Structural transformations of polysaccharides exposed to CO2-laser radiationReport as inadecuate

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Journal of Applied Spectroscopy

, Volume 73, Issue 2, pp 178–184

Received: 24 October 2005


We have used IR spectroscopy to study conformational transformations of polysaccharide macromolecules dextran, pullulan, amylose, and microcrystalline cellulose and changes in their structural ordering when exposed to cw emission of a CO2 laser. We have established that the structures of conformationally labile polysaccharides are the most sensitive to laser radiation. The effect of laser treatment is greatest for lower molecular weight polymers. We have observed for the first time changes in the conformational states of dextran macromolecules in the direction of an increase in the structural ordering when exposed to emission from a CO2 laser. This quite different from purely thermal treatment, where disordering of the polysaccharides structure occurs.

Key wordspolysaccharides IR spectrum emission from a CO2 laser structure ordering conformational transformations lability 

Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 2, pp. 164–169, March–April, 2006.

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Author: V. A. Dlugunovich - R. G. Zhbankov - V. A. Zhdanovskii - S. A. Zagorskaya - S. P. Firsov


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