Journal
BIOMACROMOLECULES
Volume 13, Issue 2, Pages 565-569Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm201757d
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Funding
- Japan Society for the Promotion of Science [23248026]
- Grants-in-Aid for Scientific Research [23248026] Funding Source: KAKEN
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A dynamic control of the cholesteric coloration and optical clarity of aqueous (hydroxypropyl)cellulose (HPC) lyotropics 4 attainable under a weak electric field by employing a fluctuating ionic additive as P and T-c shifter (P, cholesteric pitch; T-c, cloud point). The present Article demonstrates some examples of time evolving gradation in reflection color and transparency for HPC liquid crystals containing various N-alkyl-substituted methylimidazolium salts ([CnMim][X]); this was perceivable when each anisotropic solution was sealed in a layer form between parallel slide glasses spaced by a pair of carbon electrodes and then electrified with a direct circuit The electrooptical phenomenon was interpreted as being primarily due to generation of a disproportional dislocation of cation (CnMim(+))/anion (X-) constituents. Even after the electric supply was ceased, an appreciable potential difference remained in the color-gradated samples. It is suggested that the salt-containing liquid-crystalline system behaves like a quasi capacitor as a viscous electrolytic medium of high resistance.
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