Transportation and accumulation of redox active species at the buried interfaces of plasticized membrane electrodes

Sohail, Manzar, De Marco, Roland, Jarolímová, Zdeňka, Pawlak, Marcin, Bakker, Eric, He, Ning, Latonen, Rose-Marie, Lindfors, Tom and Bobacka, Johan (2015) Transportation and accumulation of redox active species at the buried interfaces of plasticized membrane electrodes. Langmuir, 31 38: 10599-10609. doi:10.1021/acs.langmuir.5b01693

Author Sohail, Manzar
De Marco, Roland
Jarolímová, Zdeňka
Pawlak, Marcin
Bakker, Eric
He, Ning
Latonen, Rose-Marie
Lindfors, Tom
Bobacka, Johan
Title Transportation and accumulation of redox active species at the buried interfaces of plasticized membrane electrodes
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
Publication date 2015-09-14
Sub-type Article (original research)
DOI 10.1021/acs.langmuir.5b01693
Open Access Status Not Open Access
Volume 31
Issue 38
Start page 10599
End page 10609
Total pages 11
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2016
Language eng
Formatted abstract
The transportation and accumulation of redox active species at the buried interface between glassy carbon electrodes and plasticized polymeric membranes have been studied using synchrotron radiation X-ray photoelectron spectroscopy (SR-XPS), near edge X-ray absorption fine structure (NEXAFS), in situ electrochemical Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectroscopy, cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). Ferrocene tagged poly(vinyl chloride) [FcPVC], ferrocene (Fc), and its derivatives together with tetracyanoquinodimethane (TCNQ) doped plasticized polymeric membrane electrodes have been investigated, so as to extend the study of the mechanism of this reaction chemistry to different time scales (both small and large molecules with variable diffusion coefficients) using a range of complementary electrochemical and surface analysis techniques. This study also provides direct spectroscopic evidence for the transportation and electrochemical reactivity of redox active species, regardless of the size of the electrochemically reactive molecule, at the buried interface of the substrate electrode. With all redox dopants, when CA electrolysis was performed, redox active species were undetectable (<1 wt % of signature elements or below the detection limit of SR-XPS and NEXAFS) in the outermost surface layers of the membrane, while a high concentration of redox species was located at the electrode substrate as a consequence of the deposition of the reaction product (Fc+-anion complex) at the buried interface between the electrode and the membrane. This reaction chemistry for redox active species within plasticized polymeric membranes may be useful in the fashioning of multilayered polymeric devices (e.g., chemical sensors, organic electronic devices, protective laminates, etc.) based on an electrochemical tunable deposition of redox molecules at the buried substrate electrode beneath the membrane.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Chemistry and Molecular Biosciences
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Created: Mon, 28 Sep 2015, 08:53:13 EST by Prycilla Rehm on behalf of School of Chemistry & Molecular Biosciences