Infrared spectra of (CO$_2$)$_2$-Rg trimers, Rg = Ne, Ar, Kr, and Xe

A. J. Barclay; A. R. W. McKellar; N. Moazzen-Ahmadi

doi:10.1016/j.jms.2022.111673

paper

Infrared spectra of (CO $_{2}$ ) $_{2}$ -Rg trimers, Rg = Ne, Ar, Kr, and Xe

arXiv:2207.03042 · doi:10.1016/j.jms.2022.111673

Abstract

High resolution spectra of (CO $_{2}$ ) $_{2}$ -Rg trimers (Rg = Ne, Ar, Kr, and Xe) in the region of the CO2 nu3 fundamental (~2350 cm $^{- 1}$ ) are reported, using a tunable OPO laser source to probe a pulsed supersonic slit jet expansion. These (CO $_{2}$ ) $_{2}$ -Rg transitions tend to be hidden among stronger spectra due to other species, such as CO $_{2}$ -Rg and (CO $_{2}$ ) $_{2}$ . Each trimer consists of a (CO $_{2}$ ) $_{2}$ 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 $_{2}$ symmetry axis, but the (CO $_{2}$ ) $_{2}$ 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 $_{2}$ -Rg dimers. As well, the vibrational band origin shifts, relative to (CO $_{2}$ ) $_{2}$ itself, are similar to those of CO $_{2}$ -Rg relative to CO $_{2}$ .

14 pages, 4 figures and 3 tables

References in corpus (1)

Weakly-bound clusters of atmospheric molecules: infrared spectra and structural calculations of (CO $_{2}$ ) $_{n}$ -(CO) $_{m}$ -(N $_{2}$ ) $_{p}$ , $(n, m, p)$ = (2, 1, 0), (2, 0, 1), (1, 2, 0), (1, 0, 2), (1, 1, 1), (1, 3, 0), (1, 0, 3), (1, 2, 1), (1, 1, 2)

Cited by in corpus (1)

Doped rare gas clusters up to completion of first solvation shell, CO2-(Rg)n, n = 3-17, Rg = Ar, Kr, Xe

Infrared spectra of (CO2​)2​-Rg trimers, Rg = Ne, Ar, Kr, and Xe

Abstract

References in corpus (1)

Cited by in corpus (1)

Infrared spectra of (CO $_{2}$ ) $_{2}$ -Rg trimers, Rg = Ne, Ar, Kr, and Xe