Cellulose Nanocrystals Incorporating Fluorescent Methylcoumarin Groups

Fluorescent rod-shaped nanoparticles were prepared by attaching hydrazine- or amino-substituted fluorophores onto cellulose nanocrystals (CNC) to form hydrazone and Schiff-base compounds. The products 7-hydrazino-4-methylcoumarin (HMC)–CNC and 7-amino-4-methylcoumarin (AMC)–CNC were examined by ATR-...

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Bibliographic Details
Published in:ACS sustainable chemistry & engineering 2013-09, Vol.1 (9), p.1160-1164
Main Authors: Huang, Jian-Lin, Li, Chao-Jun, Gray, Derek G
Format: Article
Language:English
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Summary:Fluorescent rod-shaped nanoparticles were prepared by attaching hydrazine- or amino-substituted fluorophores onto cellulose nanocrystals (CNC) to form hydrazone and Schiff-base compounds. The products 7-hydrazino-4-methylcoumarin (HMC)–CNC and 7-amino-4-methylcoumarin (AMC)–CNC were examined by ATR-IR, solid-state NMR, ultraviolet–visible absorbance, fluorescence spectroscopy, AFM, TEM, wide-angle XRD, elemental analysis, and X-ray photoelectron spectroscopy (XPS). Estimates of the amount of dye attached to the nanocrystals suggested that substitution was not confined to the reducing end of the nanocrystals. This provides a new route to fluorescent-tagged CNC in an aqueous one-step reaction.
ISSN:2168-0485
2168-0485
DOI:10.1021/sc400074e