Study of the sedge (Carex) lignin by high-resolution mass spectrometry and NMR spectroscopy

被引：10
作者：
Pikovskoi, I. I. [1 ]
Kosyakov, D. S. [1 ]
Faleva, A., V [1 ]
Shavrina, I. S. [1 ]
Kozhevnikov, A. Yu [1 ]
Ul'yanovskii, N., V [1 ]
机构：
[1] MV Lomonosov Northern Arctic Fed Univ, Core Facil Ctr Arktika, 17 Nab Severnoi Dviny, Arkhangelsk 163002, Russia
来源：
RUSSIAN CHEMICAL BULLETIN | 2020年 / 69卷 / 10期
基金：
俄罗斯科学基金会; 俄罗斯基础研究基金会;
关键词：
lignin; structure; Cá rex sedge; herbaceous plants; mass spectrometry; nuclear magnetic resonance; STRUCTURAL-CHARACTERIZATION; STRAW;
D O I：
10.1007/s11172-020-2992-3
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A combination of high-resolution mass spectrometry based on an orbital ion trap and 2D NMR spectroscopy was first applied to the characterization of the structure of poorly studied lignins of herbaceous plants using dioxane lignin from sedge (Carex) as an example. Macromolecules of the Carex lignin are found to be constructed from guaiacyl, syringyl, and p-hydroxyphenyl structural units in a ratio of 57:22:21 bound mainly by ether beta-O-4 bonds. The key role of p-hydroxycinnamic acids in the formation of the lignin structure and ester bonds with polysaccharides was shown. A possible structural formula of the macromolecule fragment of the Carex lignin was proposed on the basis of an analysis of the 2D NMR spectra (HSQC).
引用
收藏
页码：2004 / 2012
页数：9
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