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Issue 2, 2010
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Slow photoelectron velocity-map imaging of the CnH (n = 5–9) anions

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High-resolution photoelectron spectra of the CnH anions with n = 5–9 are acquired with slow electron velocity-map imaging (SEVI). Spectral features are assigned with the help of electronic structure calculations and Franck–Condon simulations. Well-resolved transitions to the linear [X with combining tilde]2Π and ã4Σ neutral states are observed for species with an odd number of carbon atoms. For C6H and C8H, transitions to the [X with combining tilde]2Π neutral ground state and the low lying Ã2Σ+ excited state are observed. Precise electron affinities, term energies, fine structure splittings, and gas-phase vibrational frequencies are determined. The C5H, C7H and C9H SEVI spectra are consistent with the anions having [X with combining tilde]3Σ linear triplet ground states.

Graphical abstract: Slow photoelectron velocity-map imaging of the CnH− (n = 5–9) anions

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Article information

03 Feb 2010
22 Feb 2010
First published
25 May 2010

Chem. Sci., 2010,1, 192-201
Article type
Edge Article

Slow photoelectron velocity-map imaging of the CnH (n = 5–9) anions

E. Garand, T. I. Yacovitch, J. Zhou, S. M. Sheehan and D. M. Neumark, Chem. Sci., 2010, 1, 192
DOI: 10.1039/C0SC00164C

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