Generation of Supraclusters and Nanoclusters Using Laser Desorption Ionisation Mass Spectrometry

摘要: Laser desorption/ionisation of discrete molecular clusters combined with time-of-flight (TOF) or Fourier-transform ion cyclotron resonance (FTICR) mass spectrometry affords spectra in which extensive higher are observed. The size the largest cluster aggregates (or supraclusters) is same order magnitude as nanoclusters. obtained using TOF sometimes exhibit post-source decay fragmentation, depending upon operational conditions employed during data acquisition, which, although providing useful on ligand dissociation dynamics, complicate spectral interpretation. Complementary FTICR free such features. identities supra/nanoclusters generated from precursors have not been conclusively established but mostly coordinatively unsaturated. Density functional orbital calculations identified possible structures comparatively simple electronically unsaturated system, [Ru3(CO)6]−, that provides a clue to aggregation mechanism.