Infrared laser desorption of hydroquinone from a water-ethanol liquid beam
We have investigated the 1.9-mum IR desorption of hydroquinone in a water/ethanol liquid beam under relatively high desorption laser fluences (1316 and 2632 mJ cm(-2) pulse(-1)). The appearance of the IR desorption/UV ionization TOF mass spectrum of hydroquinone (HQ) is interpreted in terms of disso...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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American Chemical Society
2003
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| Online Access: | http://hdl.handle.net/20.500.11937/24356 |
| _version_ | 1848751405501775872 |
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| author | Otten, D. Trevitt, B. Nichols, G. Metha, G. Buntine, Mark |
| author_facet | Otten, D. Trevitt, B. Nichols, G. Metha, G. Buntine, Mark |
| author_sort | Otten, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have investigated the 1.9-mum IR desorption of hydroquinone in a water/ethanol liquid beam under relatively high desorption laser fluences (1316 and 2632 mJ cm(-2) pulse(-1)). The appearance of the IR desorption/UV ionization TOF mass spectrum of hydroquinone (HQ) is interpreted in terms of dissociation of solvated HQ clusters during the ionization event. The maximum in the hydroquinone desorption velocity distribution is 300 ms-1, and the translational temperature of the desorbed species is approximately 1500 K. We see no evidence for an acoustic compression - ejection mechanism, suggesting that such a process is operative at desorption laser fluences lower than employed here. Our results suggest a general mechanism for the high-powered IR desorption from a liquid beam whereby desorbed species are ejected into the vacuum possessing considerable translational energy but remain internally cool. |
| first_indexed | 2025-11-14T07:52:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-24356 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:52:12Z |
| publishDate | 2003 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-243562017-09-13T15:12:28Z Infrared laser desorption of hydroquinone from a water-ethanol liquid beam Otten, D. Trevitt, B. Nichols, G. Metha, G. Buntine, Mark evaporation complexes irradiation Ionization/desorption mass-spectrometry molecules spectroscopy We have investigated the 1.9-mum IR desorption of hydroquinone in a water/ethanol liquid beam under relatively high desorption laser fluences (1316 and 2632 mJ cm(-2) pulse(-1)). The appearance of the IR desorption/UV ionization TOF mass spectrum of hydroquinone (HQ) is interpreted in terms of dissociation of solvated HQ clusters during the ionization event. The maximum in the hydroquinone desorption velocity distribution is 300 ms-1, and the translational temperature of the desorbed species is approximately 1500 K. We see no evidence for an acoustic compression - ejection mechanism, suggesting that such a process is operative at desorption laser fluences lower than employed here. Our results suggest a general mechanism for the high-powered IR desorption from a liquid beam whereby desorbed species are ejected into the vacuum possessing considerable translational energy but remain internally cool. 2003 Journal Article http://hdl.handle.net/20.500.11937/24356 10.1021/jp022248b American Chemical Society restricted |
| spellingShingle | evaporation complexes irradiation Ionization/desorption mass-spectrometry molecules spectroscopy Otten, D. Trevitt, B. Nichols, G. Metha, G. Buntine, Mark Infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| title | Infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| title_full | Infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| title_fullStr | Infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| title_full_unstemmed | Infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| title_short | Infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| title_sort | infrared laser desorption of hydroquinone from a water-ethanol liquid beam |
| topic | evaporation complexes irradiation Ionization/desorption mass-spectrometry molecules spectroscopy |
| url | http://hdl.handle.net/20.500.11937/24356 |