Identification of a Jahn-Teller active gas phase siloxy free radical (Cl3SiO) by LIF spectroscopy
Smith, Tony
Loading…
Permalink
https://hdl.handle.net/2142/97162
Description
Title
Identification of a Jahn-Teller active gas phase siloxy free radical (Cl3SiO) by LIF spectroscopy
Author(s)
Smith, Tony
Contributor(s)
Clouthier, Dennis
Issue Date
2017-06-22
Keyword(s)
Radicals
Abstract
A very strong LIF spectrum was observed in the 655 - 600 nm region from the products of an electric discharge through a dilute mixture of silicon tetrachloride and oxygen in argon. The same spectrum was obtained from a Cl$_{3}$Si-O-SiCl$_{3}$ precursor in argon. The LIF bands do not have resolved rotational structure, suggesting that the carrier of the spectrum is a heavy molecule. Emission spectra show substantial differences depending on which upper state vibronic level is probed, and these differences are readily understood if we assume that the spectrum is due to the Cl$_{3}$SiO free radical with a significant Jahn-Teller effect in the ground $^{2}$E state. This conclusion is reinforced by our own ab intio calculations of the ground and excited state vibronic energy levels, band contours, chlorine isotope effects, and electronic excitation energies. Cl$_{3}$SiO is the first siloxy radical to be detected in the gas phase.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
