Time-resolved photoelectron imaging of large anionic methanol clusters: (methanol)n-(n approximately 145-535).
The dynamics of an excess electron in size-selected methanol clusters is studied via pump-probe spectroscopy with resolution of approximately 120 fs. Following excitation, the excess electron undergoes internal conversion back to the ground state with lifetimes of 260-175 fs in (CH3OH)n- (n=145-535) and 280-230 fs in (CD3OD)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 (CH3OH)n- clusters extrapolate to a value of 157+/-25 fs in the limit of infinite cluster size.
Kammrath
Aster
A
Department of Chemistry, University of California, Berkeley, California 94720, USA.
Griffin
Graham B
GB
Verlet
Jan R R
JR
Young
Ryan M
RM
Neumark
Daniel M
DM
D000537:Aluminum Oxide; D000838:Anions / Q000737:chemistry*; D002627:Chemistry, Physical / Q000379:methods*; D016000:Cluster Analysis; D004583:Electrons; D007536:Isomerism; D007700:Kinetics; D007834:Lasers; D000432:Methanol / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods; D013997:Time Factors; D014867:Water / Q000737:chemistry
D000838:Anions; D012997:Solvents; D014867:Water; D000537:Aluminum Oxide; D000432:Methanol