PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN
A variety of strategies are employed to probe the photophysics of formic acid axcited to rovibronic levels close to its Ã-X̃ band origin. Together with previously published results the data reveal that in this energy regime HCO2H(Ã) decays primarily non-radiatively but does not dissociate to OH and...
| Päätekijät: | , |
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| Aineistotyyppi: | Journal article |
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1992
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| _version_ | 1826277284650156032 |
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| author | Brouard, M Wang, J |
| author_facet | Brouard, M Wang, J |
| author_sort | Brouard, M |
| collection | OXFORD |
| description | A variety of strategies are employed to probe the photophysics of formic acid axcited to rovibronic levels close to its Ã-X̃ band origin. Together with previously published results the data reveal that in this energy regime HCO2H(Ã) decays primarily non-radiatively but does not dissociate to OH and HCO, which are the dominant photofragments when formic acid is excited at shorter wavelengths. It is proposed that the most likely nonradiative pathway is internal conversion to the ground electronic state following which dissociation will occur probably via molecular elimination to H2O + CO. Detailed rovibronic state selective fluorescence lifetime measurements are shown to be consistent with the above mechanism, although weak additional coupling between HCO2H(Ã) and the triplet (nπ*) state cannot be ruled out. |
| first_indexed | 2024-03-06T23:26:35Z |
| format | Journal article |
| id | oxford-uuid:6a92d860-38d5-49a7-a0b7-cb4cd6fbd573 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:26:35Z |
| publishDate | 1992 |
| record_format | dspace |
| spelling | oxford-uuid:6a92d860-38d5-49a7-a0b7-cb4cd6fbd5732022-03-26T18:58:23ZPHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGINJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6a92d860-38d5-49a7-a0b7-cb4cd6fbd573Symplectic Elements at Oxford1992Brouard, MWang, JA variety of strategies are employed to probe the photophysics of formic acid axcited to rovibronic levels close to its Ã-X̃ band origin. Together with previously published results the data reveal that in this energy regime HCO2H(Ã) decays primarily non-radiatively but does not dissociate to OH and HCO, which are the dominant photofragments when formic acid is excited at shorter wavelengths. It is proposed that the most likely nonradiative pathway is internal conversion to the ground electronic state following which dissociation will occur probably via molecular elimination to H2O + CO. Detailed rovibronic state selective fluorescence lifetime measurements are shown to be consistent with the above mechanism, although weak additional coupling between HCO2H(Ã) and the triplet (nπ*) state cannot be ruled out. |
| spellingShingle | Brouard, M Wang, J PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN |
| title | PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN |
| title_full | PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN |
| title_fullStr | PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN |
| title_full_unstemmed | PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN |
| title_short | PHOTOPHYSICS OF HCO2H(A)OVER-TILDE) CLOSE TO ITS ELECTRONIC ORIGIN |
| title_sort | photophysics of hco2h a over tilde close to its electronic origin |
| work_keys_str_mv | AT brouardm photophysicsofhco2haovertildeclosetoitselectronicorigin AT wangj photophysicsofhco2haovertildeclosetoitselectronicorigin |