Zero-kinetic-energy (ZEKE) photoelectron spectroscopy of the hydrogen-bonded phenol–methanol complex

摘要: The two-colour, two-photon (1 + 1′) resonance-enhanced multiphoton ionisation (REMPI) spectrum of the S1 state hydrogen-bonded phenol–methanol complex has been recorded. region around origin is in good agreement with previously reported spectra. In this work, further discussion presented and all observed spectral features are attributed to intermolecular vibrations (and combinations) a single conformal isomer. Additionally, bands have higher energy assigned intramolecular (phenol-localised) modes combination vibrations.Zero-kinetic-energy (ZEKE) photoelectron spectra recorded using different intermediate vibrational levels state. via vibrationless level shows beautiful structure indicates substantial change geometry on ionisation. dominated by progressions low-frequency bending vibration (34 cm–1) other vibrations. particular, stretch (278 demonstrates progression, each component which mode. Excitation intermediate, vibronic states also gives rise structured these lead assignment six frequencies cation. contrast, excitation phenol ν6a featureless spectrum. It proposed that latter observation due rapid relaxation (IVR) lowest band ZEKE exciting level, two vibrations, cases allowed (field-corrected) adiabatic 63 207 ± 4 cm–1(7.8367 0.0005 eV) be derived.