Resonance Raman Optical Activity Spectra of Single-Walled Carbon Nanotube Enantiomers

By Martin Magg, Yara Kadria-Vili, Patric Oulevey, R. Bruce Weisman, Thomas Bürgi

July 28, 2017

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Title

Resonance Raman Optical Activity Spectra of Single-Walled Carbon Nanotube Enantiomers

Author

Martin Magg, Yara Kadria-Vili, Patric Oulevey, R. Bruce Weisman, Thomas Bürgi

Year

2016

Journal

Journal Physical Chemistry Letters

Abstract

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 E22Stransition 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.

Full Article

http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.5b02612

Instrument

J-815

Keywords

Circular dichroism, Nanostructures, Materials