Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub>
The absolute absorption cross-section of the ethyl peroxy radical C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> in the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent=&...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/8/296 |
| _version_ | 1797522370642051072 |
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| author | Cuihong Zhang Mirna Shamas Mohamed Assali Xiaofeng Tang Weijun Zhang Laure Pillier Coralie Schoemaecker Christa Fittschen |
| author_facet | Cuihong Zhang Mirna Shamas Mohamed Assali Xiaofeng Tang Weijun Zhang Laure Pillier Coralie Schoemaecker Christa Fittschen |
| author_sort | Cuihong Zhang |
| collection | DOAJ |
| description | The absolute absorption cross-section of the ethyl peroxy radical C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> in the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> electronic transition with the peak wavelength at 7596 cm<sup>−1</sup> has been determined by the method of dual wavelengths time resolved continuous wave cavity ring down spectroscopy. C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> radicals were generated from pulsed 351 nm photolysis of C<sub>2</sub>H<sub>6</sub>/Cl<sub>2</sub> mixture in presence of 100 Torr O<sub>2</sub> at T = 295 K. C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> radicals were detected on one of the CRDS paths. Two methods have been applied for the determination of the C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> absorption cross-section: (i) based on Cl-atoms being converted alternatively to either C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> by adding C<sub>2</sub>H<sub>6</sub> or to hydro peroxy radicals, HO<sub>2</sub>, by adding CH<sub>3</sub>OH to the mixture, whereby HO<sub>2</sub> was reliably quantified on the second CRDS path in the 2ν<sub>1</sub> vibrational overtone at 6638.2 cm<sup>−1</sup> (ii) based on the reaction of C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> with HO<sub>2</sub>, measured under either excess HO<sub>2</sub> or under excess C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> concentration. Both methods lead to the same peak absorption cross-section for C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> at 7596 cm<sup>−1</sup> of σ = (1.0 ± 0.2) × 10<sup>−20</sup> cm<sup>2</sup>. The rate constant for the cross reaction between of C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> and HO<sub>2</sub> has been measured to be (6.2 ± 1.5) × 10<sup>−12</sup> cm<sup>3</sup> molecule<sup>−1</sup> s<sup>−1</sup>. |
| first_indexed | 2024-03-10T08:28:30Z |
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| id | doaj.art-958063de8f86401ead3947d5faf0c923 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T08:28:30Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
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| series | Photonics |
| spelling | doaj.art-958063de8f86401ead3947d5faf0c9232023-11-22T09:16:11ZengMDPI AGPhotonics2304-67322021-07-018829610.3390/photonics8080296Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub>Cuihong Zhang0Mirna Shamas1Mohamed Assali2Xiaofeng Tang3Weijun Zhang4Laure Pillier5Coralie Schoemaecker6Christa Fittschen7Université Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l’Atmosphère, F-59000 Lille, FranceUniversité Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l’Atmosphère, F-59000 Lille, FranceUniversité Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l’Atmosphère, F-59000 Lille, FranceLaboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaLaboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaUniversité Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l’Atmosphère, F-59000 Lille, FranceUniversité Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l’Atmosphère, F-59000 Lille, FranceUniversité Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l’Atmosphère, F-59000 Lille, FranceThe absolute absorption cross-section of the ethyl peroxy radical C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> in the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> electronic transition with the peak wavelength at 7596 cm<sup>−1</sup> has been determined by the method of dual wavelengths time resolved continuous wave cavity ring down spectroscopy. C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> radicals were generated from pulsed 351 nm photolysis of C<sub>2</sub>H<sub>6</sub>/Cl<sub>2</sub> mixture in presence of 100 Torr O<sub>2</sub> at T = 295 K. C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> radicals were detected on one of the CRDS paths. Two methods have been applied for the determination of the C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> absorption cross-section: (i) based on Cl-atoms being converted alternatively to either C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> by adding C<sub>2</sub>H<sub>6</sub> or to hydro peroxy radicals, HO<sub>2</sub>, by adding CH<sub>3</sub>OH to the mixture, whereby HO<sub>2</sub> was reliably quantified on the second CRDS path in the 2ν<sub>1</sub> vibrational overtone at 6638.2 cm<sup>−1</sup> (ii) based on the reaction of C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> with HO<sub>2</sub>, measured under either excess HO<sub>2</sub> or under excess C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> concentration. Both methods lead to the same peak absorption cross-section for C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> at 7596 cm<sup>−1</sup> of σ = (1.0 ± 0.2) × 10<sup>−20</sup> cm<sup>2</sup>. The rate constant for the cross reaction between of C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> and HO<sub>2</sub> has been measured to be (6.2 ± 1.5) × 10<sup>−12</sup> cm<sup>3</sup> molecule<sup>−1</sup> s<sup>−1</sup>.https://www.mdpi.com/2304-6732/8/8/296peroxy radicalsnear-infrared spectroscopyÃ←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula>electronic transitiocavity ring down spectroscopy |
| spellingShingle | Cuihong Zhang Mirna Shamas Mohamed Assali Xiaofeng Tang Weijun Zhang Laure Pillier Coralie Schoemaecker Christa Fittschen Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub> Photonics peroxy radicals near-infrared spectroscopy Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula>electronic transitio cavity ring down spectroscopy |
| title | Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub> |
| title_full | Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub> |
| title_fullStr | Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub> |
| title_full_unstemmed | Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub> |
| title_short | Absolute Absorption Cross-Section of the Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula> Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO<sub>2</sub> |
| title_sort | absolute absorption cross section of the a inline formula math xmlns http www w3 org 1998 math mathml display inline semantics mover accent true mi x mi mo mo mover semantics math inline formula electronic transition of the ethyl peroxy radical and rate constant of its cross reaction with ho sub 2 sub |
| topic | peroxy radicals near-infrared spectroscopy Ã←<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover accent="true"><mi>X</mi><mo>˜</mo></mover></semantics></math></inline-formula>electronic transitio cavity ring down spectroscopy |
| url | https://www.mdpi.com/2304-6732/8/8/296 |
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