| Alternative title | Spectra of CO2–N2 dimer in the 4.2 μm region: symmetry breaking of the intramolecular CO2 bend, the intermolecular bend, and higher K-values for the fundamental |
|---|
| Download | - View final version: Spectra of CO₂–N₂ dimer in the 4.2 μm region: symmetry breaking of the intramolecular CO₂ bend, the intermolecular bend, and higher K-values for the fundamental (PDF, 1.5 MiB)
- View author's version: Spectra of CO₂–N₂ dimer in the 4.2 μm region: symmetry breaking of the intramolecular CO₂ bend, the intermolecular bend, and higher K-values for the fundamental (PDF, 503 KiB)
- View supplementary information: Spectra of CO₂–N₂ dimer in the 4.2 μm region: symmetry breaking of the intramolecular CO₂ bend, the intermolecular bend, and higher K-values for the fundamental (TXT, 25 KiB)
|
|---|
| DOI | Resolve DOI: https://doi.org/10.1063/5.0012531 |
|---|
| Author | Search for: Barclay, A. J.; Search for: McKellar, A. R. W.1ORCID identifier: https://orcid.org/0000-0001-5409-2690; Search for: Moazzen-Ahmadi, N.ORCID identifier: https://orcid.org/0000-0001-8307-3480 |
|---|
| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
|
|---|
| Format | Text, Article |
|---|
| Abstract | Infrared spectra of the CO₂–N₂ dimer are observed in the carbon dioxide ν₃ asymmetric stretch region (≈2350 cm⁻¹) using a tunable infrared optical parametric oscillator to probe a pulsed slit jet supersonic expansion. Previous results for the b-type fundamental band are extended to higher values of Kₐ. An a-type combination band involving the lowest in-plane intermolecular bending mode is observed. This yields a value of 21.4 cm⁻¹ and represents the first experimental determination of an intermolecular mode for CO₂–N₂. This intermolecular frequency is at odds with the value of 45.9 cm⁻¹ obtained from a recent 4D intermolecular potential energy surface. In addition, two weak bands near 2337 cm⁻¹ are assigned to the CO₂ hot band transition (v₁, v₂ˡ², v₃) = (01¹1) ← (01¹0). They yield a value of 2.307 cm⁻¹ for the splitting of the degenerate CO₂ ν₂ bend into in-plane and out-of-plane components due to the presence of the nearby N₂. The in-plane mode lies at a lower energy relative to the out-of-plane mode. |
|---|
| Publication date | 2020-07-02 |
|---|
| Publisher | AIP |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 4943cb98-d3bd-4899-9e7f-043b318f8388 |
|---|
| Record created | 2021-06-15 |
|---|
| Record modified | 2021-06-16 |
|---|
