CoSalphen在壳聚糖上的固定化及对DOPA的催化氧化研究  

CoSalphen Immobilized onto Chitosan and its Activate in Catalytic Oxidation of DOPA

作　　者：马会宣[1] 胡道道[1] 房喻[1] 

机构地区：[1]陕西师范大学化学系,陕西西安710062

出　　处：《功能高分子学报》2000年第3期301-305,共5页Journal of Functional Polymers

基　　金：陕西省自然科学基金!资助项目 (No .98H0 2 )

摘　　要：制备了二氧化硅担载的壳聚糖固定化双水杨叉邻苯二胺合钴配合物 ,用元素分析 ,红外光谱 ,紫外-可见光谱和荧光光谱等方法对固定化配合物的组成和结构进行了表征。结果表明 :双水杨叉邻苯二胺合钴是通过其钴离子与壳聚糖的氨基氮配位实现其在壳聚糖的固定化。由于高分子固定化配合物对活性中心的基位隔离效应阻碍了双水杨叉邻苯二胺合钴的二聚体及过氧型载氧体的形成而使其对 3,4-二羟基苯基丙氨酸 (多巴 )的催化氧化活性远大于相应的小分子配合物。A silica-supported catalyst, CoSalphen immobilized to chitosan, was prepared. The chitosan film that was coated on the SiO 2 surface has been full characterized by elemental analyses, IR, UV-VIS and Fluorescence spectroscopy. The results show that the immobilization of CoSalphen was through the N in chitosan coordinate to the Co(Ⅱ) in the CoSalphen complex. Because the presenting site isolation effect of in CS-CoSalenphen may inhibit the formation of dimers and μ-oxo-dimers, the immobilized CoSalphen is more efficient than the corresponding monomeric complex in catalysing of oxidation of DOPA.

关 键 词：壳聚糖 多巴催化氧化 CoSalphen 固定化 

分 类 号：O625.636[理学—有机化学] O643.3[理学—化学]