Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity
Resonance-enhanced 266 nm 1 + 1 multiphoton ionization has been used in conjunction with a liquid microjet time-of-flight mass spectrometer to explore the photochemistry of a 10–3 M solution of anisole in ethanol. Only ions generated in the condensed phase originating from the three-photon non-reson...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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CSIRO Publishing
2003
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| Online Access: | http://hdl.handle.net/20.500.11937/39994 |
| _version_ | 1848755745635434496 |
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| author | Holstein, W. Dobeck, L. Otten, D. Metha, G. Buntine, Mark |
| author_facet | Holstein, W. Dobeck, L. Otten, D. Metha, G. Buntine, Mark |
| author_sort | Holstein, W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Resonance-enhanced 266 nm 1 + 1 multiphoton ionization has been used in conjunction with a liquid microjet time-of-flight mass spectrometer to explore the photochemistry of a 10–3 M solution of anisole in ethanol. Only ions generated in the condensed phase originating from the three-photon non-resonant ionization of the ethanol solvent are liberated into the vacuum. No solute ions generated in solution are observed unless the concentration is increased to 1 M. Under high concentration conditions, solute pairing or aggregation at the liquid surface is a necessary precursor towards liberating solute photoions into the vacuum via a Coulombic explosion. At a solution concentration of 10–3 M, a decreased solute ion density at the liquid surface is insufficient to initiate a Coulombic explosion into the vacuum. Rather, non-resonantly generated solvent ions on the liquid surface dominate the ion ejection process. Related studies on 10–3 M solutions of 4-methoxyphenol in both ethanol and water show that at this concentration solute ionization is most likely to be observed following thermal evaporation from the surface of a liquid beam. |
| first_indexed | 2025-11-14T09:01:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-39994 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:01:11Z |
| publishDate | 2003 |
| publisher | CSIRO Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-399942017-09-13T15:08:56Z Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity Holstein, W. Dobeck, L. Otten, D. Metha, G. Buntine, Mark Cluster ions Aqueous-solution dissociation Ion-molecule reactions Beam ejection Photoionization Multiphoton ionization Aniline ethanol solution Desorption mass-spectrometry Resonance-enhanced 266 nm 1 + 1 multiphoton ionization has been used in conjunction with a liquid microjet time-of-flight mass spectrometer to explore the photochemistry of a 10–3 M solution of anisole in ethanol. Only ions generated in the condensed phase originating from the three-photon non-resonant ionization of the ethanol solvent are liberated into the vacuum. No solute ions generated in solution are observed unless the concentration is increased to 1 M. Under high concentration conditions, solute pairing or aggregation at the liquid surface is a necessary precursor towards liberating solute photoions into the vacuum via a Coulombic explosion. At a solution concentration of 10–3 M, a decreased solute ion density at the liquid surface is insufficient to initiate a Coulombic explosion into the vacuum. Rather, non-resonantly generated solvent ions on the liquid surface dominate the ion ejection process. Related studies on 10–3 M solutions of 4-methoxyphenol in both ethanol and water show that at this concentration solute ionization is most likely to be observed following thermal evaporation from the surface of a liquid beam. 2003 Journal Article http://hdl.handle.net/20.500.11937/39994 10.1071/CH03011 CSIRO Publishing restricted |
| spellingShingle | Cluster ions Aqueous-solution dissociation Ion-molecule reactions Beam ejection Photoionization Multiphoton ionization Aniline ethanol solution Desorption mass-spectrometry Holstein, W. Dobeck, L. Otten, D. Metha, G. Buntine, Mark Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity |
| title | Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity |
| title_full | Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity |
| title_fullStr | Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity |
| title_full_unstemmed | Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity |
| title_short | Ultraviolet laser irradiation of low concentration liquid microjets: Solute evaporation and solvent initiated reactivity |
| title_sort | ultraviolet laser irradiation of low concentration liquid microjets: solute evaporation and solvent initiated reactivity |
| topic | Cluster ions Aqueous-solution dissociation Ion-molecule reactions Beam ejection Photoionization Multiphoton ionization Aniline ethanol solution Desorption mass-spectrometry |
| url | http://hdl.handle.net/20.500.11937/39994 |