Polymorphic Modifications of Chitosan
- Authors: Baklagina Y.G.1, Klechkovskaya V.V.2, Kononova S.V.1, Petrova V.A.1, Poshina D.N.1, Orekhov A.S.2,3, Skorik Y.A.1,4
- 
							Affiliations: 
							- Institute of Macromolecular Compounds
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”
- National Research Centre “Kurchatov Institute,”
- Almazov National Medical Research Centre
 
- Issue: Vol 63, No 3 (2018)
- Pages: 303-313
- Section: Reviews
- URL: https://journals.rcsi.science/1063-7745/article/view/192404
- DOI: https://doi.org/10.1134/S1063774518030033
- ID: 192404
Cite item
Abstract
This work describes the analysis of the crystal structures of chitosan, its main polymorphic modifications, and its characteristic mutual chain packing and hydrogen bond systems in the crystalline regions of conformers. The analysis takes into consideration the crystal structures of chitosan complexes (salts) with organic and inorganic acids and their structural transformations. Notably, the transformation of the hydrated form of chitosan into anhydrous is found to be irreversible and occurs either at high temperatures or through a less stable form of hydrated salts. The interaction with polyanions during the formation of multilayer films can be considered as a way to form the anhydrous crystalline form of chitosan.
About the authors
Y. G. Baklagina
Institute of Macromolecular Compounds
														Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							St. Petersburg, 199004						
V. V. Klechkovskaya
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”
							Author for correspondence.
							Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							Moscow, 119333						
S. V. Kononova
Institute of Macromolecular Compounds
														Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							St. Petersburg, 199004						
V. A. Petrova
Institute of Macromolecular Compounds
														Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							St. Petersburg, 199004						
D. N. Poshina
Institute of Macromolecular Compounds
														Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							St. Petersburg, 199004						
A. S. Orekhov
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”; National Research Centre “Kurchatov Institute,”
														Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							Moscow, 119333; Moscow, 123182						
Y. A. Skorik
Institute of Macromolecular Compounds; Almazov National Medical Research Centre
														Email: klechvv@crys.ras.ru
				                					                																			                												                	Russian Federation, 							St. Petersburg, 199004; St. Petersburg, 197341						
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