Osnabrück 2002 – wissenschaftliches Programm

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MO: Molekülphysik

MO 1: Elektronische Übergänge

MO 1.4: Vortrag

Montag, 4. März 2002, 14:45–15:00, HS 01/E01

Rotationally Resolved A²Π_u −X²Π_g Electronic Transition of NC₆N⁺ — •Harold Linnartz, David Pfluger, Olga Vaizert, Pawel Cias, Petre Birza, Dmitriy Korhoshev, and John P. Maier — Institut für Physikalische Chemie, Klingelbergstrasse 80, CH 4056 Basel

The rotationally resolved A²Π_u − X²Π_g electronic origin band spectrum of dicyano-diacetylene cation, NC₆N⁺, has been recorded in the gas phase, using frequency-production double modulation spectroscopy in a liquid nitrogen cooled hollow cathode discharge and cavity ring down spectroscopy in a supersonic plasma. These techniques yield spectra with significantly different rotational profiles. The analysis of the complementary results provides accurate molecular parameters for the the two spin-orbit components in both electronic states. The results are compared with results of density functional theory calculations and the spectroscopic parameters available for the iso-electronic chains HC₇N⁺ and HC₈H⁺.