Infrared spectroscopy of the Li+(H2O)Ar complex: the role of internal energy and its dependence on ion preparation.
The internal energy or effective temperature of cluster ions has become an important issue in characterizing the structures observed in these species. This report considers the role played by the method of ion preparation (laser vaporization-supersonic expansion versus ion impact-evaporative cooling) in governing the internal energy of a specific species, Li(+)(H(2)O)Ar. Vibrational predissociation spectroscopy of the O-H stretch modes revealed rotational features, which were used to characterize the structure and effective rotational temperature of the cluster ion. In addition, the impact of the lithium ion on the H(2)O molecule was analyzed in terms of the vibrational frequency shifts, relative IR intensities, and H(2)O geometry.
Vaden
Timothy D
TD
Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, IL 61801, USA.
Lisy
James M
JM
Carnegie
Prosser D
PD
Pillai
E Dinesh
ED
Duncan
Michael A
MA
D001128:Argon / Q000032:analysis / Q000737:chemistry*; D003198:Computer Simulation; D004735:Energy Transfer; D005740:Gases / Q000032:analysis / Q000737:chemistry*; D007477:Ions / Q000032:analysis / Q000737:chemistry*; D018020:Lithium Compounds / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D008958:Models, Molecular; D013055:Spectrophotometry, Infrared / Q000379:methods*
D005740:Gases; D007477:Ions; D018020:Lithium Compounds; D001128:Argon; C028467:lithium hydroxide