Vibrational Spectroscopy of Gas-Phase Metal-Carbide Clusters and Nanocrystals
Deniz van Heijnsbergenand FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, NL-3430 BE Nieuwegein, The NetherlandsGert von Heldenand FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, NL-3430 BE Nieuwegein, The NetherlandsMichael A. DuncanDepartment of Chemistry, University of Georgia, Athens, Georgia 30602André J. A. van Roijand FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, NL-3430 BE Nieuwegein, The NetherlandsGerard Meijerand FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, NL-3430 BE Nieuwegein, The Netherlands
1999en
ABI
Annotatsiya
Neutral $\mathrm{Ti}{}_{8}\mathrm{C}{}_{12}$ and $\mathrm{Ti}{}_{14}\mathrm{C}{}_{13}$ clusters are produced in the gas phase with pulsed-nozzle laser vaporization. Infrared multiphoton excitation with a pulsed free-electron laser results in thermionic electron emission for these clusters, and the parent molecular ions are detected. Multiphoton ionization is strongly enhanced on vibrational resonances of these clusters, making it possible to observe infrared resonance-enhanced multiphoton ionization spectra. These spectra indicate C-C bonding for the ``met-cars'' while $\mathrm{Ti}{}_{14}\mathrm{C}{}_{13}$ has remarkable similarities to bulk TiC.
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