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用红外光谱研究了Cu-D370催化漆酚氧化聚合交联过程。在漆酚氧化聚合阶段,漆酚醌的特征吸收峰先涨后落;三取代苯型结构变为四取代联苯型;共轭双烯型结构变为共轭三烯型;并出现Ar-O-R型醚结构。所以漆酚的氧化聚合反应主要发生在苯环上。在漆酚聚合物交联阶段,双键数目迅速减少,共轭三烯也减少。而α,β—不饱和醛或酮以及不饱和醚型结构却逐渐增加。所以交联反应主要发生在漆酚的侧链上。这些结果表明,在漆酚氧化聚合交联过程中Cu-D370模拟了漆树酶和固定化漆树酶的催化作用。
The oxidative polymerization of Cu-D370 catalyzed urushiol was studied by infrared spectroscopy. During the oxidative polymerization of urushiol, the characteristic absorption peak of urushiol quinone first rose and then dropped; the tri-substituted benzene structure changed to the tetra-substituted biphenyl type; the conjugated diene structure became conjugated triene; and Ar- OR ether structure. Therefore, the oxidative polymerization of urushiol occurs mainly in the benzene ring. During the cross-linking phase of urushiol polymer, the number of double bonds rapidly decreases and the amount of conjugated triene decreases. The α, β-unsaturated aldehydes or ketones and unsaturated ether type structure is gradually increased. So cross-linking reaction occurs mainly in the side chain of urushiol. These results indicate that Cu-D370 mimics the catalysis of laccase and immobilized enolase during the oxidative polymerization of urushiol.