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Doklady Chemistry, Vol. 387, Nos. 4–6, 2002, pp. 335–338. Translated from Doklady Akademii Nauk, Vol. 387, No. 5, 2002, pp. 643–646. Original Russian Text Copyright © 2002 by Pristupa, Sharpatyi. CHEMISTRY Mechanisms of Elementary Acts of Photochemical Destruction of Cellulose Nanolayer at Room Temperature A. I. Pristupa* and V. A. Sharpatyi** Presented by Academician L.A. Piruzyan June 26, 2002 Received June 26, 2002 Studying the room-temperature photocatalytic and To measure the time frame for appearance of radi- mechanoactivated destruction of cellulose, a natural cals involved in polymer destruction (types of radicals stereoregular polymer, by nanolayer spectroscopy of and their magnetic resonance parameters are reported reaction-yield-detected magnetic resonance (RYDMR) in [2, 3]), time-resolved RYDMR spectra were [1] resulted in detection of a complete set of free radi- recorded; this technique allowed us to separately cals inherent in polysaccharides [2, 3]. On the basis of observe spectral components that arise from different the results therein, the conclusion about the existence of radicals generated on the polymer surface at room tem- the free-radical channel of their destruction has been perature in the time range from a few nanoseconds. The drawn and possible schemes of radical participation in time parameters are listed in
Doklady Chemistry – Springer Journals
Published: Oct 10, 2004
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