Bouffier L., Lister K. E., Higgins S. J., Nichols R. J., Doneux T.,
J. Electroanal. Chem. 2012, 664, 80-87.

The electrochemistry of proton coupled electron transfer phenomena is an important contemporary topic in molecular and interfacial electrochemistry, due to its significance in important organic and bioelectrochemical processes. We report here on the synthesis, self-assembly and electrochemical characterisation of amino-naphthoquinones derivatives on gold electrodes, which provide strong test-beds for such electrochemical processes. Voltammetric analysis of these systems and comparisons between buffered and unbuffered solutions give insights in the electrochemistry of the proton coupled electron transfer phenomenon. The solution electrochemistry of three of these derivatives is analysed with respect to the different side groups on the amino moiety, while the fourth derivative can be self-assembled on the gold electrode through a thiol attachment. The latter enables a Laviron analysis and quantification of the apparent electron transfer rate constant ks ≈ 2 × 102 s−1, this value being barely affected by the buffering conditions. However, switching from buffered to non-buffered solution markedly changed the voltammetric features of the redox active monolayer. While only one cathodic peak and one anodic peak were recorded in phosphate buffer solutions, one or two anodic peaks were observed in KClO4 depending on the scan rate, in very good agreement with recent theoretical works.

 

JElectroanalChem2012 p80 TOC

La Chimie au Service d’une Délivrance de l’Insuline en Boucle Fermée
Wednesday, 19 December 2012
Messager L., Ancla C., Lapeyre V., Ravaine V., Catargi B.Médecine Clinique Endocrinologie et Diabète 2012, 59, 38-45.  
Indirect Bipolar Electrodeposition
Tuesday, 27 November 2012
Loget G., Roche J., Gianessi E., Bouffier L., Kuhn A.,J. Am. Chem.Soc. 2012, 134, 20033-20036. Based on the principles of bipolar electrochemistry, localized pH gradients are generated at the surface...
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Light-Emitting Electrochemical Swimmers
Monday, 08 October 2012
Sentic M., Loget G., Manojlovic D., Kuhn A., Sojic N.,Angew. Chem. Int. Ed. 2012, 51, 11284–11288. Swimmer in the dark: Propulsion of a conducting object is intrinsically coupled with light...
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Controlled Orientation of Asymmetric Copper Deposits on Carbon Microobjects by Bipolar Electrochemistry
Wednesday, 19 September 2012
Fattah Z., Garrigue P., Lapeyre V., Kuhn A., Bouffier L.,J. Phys. Chem. C 2012, 116, 22021-22027. Asymmetric particles of various chemical compositions have attracted great attention because of their...
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Quantification of Photoelectrogenerated Hydroxyl Radical on TiO2 by Surface Interrogation Scanning Electrochemical Microscopy
Tuesday, 07 August 2012
Zigah D., Rodriguez-Lopez P., Bard A. J.,Phys. Chem. Chem. Phys. 2012, 14, 12764-12772. Asymmetric particles of various chemical compositions have attracted great attention because of their...
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Development of Functionalized Cyclotriveratrylene Analogues: Introduction of Withdrawing and p-Conjugated Groups
Monday, 30 July 2012
Peyrard L., Dumartin M.-L., Chierici S., Pinet S., Jonusauskas G., Meyrand P., Gosse I.,J. Org. Chem. 2012, 77, 7023-7027. Cyclotriveratrylene analogues (CTVs) are supramolecular bowl-shaped...
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Electrochemistry and Bioactivity Relationship of 6-Substituted-4H-Pyrido[4,3,2-kl]acridin-4-one Antitumor Drug Candidates
Friday, 27 July 2012
Bouffier L., Gosse I., Demeunynck M., Mailley P.,Bioelectrochemistry 2012, 88, 103-109. We report here the electrochemical characterization of eight synthetic DNA intercalators based on the...
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True Bulk Synthesis of Janus Objects by Bipolar Electrochemistry
Monday, 16 July 2012
Loget G., Roche J., Kuhn A.,Adv. Mater. 2012, 24, 5111-5116. Cover article Janus particles have different features/chemistry on two opposite sides (see figure). So far, they have been obtained mainly...
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Direct Visualization of Symmetry Breaking during Janus Nanoparticle Formation
Tuesday, 03 July 2012
Loget G., Lee T.-C., Taylor R. W., Mahajan S., Nicoletti O., Jones S. T., Coulston R. J., Lapeyre V., Garrigue P., Midgley P. A., Scherman O. A., Baumberg J. J., Kuhn A.,Small 2012, 8, 2698-2703. The...
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Combined Macro/mesoporous Microelectrode Arrays (MEAs) for Low Noise Extracellular Recording of Neural Networks
Wednesday, 27 June 2012
Heim M., Rousseau L., Reculusa S., Urbanova V., Mazzocco C., Joucla S., Bouffier L., Vytras K., Bartlett P., Kuhn A., Yvert B.Journal of Neurophysiology 2012, 15, 1793-1803. Microelectrode arrays...
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Bulk Synthesis of Janus Objects and Asymmetric Patchy Particles
Thursday, 10 May 2012
Loget G., Kuhn A.,J. Mater. Chem. 2012, 22, 15457-15474. Feature article This review article highlights the most recent advances with respect to the preparation of Janus objects by bulk phase...
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Bipolar Electrochemistry for Cargo-lifting in Fluid Channels
Wednesday, 15 February 2012
Loget G., Kuhn A.,Lab on a Chip 2012, 12, 1967-1971. Hot Paper, Cover Article We report for the first time the vertical propulsion of conducting beads in liquid filled capillaries by bipolar...
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Origin and Control of Adhesion between Emulsion Drops Stabilised by Thermally-sensitive Soft Colloidal Particles
Friday, 20 January 2012
Destribats M., Lapeyre V., Sellier E., Leal Calderon F., Ravaine V., Schmitt V.,Langmuir 2012, 28, 3744-3755. We used soft microgels made of poly(N-isopropylacrylamide) (pNIPAM) of variable...
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Site Selective Generation of Sol-gel Deposits in Layered Bi-metallic Macroporous Electrode Architectures
Thursday, 19 January 2012
Lalo H., Bon Saint-Côme Y., Plano B., Etienne M., Walcarius E., Kuhn A.,Langmuir 2012, 28, 2323-2326. The elaboration of an original composite bimetallic macroporous electrode containing a...
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The Fraction of Alpha-linolenic Acid present in the sn-2 position of Structured Triacylglycerols decreases in Lymph Chylomicrons and Plasma Triacylglycerols during the Course of Lipid Absorption in Rats
Wednesday, 30 November 2011
Couedelo L., Vaysse C., Vaique E., Guy A., Gosse I., Durand T., Pinet S., Cansell M., Combe N.Journal of Nutrition 2012, 142, 70-75. Little is known about the ability of α-linolenic acid (Ln) to...
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Engineering of Complex Macroporous Materials through Controlled Electrodeposition in Colloidal Superstructures
Tuesday, 29 November 2011
Heim M., Reculusa S., Ravaine S., Kuhn A.,Adv. Funct. Mater. 2012, 22, 538-545. Inside Cover Article Macroporous materials with a sophisticated architecture are obtained by electrochemical deposition...
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Electrochemical Investigations of Dissolved and Surface Immobilised 2-Amino-1,4-Naphthoquinones in Aqueous Solutions
Saturday, 29 October 2011
Bouffier L., Lister K. E., Higgins S. J., Nichols R. J., Doneux T.,J. Electroanal. Chem. 2012, 664, 80-87. The electrochemistry of proton coupled electron transfer phenomena is an important...
Nanostructuration Strategies to Enhance Microelectrode Array (MEA) Performance for Neuronal Recording and Stimulation
Tuesday, 18 October 2011
Heim M., Yvert B., Kuhn A.,J. Physiology - Paris 2012, 106, 137-145. Microelectrode arrays (MEAs) are widely used tools for recording and stimulating extracellular neuronal activity. Major...
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