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1.3 PHYSICAL SCIENCES, 1.4 CHEMICAL SCIENCES, Electrochemistry, Analytical chemistry
Electrochemical and micro-imaging analysis of a commercial graphite-composite material is presented following electro-oxidation with β-methylumbelliferone. Charge-transfer surface modification was observed for the graphite electrode, presumed to have arisen from adsorbed interfacial umbelliferone moieties. The molecular permeability of the new surface towards a range of similar, yet size-variable (23 Å3–136 Å3) molecular redox probes is discussed. Red-shift fluorescence in confocal microscopy offers further support for the presence of a surface-bound umbelliferone layer. An SEM-platinum profiling technique was used as an imaging tool to map the umbelliferone surface and size-distribution of electroactive sites.
S. Warren, B. Seddon, R. Pilkington, A. Crossely, P. Holdway, E. Dempsey, Electroanalysis 2020, 32, 1034
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