| Alternative title | Infrared bands of CS2 dimer and trimer at 4.5 μm |
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| DOI | Resolve DOI: https://doi.org/10.1063/1.5091508 |
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| Author | Search for: Barclay, A. J.; Search for: Esteki, K.; Search for: Michaelian, K. H.; 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 |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Abstract | We report observation of new infrared bands of (CS₂)₂ and (CS₂)₃ in the region of the CS₂ ν1 + ν₃ combination band (at 4.5 µm) using a quantum cascade laser. The complexes are formed in a pulsed supersonic slit-jet expansion of a gas mixture of carbon disulfide in helium. We have previously shown that the most stable isomer of (CS₂)₂ is a cross-shaped structure with D₂d symmetry and that for (CS₂)₃ is a barrel-shaped structure with D₃ symmetry. The dimer has one doubly degenerate infrared-active band in the ν₁ + ν₃ region of the CS₂ monomer. This band is observed to have a rather small vibrational shift of −0.844 cm−1. We expect one parallel and one perpendicular infrared-active band for the trimer but observe two parallel bands and one perpendicular band. Much larger vibrational shifts of −8.953 cm−1 for the perpendicular band and −8.845 cm−1 and +16.681 cm−1 for the parallel bands are observed. Vibrational shifts and possible vibrational assignments, in the case of the parallel bands of the trimer, are discussed using group theoretical arguments. |
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| Publication date | 2019-04-14 |
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| Publisher | American Institute of Physics |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 2b62d7fe-35b5-42ff-9cda-b8f3f3082d70 |
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| Record created | 2021-03-18 |
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| Record modified | 2021-03-18 |
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