학술논문
ClO 2 -Mediated Oxidation of the TEMPO Radical: Fundamental Considerations of the Catalytic System for the Oxidation of Cellulose Fibers.
Document Type
Article
Source
Subject
*CATALYTIC oxidation
*RADICALS (Chemistry)
*ELECTRON paramagnetic resonance spectroscopy
*ULTRAVIOLET-visible spectroscopy
*OXIDATION
*ADENOSYLMETHIONINE
*ALCOHOL oxidation
*CELLULOSE fibers
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Language
ISSN
1420-3049
Abstract
The reaction mechanism of ClO 2 -mediated TEMPO oxidation was investigated by EPR spectroscopy and UV–Vis spectroscopy in the context of an alternative TEMPO sequence for cellulose fiber oxidation. Without the presence of a cellulosic substrate, a reversibility between TEMPO and its oxidation product, TEMPO + , was displayed, with an effect of the pH and reagent molar ratios. The involvement of HOCl and Cl − , formed as byproducts in the oxidation mechanism, was also evidenced. Trapping HOCl partly inhibits the reaction, whereas adding methylglucoside, a cellulose model compound, inhibits the reversibility of the reaction to TEMPO. [ABSTRACT FROM AUTHOR]