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Issue 23, 2017
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Substituent dependence of imidazoline derivatives on the capture and release system of carbon dioxide

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Abstract

The reversible capture–release behaviors of CO2 by imidazoline derivatives bearing several 2-substituents were investigated under dry conditions containing a very small amount of water. The imidazoline having a cyclic guanidine moiety only captured CO2 quantitatively, and then the cyclic guanidine derivative gave the guanidinium bicarbonate by CO2 fixation together with a slight amount of water. In contrast, the imidazolines bearing n-butylthiol and n-pentyl groups never captured CO2 even with the addition of an equimolar amount of water. Furthermore, the binding structure between CO2 and the cyclic guanidine derivative was studied in detail by elemental analysis, FTIR-ATR, solid-state NMR, TGA, and DFT calculations in order to predict the CO2 capture–release mechanisms depending on the imidazoline structure.

Graphical abstract: Substituent dependence of imidazoline derivatives on the capture and release system of carbon dioxide

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Publication details

The article was received on 22 Aug 2017, accepted on 24 Oct 2017 and first published on 25 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ03133E
Citation: New J. Chem., 2017,41, 14390-14396
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    Substituent dependence of imidazoline derivatives on the capture and release system of carbon dioxide

    Y. Yoshida, N. Aoyagi and T. Endo, New J. Chem., 2017, 41, 14390
    DOI: 10.1039/C7NJ03133E

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