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MO: Molekülphysik

MO 2: Spektroskopie I

MO 2.3: Vortrag

Montag, 3. April 2000, 17:00–17:15, HS VIII

Spectroscopic and theoretical characterization of linear centro-symmetric N₂-H⁺-N₂ and N₂-Ar⁺-N₂ — •Harold Linnartz¹, Dorin Verdes¹, John P. Maier¹, Peter Botschwina², Rainer Oswald², Pavel Rosmus³, and Peter Knowles⁴ — ¹Institute for Physical Chemistry, Klingelbergstrasse 80, CH-4056 Basel — ²Institut für Physikalische Chemie, Tammannstrasse 6, D-37077 Göttingen — ³Theoretical Chemistry Group, Marne-la-Vallée, F-77454 Champs sur Marne — ⁴School of Chemistry, University of Birmingham, B15 2TT Birmingham

The first high resolution infrared spectra of the ionic complexes N₂-H⁺-N₂ (and deuterated derivative N₂-D⁺-N₂⁺ [1]) and N₂-Ar⁺-N₂ are reported. The spectra are obtained in direct absorption in a supersonic slit nozzle plasma, employing electron impact ionization and production modulation. The observed transitions are assigned to the anti-symmetric NN stretching vibration. The spectra are consistent with a linear centro-symmetric structure. The assignment is supported by ab initio calculations that provide additional information currently not accessible to the experiment.

[1] J. Chem. Phys. 111, 8400 (1999)