New insights into the autofluorescence properties of cellulose/nanocellulose

This work explored the fluorescence properties of nano/cellulose isolated from bleached softwood kraft pulp by TEMPO oxidation. Fluorescence spectra showed that all samples exhibited a typical emission peak at 574 nm due to the probabilistic formation of unsaturated bonds by glycosidic bonds indepen...

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Bibliographic Details
Published in:Scientific reports 2020-12, Vol.10 (1), p.21387-21387, Article 21387
Main Authors: Ding, Qijun, Han, Wenjia, Li, Xia, Jiang, Yifei, Zhao, Chuanshan
Format: Article
Language:English
Subjects:
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Cellulose
Chemical perception
Chemoreception
Emissions
Fluorescence
Fluorescence spectroscopy
Humanities and Social Sciences
Lignin
multidisciplinary
Oxidation
Polarity
Pulp
Science
Science (multidisciplinary)
Softwoods
Spectrum analysis
Wavelengths
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Summary:This work explored the fluorescence properties of nano/cellulose isolated from bleached softwood kraft pulp by TEMPO oxidation. Fluorescence spectra showed that all samples exhibited a typical emission peak at 574 nm due to the probabilistic formation of unsaturated bonds by glycosidic bonds independent of lignin. Increasing the excitation wavelengths (510–530 nm) caused red shift of fluorescence emission peaks (570–585 nm) with unchanged fluorescence intensity. Conversely, changing acid/alkaline conditions led to an increase of fluorescence intensity with no shifting of fluorescence emission peak. This can be attributed to an increase in the polarity of the solution environment but does not cause interaction of functional groups within the system identified by generalized two-dimensional correlation fluorescence spectroscopy. This study provides new insight in applying nano/cellulose with special luminous characteristics in biomedicine area such as multi-color biological imaging and chemical sensing.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-78480-2