Infrared multiphoton electron detachment spectroscopy of C762−

Hampe, O.; Neumaier, M.; Boese, A. D.; Lemaire, J.; Niedner-Schatteburg, G.; Kappes, M. M.

doi:doi:10.1063/1.3224130

Volume/Page
Keyword
DOI
Citation
Advanced

Volume: Page/Article:

Search Content Type

article doi:

Citation:

Metal clusters with hidden ground states: Melting and structural transitions in Al₁₁₅⁺, Al₁₁₆⁺, and Al₁₁₇⁺

Heat capacities measured as a function of temperature for Al115+, Al116+, and Al117+ show two well-resolved peaks, at around 450 and 600 K. After being annealed to 523 K (a temperature between the two peaks) or to 773 K (well above both peaks), the high temperature peak remains unchanged but the low temperature peak disappears. After considering the possible explanations, the low temperature peak is attributed to a structural transition and the high temperature peak to the melting of the higher...

Bound states of the OH(²Π)–HCl complex on ab initio diabatic potentials

The bound states of the open-shell OH(2Π)–HCl complex were calculated in four dimensions with a diabatic model using electronic states that correlate asymptotically with the ground and excited spin-orbit states of the OH(2Π) fragment and the ground state of the HCl fragment. The ab initio diabatic potentials and their analytic expansion applied in these calculations were obtained earlier by Wormer et al. [J. Chem. Phys. 122, 244325 (2005)] . In addition to the four-dimensional calculations, we...

In this letter, we report the first infrared spectrum of C762−. This multiply charged anion has been studied in an electrodynamic ion trap held at room temperature using tunable infrared radiation from a free-electron laser. Resonant vibrational excitation is found to cause electron detachment and the resulting singly negatively charged as well as the remaining doubly charged parent ion are monitored as a function of IR wavelength in an experimental scheme that we term infrared multiphoton electron detachment spectroscopy. The obtained IR spectra are contrasted to computed vibrational spectra using density functional theory. The dianionic molecule retains its overall symmetry (i.e., D₂ point group) with a ¹A₁ ground state with respect to the neutral fullerene. Spectral shifts of characteristic tangential modes relative to the neutral cage are shown to originate from the excess charge density.

Article Outline

INTRODUCTION
METHODS
RESULTS AND DISCUSSION
CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

carbon, density functional theory, electron detachment, fullerenes, ground states, infrared spectra, multiphoton processes, negative ions, particle traps, red shift, vibrational states

PACS

33.80.Rv

Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)
33.20.Ea

Infrared spectra
33.15.Mt

Rotation, vibration, and vibration-rotation constants
36.20.Ng

Vibrational and rotational structure, infrared and Raman spectra
33.80.Eh

Autoionization, photoionization, and photodetachment
33.70.Jg

Line and band widths, shapes, and shifts
31.15.E-

Density-functional theory

ARTICLE DATA

Permalink

http://link.aip.org/link/doi/10.1063/1.3224130

PUBLICATION DATA

ISSN:

0021-9606 (print)

1089-7690 (online)

Publisher:

$abstract.society.value is a Member of CrossRef

American Institute of Physics

Figures (5) Tables (2)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)