Laser Desorption/Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry of [(Nb6X12)X2(H2O)4] · 4H2O, X=Cl or Br

✍ Scribed by Suzana Martinović; Ljiljana Pasa Tolić; Dunja Srzić; Nenad Kezele; Dejan Plavšić; Leo Klasinc

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 299 KB
• Volume: 10
• Category: Article
• ISSN: 0951-4198
• DOI: 10.1002/(sici)1097-0231(19960115)10:1<51::aid-rcm437>3.0.co;2-#

✦ Synopsis

Tetraaquadodeca-~-halodihalohexaniobium tetrahydrates [(Nb&)Xz(H20),] 4H,O, X = CI or Br, were studied using laser desorption/ionization (LDI) Fourier transform ion cyclotron resonance mass spectmuwtry. Only negative ions were found to form in the gas phase under LDI conditions. The quasimolecular ion, M-= [(Nb&)X2 1and the fragment Ions, [M -X.1-, = 1-3, are the highest abundance ions in the LDI mass spectra, indicating the stability of the core duster, (Nbs,,). Clusters with chlorine atoms as Ugands show relatively high af6nity for an additional chlorine atom, while clusters with bromine atoms as Ugands pmfer to lose a bromine atom. The results are compared with those of mass spectra of analogous tantalum clusters.