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Issue 9, 2004
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Aminoxyl radicals as crosslinks for macromolecules of polyvinylpyrrolidone

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Abstract

Using polyvinylpyrrolidone as an example, it has been shown that photolysis of ceric ammonium nitrate at room temperature can result in crosslinking of macromolecules. This process correlates with the formation of stable aminoxyl radicals, which are registered by EPR. The mechanism involves photodissociation of nitrate radicals produced in the primary reaction into nitric oxide or nitrogen dioxide depending on the wavelength of the light, and simultaneous formation of macroradicals. The accumulation of aminoxyl radicals occurs owing to the acceptance of macroradicals by nitroso or nitro groups according to which mechanism of the nitrate radical photodissociation prevails. Similar radical reactions are observed in N-methyl-2-pyrrolidone.

Graphical abstract: Aminoxyl radicals as crosslinks for macromolecules of polyvinylpyrrolidone

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Publication details

The article was received on 21 Jan 2004, accepted on 03 Mar 2004 and first published on 31 Mar 2004


Article type: Paper
DOI: 10.1039/B400949E
Org. Biomol. Chem., 2004,2, 1359-1363

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    Aminoxyl radicals as crosslinks for macromolecules of polyvinylpyrrolidone

    E. Ya. Davydov, E. N. Afanas'eva, I. S. Gaponova and G. B. Pariiskii, Org. Biomol. Chem., 2004, 2, 1359
    DOI: 10.1039/B400949E

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