摘要
壳聚糖与3,5-二叔丁基水杨醛反应生成壳聚糖希夫碱,进一步合成壳聚糖固载的salen配体,然后将其与钴盐配位得到配合物。用FTIR等表征配合物的结构,并探讨该配合物催化水解动力学拆分环氧氯丙烷的催化性能。研究结果表明:在20℃,壳聚糖固载salen Co(Ⅲ)(CF3COO)用量为0.25 mol%,水用量为环氧氯丙烷的0.55倍,反应8 h,环氧氯丙烷的ee值达到99.8%,该配合物重复使用3次还可保持较好的催化活性。
Chitosan schiff base was synthesized via the reaction of chitosan with 3,5-bis（1, 1-dimethylethyl）-2-hydroxy-benzaldehyde. Chitosan supported salen Co complexs was obtained by reaction of chitosan supported salen with Co salt. The structure of complexe was characterized through FTIR. Furthermore, the catalytic activity of chitosan supported salen Co complexes for hydrolytic kinetic resolution of epichlorohydrin was investigated. The result indicated that chitosan supported salen Co（m）（CF3COO） keeps high catalytic activity for the kinetic resolution of epichlorohydrin. Under the condition that the temperature is 20 ℃, the concentration of the catalyst is 0. 25 mol%, the ratio of water to the epichlorohydrin is 0. 55 the e. e. of the （S）-epichlorohydrin reaches 99.8% in 8 hours.
出处
《浙江科技学院学报》
CAS
2011年第3期177-181,共5页
Journal of Zhejiang University of Science and Technology
基金
浙江科技学院科研启动基金项目(F015103902)
