Competitive fragmentation and electron loss kinetics of photoactivated silver cluster anions: Dissociation energies of Agn− (n=7–11)

Abstract

The photodecomposition kinetics of silver cluster anions, Agn− (n=7–11), has been investigated. The time-resolved intensities of Agn− parent ions and Agn−1− and Agn−2− photofragment product ions are measured following excitation with visible laser radiation, 415–750 nm. The atom-loss and dimer-loss product yields and reactant cluster ion depletion are compared to elucidate the decomposition kinetics of photoexcited silver cluster anions, including electron loss channels. Both prompt, direct electron photodetachment and delayed, statistical electron emission are observed in competition with cluster fragmentation product channels for some clusters. Dissociation threshold energies are determined by fitting the measured time profiles for fragmentation products using a statistical unimolecular dissociation model. The photodissociation lifetime method for measuring cluster dissociation energies is compared with previous energy-resolved collision-induced dissociation experiments on silver cluster anions.

The Electronic Properties of the Silver Clusters in Gas Phase and Water

“…AEA2 experimental [37], [80] [61,63]. AEA2 experimental [37], [80] Introduced the electronic correlation effects with PBE functional and the relativistic effects SDD has been obtained, for the adiabatic electronic affinitie, value very nears of the experimental data reported in [62][63][64]48] for n Ag (n=1-4) (see Fig. 44 and 45).…”

Electron binding energies from collisional activation of metal-cluster dianions

“…18 Top: Dissociation energies of silver cluster cations as deduced from time-resolved photofragmentation [49,65] and CID [31]. Bottom: Dissociation energies of silver cluster anions as deduced from time-resolved photofragmentation [66] and CID [67] (filled symbols). The dissociation energies indicated by the empty symbols are extrapolated from the corresponding data in the top panel using (19) experimental conditions are comparable.…”

Size‐Dependent Binding Energies of Methane to Small Gold Clusters

“…The "tight" transition state is usually associated with rearrangement processes and clearly gives a lower limit for the binding energy. [32] In this model, the vibrational frequencies are the same as for the energized molecule minus the Au x + ÀCH 4 vibration that is treated as internal translation along the reaction coordinate.…”