Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 108, Issue 1, Pages 64-68Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0309973
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A new technique is introduced for the acquisition of size-selected neutral cluster spectra on the basis of argon-mediated, population-modulated electron attachment. This method is demonstrated and used to obtain the vibrational spectrum of the neutral water hexamer precursor to the (H2O)(6)(-) cluster ion. The mid-infrared spectrum of the neutral species is dominated by four intense features above 3400 cm(-1), clearly indicating that significant structural rearrangements occur upon slow electron attachment to form the magic hexamer cluster anion. Comparison with previous spectroscopic reports and theoretical predictions indicates that the low-energy book isomer is most consistent with the observed band pattern and is suggested to be the species that captures a low-energy electron to form the hexamer anion.
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