AustralieFrV1, PascalFrancis, Curation, bibRecord, 004332

Photodissociation dynamics of ClOOCl at 248.4 and 308.4 nm

Identifieur interne : 004332 ( PascalFrancis/Curation ); précédent : 004331; suivant : 004333

Photodissociation dynamics of ClOOCl at 248.4 and 308.4 nm

Auteurs : Wen-Tsung Huang [Taïwan] ; Andrew F. Chen [Taïwan] ; I-Cheng Chen [Taïwan] ; Chen-Hsun Tsai [Taïwan] ; Jim Jr-Min Lin [Taïwan]

Source :

PCCP. Physical chemistry chemical physics : (Print) [ 1463-9076 ] ; 2011.

RBID : Pascal:11-0290994

Descripteurs français

Pascal (Inist)
- Photodissociation, Dynamique, Energie translationnelle, Distribution énergie, Anisotropie, Mécanisme, Séquentiel, Dissociation, Rapport branchement, Excitation, Impureté, Photolyse, Longueur onde, 3380G.

English descriptors

KwdEn :
- Anisotropy, Branching ratio, Dissociation, Dynamics, Energy distribution, Excitation, Impurity, Mechanism, Photodissociation, Photolysis, Sequential, Translational energy, Wavelength.

Abstract

The dynamics of ClOOCl photodissociation at 248.4 and 308.4 nm was studied with photofragment translational spectroscopy. At 248.4 nm photoexcitation, the observed products are Cl, O₂, ClO and O. Product translational energy distributions P(E) and anisotropy parameters β were deduced from the measured time-of-flight spectra of the Cl, O₂, and ClO photoproducts. The photodissociation mechanisms have been discussed and compared with available theoretical results. Synchronous and fast sequential breaking of the two Cl-O bonds may both contribute to the dissociation. The relative product yields for [ClO]: [Cl] was measured to be 0.15 ± 0.04: 1. The relative amounts of [O]: [O₂] products were estimated to be 0.12: 1. The branching ratios among the Cl + O₂ + Cl: ClO + CIO: CIO + Cl + O product channels were estimated to be 0.82: 0.08: 0.10. At 308.4 nm excitation, time-of-flight spectra of the O₂ and ClO photoproducts were recorded while there was interference from Cl₂ impurity in detecting the Cl product. Nonetheless, the observed ClO yield relative to the O₂ yield at 308.4 nm is 1.5 times that at 248.4 nm. The branching ratio between the Cl + O₂ + Cl: ClO + ClO product channels was estimated to be 0.81: 0.19 at 308.4 nm. This result suggests that the ClO product may contribute a noticeable yield in the photolysis of ClOOCl at the atmospherically important wavelengths above 300 nm.

A01	`01`	`1`		`@0 1463-9076`
A03		`1`		`@0 PCCP, Phys. chem. chem. phys. : (Print)`
A05				`@2 13`
A06				`@2 18`
A08	`01`	`1`	`ENG`	`@1 Photodissociation dynamics of ClOOCl at 248.4 and 308.4 nm`
A09	`01`	`1`	`ENG`	`@1 Molecular Collision Dynamics`
A11	`01`	`1`		`@1 HUANG (Wen-Tsung)`
A11	`02`	`1`		`@1 CHEN (Andrew F.)`
A11	`03`	`1`		`@1 CHEN (I-Cheng)`
A11	`04`	`1`		`@1 TSAI (Chen-Hsun)`
A11	`05`	`1`		`@1 JR-MIN LIN (Jim)`
A12	`01`	`1`		`@1 CASAVECCHIA (Piergiorgio) @9 ed.`
A12	`02`	`1`		`@1 BROUARD (Mark) @9 ed.`
A12	`03`	`1`		`@1 COSTES (Michel) @9 ed.`
A12	`04`	`1`		`@1 NESBITT (David) @9 ed.`
A12	`05`	`1`		`@1 BIESKE (Evan) @9 ed.`
A12	`06`	`1`		`@1 KABLE (Scott) @9 ed.`
A14	`01`			`@1 Institute of Atomic and Molecular Sciences, Academia Sinica, @2 Taipei 10617 @3 TWN @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut. @Z 5 aut.`
A14	`02`			`@1 Department of Chemistry, National Taiwan University @2 Taipei 10617 @3 TWN @Z 1 aut. @Z 5 aut.`
A14	`03`			`@1 Department of Applied Chemistry, National Chiao Tung University @2 Hsinchu 30010 @3 TWN @Z 5 aut.`
A15	`01`			`@1 Università degli Studi di Perugia, Dipartimento di Chimica, via Elce dio Sotto, 8 @2 06123 Perugia @3 ITA @Z 1 aut.`
A15	`02`			`@1 Oxford University, Department of Chemistry, The Physical and Theoretical Chemistry Laboratory, South Parks Road @2 Oxford, OX1 3QZ @3 GBR @Z 2 aut.`
A15	`03`			`@1 Université Bordeaux 1/CNRS UMR 5255, Institut des Sciences Moléculaires @2 33405 Talence @3 FRA @Z 3 aut.`
A15	`04`			`@1 JILA/NIST, Department of Chemistry and Biochemistry, University of Colorado, @2 Boulder, CO, 80309 @3 USA @Z 4 aut.`
A15	`05`			`@1 University of Melbourne, School of Chemistry @3 AUS @Z 5 aut.`
A15	`06`			`@1 University of Sydney, School of Chemistry @3 AUS @Z 6 aut.`
A20				`@1 8195-8203`
A21				`@1 2011`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 26801 @5 354000191573960140`
A44				`@0 0000 @1 © 2011 INIST-CNRS. All rights reserved.`
A45				`@0 42 ref.`
A47	`01`	`1`		`@0 11-0290994`
A60				`@1 P @3 PR`
A61				`@0 A`
A64	`01`	`1`		`@0 PCCP. Physical chemistry chemical physics : (Print)`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 The dynamics of ClOOCl photodissociation at 248.4 and 308.4 nm was studied with photofragment translational spectroscopy. At 248.4 nm photoexcitation, the observed products are Cl, O₂, ClO and O. Product translational energy distributions P(E) and anisotropy parameters β were deduced from the measured time-of-flight spectra of the Cl, O₂, and ClO photoproducts. The photodissociation mechanisms have been discussed and compared with available theoretical results. Synchronous and fast sequential breaking of the two Cl-O bonds may both contribute to the dissociation. The relative product yields for [ClO]: [Cl] was measured to be 0.15 ± 0.04: 1. The relative amounts of [O]: [O₂] products were estimated to be 0.12: 1. The branching ratios among the Cl + O₂ + Cl: ClO + CIO: CIO + Cl + O product channels were estimated to be 0.82: 0.08: 0.10. At 308.4 nm excitation, time-of-flight spectra of the O₂ and ClO photoproducts were recorded while there was interference from Cl₂ impurity in detecting the Cl product. Nonetheless, the observed ClO yield relative to the O₂ yield at 308.4 nm is 1.5 times that at 248.4 nm. The branching ratio between the Cl + O₂ + Cl: ClO + ClO product channels was estimated to be 0.81: 0.19 at 308.4 nm. This result suggests that the ClO product may contribute a noticeable yield in the photolysis of ClOOCl at the atmospherically important wavelengths above 300 nm.
C02	`01`	`X`		`@0 001C01`
C02	`02`	`X`		`@0 001C01F01`
C03	`01`	`X`	`FRE`	`@0 Photodissociation @5 01`
C03	`01`	`X`	`ENG`	`@0 Photodissociation @5 01`
C03	`01`	`X`	`SPA`	`@0 Fotodisociación @5 01`
C03	`02`	`X`	`FRE`	`@0 Dynamique @5 02`
C03	`02`	`X`	`ENG`	`@0 Dynamics @5 02`
C03	`02`	`X`	`SPA`	`@0 Dinámica @5 02`
C03	`03`	`X`	`FRE`	`@0 Energie translationnelle @5 03`
C03	`03`	`X`	`ENG`	`@0 Translational energy @5 03`
C03	`03`	`X`	`SPA`	`@0 Energía traslacional @5 03`
C03	`04`	`X`	`FRE`	`@0 Distribution énergie @5 04`
C03	`04`	`X`	`ENG`	`@0 Energy distribution @5 04`
C03	`04`	`X`	`SPA`	`@0 Distribución energía @5 04`
C03	`05`	`X`	`FRE`	`@0 Anisotropie @5 05`
C03	`05`	`X`	`ENG`	`@0 Anisotropy @5 05`
C03	`05`	`X`	`SPA`	`@0 Anisotropía @5 05`
C03	`06`	`X`	`FRE`	`@0 Mécanisme @5 06`
C03	`06`	`X`	`ENG`	`@0 Mechanism @5 06`
C03	`06`	`X`	`SPA`	`@0 Mecanismo @5 06`
C03	`07`	`X`	`FRE`	`@0 Séquentiel @5 07`
C03	`07`	`X`	`ENG`	`@0 Sequential @5 07`
C03	`07`	`X`	`SPA`	`@0 Secuencial @5 07`
C03	`08`	`X`	`FRE`	`@0 Dissociation @5 08`
C03	`08`	`X`	`ENG`	`@0 Dissociation @5 08`
C03	`08`	`X`	`SPA`	`@0 Disociación @5 08`
C03	`09`	`X`	`FRE`	`@0 Rapport branchement @5 09`
C03	`09`	`X`	`ENG`	`@0 Branching ratio @5 09`
C03	`09`	`X`	`SPA`	`@0 Relación ramificación @5 09`
C03	`10`	`X`	`FRE`	`@0 Excitation @5 10`
C03	`10`	`X`	`ENG`	`@0 Excitation @5 10`
C03	`10`	`X`	`SPA`	`@0 Excitación @5 10`
C03	`11`	`X`	`FRE`	`@0 Impureté @5 11`
C03	`11`	`X`	`ENG`	`@0 Impurity @5 11`
C03	`11`	`X`	`SPA`	`@0 Impureza @5 11`
C03	`12`	`X`	`FRE`	`@0 Photolyse @5 12`
C03	`12`	`X`	`ENG`	`@0 Photolysis @5 12`
C03	`12`	`X`	`SPA`	`@0 Fotolisis @5 12`
C03	`13`	`X`	`FRE`	`@0 Longueur onde @5 13`
C03	`13`	`X`	`ENG`	`@0 Wavelength @5 13`
C03	`13`	`X`	`SPA`	`@0 Longitud onda @5 13`
C03	`14`	`X`	`FRE`	`@0 3380G @4 INC @5 32`
N21				`@1 192`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anisotropy</term>
<term>Branching ratio</term>
<term>Dissociation</term>
<term>Dynamics</term>
<term>Energy distribution</term>
<term>Excitation</term>
<term>Impurity</term>
<term>Mechanism</term>
<term>Photodissociation</term>
<term>Photolysis</term>
<term>Sequential</term>
<term>Translational energy</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Photodissociation</term>
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<term>Distribution énergie</term>
<term>Anisotropie</term>
<term>Mécanisme</term>
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<term>Dissociation</term>
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<term>Excitation</term>
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<front><div type="abstract" xml:lang="en">The dynamics of ClOOCl photodissociation at 248.4 and 308.4 nm was studied with photofragment translational spectroscopy. At 248.4 nm photoexcitation, the observed products are Cl, O<sub>2</sub>
, ClO and O. Product translational energy distributions P(E) and anisotropy parameters β were deduced from the measured time-of-flight spectra of the Cl, O<sub>2</sub>
, and ClO photoproducts. The photodissociation mechanisms have been discussed and compared with available theoretical results. Synchronous and fast sequential breaking of the two Cl-O bonds may both contribute to the dissociation. The relative product yields for [ClO]: [Cl] was measured to be 0.15 ± 0.04: 1. The relative amounts of [O]: [O<sub>2</sub>
] products were estimated to be 0.12: 1. The branching ratios among the Cl + O<sub>2</sub>
 + Cl: ClO + CIO: CIO + Cl + O product channels were estimated to be 0.82: 0.08: 0.10. At 308.4 nm excitation, time-of-flight spectra of the O<sub>2</sub>
 and ClO photoproducts were recorded while there was interference from Cl<sub>2</sub>
 impurity in detecting the Cl product. Nonetheless, the observed ClO yield relative to the O<sub>2</sub>
 yield at 308.4 nm is 1.5 times that at 248.4 nm. The branching ratio between the Cl + O<sub>2</sub>
 + Cl: ClO + ClO product channels was estimated to be 0.81: 0.19 at 308.4 nm. This result suggests that the ClO product may contribute a noticeable yield in the photolysis of ClOOCl at the atmospherically important wavelengths above 300 nm.</div>
</front>
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<fA08 i1="01" i2="1" l="ENG"><s1>Photodissociation dynamics of ClOOCl at 248.4 and 308.4 nm</s1>
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<fA09 i1="01" i2="1" l="ENG"><s1>Molecular Collision Dynamics</s1>
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<fA11 i1="01" i2="1"><s1>HUANG (Wen-Tsung)</s1>
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<fA11 i1="02" i2="1"><s1>CHEN (Andrew F.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>CHEN (I-Cheng)</s1>
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<fA11 i1="04" i2="1"><s1>TSAI (Chen-Hsun)</s1>
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<fA11 i1="05" i2="1"><s1>JR-MIN LIN (Jim)</s1>
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<fA12 i1="01" i2="1"><s1>CASAVECCHIA (Piergiorgio)</s1>
<s9>ed.</s9>
</fA12>
<fA12 i1="02" i2="1"><s1>BROUARD (Mark)</s1>
<s9>ed.</s9>
</fA12>
<fA12 i1="03" i2="1"><s1>COSTES (Michel)</s1>
<s9>ed.</s9>
</fA12>
<fA12 i1="04" i2="1"><s1>NESBITT (David)</s1>
<s9>ed.</s9>
</fA12>
<fA12 i1="05" i2="1"><s1>BIESKE (Evan)</s1>
<s9>ed.</s9>
</fA12>
<fA12 i1="06" i2="1"><s1>KABLE (Scott)</s1>
<s9>ed.</s9>
</fA12>
<fA14 i1="01"><s1>Institute of Atomic and Molecular Sciences, Academia Sinica,</s1>
<s2>Taipei 10617</s2>
<s3>TWN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Department of Chemistry, National Taiwan University</s1>
<s2>Taipei 10617</s2>
<s3>TWN</s3>
<sZ>1 aut.</sZ>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>Department of Applied Chemistry, National Chiao Tung University</s1>
<s2>Hsinchu 30010</s2>
<s3>TWN</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA15 i1="01"><s1>Università degli Studi di Perugia, Dipartimento di Chimica, via Elce dio Sotto, 8</s1>
<s2>06123 Perugia</s2>
<s3>ITA</s3>
<sZ>1 aut.</sZ>
</fA15>
<fA15 i1="02"><s1>Oxford University, Department of Chemistry, The Physical and Theoretical Chemistry Laboratory, South Parks Road</s1>
<s2>Oxford, OX1 3QZ</s2>
<s3>GBR</s3>
<sZ>2 aut.</sZ>
</fA15>
<fA15 i1="03"><s1>Université Bordeaux 1/CNRS UMR 5255, Institut des Sciences Moléculaires</s1>
<s2>33405 Talence</s2>
<s3>FRA</s3>
<sZ>3 aut.</sZ>
</fA15>
<fA15 i1="04"><s1>JILA/NIST, Department of Chemistry and Biochemistry, University of Colorado,</s1>
<s2>Boulder, CO, 80309</s2>
<s3>USA</s3>
<sZ>4 aut.</sZ>
</fA15>
<fA15 i1="05"><s1>University of Melbourne, School of Chemistry</s1>
<s3>AUS</s3>
<sZ>5 aut.</sZ>
</fA15>
<fA15 i1="06"><s1>University of Sydney, School of Chemistry</s1>
<s3>AUS</s3>
<sZ>6 aut.</sZ>
</fA15>
<fA20><s1>8195-8203</s1>
</fA20>
<fA21><s1>2011</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>26801</s2>
<s5>354000191573960140</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2011 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>42 ref.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>11-0290994</s0>
</fA47>
<fA60><s1>P</s1>
<s3>PR</s3>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>PCCP. Physical chemistry chemical physics : (Print)</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>The dynamics of ClOOCl photodissociation at 248.4 and 308.4 nm was studied with photofragment translational spectroscopy. At 248.4 nm photoexcitation, the observed products are Cl, O<sub>2</sub>
, ClO and O. Product translational energy distributions P(E) and anisotropy parameters β were deduced from the measured time-of-flight spectra of the Cl, O<sub>2</sub>
, and ClO photoproducts. The photodissociation mechanisms have been discussed and compared with available theoretical results. Synchronous and fast sequential breaking of the two Cl-O bonds may both contribute to the dissociation. The relative product yields for [ClO]: [Cl] was measured to be 0.15 ± 0.04: 1. The relative amounts of [O]: [O<sub>2</sub>
] products were estimated to be 0.12: 1. The branching ratios among the Cl + O<sub>2</sub>
 + Cl: ClO + CIO: CIO + Cl + O product channels were estimated to be 0.82: 0.08: 0.10. At 308.4 nm excitation, time-of-flight spectra of the O<sub>2</sub>
 and ClO photoproducts were recorded while there was interference from Cl<sub>2</sub>
 impurity in detecting the Cl product. Nonetheless, the observed ClO yield relative to the O<sub>2</sub>
 yield at 308.4 nm is 1.5 times that at 248.4 nm. The branching ratio between the Cl + O<sub>2</sub>
 + Cl: ClO + ClO product channels was estimated to be 0.81: 0.19 at 308.4 nm. This result suggests that the ClO product may contribute a noticeable yield in the photolysis of ClOOCl at the atmospherically important wavelengths above 300 nm.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001C01</s0>
</fC02>
<fC02 i1="02" i2="X"><s0>001C01F01</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Photodissociation</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Photodissociation</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Fotodisociación</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Dynamique</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Dynamics</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Dinámica</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Energie translationnelle</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Translational energy</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Energía traslacional</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Distribution énergie</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Energy distribution</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Distribución energía</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Anisotropie</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Anisotropy</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Anisotropía</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Mécanisme</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Mechanism</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Mecanismo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Séquentiel</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Sequential</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Secuencial</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Dissociation</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Dissociation</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Disociación</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Rapport branchement</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Branching ratio</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Relación ramificación</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Excitation</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Excitation</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Excitación</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Impureté</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Impurity</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Impureza</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Photolyse</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Photolysis</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Fotolisis</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Longueur onde</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Wavelength</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Longitud onda</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>3380G</s0>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fN21><s1>192</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

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Photodissociation dynamics of ClOOCl at 248.4 and 308.4 nm

Photodissociation dynamics of ClOOCl at 248.4 and 308.4 nm

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