Journal
CHEMPHYSCHEM
Volume 10, Issue 13, Pages 2251-2255Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200900246
Keywords
dyes/pigments; fluorescence spectroscopy; rhodamine B; static quenching; nanotubes
Funding
- German Federal Ministry of Education and Research (BMBF) [IDO3X5516]
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We report here on the interaction of the fluorescent dye rhodamine B (RB) with single-walled carbon nanotubes (SWCNTs). We observe that SWCNTs statically quench the fluorescence of RB by forming a stable ground state complex. Careful spectroscopic analysis indicates that the complex formation is efficient mainly with certain chiral forms. We propose three different applications utilizing this quenching mechanism and the associated complexation. Firstly, the quenching efficiency can be utilized as a measure for the characterization and quantification of nanotube dispersions. Secondly, we demonstrate that the specific complexation of RB can be deployed to enrich certain chiral forms in suspension. Finally, we show that RB can be effectively used to visualize nanotubes deposited on substrates.
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