Issue 26, 2016

Chitin-acetate/DMSO as a supramolecular green CO2-phile


The supramolecular chemisorption of CO2 by the oligomeric chitin-acetate (CA) in DMSO as a green solvent offers a novel eco-friendly approach for CO2 capture. Since the amino groups in the sorbent material are blocked either by protonation or acetylation, the multi-armed hydroxyl based oligosaccharide captures CO2 through the formation of an organic carbonate species as confirmed by 13C NMR, in situ ATR-FTIR spectroscopy and conductivity. DFT calculations verified the formation of the CA-CO2 adduct, in which the organic carbonate group is stabilized through supramolecular ionic interaction and hydrogen bonding with the neighboring ammonium ion and hydroxyl functional group along the oligomer backbone. The use of other polar aprotic solvents (N,N-dimethylformamide (DMF), acetonitrile, and acetone) was not successful due to solubility issues.

Graphical abstract: Chitin-acetate/DMSO as a supramolecular green CO2-phile

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Article type
01 Feb 2016
17 Feb 2016
First published
18 Feb 2016
This article is Open Access
Creative Commons BY license

RSC Adv., 2016,6, 22090-22093

Chitin-acetate/DMSO as a supramolecular green CO2-phile

A. F. Eftaiha, F. Alsoubani, K. I. Assaf, W. M. Nau, C. Troll and A. K. Qaroush, RSC Adv., 2016, 6, 22090 DOI: 10.1039/C6RA03022J

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