Multiphoton fragmentation spectra of zirconium and niobium cluster cations

Aydin M., Lombardi J. R.

International Journal of Mass Spectrometry, cilt.235, sa.1, ss.91-96, 2004 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 235 Sayı: 1
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.ijms.2004.04.004
  • Dergi Adı: International Journal of Mass Spectrometry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.91-96
  • Anahtar Kelimeler: Laser vaporization, Multiphoton fragmentation, Niobium, Time-of-flight mass spectroscopy, Zirconium
  • Ondokuz Mayıs Üniversitesi Adresli: Hayır

Özet

The dissociation energies of the mass-selected zirconium dimer cation (90Zr2+) and niobium cation clusters, Nb 2+ and Nb4+, were investigated using laser vaporization techniques coupled with time-of-flight (TOF) mass spectroscopy for production of jet-cooled cationic cluster beams. The selected cationic species were then fragmented by irradiation with an Nd:YAG-pumped (532 nm), tunable-pulsed PDL dye laser in the 15,500-18,500 cm-1 region. Dissociation energies were directly measured from a significant sharp rise in the spectral background as D0(90Zr2 +)=4.18±0.01, D0(Nb2+)=5. 94±0.01, and D0(Nb+3-Nb)=5.994±0. 004 eV. We also estimate the first ionization energy of 90Zr 2+ to be 5.82±0.01 eV using the thermochemical cycle. © 2004 Elsevier B.V. All rights reserved.