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通过大分子反应,将苯甲醛(BA)和邻氨基苯酚(AP)形成的双齿席夫碱配基键合在交联聚甲基丙烯酸缩水甘油酯(CPGMA)微球表面,形成固载有席夫碱配基的载体微球BAAP-CPGMA,再通过与铜盐的配位螯合反应,制备了固载有席夫碱铜配合物的微球[Cu(BAAP)2]-CPGMA.将该固载化铜配合物与均相的2,2,6,6-四甲基哌啶氮氧自由基(TEMPO)构成共催化体系TEMPO/[Cu(BAAP)2]-CPGMA,应用于分子氧氧化苯甲醇的催化氧化过程.我们考察了该共催化体系的催化性能,并探索研究了催化氧化机理.实验结果表明,共催化体系TEMPO/[Cu(BAAP)2]-CPGMA可在温和条件下(室温、常压的氧气)高效地将苯甲醇氧化为苯甲醛(选择性100%,苯甲醛产率93%),并具有良好的循环使用性能.
The bidentate Schiff base ligand formed by benzaldehyde (BA) and o-aminophenol (AP) was bonded to the surface of cross-linked CPGMA microspheres via macromolecule reaction to form a (BAAP-CPGMA) which is a carrier microsphere of Schiff base ligands, and Cu (BAAP) 2] -CPGMA The immobilized copper complex and the homogeneous 2,2,6,6-tetramethylpiperidine nitroxide (TEMPO) form a co-catalytic system TEMPO / [Cu (BAAP) 2] -CPGMA, which is applied to molecules We have investigated the catalytic performance of the cocatalytic system and explored the mechanism of catalytic oxidation.The experimental results show that the co-catalytic system TEMPO / [Cu (BAAP) 2] -CPGMA can be used under mild conditions (Room temperature, atmospheric pressure of oxygen) to the efficient oxidation of benzyl alcohol to benzaldehyde (100% selectivity, 93% yield of benzaldehyde), and has good recycling performance.