Direct Evidence for Reaction between Cellulose and CO2from Nuclear Magnetic Resonance

The direct reaction between carbohydrates and CO2 has recently attracted attention in the context of cellulose dissolution and derivatization as well as carbon capture applications. We have directly demonstrated the formation of cellulose carbonate upon the introduction of CO2 into a non-aqueous cel...

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Bibliographic Details
Published in:ACS Sustainable Chemistry & Engineering
Main Authors: Gunnarsson, Maria, Bernin, Diana, Hasani, Merima, Lund, Mikael, Bialik, Erik
Language:unknown
Published: 2021
Subjects:
NMR
Online Access:https://doi.org/10.1021/acssuschemeng.1c05863
https://research.chalmers.se/en/publication/526923
Description
Summary:The direct reaction between carbohydrates and CO2 has recently attracted attention in the context of cellulose dissolution and derivatization as well as carbon capture applications. We have directly demonstrated the formation of cellulose carbonate upon the introduction of CO2 into a non-aqueous cellulose solution by nuclear magnetic resonance spectroscopy. Comparison of the observed spectra with accurate electronic structure calculations of the changes in chemical shifts upon reaction allowed us to confirm the expectation that CO2 reacts with the hydroxyl group on carbon 6 of the cellulose but not exclusively this hydroxyl group. We found good agreement between predicted and measured chemical shifts using a simple computational method.