Casassa, Michael P. and Bomse, David S. and Beauchamp, J. L. and Janda, Kenneth C.
(1980)
Infrared photochemistry of ethylene clusters.
Journal of Chemical Physics, 72
(12).
pp. 6805-6806.
ISSN 0021-9606.
doi:10.1063/1.439174.
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Abstract
Infrared irradiation of ethylene clusters formed in supersonic molecular beams, using a low power cw CO2 laser, results in the photodissociation of a large fraction of the van der Waals molecules. Under such conditions, infrared absorption intensity exhibits first-order power dependence and is readily detected as loss in molecular beam intensity. Intramolecular energy transfer rates, determined by measuring spectral linewidths, are shown to vary with the vibrational mode initially excited. Ethylene clusters containing one quantum of vibrational energy corresponding to the nun7 fundamental in the monomer (949 cm^–1) have a vibrationally predissociative lifetime of 0.33 psec. In comparison, the relaxation rate of ethylene-d4 clusters with one quantum of excitation corresponding to the nu12 (1078 cm^–1) mode of C2D4 is 0.7 psec.
| Item Type: | Article |
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| Additional Information: | © 1980 American Institute of Physics.
(Received 26 March 1980; accepted 15 April 1980)
This work was supported by the Research Corporation and the Division of Chemical Sciences, Office of Basic Energy Sciences, U.S. Department of Energy under contract No. DE-AS03-76SF00767. Acknowledgment is made to the Donors of the Petroleum Research Fund, administered by the American Chemical Society, for partial support of this research.
[M.P.C. was a] National Science Foundation Predoctoral Fellow.
[D.S.B. was a] Josephine de Karman Fellow and Monsanto Fellow.
Division of Chemistry and Chemical Engineering, Contribution number 6183. |
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| Funders: | | Funding Agency | Grant Number |
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| Research Corporation | UNSPECIFIED | | Department of Energy (DOE) | DE-AS03-76SF00767 | | American Chemical Society Petroleum Research Fund | UNSPECIFIED | | NSF Predoctoral Fellowship | UNSPECIFIED | | Monsanto Corporation | UNSPECIFIED |
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| Subject Keywords: | VIBRATIONAL STATES, RELAXATION, INFRARED RADIATION, LASER RADIATION, PHOTOCHEMICAL REACTIONS, ETHYLENE, MOLECULAR BEAMS, CROSS SECTIONS |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Caltech Division of Chemistry and Chemical Engineering | 6183 |
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| Issue or Number: | 12 |
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| DOI: | 10.1063/1.439174 |
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| Record Number: | CaltechAUTHORS:CASjcp80 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:CASjcp80 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 10795 |
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| Collection: | CaltechAUTHORS |
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| Deposited On: | 11 Jun 2008 |
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| Last Modified: | 08 Nov 2021 21:11 |
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