Gas-phase infrared spectroscopy on the lowest triplet state of the 
pyrazine–argon complex

Remmers, Karen; Satink, Rob G.; von Helden, Gert; Piest, Hans; Meijer, Gerard; Meerts, W. Leo

doi:10.1016/S0009-2614(99)01387-1

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Gas-phase infrared spectroscopy on the lowest triplet state of the pyrazine–argon complex

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Remmers, K., Satink, R. G., von Helden, G., Piest, H., Meijer, G., & Meerts, W. L. (2000). Gas-phase infrared spectroscopy on the lowest triplet state of the pyrazine–argon complex. Chemical Physics Letters, 317(3-5), 197-202. doi:10.1016/S0009-2614(99)01387-1.

Cite as: https://hdl.handle.net/21.11116/0000-000B-65DC-C

Abstract

The infrared (IR) absorption spectrum of the jet-cooled pyrazine–argon Van der Waals complex in its lowest triplet state is measured. Vibrational excitation of the laser-prepared triplet state by IR absorption causes dissociation of the complex, which is monitored via the depletion of the pyrazine–argon ion signal. A total of 10 vibrational transitions are detected in the 500–1500 cm⁻¹ region. Comparison of these data with ab initio calculations might help to elucidate the nature of the distortion of the lowest triplet state by other electronically excited states.