Table 1
For doubly ionized PAH cations, 
, values of the theoretical adiabatic ionization potentials, IP2+, and measuredappearance energies, AE2+.
| Formula | IP2+ [eV] | AE2+ [eV] | AE3+ [eV] |
|---|---|---|---|
 |
9.66(a) | 10.2 ± 0.1 | 14.1 ± 0.2 |
 |
9.82(a) | 10.0 ± 0.1 | 13.9 ± 0.2 |
 |
9.94(b) | 10.0 ± 0.1 | 13.9 ± 0.2 |
 |
8.84(a) | 9.1 ± 0.2 | −(c) |
Notes. We also list here our recorded AE3+ as obtained from the ionization of 
.
(a) Taken from Malloci et al. (2007a). (b) Calculated for this work according to Malloci et al. (2007b). (c)Trication peak out of mass range.
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