Synthesis and nondestructive detailed structure characterization of carboxymethyl xylan from bagasse

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-01-01 DOI:10.1080/07328303.2020.1748643

Lei Wang , Xiangxiang Qin , Xueyan Miao , Haishan Chen , Yuheng Zhou , Aihua Cai

引用次数: 4

Abstract

Carboxymethyl xylan (CMX) was synthesized and characterized. A method based on quantitative ¹³C NMR was developed to obtain detailed structural information. The total degree of substitution (DS), partial DS at 2- and 3-O-positions, and the quantitation of each unit in CMX could be acquired simultaneously by this method without decomposing the polymer backbone, thus avoiding errors caused by polymer hydrolysis with traditional methods using HPLC and ¹H NMR spectrometry. Moreover, different from methods of direct detection of carboxyl groups, such as acidometric and potentiometric titrations, this method was not affected by probable impurity introduced during carboxymethylation.

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甘蔗渣羧甲基木聚糖的合成及无损精细结构表征

摘要合成并表征了羧甲基木聚糖（CMX）。开发了一种基于定量13C NMR的方法来获得详细的结构信息。该方法可以在不分解聚合物骨架的情况下同时获得CMX中总取代度（DS）、2-和3-O-位置的部分DS以及每个单元的定量，从而避免了使用HPLC和1H NMR光谱的传统方法由于聚合物水解而引起的误差。此外，与直接检测羧基的方法（如酸滴定法和电位滴定法）不同，该方法不受羧甲基化过程中可能引入的杂质的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.