Local conformation and intermolecular interaction of rigid ring polymers are not always the same as the linear analogue: Cyclic amylose tris(phenylcarbamate) in θ solvents

Asano N., Kitamura S., Terao K.. Local conformation and intermolecular interaction of rigid ring polymers are not always the same as the linear analogue: Cyclic amylose tris(phenylcarbamate) in θ solvents. Journal of Physical Chemistry B, 117(32), 9576-9583, July 23, 2013. Copyright © 2013, American Chemical Society. https://doi.org/10.1021/jp406607w

Solvent-dependent conformation of a regioselective amylose carbamate: Amylose-2-acetyl-3,6-bis(phenylcarbamate)

This is the peer reviewed version of the following article: Maiko Tsuda, Ken Terao, Shinichi Kitamura, Takahiro Sato, “Solvent-dependent conformation of a regioselective amylose carbamate: Amylose-2-acetyl-3,6-bis(phenylcarbamate)”, Biopolymers, Volume 97, Issue 12, pages 1010–1017, December 2012, which has been published in final form at DOI: 10.1002/bip.22118. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving

Chain Dimensions and Stiffness of Cellulosic and Amylosic Chains in an Ionic Liquid: Cellulose, Amylose, and an Amylose Carbamate in BmimCl

Jiang X., Kitamura S., Sato T., et al. Chain Dimensions and Stiffness of Cellulosic and Amylosic Chains in an Ionic Liquid: Cellulose, Amylose, and an Amylose Carbamate in BmimCl. Macromolecules, 50(10), 3979-3984, May 8, 2017. Copyright © 2017, American Chemical Society. https://doi.org/10.1021/acs.macromol.7b00389

Rigid cyclic polymer in solution: Cycloamylose tris(phenylcarbamate) in 1,4-dioxane and 2-ethoxyethanol

Terao K., Asano N., Kitamura S., et al. Rigid cyclic polymer in solution: Cycloamylose tris(phenylcarbamate) in 1,4-dioxane and 2-ethoxyethanol. ACS Macro Letters, 1(11), 1291-1294, October 18, 2012. Copyright © 2012, American Chemical Society. https://doi.org/10.1021/mz3004506

A Temperature Responsive Polysaccharide Derivative in Aqueous Solution : Amylose Ethyl Carbamates

Shunji Kimura, Ryotaro Kochi, Shinichi Kitamura, and Ken Terao. A Temperature Responsive Polysaccharide Derivative in Aqueous Solution: Amylose Ethyl Carbamates. ACS Applied Polymer Materials, 2(6), 2426-2433, 2020. Copyright © 2020, American Chemical Society. https://doi.org/10.1021/acsapm.0c00366

Self-Assembly of Amphiphilic Amylose Derivatives in Aqueous Media

Six amylose derivative (C12CMA) samples with hydrophobic dodecyl ether groups and hydrophilic sodium carboxymethyl groups were synthesized from an enzymatically synthesized amylose for which the weight-average molar mass is 50 kg mol-1 to realize amylose-based amphiphilic polymer micelles. The degree of substitution of hydrophobic (DSC12) and hydrophilic (DSCM) groups ranges between 0.076 and 0.39 and between 0.35 and 1.83, respectively. Static and dynamic light scattering, small-angle X-ray scattering (SAXS), and fluorescence measurements with pyrene as a probe were carried out for the samples in 150 mM aqueous NaCl to characterize the higher-order structure in solution. The fluorescence from pyrene showed that all six samples have hydrophobic environment, while the hydrophobicity tends to increase with rising DSC12. All six samples have high scattering intensity owing to the relatively large concentrated droplets ranging in the hydrodynamic radius from 50 to 110 nm, whereas the weight fraction of such large particles is substantially small except for the highest DSC12 sample. Most polymer chains for relatively low DSC12 of 0.076 were molecularly dispersed with a very small amount of large droplets. The dispersed chain has a slightly smaller helix pitch per residue and a more rigid main chain than those for amylose in dimethyl sulfoxide, suggesting that the amylosic main chain of C12CMA has a helical structure with dodecyl groups at least locally. On the other hand, an anisotropic shaped micelle-like structure is only found for relatively high DSC12 (0.23 and 0.39) samples, which was detected by the SAXS profile at a high scattering vector range. The micelle structure for high DSC12 samples is consistent with the high chain stiffness.Kameyama Y., Kitamura S., Sato T., et al. Self-Assembly of Amphiphilic Amylose Derivatives in Aqueous Media. Langmuir : the ACS journal of surfaces and colloids, 35(20), 6719-6726, April 30, 2019, Copyright © 2019, American Chemical Society https://doi.org/10.1021/acs.langmuir.9b00985

Does local chain conformation affect the chiral recognition ability of an amylose derivative? Comparison between linear and cyclic amylose tris(3,5-dimethylphenylcarbamate)

The full-text file will be made open to the public on 16 August 2021 in accordance with the publisher's policy.Akiyuki Ryoki, Yuto Kimura, Shinichi Kitamura, Katsuhiro Maeda, Ken Terao. Does local chain conformation affect the chiral recognition ability of an amylose derivative? Comparison between linear and cyclic amylose tris(3,5-dimethylphenylcarbamate). Journal of Chromatography A, 1599, 2019, pp. 144-151. https://doi.org/10.1016/j.chroma.2019.04.019