Cars spectra of van der waals complexes: The structure of the CO2 dimer

G. A. Pubanz; M. Maroncelli; J. W. Nibler

doi:10.1016/0009-2614(85)87064-0

Cars spectra of van der waals complexes: The structure of the CO₂ dimer

G. A. Pubanz, M. Maroncelli, J. W. Nibler

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

We report the first coherent Raman detection of small van der Waals aggregates formed in dilute CO₂/He free-jet expansions. CARS spectra show distinct features attributable to dimers and higher-order polymers of CO₂. Comparison of these Raman data with infrared spectra in the ν₁ region of CO₂ indicates that the rule of mutual exclusion is operative for the dimer vibrations. This result favors an offset parallel C_2h structure for the most stable dimer configuration rather than a polar T-shaped arrangement proposed from recent electric deflection experiments.

Original language	English (US)
Pages (from-to)	313-317
Number of pages	5
Journal	Chemical Physics Letters
Volume	120
Issue number	3
DOIs	https://doi.org/10.1016/0009-2614(85)87064-0
State	Published - Oct 11 1985
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/0009-2614(85)87064-0

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title = "Cars spectra of van der waals complexes: The structure of the CO2 dimer",

abstract = "We report the first coherent Raman detection of small van der Waals aggregates formed in dilute CO2/He free-jet expansions. CARS spectra show distinct features attributable to dimers and higher-order polymers of CO2. Comparison of these Raman data with infrared spectra in the ν1 region of CO2 indicates that the rule of mutual exclusion is operative for the dimer vibrations. This result favors an offset parallel C2h structure for the most stable dimer configuration rather than a polar T-shaped arrangement proposed from recent electric deflection experiments.",

author = "Pubanz, {G. A.} and M. Maroncelli and Nibler, {J. W.}",

note = "Funding Information: The authors wish to thank Professor George Ewing and Dr. Richard Kopec for permission to display the IR trace in fig. 3. We appreciate the assistance of Mr_ John Archibald and Mr. Bob Boyer in the design and construction of the cooled nozzle assembly_ Thanks are due also to Mr. Glen Hopkins for his contribution to the data collection system. This research was supported by the National Science Foundation and by the Air Force Office of Scientific Research. We are also grateful for a DOD University Research Instrumen-tational contribution toward a Nd:YAG ring dye laser system to be used for high-resolution work.",

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doi = "10.1016/0009-2614(85)87064-0",

language = "English (US)",

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T1 - Cars spectra of van der waals complexes

T2 - The structure of the CO2 dimer

AU - Pubanz, G. A.

AU - Maroncelli, M.

AU - Nibler, J. W.

N1 - Funding Information: The authors wish to thank Professor George Ewing and Dr. Richard Kopec for permission to display the IR trace in fig. 3. We appreciate the assistance of Mr_ John Archibald and Mr. Bob Boyer in the design and construction of the cooled nozzle assembly_ Thanks are due also to Mr. Glen Hopkins for his contribution to the data collection system. This research was supported by the National Science Foundation and by the Air Force Office of Scientific Research. We are also grateful for a DOD University Research Instrumen-tational contribution toward a Nd:YAG ring dye laser system to be used for high-resolution work.

PY - 1985/10/11

Y1 - 1985/10/11

N2 - We report the first coherent Raman detection of small van der Waals aggregates formed in dilute CO2/He free-jet expansions. CARS spectra show distinct features attributable to dimers and higher-order polymers of CO2. Comparison of these Raman data with infrared spectra in the ν1 region of CO2 indicates that the rule of mutual exclusion is operative for the dimer vibrations. This result favors an offset parallel C2h structure for the most stable dimer configuration rather than a polar T-shaped arrangement proposed from recent electric deflection experiments.

AB - We report the first coherent Raman detection of small van der Waals aggregates formed in dilute CO2/He free-jet expansions. CARS spectra show distinct features attributable to dimers and higher-order polymers of CO2. Comparison of these Raman data with infrared spectra in the ν1 region of CO2 indicates that the rule of mutual exclusion is operative for the dimer vibrations. This result favors an offset parallel C2h structure for the most stable dimer configuration rather than a polar T-shaped arrangement proposed from recent electric deflection experiments.

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Cars spectra of van der waals complexes: The structure of the CO₂ dimer

Abstract

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