrodynamic radius and radius of gyration can be estimated for a specified concentration and composition. A transition between supramolecular polymer and monomeric (or oligomeric) states via switching of the oxidation state of copper can be demonstrated using viscosity measurements.