Infrared spectra of (CO)-Rg trimers, Rg = Ne, Ar, Kr, and Xe
arXiv:2207.03042 · doi:10.1016/j.jms.2022.111673
Abstract
High resolution spectra of (CO)-Rg trimers (Rg = Ne, Ar, Kr, and Xe) in the region of the CO2 nu3 fundamental (~2350 cm) are reported, using a tunable OPO laser source to probe a pulsed supersonic slit jet expansion. These (CO)-Rg transitions tend to be hidden among stronger spectra due to other species, such as CO-Rg and (CO). Each trimer consists of a (CO) unit which is similar to the free carbon dioxide dimer (planar parallel staggered) plus an Rg atom located out-of-plane on the dimer C symmetry axis, but the (CO) unit may not remain exactly planar in the dimer. Experimental structures show that the C-Rg bond lengths in the trimers are similar to those in the corresponding CO-Rg dimers. As well, the vibrational band origin shifts, relative to (CO) itself, are similar to those of CO-Rg relative to CO.
14 pages, 4 figures and 3 tables
References in corpus (3)
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