Multiple-collision induced dissociation of trapped silver clusters Agn+ (2⩽n⩽25)

Abstract

The dissociation energies of singly charged silver cluster cations, Agn+ (2⩽n⩽25), are determined by multiple-collision induced dissociation (MCID) in a Penning trap. The fragment yield is analyzed in terms of a linearized impulsive collision theory for the energy transfer in the multicollisional process and the delayed decay as predicted by the Rice–Ramsperger–Kassel (RRK) model. Previous photofragmentation experiments performed in the size range (9⩽n⩽21) are found to be in good agreement with the present results. Theoretical predictions agree for most clusters sizes.

Photodissociation of small group-11 metal cluster ions: Fragmentation pathways and photoabsorption cross sections

“…However, single-photon absorption is in all cases insufficient to induce sequential decays. From [6,13,14,29,31,35] it can be deduced that absorption of more than one photon of the present energies would in most cases induce sequential decay, which is not observed (see e.g., Figure 4). Additionally, in none of the present cases any significant signal of cluster sizes smaller than n-2 was detected.…”

“…From previous measurements [6,13,14,29,31,35] it is known that for most of the cluster ions under study, a single photon of ϭ 355 nm resp. ϭ 266 nm wavelength is sufficient to induce a decay on the time scale of the experiment.…”

Validation of Methods for Computational Catalyst Design: Geometries, Structures, and Energies of Neutral and Charged Silver Clusters

“…The fragmentation channels of singly charged cationic silver clusters have also The Journal of Physical Chemistry C Article been studied. 10,11 In the case of Ag n + (n = 2−7) clusters, a single fragmentation channel is found almost exclusively for each cluster: even-numbered clusters decay by emission of a silver monomer, while odd-numbered clusters decay by emission of a silver dimer. Therefore, we can consider the dissociation energies are exclusively monomer-loss reaction energies for even-numbered clusters (Ag n + → Ag + Ag n−1 + , n = even number) and dimer-loss reaction energies for oddnumbered clusters (Ag n + → Ag 2 + Ag n−2 + , n = odd number).…”

“…We performed a systematic search for these cluster sizes to find not only the lowest-energy isomers but also all possible isomers, and then we tested which of the xc functionals are able to predict the lowest-energy isomers correctly. (3) Experimental values are available for dissociation energies of Ag n + and Ag n − (n = 2−7), 11,12 vertical ionization potentials of Ag 1−7 , 13 and vertical detachment energies of Ag 1−7…”

“…A multiple-collision induced dissociation (MCID) experiment was carried out for cationic silver clusters, 11 and further analysis of the experimental data generated the dissociation energies of singly charged cationic silver clusters Ag n + . The fragmentation channels of singly charged cationic silver clusters have also The Journal of Physical Chemistry C Article been studied.…”