Abstract
The 351 nm photoelectron spectra of OH−(N2O)n, n=1–5, are reported. Each spectrum is composed of a single broad feature that shifts toward higher electron binding energy as the number of solvent molecules increases. Analysis of OH−(N2O) spectra at ion temperatures of 200 and 300 K shows that there is significant intensity in the 000 transition, and that transitions to the dissociative region of the OH+N2O potential energy surface are also accessed. The electron affinity of OH(N2O) is estimated to be 2.14±0.02 eV, from which the OH–N2O bond dissociation energy is calculated as 0.39 eV. The photoelectron spectra of OH−(N2O)n>1 are accurately modeled as the convolution of the OH−(N2O) spectrum with the OH−(N2O)n−1. The anion vertical detachment energies and the adiabatic electron affinities for OH(N2O)n=2–5 are obtained and the thresholds for stepwise dissociation of N2O are located, indicating that photodetachment accesses multiple dissociation channels.
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