Salen配合物的合成及其催化性能  

Synthesis and Catalytic Properties of Salen Complexes

作　　者：黄素素[1] 林佳乐[1] 黄倩雯[1] 孔黎春[1] 章康达 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004

出　　处：《实验室研究与探索》2016年第8期52-55,共4页Research and Exploration In Laboratory

基　　金：浙江师范大学高层次人才科研基金(ZC323015094;ZC304015036)

摘　　要：以水杨醛和乙二胺为原料制备Salen配体,再进一步与金属离子络合制备Salen配合物[M(Salen)](M=Co,Cu,Zn,Ni),并用于空气氧化安息香合成苯偶酰反应体系的催化剂。以绿色化学的理念为出发点,对反应溶剂、温度、催化剂用量等一系列反应条件进行优化筛选后,发现该反应在室温下,以95%乙醇为溶剂,当量比为安息香/Co(Salen)/KOH=1.00∶0.08∶1.40时,苯偶酰的产率最高可达90.7%。通过沉淀、洗涤等操作,能够有效回收催化剂,并且催化剂循环使用3次后,产物苯偶酰仍有可观的产率。与目前常见的苯偶酰合成方法相比,该实验合成方法具有环境友好、能耗低、操作更加简便等特点,是一条简单绿色的高效合成苯偶酰的途径。As an important organic chemical raw material,benzil could be synthesized through the oxidization of benzoin by using Salen complexes as catalyst, which is a mature synthetic route but still suffered from issues such as environmentally unfriendly,complicated operation procedures and so on. From the viewpoint of green chemistry,a series of new Salen ligands have been designed and synthesized from salicylaldehyde and ethylene diamine precursors and several Salen complexes [M（ Salen） ]（ M = Co,Cu,Zn,Ni） were then obtained,which have been successfully used in the catalytic oxidization reaction of benzoin compounds. The investigation data revealed that benzil compounds could be obtained in a high yield of 90. 7% when benzoin,（ Co） Salen catalyst and base（ KOH） were mixed in a ratio of1. 00∶ 0. 08∶ 1. 40 in ethanol at room temperature. Moreover,the（ Co） Salen catalyst could be recovered effectively by precipitating and washing,and the yield of benzil products still remained as high as about 60% after three cycles,which make this new green approach takes the advantages of more environmentally friendly,lower energy consumption and easier operation procedures compared to that of traditional method.

关 键 词：SALEN配合物 苯偶酰 安息香 催化氧化 绿色化学 

分 类 号：O621.3[理学—有机化学]