Conducting metallopolymers based on azaferrocene.

TitleConducting metallopolymers based on azaferrocene.
Publication TypeJournal Article
Year of Publication2006
AuthorsByrne, PD, M\üller, P, Swager, TM
Date Publisheddec
KeywordsAza Compounds, Aza Compounds: chemistry, Electric Conductivity, Ferrous Compounds, Ferrous Compounds: chemistry, Molecular Conformation, Organometallic Compounds, Organometallic Compounds: chemical synthesis, Organometallic Compounds: chemistry, Oxidation-Reduction, Polymers, Polymers: chemical synthesis, Polymers: chemistry

A series of 2,5-thiophene-substituted 1',2',3',4',5'-pentamethylazaferrocene complexes were synthesized and electropolymerized to produce polymers with fully pi-conjugated backbones. The length and hence oxidation potential of the conjugated linker (the thiophene fragments) between the metal centers were varied to understand the influence of the metal-metal interactions on the overall electroactivity of the resulting polymer. These complexes were electrochemically polymerized, and the resulting polymers were characterized by cyclic voltammetry, in situ conductivity, and spectroelectrochemistry measurements. The iron-centered oxidations significantly increased the conductivity of the polymer. The results reveal that shorter conjugated linkers cause the onset of conductivity to occur at lower potentials. This effect implies that a superexchange mechanism is likely operative in the charge migration of these polymers.