Structural Variations of Lignin Macromolecules from Early Growth Stages of Poplar Cell Walls,ACS Sustainable Chemistry & Engineering

当前位置： X-MOL 学术 › ACS Sustain. Chem. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Structural Variations of Lignin Macromolecules from Early Growth Stages of Poplar Cell Walls
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-12-31 , DOI: 10.1021/acssuschemeng.9b05845
Han-Min Wang _{1,

2} , Cheng-Ye Ma _{1,

2} , Han-Yin Li ₃ , Tian-Ying Chen ₂ , Jia-Long Wen _{1,

2} , Xue-Fei Cao ₂ , Xi-Luan Wang ₂ , Tong-Qi Yuan _{1,

2} , Run-Cang Sun _{2,

4}

Affiliation

The natural lignin macromolecule is structurally complex and heterogeneous polymers. Herein, to comprehend the dynamic structural characteristics of poplar (Populus tomentosa) lignin during the growth stages, the native lignins were isolated from poplar woods with different growth stages (3, 6, and 18 months). Meanwhile, the microscopic distribution of lignin and structural features of components in the cell wall of poplar woods were monitored through CRM and CP/MAS ¹³C NMR, respectively. The isolated native lignin samples were synthetically characterized by NMR, GPC, and Py-GC/MS techniques for uncovering the structural variations of lignin during different growth stages. Solution-state 2D-HSQC NMR spectra of the poplar cell wall were also performed to investigate the structural characteristics of the cell wall components in poplar woods. All the results indicated that the lignin macromolecule was gradually polymerized with the increasing growth period of poplar. On the basis of the results obtained, possible structural models of the lignin macromolecule from different growth stages of poplar were proposed. The panoramic picture of chemical and structural characteristics of the lignin macromolecule is significant not only for the understanding of structural variations of the lignin macromolecule in the plant cell walls during different growth stages but also for biomass deconstruction and valorization.

中文翻译：

杨树细胞壁早期生长阶段木质素大分子的结构变异

天然木质素大分子是结构复杂且异质的聚合物。在此，为了理解杨树的动态结构特征（毛白杨）木质素在生长阶段中，天然木质素是从具有不同的生长阶段（3，6和18个月）杨树林隔离。同时，通过CRM和CP / MAS ¹³监测了杨木细胞壁中木质素的微观分布和成分的结构特征。分别为13 C NMR。通过NMR，GPC和Py-GC / MS技术对分离出的天然木质素样品进行了合成表征，以揭示木质素在不同生长阶段的结构变化。还进行了杨树细胞壁的固溶态2D-HSQC NMR光谱研究，以研究杨木中细胞壁成分的结构特征。所有结果表明，木质素大分子随着杨树生长周期的增加而逐渐聚合。根据获得的结果，提出了杨树不同生长阶段木质素大分子的可能结构模型。

更新日期：2019-12-31

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南