Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..confetj04h&link_type=abstract
"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec
Physics
Electronic
Scientific paper
The H_2As=O radical has been identified for the first time by laser-induced fluorescence (LIF) and single vibronic level (SVL) emission techniques. The radical was generated by a pulsed electric discharge in a mixture of AsH_3 and CO_2 and high-pressure argon and detected by observation of the tilde{B} ^2{A}^' - tilde{X} ^2{A}^' electronic transition in the 510-410 nm region.
Moderate resolution LIF and SVL emission spectra of H_2AsO, D_2AsO, and HDAsO have been recorded and analysis shows unequivocally that the spectrum is due to the arsenyl radical. High-resolution spectra of the 0_0^0 bands of H_2AsO and D_2AsO, which consist of strong a-type and weaker c-type transitions, revealed spin-splittings and small, but significant arsenic hyperfine splittings due to a Fermi contact interaction in the ground state. The effective molecular structures of H_2AsO in the ground and excited states have been determined from the rotational constants and will be discussed in the context of the analogous nitroxyl (X_2N=O) and phosphonyl (X_2P=O) radicals.
Clouthier Dennis J.
He Sheng-Gui
Sunahori Fumie X.
Yang Jie
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