LI Guilin^1*, LEI Ziqiang², MA Hengchang², YANG Quanlu¹

(1.College of Chemical Engineering, Gansu Lianhe University, Lanzhou 730000, China; 2. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China)

Abstract: Chloromethyl polystyrene supported dendritic copper complexes were prepared by solid phase synthesis methodology. 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 1 atmospheric 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. 

Key words: dendrimer; copper complexes; ethylbenzene; catalytic oxidation 

E-mail: licl7305@163.com 

Journal of Molecular Catalysis, Vol. 26, Issue 5, 2012, 406-413