New Infrared Spectra of Acetylene-Water Dimers: First Determination of the A Rotational Constant and Another K -Dependent Anomaly
Infrared spectra of acetylene-water complexes are studied in the regions of the H O ν bend (1600 cm ) and the D O ν /ν stretches (2670-2808 cm ), using tunable infrared sources to probe a pulsed supersonic slit jet expansion. In the H O bend region, there is a puzzling absence of = 0 transitions for...
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| Veröffentlicht in: | The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2024-09, Vol.128 (36), p.7628-7633 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Infrared spectra of acetylene-water complexes are studied in the regions of the H
O ν
bend (1600 cm
) and the D
O ν
/ν
stretches (2670-2808 cm
), using tunable infrared sources to probe a pulsed supersonic slit jet expansion. In the H
O bend region, there is a puzzling absence of
= 0 transitions for C
H
-H
O, while both
= 0 and 1 are observed for C
D
-H
O. This continues a pattern of "missing"
states noted in previous infrared studies of acetylene-water. Noticeable line broadening gives estimates of upper state predissociation lifetimes of about 1.6 ns for C
D
-H
O with
= 1, 0.8 ns for C
H
-H
O with
= 1, and 0.8 ns for C
D
-H
O with
= 0. The lifetime for C
H
-H
O
= 0 must be much shorter ( |
|---|---|
| ISSN: | 1089-5639 1520-5215 1520-5215 |
| DOI: | 10.1021/acs.jpca.4c04599 |