Electronic isomers in [(CO2)nROH]− cluster anions. I. Photoelectron spectroscopy

摘要: Photoelectron spectra of [(CO2)n−1ROH]− (R=H and CH3) with 2⩽n⩽7 have been measured at a photon energy 4.66 eV. Analysis the photoelectron band envelopes has revealed that [(CO2)n−1H2O]− 3⩽n⩽5 consist two components. The maximum each component corresponds to vertical detachment (VDE) relevant anionic species. In spectrum VDE values for components differ by ≈1 For example, [(CO2)4H2O]− is characterized 2.63±0.04 3.71±0.06 eV. From difference, we conclude observed arise from isomers having different electronic structures, these “electronic isomers” can be designated as C2O4−⋅H2O(CO2)n−3 CO2−⋅H2O(CO2)n−2. Coexistence occurs also in [(CO2)n−1CH3OH]−, but only n=3. [(CO2)n−1CH3OH]− anions n≠3 display composed single broad band, which photodetachment CO2−⋅CH3OH(CO2)n−2 struct...