Co-salen型仿酶体系降解β-O-4型木素模型化合物的研究  

The Study of Biomimetic Degradation of β-O-4 Type Lignin Model Compound with Co-salen System

作　　者：高洪贵[1] 谢益民[2] 孙媛芳[1] 

机构地区：[1]山东轻工业学院造纸科学与技术省部共建教育部重点实验室,山东济南250353 [2]湖北工业大学化学与环境工程学院,湖北武汉430068

出　　处：《造纸科学与技术》2009年第5期1-4,共4页Paper Science & Technology

基　　金：国家自然科学基金项目(20674046)

摘　　要：为了研究Co-salen型仿酶体系对木素的降解机理,采用由Co-salen、吡啶、H2O2、O2组成的Co-salen型仿酶体系对β-O-4型木素模型化合物——愈创木基丙三醇-β-愈创木基醚进行仿酶降解的研究,并采用GC-MS等方法分析了该β-O-4型木素模型化合物在降解过程中的结构变化,在此基础上对这种仿酶体系降解的机理进行了初步探讨。研究表明:Co-salen型仿酶体系对β-O-4型木素模型化合物有较强的降解能力,降解后产生一系列含羟基、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。本研究为该仿酶降解体系在无污染漂白工业上的应用提供理论依据。In order to understand reaction mechanism of lignin with Co - salen, a lignin model compound of phenolic β - 0 - 4 type, i.e. guaiacylglyeerol - β - guaiacyl ether were treated with a novel delignification system using Co（ Ⅱ ）salen, pyridine, hydrogen peroxide, oxygen（ Co -salen system）. The GC -MS analysis was used to investigate the change of chemical structure of β - 0 - 4 type model compound during the reaction. Mechanism of this biomimetic delignification was also discussed. Results showed that Co- salen type biomimetic system had strong ability in degradation of MWL phenolic β - O -4 type model compound. After degradation, a series of low molecular aromatic compounds containing carboxyl, hydroxyl and earbonyl groups were produced. From their structures, it is suggested that the following reactions were caused by the Co - salen system ： ether - bond cleavage, Cα -Cβ cleavage,alkyl- aryl cleavage and aromatic ring opening. Consequently, this work provides a convictive information about Co- salen biomimetic delignification system that could be applied to industrial non- pollution bleaching.

关 键 词：木素模型化合物 愈创木基丙三醇-β-愈创木基醚 仿酶降解 Co—salen仿酶体系 

分 类 号：TQ351.013[化学工程]