NEW INSIGHTS INTO THE MOLECULAR ARCHITECTURE OF HARDWOOD LIGNINS BY CHEMICAL DEGRADATIVE METHODS

被引：234

作者：

LAPIERRE, C ^{[1
]}

POLLET, B ^{[1
]}

ROLANDO, C ^{[1
]}

机构：

[1] ECOLE NORMALE SUPER,CHIM LAB,F-75231 PARIS 05,FRANCE

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 1995年 / 21卷 / 3-5期

关键词：

D O I：

10.1007/BF03052266

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lignins are composed of phenylpropane units interconnected by labile and resistant bonds. A two-step degradation, thioacidolysis, provides detailed information on these network polymers. The fist step involves lignin depolymerization with ethanethiol and BF3 etherate. The determination of the recovered thioethylated monomers provides an estimation of lignin units only involved in labile ether bonds. The lignin-derived dimers, representative of resistant interunit bonds, are determined after a further desulfurization step. Results obtained for native and industrial hardwood lignins underline their structural differences. Native hardwood lignins are typified by a high proportion of linear fragments linked bifunctionally by beta-O-4 bonds.

引用

页码：397 / 412

页数：16

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