Unusual Photofragmentation Dynamics in the Multiphoton Ionization of Cr(CO)6/Methanol van der Waals Heteroclusters
STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
Pagination or Media Count:
Mixed van der clusters containing CrCO6 and methanol a regenerated in the free-jet expansion of pulsed beam of seeded helium and subjected to 248- nm multiphoton ionization MPI, and the product ions are analyzed by time-of- flight mass spectrometry. We find that the multiphoton dissociation and ionization dynamics of solvated CrCO6 are strikingly different from those of the naked molecule. Two principle sequences of heterocluster ions are identified in the mass spectrum a minor sequence with the empirical formula, SnCrCOx x 5,6, where S is a methanol molecule, and a major sequence with the empirical formula, SnCrCOx x 0,1,2. Photoionization of solvated CrCO6 is thought to give rise to nascent photions, SnCrCO6, which may subsequently predissociate to SnCrCO5 on a timescale comparable to the residence time in the ion source, and accounts for the minor sequence.
- Physical Chemistry