SPECTROSCOPY OF CARBON CLUSTER ANIONS IN ARGON MATRICES
Loading...
Date
1996
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Carbon cluster anions ($C_{2a}$ with n=3-18) have been generated via a laser-induced graphite/Ar plasma with low energy electron beam access. The negative carbon cluster ions, partially extracted from a vaporization region, were trapped in an argon matrix at 20K. Absorption bands have been observed from 615 8nm to 6097.5nm. Shorter wavelength bands correspond well to the Ne matrix-isolated, mass selected $C_{6}^{-}$ through $C_{20}^{-}$ cluster bands observed by Maier and coworkers $^{a}$. Longer wavelength bands fit the $0^{\prime\prime}_{0}$ electronic transitions expected by free electron molecular orbital (FEMO) model for the even carbon anion linear chain series well and extend it to $C_{36}^{-}$. The asymmetric mode frequencies for small carbon cluster anions will be reported. The significance of these measurements for observations from unknown species in interstellar space will be discussed.
Description
$^{a}$P.Freivogel, J.Fulara, M.J.Jakobi, D.Forney, and J.P.Maier, J. Chem. Phys. 130, 54(1995)
Author Institution: Department of Chemistry, University of Florida
Author Institution: Department of Chemistry, University of Florida