β‐Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL™ Graphite Electrodes,Electroanalysis

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β‐Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL™ Graphite Electrodes
Electroanalysis ( IF 2.7 ) Pub Date : 2020-01-09 , DOI: 10.1002/elan.201900184
Susan Warren _{1,

2} , Brian Seddon ₃ , Ruth Pilkington ₄ , Alison Crossely ₅ , Philip Holdway ₅ , Eithne Dempsey ₆

Affiliation

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.

中文翻译：

PENTEL™石墨电极上的β-甲基伞形酮表面改性和渗透性研究

用β-甲基伞形酮进行电氧化后，对商用石墨复合材料进行了电化学和显微成像分析。观察到石墨电极的电荷转移表面改性，推测是由于吸附的界面伞形酮部分引起的。新的表面的朝向的范围内的类似，但大小可变的分子的渗透性（23埃³ -136埃³）分子的氧化还原探针进行了讨论。共聚焦显微镜中的红移荧光为存在表面结合的伞形酮层提供了进一步的支持。SEM铂谱分析技术用作成像工具来绘制伞形酮表面和电活性位点的大小分布图。

更新日期：2020-01-09

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