Year 2005, Month 5 (Section Full Articles, Page 1155)
Solid-phase mechanochemical incorporation of a spin label into cellulose
A. V. Dushkin, I. B. Troitskaya, V. V. Boldyrev, and I. A. Grigor´ev
Samples of cellulose labeled with stable nitroxyl radicals were prepared by mechanochemi-
cal synthesis. The samples were studied by IR and EPR spectroscopies, X-ray phase analysis,
and electron microscopy. The EPR spectral patterns indicate a uniform distribution of "grafted"
paramagnetic centers over the cellulose macromolecular chains. X-Ray diffraction patterns
obtained and the results of crystallinity index calculations for the samples showed that strong
bonding of spin labels causes changes in the cellulose structure up to nearly complete
amorphization of the material.
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