Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution
We use the liquid microjet technique coupled with laser spectroscopy to measure the rotational and vibrational energy content of benzene spontaneously evaporating from a water-ethanol solution. We find different temperatures for rotation (206 K) and for the two low-lying vibrational modes, nu(6) (25...
| Main Authors: | , , , |
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| Format: | Journal Article |
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American Chemical Society
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/11470 |
| _version_ | 1848747814572523520 |
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| author | Maselli, O. Gascooke, J. Lawrance, W. Buntine, Mark |
| author_facet | Maselli, O. Gascooke, J. Lawrance, W. Buntine, Mark |
| author_sort | Maselli, O. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We use the liquid microjet technique coupled with laser spectroscopy to measure the rotational and vibrational energy content of benzene spontaneously evaporating from a water-ethanol solution. We find different temperatures for rotation (206 K) and for the two low-lying vibrational modes, nu(6) (256 K) and nu(16) (229 K). Collision-induced energy-transfer measurements reveal efficient rotational relaxation, from which we deduce that the rotational temperature indicates the translational energy of the evaporate. Conversely, the relaxation of nu(6) is very inefficient, suggesting that the nu(6) temperature indicates the surface temperature of the liquid. Modeling the relaxation of nu(16) indicates that > 10(2) collisions are occurring during the transition from liquid to vacuum, which is an order of magnitude more than has been reported to occur in the gas phase immediately above the liquid surface. Our results reveal that evaporative molecular energy transfer involves many collisions, resulting in moderate collisional cooling as molecules pass from liquid to vapor. |
| first_indexed | 2025-11-14T06:55:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-11470 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:55:08Z |
| publishDate | 2009 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-114702017-02-28T01:33:32Z Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution Maselli, O. Gascooke, J. Lawrance, W. Buntine, Mark SURFACE X-RAY SPECTROSCOPY ROTATIONAL ANALYSIS JET-COOLED BENZENE LASER-DESORPTION GAS MOLECULAR-DYNAMICS SIMULATION LIQUID-VAPOR INTERFACE KINETIC BOUNDARY-CONDITION BEAM We use the liquid microjet technique coupled with laser spectroscopy to measure the rotational and vibrational energy content of benzene spontaneously evaporating from a water-ethanol solution. We find different temperatures for rotation (206 K) and for the two low-lying vibrational modes, nu(6) (256 K) and nu(16) (229 K). Collision-induced energy-transfer measurements reveal efficient rotational relaxation, from which we deduce that the rotational temperature indicates the translational energy of the evaporate. Conversely, the relaxation of nu(6) is very inefficient, suggesting that the nu(6) temperature indicates the surface temperature of the liquid. Modeling the relaxation of nu(16) indicates that > 10(2) collisions are occurring during the transition from liquid to vacuum, which is an order of magnitude more than has been reported to occur in the gas phase immediately above the liquid surface. Our results reveal that evaporative molecular energy transfer involves many collisions, resulting in moderate collisional cooling as molecules pass from liquid to vapor. 2009 Journal Article http://hdl.handle.net/20.500.11937/11470 American Chemical Society restricted |
| spellingShingle | SURFACE X-RAY SPECTROSCOPY ROTATIONAL ANALYSIS JET-COOLED BENZENE LASER-DESORPTION GAS MOLECULAR-DYNAMICS SIMULATION LIQUID-VAPOR INTERFACE KINETIC BOUNDARY-CONDITION BEAM Maselli, O. Gascooke, J. Lawrance, W. Buntine, Mark Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution |
| title | Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution |
| title_full | Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution |
| title_fullStr | Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution |
| title_full_unstemmed | Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution |
| title_short | Benzene Internal Energy Distributions Following Spontaneous Evaporation from a Water-Ethanol Solution |
| title_sort | benzene internal energy distributions following spontaneous evaporation from a water-ethanol solution |
| topic | SURFACE X-RAY SPECTROSCOPY ROTATIONAL ANALYSIS JET-COOLED BENZENE LASER-DESORPTION GAS MOLECULAR-DYNAMICS SIMULATION LIQUID-VAPOR INTERFACE KINETIC BOUNDARY-CONDITION BEAM |
| url | http://hdl.handle.net/20.500.11937/11470 |