Bicontinuous microemulsions as media for electrochemical studies

Journal Article · Thu Mar 15 00:00:00 EST 1990 · Analytical Chemistry (Washington); (USA)

DOI:https://doi.org/10.1021/ac00205a021· OSTI ID:6279891

Iwunze, M O; Sucheta, A; Rusling, J F ^[1]

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1. Univ. of Connecticut, Storrs (USA)

Biocontinuous microemulsions of didodecyldimethylammonium bromide (DDAB)/dodecane/water were explored as media for voltammetric reductions and oxidations of ruthenium(III) hexaammine, ferrocyanide, ferrocene, cob(II)alamin, and several polycyclic aromatic hydrocarbons (PAHs). These clear microemulsions are conductive and are believed to contain a dynamic extended network of interconnected water tubules. Agreement of simulated and experimental voltammetric data shows that electrochemical theory for homogeneous media is followed to a good approximation in DDAB microemulsions. Diffusion of electroactive solutes did not reflect the high bulk viscosities of the microemulsions. Nonpolar molecules and ions diffuse as if they were in neat oil or aqueous media, respectively, and voltammograms with good signal to noise ratio are obtained. Reductions of PAHs in the microemulsions occurred by an ECE-type pathway, with nearly reversible one-electron reductions achieved at high scan rates.

• OSTI ID: 6279891
• Journal Information: Analytical Chemistry (Washington); (USA), Vol. 62:6; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
VOLTAMETRY
MEASURING METHODS
ELECTROCHEMISTRY
MICROEMULSIONS
POLYCYCLIC AROMATIC HYDROCARBONS
RUTHENIUM COMPLEXES
SIGNAL-TO-NOISE RATIO
AROMATICS
CHEMISTRY
COLLOIDS
COMPLEXES
DISPERSIONS
EMULSIONS
HYDROCARBONS
ORGANIC COMPOUNDS
TRANSITION ELEMENT COMPLEXES
400102* - Chemical & Spectral Procedures