Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 136, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3678011
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Funding
- EPFL
- Swiss National Science Foundation (NSF(CH)) [200020-119789]
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- European Community [226716]
- Swiss National Science Foundation (SNF) [200020-119789] Funding Source: Swiss National Science Foundation (SNF)
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High resolution IR spectra of aniline, styrene, and 1,1-diphenylethylene cations embedded in superfluid helium nanodroplets have been recorded in the 300-1700 cm(-1) range using a free-electron laser as radiation source. Comparison of the spectra with available gas phase data reveals that the helium environment induces no significant matrix shift nor leads to an observable line broadening of the resonances. In addition, the IR spectra have provided new and improved vibrational transition frequencies for the cations investigated, as well as for neutral aniline and styrene. Indications have been found that the ions desolvate from the droplets after excitation by a non-evaporative process in which they are ejected from the helium droplets. The kinetic energy of the ejected ions is found to be ion specific and to depend only weakly on the excitation energy. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3678011]
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