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https://www.ias.ac.in/article/fulltext/jcsc/126/03/0801-0805

Immobilized complexes; alkene oxidation; hydrogen peroxide; ionic liquid; MCM-41.

A series of Fe(III) Schiff base complexes immobilized on MCM-41 were prepared and characterized by various physicochemical and spectroscopic methods. The complexes were used for oxidation of cyclohexene by 30% hydrogen peroxide in the presence and absence of ethylmethyl imidazolium chloride (EMIM) ionic liquid as solvent. The immobilized complexes proved to be effective catalysts and generally exhibited much higher catalytic performance than their homogeneous analogue. Catalytic performance of the complexes was also found to be closely related to the Schiff base ligands used. Additionally, ion liquid solvent efficiently improved all the catalytic performances. Finally, the reaction was extended to different alkenes using the heterogeneous complex 2-L₄. Among all the alkenes, those containing 𝜋-electron-withdrawing groups and trans-orientations exhibited lower tendency for oxidation.

Mohammad Taghi Goldani¹ Ali Mohammadi² Reza Sandaroos³

1. Department of Chemical Engineering, Birjand Branch, Islamic Azad University, Birjand 9717851367, Iran
2. Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, PO Box 91775, Mashhad, Iran
3. Department of Chemistry, Faculty of Sciences, University of Birjand, Birjand, Iran

Published

May 2014

Manuscript received

11 March 2012

Manuscript revised

24 January 2014

Accepted

27 January 2014