Diaquabis(L-phenylalaninato)nickel(II) encapsulated in zeolite: an efficient heterogeneous catalyst system for the oxidation of cyclohexene, toluene and ethyl benzene

Journal of the Brazilian Chemical Society

Massomeh Ghorbanloo²  Somayeh Ghamari²  Nahid Shahbakhsh²  Seik Weng Ng¹ 

[1] ,University of Zanjan Faculty of Science Department of ChemistryZanjan,Iran

关键词: encapsulated catalyst;    zeolite;    heterogeneous;    hydrogen peroxide;    co-catalyst;   

DOI  :  10.5935/0103-5053.20140194

来源: SciELO

【 摘 要 】

L-Phenylalanine reacts with nickel-exchanged zeolite Y to form diaquabis(L-phenylalaninato)nickel(II), which is encapsulated in the pores of the zeolite. In this zeolite-encapsulated form, the nickel derivative functions as an efficient catalyst when cyclohexene, toluene and ethyl benzene are oxidized by hydrogen peroxide in the presence of sodium bicarbonate (as co-catalyst). The catalyst was readily recovered from the reaction mixture, and it could be re-used for other three runs without noticeable loss of activity. The heterogeneous catalyst exhibited significantly higher activity and selectivity compared with diaquabis(L-phenylalaninato)nickel(II) itself.

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