Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 8, Issue 26, Pages 3078-3082Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b605442k
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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+(H2O) 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 H2O molecule was analyzed in terms of the vibrational frequency shifts, relative IR intensities, and H2O geometry.
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