Time-resolved dynamics in acetonitrile cluster anions
نویسندگان
چکیده
Excited state dynamics of acetonitrile cluster anions, ðCH3CNÞ n , were investigated using time-resolved photoelectron imaging (TRPEI) for 20 6 n 6 50. The clusters were excited and then photodetached with femtosecond pump and probe pulses at 790 and 395 nm, respectively. Excited state lifetimes varied between 200 and 270 fs over this size range, showing no obvious size trend. Experimental evidence indicates that we are exciting ‘isomer II’ clusters in which the excess electron is valence-bound to a solvated anionic dimer core. The absence of an obvious size-dependence in the excited state lifetimes is consistent with such a structure. 2009 Elsevier B.V. All rights reserved.
منابع مشابه
Decay dynamics of nascent acetonitrile and nitromethane dipole-bound anions produced by intracluster charge-transfer.
Decay dynamics of nascent dipole bound states of acetonitrile and nitromethane are examined using time-resolved photoelectron imaging of iodide-acetonitrile (I(-)·CH3CN) and iodide-nitromethane (I(-)·CH3NO2) complexes. Dipole-bound anions are created by UV-initiated electron transfer to the molecule of interest from the associated iodide ion at energies just below the vertical detachment energy...
متن کاملUltrafast solvent dynamics: Connection between time resolved fluorescence and optical Kerr measurements
Articles you may be interested in Advances in ultrafast time resolved fluorescence physics for cancer detection in optical biopsy Polar solvation dynamics of coumarin 153 by ultrafast time-resolved fluorescence Orientational and interaction induced dynamics in the isotropic phase of a liquid crystal: Polarization resolved ultrafast optical Kerr effect spectroscopy The effects of anion and catio...
متن کاملPaper Dynamics of cluster anions: a detailed look at condensed-phase interactions
This Perspective reflects on several recent advances in the studies of structure and dynamics of cluster anions, bridging the gap between ‘cluster’ and condensed phases. Applications involving photofragment and photodetachment spectroscopy, as well as femtosecond time-resolved experiments, are described. Special emphasis is given to the effects of microscopic solvation on the electronic structu...
متن کاملElectron solvation in water clusters following charge transfer from iodide.
The dynamics following charge transfer to solvent from iodide to a water cluster are studied using time-resolved photoelectron imaging of I-(H2O)n and I-(D2O)n clusters with n< or =28. The results show spontaneous conversion, on a time scale of approximately 1 ps, from water cluster anions with surface-bound electrons to structures in which the excess electron is more strongly bound and possibl...
متن کاملINVITED TOPICAL REVIEW Spectroscopy and dynamics of excess electrons in clusters
Anionic clusters comprising solvent molecules and excess electrons can provide new insights into electron solvation in liquids, an intrinsically bulk phenomenon. This paper reviews experimental and theoretical studies of this class of clusters, focusing primarily on water cluster anions, ðH2OÞ n , but also on iodide-water clusters, I (H2O)n, and methanol cluster anions ðCH3OHÞ n . Issues of par...
متن کامل