High population of individualized SWCNTs through the adsorption of water-soluble perylenes.
The aqueous dispersion of SWCNTs in the presence of the water-soluble perylene derivatives 1-3 is reported. Significantly, even very low concentrations of the perylenes such as 0.01 wt% of the amphiphilic derivative 3, cause an efficient dissolution of the SWCNTs in water accompanied by a very pronounced individualization. The individualization of SWCNTs in water after ultrasonication in the presence of water-soluble aromatic perylenes was investigated in detail by absorption, emission, and Raman spectroscopy as well as by AFM and cryo-TEM. These studies also revealed that the individualization of the SWCNTs caused by the adsorption of 3 is much more effective than that induced by SDBS, which is the most frequently used surfactant for SWCNT dispersion in water. The pi-pi-stacking interaction and the electronic interaction between the perylene unit and the nanotube surface is reflected, for example, by the distinct absorption and emission features in the UV/vis/nIR, which differ significantly from those observed for SWNTs dispersed in the presence of SDBS and by the quenching of the perylene fluorescence of 3 when being in contact with the tubes.
Backes
Claudia
C
Department of Chemistry and Pharmacy & Central Institute of Advanced Materials and Processes (ZMP), University of Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany.
Schmidt
Cordula D
CD
Hauke
Frank
F
Böttcher
Christoph
C
Hirsch
Andreas
A
D000327:Adsorption; D008958:Models, Molecular; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D012995:Solubility; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D014867:Water / Q000737:chemistry
D037742:Nanotubes, Carbon; D014867:Water; D010569:Perylene