title: IR absorptions of C60(+) and C60(-) in neon matrixes.
abstract: C60(+) ions were produced by electron-impact ionization of sublimed C60, collimated into an ion beam, turned 90° by an electrostatic deflector to separate them from neutrals, mass filtered by a radio frequency quadrupole, and co-deposited with Ne on a cold 5 K gold-coated sapphire substrate. Infrared absorption spectroscopy revealed the additional presence of C60 and C60(-) in the as-prepared cryogenic matrixes. To change the C60(+)/C60(-) ratio, CCl4 or CO2 electron scavengers were added to the matrix gas. Also taking into account DFT calculations, we have identified nine new previously unpublished IR absorptions of C60(+) and seven of C60(-) in Ne matrixes. Our measurements are in very good agreement with DFT calculations, predicting D5d C60(+) and D3d C60(-) ground states. The new results may be of interest regarding the presence of C60 and C70 (as well as ions thereof) in Space.
authors.affiliation: Institute of Physical Chemistry II, Karlsruhe Institute of Technology, Karlsruhe, Germany.
authors.forename: Bastian
authors.initials: B
authors.lastname: Kern
authors.forename: Dmitry
authors.initials: D
authors.lastname: Strelnikov
authors.forename: Patrick
authors.initials: P
authors.lastname: Weis
authors.forename: Artur
authors.initials: A
authors.lastname: Böttcher
authors.forename: Manfred M
authors.initials: MM
authors.lastname: Kappes