1 research outputs found
Resonance Raman Optical Activity Spectra of Single-Walled Carbon Nanotube Enantiomers
We
present experimental Raman optical activity (ROA) spectra of
enantio-enriched single-walled carbon nanotubes (SWCNTs). Enantiomeric
samples of (6,5) SWCNTs were prepared using nonlinear density gradient
ultracentrifugation (DGU). Upon excitation at 2.33 eV, remarkably
strong G-band signals are obtained due to strong resonance enhancement
with the E<sub>22</sub><sup>S</sup> transition of (6,5) SWCNTs. Enhancement
allows measuring the vibrational optical activity (VOA) at unusually
low concentrations. The obtained results are in good agreement with
the single-excited-state theory (SES). To our knowledge, these are
the first experimental VOA spectra of SWCNTs