Electronic Spectra of MgC2nH (n=1-3) Chains in the Gas Phase

Details Electronic Spectra of MgC2nH (n=1-3) Chains in the Gas Phase Electronic Spectra of MgC2nH (n=1-3) Chains in the Gas Phase

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...677..348d&link_type=abstract

The Astrophysical Journal, Volume 677, Issue 1, pp. 348-352.

Astronomy and Astrophysics

Astronomy

4

Ism: General, Ism: Lines And Bands, Ism: Molecules, Molecular Data

Scientific paper

Electronic transitions of MgC2nH (n=1-3) have been observed in the gas phase in the visible region. A mass-selective, resonant two-color two-photon ionization technique, coupled with a laser ablation source, was used. Ab initio calculations of the geometries, energies, and vertical electronic excitations have been carried out using hybrid density functional theory and the coupled-cluster approach. The spectra are assigned as the A2Π<--X2Σ+ electronic transition of linear chains. The origin bands are located at 4383, 4453, and 4525 Å for MgC2H, MgC4H, and MgC6H, respectively, and provide a means of detecting such species in astronomical environments.

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