Photoelectron imaging of large anionic methanol clusters: (MeOH)n - (n approximately 70-460).
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.
Kammrath
Aster
A
Department of Chemistry, University of California, Berkeley, CA 94720, USA.
Verlet
Jan R R
JR
Griffin
Graham B
GB
Neumark
Daniel M
DM
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
D000838:Anions; D012997:Solvents; D000432:Methanol