title: Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA.
abstract: We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)20 DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA-SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.
authors.affiliation: Department of Chemistry, Columbia University, New York, New York 10027, USA. gd2012@columbia.edu
authors.forename: Gordana
authors.initials: G
authors.lastname: Dukovic
authors.forename: Milan
authors.initials: M
authors.lastname: Balaz
authors.forename: Peter
authors.initials: P
authors.lastname: Doak
authors.forename: Nina D
authors.initials: ND
authors.lastname: Berova
authors.forename: Ming
authors.initials: M
authors.lastname: Zheng
authors.forename: Robert S
authors.initials: RS
authors.lastname: McLean
authors.forename: Louis E
authors.initials: LE
authors.lastname: Brus
mesh_terms: D002942:Circular Dichroism; D004247:DNA / Q000737:chemistry*; D008968:Molecular Conformation; D037742:Nanotubes, Carbon / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D004247:DNA