NDLI: Laser photoemission generation and electrochemical study of methyl radicals as secondary products of OH radicals capture by dimethyl sulfoxide molecules

Content Provider	Springer Nature Link
Author	Kurmaz, Vladimir A. Kotkin, Alexander S. Simbirtseva, Galina V.
Copyright Year	2011
Abstract	Electrode reactions of intermediates formed during capture of OH radicals by dimethylsulfoxide molecules were studied by laser photoemission in aqueous buffer solutions and pH range from acidic to basic. The results were compared with those obtained previously for electrochemical behaviour of methyl radicals generated via photoemission from CH3Cl. The essential similarity was found for parameters of irreversible one-electron transfer from/to these intermediates, i.e. the potentials E 1/2 on time-resolved voltammograms and rate constants at E = E 1/2. Hence, both active particles were concluded to be equivalent and corresponded to methyl radical. The primary product of OH radicals capture by DMSO molecules, i.e. adduct (CH3)2SO·(OH), was spontaneously decomposed to form ·CH3 with time as low as <2 × 10−5 s. A simultaneous increase of the reduction wave height was observed at pH transition from low basic to low acidic and at illumination times T m of an electrode with UV light if T m ≥ 90–300 ms. The increase exceeded considerably the one-electron reduction level. These features were presumably caused by the rather slow formation of organomercury intermediates as interaction products of the components of the system with a mercury electrode.
Starting Page	2119
Ending Page	2126
Page Count	8
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	15
Issue Number	10
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-10-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Laser photoemission DMSO Methyl radical Organomercury intermediates Characterization and Evaluation of Materials Energy Storage Electrochemistry Analytical Chemistry Physical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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