Optical activity of the cellulose acetate-mesophase-generating solvent system in the formation of a lyotropic liquid-crystalline phase |
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| Authors: | A B Shipovskaya O F Kazmicheva G N Timofeeva |
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| Institution: | (1) Chernyshevsky Saratov State University, Asrakhanskaya ul. 83, Saratov, 410026, Russia;(2) Institute of Chemistry, Chernyshevsky Saratov State University, Asrakhanskaya ul. 83, Saratov, 410026, Russia |
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| Abstract: | It was demonstrated experimentally that the vapors of a mesophase-generating solvent, i.e., a solvent forming a lyotropic liquid-crystalline phase with a polymer, changed the spatial structure and optical density of natural polysaccharides (cellulose acetates). In this process, the value of specific optical rotation of the polymer modified by the vapors varied in a wide range up to sign inversion. The action of vapors on the polymer follows a peculiar dose-effect pattern, with lower doses producing a stronger effect. Application of this approach to the study into specific structural characteristics of biopolymers, such as DNA, is proposed. |
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| Keywords: | natural polysaccharide cellulose acetates optical activity lyotropic liquid-crystalline phase nitromethane DNA |
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