The dynamics of an excess electron in size-selected methanol clusters is studied via pump-probe spectroscopy with resolution of ∼120 fs. Following excitation, the excess electron undergoes internal conversion back to the ground state with lifetimes of 260-175 fs in (C H3 OH) n- (n=145-535) and 280-230 fs in (C D3 OD) n- (n=210-390), decreasing with increasing cluster size. The clusters then undergo vibrational relaxation on the ground state on a time scale of 760±250 fs. The excited state lifetimes for (C H3 OH) n- clusters extrapolate to a value of 157±25 fs in the limit of infinite cluster size.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry