Korea-Japan Joint Symposium: Emerging Biopolymers for Advanced Applications (English)
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Different Chain Dimensions and Chiral Separation Abilities of Cyclic Amylose Carbamates from the Corresponding Linear Polymers
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Amylose carbamates, such as amylose tris(3,5-dimetylphenylcarbamate) (ADMPC), are widely used as stationary phases of chiral separation columns for high performance liquid chromatography. We recently found that cyclic amylose tris(phenylcarbamate) behaves as semiflexible ring polymers in solution and its local conformation is different from that of the corresponding linear polymer. The difference in the local conformation between the linear and cyclic polymers may influence the chiral separation ability. Thus, in this study, we precisely determined the local conformation of some cyclic amylose carbamates, including cyclic ADMPC, by using small-angle X-ray scattering measurements combined with Monte Carlo simulation for the scattering function of the wormlike ring model. Furthermore, we investigated the difference in the chiral separation abilities between the linear and cyclic polymers to clarify the effect of the local conformation on the chiral separation abilities.