采用由Cu-salen、吡啶等组成的Cu-salen型仿酶体系对β-O-4型木素模型化合物和三倍体毛白杨磨木木素(MWL)进行仿酶降解的研究,并采用GC-MS等方法分析了该β-O-4型木素模型化合物和磨木木素(MWL)在降解过程中的结构变化。研究表明:Cu-salen型仿酶体系对β-O-4型木素模型化合物和磨木木素(MWL)有较强的降解能力,产生一系列含羟基、醛基和羧基的芳香族低分子化合物。根据反应产物的结构可以说明β-O-4型木素模型化合物的主要降解途径为β-O-4醚键断裂、Cα-Cβ键断裂、烷基-芳基键的断裂和苯环开环反应等。还有一部分MWL成为香草醛和香草酸等低分子化合物,这说明木素在侧链上受到氧化作用,使结构单元之间的连接键断裂。
A biomimetic degradation investigation on β-O-4 lignin model compound triploid of populus tomentosa milled wood lignin ( MWL) was carried out with Cu-salen biomimetic system composed of Cu-salen and pyridine and the structural changes of β-O-4 type model compound and MWL during the reaction was analyzed with GC-MS. The investigation indicated that Cu-salen type biomimetic system has strong degradation ability to MWL phenolic β-O-4 type model compound and a series of aromatic low molecular aromatic compounds...