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Issue 8, 2012
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A novel approach of utilizing quaternized chitosan as a catalyst for the eco-friendly cycloaddition of epoxides with CO2

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Abstract

A novel attempt of using quaternized chitosan (QCHT) as a catalyst for the cycloaddition reaction of allyl glycidyl ether (AGE) and CO2 under solvent-free conditions has been made. The surface quaternization of CHT has been characterized by means of various physicochemical methods, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and elemental analysis. The effects of reaction parameters like catalyst amount, reaction time, reaction temperature, and CO2 pressure have been investigated. The catalyst system was recyclable and was reused. It has been demonstrated that the inherently present hydroxyl group in the catalyst had a synergistic effect with halide anions, and a high yield of cyclic carbonates and excellent selectivity could be obtained under optimum conditions. These results reveal that QCHT is an efficient and environmentally friendly catalyst for the cycloaddition reaction.

Graphical abstract: A novel approach of utilizing quaternized chitosan as a catalyst for the eco-friendly cycloaddition of epoxides with CO2

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Publication details

The article was received on 05 Mar 2012, accepted on 18 Apr 2012 and first published on 20 Apr 2012


Article type: Paper
DOI: 10.1039/C2CY20137B
Catal. Sci. Technol., 2012,2, 1674-1680

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    A novel approach of utilizing quaternized chitosan as a catalyst for the eco-friendly cycloaddition of epoxides with CO2

    J. Tharun, Y. Hwang, R. Roshan, S. Ahn, A. C. Kathalikkattil and D. Park, Catal. Sci. Technol., 2012, 2, 1674
    DOI: 10.1039/C2CY20137B

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