title: Photoelectron imaging of large anionic methanol clusters: (MeOH)n - (n approximately 70-460).
abstract: Electron solvation in methanol anion clusters, (MeOH)(n) (-) (n approximately 70-460), is studied by photoelectron imaging. Two isomers are observed: methanol I, with vertical binding energies (VBE) ranging from 2-2.5 eV, and methanol II, with much lower VBE's between 0.2 and 0.5 eV. The VBE's of the two isomers depend linearly on n(-1/3) with nearly identical slopes. We propose that the excess electron is internally solvated in methanol I clusters, whereas in methanol II it resides in a dipole-bound surface-state. Evidence of an excited state accessible at 1.55 eV is observed for methanol I.
authors.affiliation: Department of Chemistry, University of California, Berkeley, CA 94720, USA.
authors.forename: Aster
authors.initials: A
authors.lastname: Kammrath
authors.forename: Jan R R
authors.initials: JR
authors.lastname: Verlet
authors.forename: Graham B
authors.initials: GB
authors.lastname: Griffin
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Neumark
mesh_terms: D000838:Anions / Q000737:chemistry; D004583:Electrons; D007536:Isomerism; D000432:Methanol / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods; D011839:Radiation, Ionizing; D012997:Solvents / Q000737:chemistry; D013057:Spectrum Analysis / Q000379:methods; D013816:Thermodynamics
chemical_list: D000838:Anions; D012997:Solvents; D000432:Methanol