Solvent Dependent Conformation of a Regioselective Amylose Carbamate. Amylose-2-acetyl-3,6-bis(phenylcarbamate)

Tsuda, Maiko; Terao, Ken; Kitamura, Shinichi; Sato, Takahiro

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タイトル	Solvent Dependent Conformation of a Regioselective Amylose Carbamate. Amylose-2-acetyl-3,6-bis(phenylcarbamate)
著者	Tsuda, Maiko Tsuda, Maiko
	Terao, Ken Terao, Ken
	Kitamura, Shinichi Kitamura, Shinichi
	Sato, Takahiro Sato, Takahiro
キーワード等	polysaccharide derivative
	hydrogen bond
	chain stiffness
内容	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.
抄録	Six amylose-2-acetyl-3,6-bis(phenylcarbamate) (AAPC) samples ranging in weight-average molar mass Mw from 1.8 × 10^4 g mol−1 to 1.1 × 10^6 g mol^<−1> have been prepared from enzymatically synthesized amylose samples. Static light scattering, small-angle X-ray scattering, sedimentation equilibrium, and viscosity measurements were made for the samples in 1,4-dioxane (DIOX), 2-ethoxyethanol (2EE), and 2-butanone (MEK) all at 25°C to determine particle scattering functions, z-average radii of gyration, intrinsic viscosities, as well as M_w. The data were analyzed in terms of the wormlike cylinder model mainly to yield the helix pitch per residue h and the Kuhn segment length λ^<−1>, which corresponds to twice of the persistence length. The latter parameters (λ^<−1>) in 2EE (11 nm) and MEK (12 nm) are quite smaller than those for amylose tris(phenylcarbamate) (ATPC) in the same solvent (16 nm in 2EE and 18 nm in MEK) whereas those for AAPC (21 nm) and ATPC (22 nm) in DIOX are essentially the same as each other. This indicates that the chain stiffness of AAPC is more strongly influenced by the solvents since the number of intramolecular H-bonds of AAPC is more changeable than that for ATPC.
公開者	Wiley
掲載誌名	Biopolymers
巻	97
号	12
開始ページ	1010
終了ページ	1017
刊行年月	2012-09
ISSN	10970282
NCID	AA11616617
URL	http://hdl.handle.net/11094/53324
言語	英語
カテゴリ	学術雑誌論文 Journal Article

著者版フラグ	author
NII資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Biopolymers.97(12) P.1010-P.1017
DC.title	Solvent Dependent Conformation of a Regioselective Amylose Carbamate. Amylose-2-acetyl-3,6-bis(phenylcarbamate)
DC.creator	Tsuda, Maiko
	Terao, Ken
	Kitamura, Shinichi
	Sato, Takahiro
DC.publisher	Wiley
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2012-09
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/53324
DC.subject	polysaccharide derivative
	hydrogen bond
	chain stiffness
DC.description	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.
DCTERMS.abstract	Six amylose-2-acetyl-3,6-bis(phenylcarbamate) (AAPC) samples ranging in weight-average molar mass Mw from 1.8 × 10^4 g mol−1 to 1.1 × 10^6 g mol^<−1> have been prepared from enzymatically synthesized amylose samples. Static light scattering, small-angle X-ray scattering, sedimentation equilibrium, and viscosity measurements were made for the samples in 1,4-dioxane (DIOX), 2-ethoxyethanol (2EE), and 2-butanone (MEK) all at 25°C to determine particle scattering functions, z-average radii of gyration, intrinsic viscosities, as well as M_w. The data were analyzed in terms of the wormlike cylinder model mainly to yield the helix pitch per residue h and the Kuhn segment length λ^<−1>, which corresponds to twice of the persistence length. The latter parameters (λ^<−1>) in 2EE (11 nm) and MEK (12 nm) are quite smaller than those for amylose tris(phenylcarbamate) (ATPC) in the same solvent (16 nm in 2EE and 18 nm in MEK) whereas those for AAPC (21 nm) and ATPC (22 nm) in DIOX are essentially the same as each other. This indicates that the chain stiffness of AAPC is more strongly influenced by the solvents since the number of intramolecular H-bonds of AAPC is more changeable than that for ATPC.
citation_title	Solvent Dependent Conformation of a Regioselective Amylose Carbamate. Amylose-2-acetyl-3,6-bis(phenylcarbamate)
citation_author	Tsuda, Maiko
	Terao, Ken
	Kitamura, Shinichi
	Sato, Takahiro
citation_publisher	Wiley
citation_language	英語
citation_date	2012-09
citation_journal_title	Biopolymers
citation_volume	97
citation_issue	12
citation_firstpage	1010
citation_lastpage	1017
citation_issn	10970282
citation_public_url	http://hdl.handle.net/11094/53324
citation_keywords	polysaccharide derivative
	hydrogen bond
	chain stiffness

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