壳聚糖 L-和 D-抗坏血酸盐的成盐能量和超分子有序化

IF 1 4区 化学 Q4 POLYMER SCIENCE
O. N. Malinkina, A. B. Shipovskaya
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引用次数: 0

摘要

摘要 以粘均分子量分别为40×103和200×103的两种壳聚糖(D-葡聚糖)为例,研究了抗坏血酸非对映异构体(L-和D-)对异(D-L)和同(D-D)手性聚合物-酸盐复合物的形成能、结构和超分子排序的影响。研究发现,壳聚糖与 L-抗坏血酸在水介质中相互作用时的热效应以及 (D-L) 盐的质子化程度均低于该酸的 D-异构体。与异手性(D-L)盐相比,同手性(D-D)盐的结晶水含量低,结晶度高,超分子结构更致密,分子间和分子内接触程度高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Energy of Salt Formation and Supramolecular Ordering of Chitosan L- and D-Ascorbates

Energy of Salt Formation and Supramolecular Ordering of Chitosan L- and D-Ascorbates

Energy of Salt Formation and Supramolecular Ordering of Chitosan L- and D-Ascorbates

Using two samples of chitosan (D-glucan) with viscosity-average molecular mass 40 × 103 and 200 × 103 as the example, the influence of diastereomer form (L- and D-) of ascorbic acid on the energetics of formation, structure, and supramolecular ordering of hetero- (D‒L) and homochiral (D‒D) polymer–acid salt complexes has been studied. It has been found that heat effect during the interaction of chitosan with L-ascorbic acid in aqueous medium and degree of protonation of the (D‒L)-salts are lower in comparison with D-isomer of the acid. The homochiral (D‒D)-salts, in contrast to the heterochiral (D‒L)-salts, have exhibited lower amount of crystallization water, high degree of crystallinity, and denser supramolecular structure with high level of inter- and intramolecular contacts.

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来源期刊
Polymer Science, Series A
Polymer Science, Series A 化学-高分子科学
CiteScore
1.70
自引率
0.00%
发文量
55
审稿时长
3 months
期刊介绍: Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.
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