Abstract
Measurement of the 3Π-3Π transition of C6H+ in the gas phase near 19486 cm−1 is reported. The experiment was carried out with a supersonic slit-jet expansion discharge using cavity ringdown absorption spectroscopy. Partly resolved P lines and observation of band heads permitted a rotational contour fit. Spectroscopic constants in the ground and excited-state were determined. The density of ions being sampled is merely 2×108 cm−3. Broadening of the spectral lines indicates the excited-state lifetime to be ≈100 ps. The electronic transition of HC6H +2 at 26402 cm−1 assumed to be 1A1-X1A1 in C2v symmetry could not be rotationally resolved.
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Published online January 22, 2010
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Raghunandan, R., Mazzotti, F.J. & Maier, J.P. Electronic spectra of C6H+ and C6H +3 in the gas phase. J Am Soc Mass Spectrom 21, 694–697 (2010). https://doi.org/10.1016/j.jasms.2010.01.005
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DOI: https://doi.org/10.1016/j.jasms.2010.01.005