Abstract
Metal−carbon compound clusters of Ti, Zr, V, and Nb are produced by laser vaporization in a pulsed nozzle cluster source. The distribution of neutral clusters is investigated by time-of-flight mass spectrometry, with photoionization at a variety of laser wavelengths. Laser wavelength and power dependence studies are used to investigate ionization potentials of different metal−carbon clusters and the role of fragmentation in the appearance of mass distributions. The M8C12 met-car clusters of zirconium, vanadium, and niobium have vertical ionization potentials greater than 5.76 eV. Ti8C12 has a vertical ionization potential of 4.9 ± 0.2 eV.
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