Electrochemistry of the organic molecule methylene blue
Citation:
John Colleran, 'Electrochemistry of the organic molecule methylene blue', [thesis], Trinity College (Dublin, Ireland). School of Chemistry, 2008, pp 287Download Item:
Abstract:
The first Chapter deals with the general information about chemically modified
electrodes, what they are, the development of fabrication techniques, and relevant
applications of modified electrodes. This is followed by some background on the redox
polymer, polymethylene blue, and closes with a description of magnetoelectrochemistry.
in Chapter 2 the experimental procedures and theory used in this body of research are
dealt with in good detail. The first part of Chapter 3 describes the solution phase
electrochemistry of the organic phenothiazine dye, methylene blue, at a glassy carbon
electrode. The effect that dimerisation has on the diffusion coefficients and electron
transfer kinetics, is explored. Adsorption was observed at the glassy carbon electrode and
an adsorption isotherm constructed. The maximum surface coverage for a MB monolayer
was extracted from the isotherm data. The solid phase electrochemistry of MB was also
investigated via electropolymerisation of the monomer onto the glassy carbon electrode.
The charge carried by the polymer films was examined as a function of initial
concentration of the monomeric solution and of the number of cyclic voltammetric
polymer growth cycles applied. A value for the diffusional charge transfer coefficient
was estimated using cyclic voltammetry. EQCM was employed to quantify the movement
of counterions through the film and a stoichiometric expression for this redox process
was proposed.
Author: Colleran, John
Advisor:
Lyons, MikeQualification name:
Doctor of Philosophy (Ph.D.)Publisher:
Trinity College (Dublin, Ireland). School of ChemistryNote:
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Full text availableKeywords:
Chemistry, Ph.D., Ph.D. Trinity College DublinMetadata
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