Issue 2, 2021

Unexpected selective alkaline periodate oxidation of chitin for the isolation of chitin nanocrystals

Abstract

Periodate oxidation reaction occurring directly on chitin has been neglected in polysaccharide chemistry so far. Herein, we present the first direct alkaline periodate oxidation of chitin, which demonstrates at the same time a novel approach for the preparation of chitin nanocrystals (ChNCs). This oxidation is based on an unprecedented selective reaction of non-ordered domains of chitin by the dimeric orthoperiodate ions (H2I2O104−) as the major species in alkaline surroundings. Nearly 50 wt% of non-ordered regions are dissolved after sequential accelerated partial deacetylation, periodate oxidation and β-alkoxy fragmentation, which allows the isolation of up to 50 wt% of uniform anisotropic zwitterionic ChNCs.

Graphical abstract: Unexpected selective alkaline periodate oxidation of chitin for the isolation of chitin nanocrystals

Supplementary files

Article information

Article type
Communication
Submitted
30 Nov 2020
Accepted
24 Dec 2020
First published
24 Dec 2020
This article is Open Access
Creative Commons BY-NC license

Green Chem., 2021,23, 745-751

Unexpected selective alkaline periodate oxidation of chitin for the isolation of chitin nanocrystals

P. Liu, H. Liu, T. Schäfer, T. Gutmann, H. Gibhardt, H. Qi, L. Tian, X. C. Zhang, G. Buntkowsky and K. Zhang, Green Chem., 2021, 23, 745 DOI: 10.1039/D0GC04054A

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