β-Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL™ Graphite Electrodes

Susan Warren; Brian Seddon; Ruth Pilkington; Alison Crossely; Philip Holdway; Eithne Dempsey

doi:10.1002/elan.201900184

β-Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL^™ Graphite Electrodes

Susan Warren, Brian Seddon, Ruth Pilkington, Alison Crossely, Philip Holdway, Eithne Dempsey

Technological University Dublin

Research output: Contribution to journal › Article › peer-review

Abstract

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 electro-active sites.

Original language	English
Pages (from-to)	1034-1042
Number of pages	9
Journal	Electroanalysis
Volume	32
Issue number	5
DOIs	https://doi.org/10.1002/elan.201900184
Publication status	Published - 1 May 2020

Keywords

graphite pencil electrode
selective polymer layer
β-methyl-umbelliferone

Access to Document

10.1002/elan.201900184

https://arrow.tudublin.ie/cenresart/76Licence: CC BY-NC-SA

Cite this

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title = "β-Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL{\texttrademark} Graphite Electrodes",

abstract = "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 {\AA}3–136 {\AA}3) 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 electro-active sites.",

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T1 - β-Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL™ Graphite Electrodes

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AU - Seddon, Brian

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AU - Crossely, Alison

AU - Holdway, Philip

AU - Dempsey, Eithne

PY - 2020/5/1

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AB - 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 electro-active sites.

KW - graphite pencil electrode

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