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Laser Desorption/Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry of [(Nb 6 X 12 )X 2 (H 2 O) 4 ] · 4H 2 O, X=Cl or Br
Author(s) -
Martinović Suzana,
Tolić Ljiljana Pasa,
Srzić Dunja,
Kezele Nenad,
Plavšić Dejan,
Klasinc Leo
Publication year - 1996
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19960115)10:1<51::aid-rcm437>3.0.co;2-#
Subject(s) - fourier transform ion cyclotron resonance , chemistry , mass spectrometry , analytical chemistry (journal) , ion , ionization , ion cyclotron resonance , fourier transform , fourier transform spectroscopy , atomic physics , laser , cyclotron , physics , infrared spectroscopy , optics , organic chemistry , chromatography , quantum mechanics
Tetraaquadodeca‐μ‐halodihalohexaniobium tetrahydrates [(Nb 6 X 12 )X 2 (H 2 O) 4 ] · 4H 2 O, X=Cl or Br, were studied using laser desorption/ionization (LDI) Fourier transform ion cyclotron resonance mass spectrometry. Only negative ions were found to form in the gas phase under LDI conditions. The quasimolecular ion, M − =[(Nb 6 X 12 )X 2 ] − and the fragment ions, [M−X n fx100 ] − , n =1–3, are the highest abundance ions in the LDI mass spectra, indicating the stability of the core cluster, (Nb 6 X 12 ). Clusters with chlorine atoms as ligands show relatively high affinity for an additional chlorine atom, while clusters with bromine atoms as ligands prefer to lose a bromine atom. The results are compared with those of mass spectra of analogous tantalum clusters.