title: Redox Properties of Polyvinylamine-g-TEMPO in Multilayer Films with Sodium Poly(styrenesulfonate).
abstract: Layer-by-layer (LbL) assemblies of polyvinylamine with grafted TEMPO moieties (PVAm-T) with sodium polystyrenesulfonate (PSS) were prepared on gold-sulfonate surfaces, and the redox properties were measured by cyclic voltammetry. LbL compositions were probed by quartz crystal microbalance (wet) and ellipsometric (dry) film measurements. Approximately 30% of the TEMPO moieties in the LbL assemblies were redox-active when the total TEMPO coverage was varied up to 6 μmol/m2, by either varying the TEMPO content in PVAm-T or by varying the number of LbL bilayers. Three non-redox-active PVAm/PSS blocking bilayers were required to prevent the electrode from oxidizing PVAm-T in the exterior LbL layer. This suggests significant intermixing between the layers in the LbL film. In addition to contributing to the small but growing body of work on redox polymers based on grafted TEMPO, this work serves as a reference point for understanding the redox properties of colloidal PVAm-T-laccase complexes in future work.
authors.affiliation: Department of Chemical Engineering and ‡Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario Canada , L8S 4L7.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
authors.affiliation: Department of Chemical Engineering and ‡Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario Canada , L8S 4L7.
authors.forename: Igor
authors.initials: I
authors.lastname: Zoudanov
authors.affiliation: Department of Chemical Engineering and ‡Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario Canada , L8S 4L7.
authors.forename: Emil
authors.initials: E
authors.lastname: Gustafsson
authors.affiliation: Department of Chemical Engineering and ‡Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario Canada , L8S 4L7.
authors.forename: Dong
authors.initials: D
authors.lastname: Yang
authors.affiliation: Department of Chemical Engineering and ‡Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario Canada , L8S 4L7.
authors.forename: Leyla
authors.initials: L
authors.lastname: Soleymani
authors.affiliation: Department of Chemical Engineering and ‡Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario Canada , L8S 4L7.
authors.forename: Robert H
authors.identifier: http://orcid.org/0000-0002-8006-0745
authors.initials: RH
authors.lastname: Pelton
keywords: EQCM-D; TEMPO; cyclic voltammetry; polyelectrolyte multilayers; redox polymers