Biphasic redox chemistry of α-tocopherol: Evidence for electrochemically induced hydrolysisand dimerization on the surface of and within femtolitre droplets immobilized onto graphite electrodes

Literature Information

Publication Date 2004-01-23
DOI 10.1039/B315052F
Impact Factor 3.676
Authors

Andrew J. Wain, Jay D. Wadhawan, Robert. R. France, Richard G. Compton


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Abstract

The voltammetric behaviour of α-tocopherol, when immobilized as microdroplets on a basal plane pyrolytic graphite electrode and immersed in aqueous electrolyte is reported. Under these biphasic conditions, the electrochemical oxidation is successfully shown to involve two competing pathways initially involving either one or two electrons, the products of which undergo chemical reactions to form electroactive species. One pathway generates a quinone via ring opening hydrolysis at the electrode |α-TOH| aqueous electrolyte three-phase boundary of the femtolitre volume droplets which undergoes reduction on the reverse sweep. The other produces a dimer, via the coupling of α-tocopherol derived radicals, which can be oxidized further to produce cyclized spiro-dimer. Both pathways involve proton expulsion from the redox liquid phase.

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Front cover

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DOI: 10.1039/CS97302FX001

Contents

Front/Back Matter

DOI: 10.1039/B7RP90011B

Review

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DOI: 10.1039/AN883080109B

Front cover

Cover

DOI: 10.1039/B7RP90014G

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Other

DOI: 10.1039/CS97706FP005

Contents pages

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DOI: 10.1039/CS97706FP009

Back matter

Other

DOI: 10.1039/CS99726BP013

Contents pages

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DOI: 10.1039/CS99524FP003

Contents pages

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DOI: 10.1039/CS97302FP007

Contents pages

Other

DOI: 10.1039/CS99726FP003

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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