担载树状高分子铜配合物催化氧化乙基苯性能研究

Catalysis of Polymer Supported Dendritic Copper Complexes for Oxidation of Ethylbenzene

应用简单、洁净的固相合成方法合成了氯球(氯甲基聚苯乙烯)担载的1-6代聚酰胺-胺树状分子金属铜配合物,通过IR、ICP和XPS对配体和配合物的结构进行了表征,将此类配合物用作在无溶剂情况下分子氧氧化乙基苯的催化剂,研究了其催化性能,并探讨了反应温度、反应时间、催化剂用量、酸碱添加剂以及催化剂重复利用对反应的影响.研究结果表明此类配合物对乙基苯的氧化反应具有一定的催化活性,反应以苯甲酮,1-苯基乙醇,苯偶姻为主要产物.此催化体系使用环境友好的氧化剂,催化剂制备方法简单、催化剂在多次重复利用后活性没有明显降低,可回收和重复利用.

Chloromethyl polystyrene supported dendritic copper complexes were prepared by solid phase synthesis method.The complexes were characterized by IR spectroscopy,XPS and ICP.These complexes all show promising catalytic activities for the oxidation of ethylbenzene under 110 ℃ and 0.1 MPa pressure of molecular oxygen.The oxidation gives acetophenone,1-phenylethanol and benzoin as major products.Benzoin is directly formed from the oxidation of ethylbenzene and the result is first reported in this type of oxidation system.The factors that affect the oxidation were also primarily discussed.The catalysts could be obtained in a simple and efficient manner.Moreover,the catalysts can be recycled for several times without the obvious decrease of the activity.