Photoelectron–photofragment coincidence studies of the dissociative photodetachment of O4−

Photodetachment, photofragmentation, and fragment autodetachment of [O2n(H2O)m]− clusters: Core-anion structures and fragment energy partitioning

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] The above cluster types have been studied extensively using a variety of experimental techniques, including mass spectrometry, 16 photofragment action, and translational spectroscopy, 3,5,8 as well as photoelectron spectroscopy. 2,6,9,11,12 Most studies have focused either on the oxygen clusters, O 2n − , 2,3,6-11 or hydrated superoxide, O 2 − ͑H 2 O͒ m . 4,5,12 The experiments on O 2n − have demonstrated the formation of O 4 − , which has been invoked as a core anion representing a structurally distinct species within these clusters.…”

“…22 The photoelectron and fragmentation spectra of O 2n − have similarly been measured 2,6-11 with a particular focus on the photochemistry of O 4 − . [6][7][8][9]11 DeLuca et al 2 2 The O 4 − ion has served as a model system for studying photodissociation dynamics. [6][7][8][9]11 Translational spectroscopy showed that fragments are produced with both high and low internal energies, with a complicated wavelength dependence of translational energy release.…”

Dissociative Photodetachment Studies of Transient Molecules by Coincidence Techniques

“…The predicted (uncorrelated) 02 product vibrational-state distributions for DPD of 04 to 02 + 02 + e-are reported in Ref. 41. The sensitivity of the simulation to changes in the 02 moiety bond lengths has been previously shown: for example, a reduction of the bond lengths to 1.26 A doubles the (0, 0) peak.…”

Four-Body Reaction Dynamics: Complete Correlated Fragment Measurement of the Dissociative Photodetachment Dynamics ofO8−

“…The correlation spectra for both O 2 4 and O 2 6 revealed diagonal ridges which correspond to DPD on vibrationally adiabatic repulsive curves correlating to different vibrational states of the O 2 products [13,14]. In the case of O 2 6 , however, these ridges were broader and less prominent due to the presence of the third O 2 .…”

“…Previous experimental investigations on the homogeneous cluster ions ͑O 2 ͒ 2 n include mass spectroscopy [8], photoelectron spectroscopy [9][10][11], matrix isolation [12], and PPC spectroscopy [13][14][15] show that the third O 2 molecule essentially acts as a spectator to an O 2 4 core with remarkably similar dynamics to those seen in the DPD of O 2 4 [15]. The PPC spectrometer employed for these studies has been described in detail elsewhere and will only be briefly reviewed here [17].…”