کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1529565 | 995760 | 2012 | 9 صفحه PDF | دانلود رایگان |
Due to their natural origin, biocompatibility, and non-toxicity, cellulose nanocrystals are promising candidates for applications in nanomedicine. Highly fluorescent nanocellulosic material was prepared via surface modification of cellulose nanocrystals with 2,2′:6′,2″-terpyridine side chains followed by supramolecular assembly of terpyridine-modified perylene dye onto the terpyridine-modified cellulose nanocrystals (CTP) via RuIII/RuII reduction. The prepared terpyridine-modified cellulose-RuII-terpyridine-modified perylene (CTP-RuII-PeryTP) fluorescent nanocrystals were characterized using cross-polarized/magic angle spin 13C nuclear magnetic resonance (CP/MAS 13C NMR), Fourier transform infrared (FTIR), UV–visible, and fluorescence spectroscopy. In addition, further self-assembly of terpyridine units with azide functional groups onto CTP-RuII-PeryTP was possible via repeating the RuIII/RuII reduction protocol to prepare supramolecular fluorescent nanocrystals with azide functionality (CTP-RuII-PeryTP-RuII-AZTP). The prepared derivative may have potential application in bio-imaging since the terminal azide groups can be easily reacted with antigens via “Click” chemistry reaction.
► Surfaces of cellulose nanocrystals were modified with terpyridine ligands.
► Fluorescent nanocrystals could be obtained via self-assembly of terpyridine-modified perylene dye onto the terpyridine-modified cellulose nanocrystals.
► Further self-assembly of azide-functionalized terpyridine onto the fluorescent cellulose nanocrystals was possible to obtain nanocellulosic material with expected use in bioimaging.
Journal: Materials Science and Engineering: B - Volume 177, Issue 4, 15 March 2012, Pages 350–358