THE NEGATIVE-ION PHOTOELECTRON (PHOTODETACHMENT) SPECTRA OF NO-(H2O)N=1,2

We have recorded the negative ion photoelectron spectra of NO- (H2O)n = 1.2 and NO- (D2O)1 using 2.540 eV photons. Vertical detachment energies, adiabatic electron affinities, and anion-single solvent dissociation (sequential solvation) energies were determined from these spectra. For NO- (H2O)1 and NO- (H2O)2, the ion-solvent dissociation energies for the loss of single water molecules were found to be 0.72 and 0.68 eV, respectively. This system is discussed in relation both to other hydrated-anion complexes and to other NO- complexes.