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- Title
Self-Assemblies of Single-Walled Carbon Nanotubes through Tunable Tethering of Pyrenes by Dextrin for Rapidly Chiral Sensing.
- Authors
Wei-Li Wei; Qiushui Chen; Haifang Li; Jin-Ming Lin
- Abstract
Pyrene-modified dextrin (Py-Dex) was synthesized via the Schiff base reaction between reducing end of dextrins and 1-aminopyrene, and then self-assemblies of single-walled carbon nanotubes (SWNTs) were fabricated through the tunable tethering of pyrene to SWNTs by dextrin chains. The Py-Dex-SWNTs assemblies were found to be significantly water-soluble because of the synergistic effect of dextrin chains and pyrene moieties. Py-Dex and Py-Dex-SWNTs were adequately characterized by NMR, UVvis, fluorescence spectroscopy, Raman spectroscopy, matrix-assisted laser desorption/ionization-time of flight mass spectroscopy, and transmission electron microscopy. The tethering effect of dextrin toward pyrene moieties was clearly revealed and was found to be tunable by adjusting the length of dextrin chains. The fluorescence of pyrenemoieties was sufficiently quenched by SWNTs with the support of dextrin chains. Furthermore, the Py-Dex-SWNTs assemblies were used for chiral selective sensing by introducing cyclodextrins as chiral binding sites. The rapid chiral sensing was successfully tested for different enantiomers.
- Subjects
CARBON nanotubes; PYRENE; DEXTRINS; CHIRAL drugs; CHIRALITY; DRUG synergism; RAMAN spectroscopy; FLUORESCENCE spectroscopy
- Publication
International Journal of Analytical Chemistry, 2011, Vol 2011, p1
- ISSN
1687-8760
- Publication type
Article
- DOI
10.1155/2011/862692