Jump to main content
Jump to site search

Issue 6, 2014
Previous Article Next Article

Catalytic olefin epoxidation over cobalt(ii)-containing mesoporous silica by molecular oxygen in dimethylformamide medium

Author affiliations

Abstract

A cobalt(II) Schiff base complex has been immobilized onto the surface of Si–MCM-41 to prepare a new catalyst. The amine group-containing organic moiety 3-aminopropyl-triethoxysilane had first been anchored on the surface of Si–MCM-41 via a silicon alkoxide route. Upon condensation with salicylaldehyde, the amine group affords a bidentate Schiff-base moiety in the mesoporous matrix, which is subsequently used for anchoring of cobalt(II) centers. The prepared catalyst has been characterized by UV-vis, infrared (IR), EPR spectroscopic and small angle X-ray diffraction (XRD) analyses, and N2 sorption studies. The catalytic activity was tested in epoxidation reactions of olefinic compounds, including styrene and allyl alcohol, with molecular oxygen at atmospheric pressure in dimethylformamide medium in the absence of additional sacrificial reductant. The reactions seemed to proceed through a radical formation mechanism. The immobilized catalyst showed good activity and epoxide selectivity in the alkene epoxidation. Notably, the catalyst can be recovered and reused without any loss of activity.

Graphical abstract: Catalytic olefin epoxidation over cobalt(ii)-containing mesoporous silica by molecular oxygen in dimethylformamide medium

Back to tab navigation

Supplementary files

Article information


Submitted
20 Jan 2014
Accepted
25 Feb 2014
First published
17 Apr 2014

Catal. Sci. Technol., 2014,4, 1820-1828
Article type
Paper
Author version available

Catalytic olefin epoxidation over cobalt(II)-containing mesoporous silica by molecular oxygen in dimethylformamide medium

S. Bhunia, S. Jana, D. Saha, B. Dutta and S. Koner, Catal. Sci. Technol., 2014, 4, 1820
DOI: 10.1039/C4CY00084F

Social activity

Search articles by author

Spotlight

Advertisements