AustralieFrV1, PascalFrancis, Curation, bibRecord, 004331

Photodissociation dynamics of the tert-butyl radical via photofragment translational spectroscopy at 248 nm

Identifieur interne : 004331 ( PascalFrancis/Curation ); précédent : 004330; suivant : 004332

Photodissociation dynamics of the tert-butyl radical via photofragment translational spectroscopy at 248 nm

Auteurs : Bogdan Negru [États-Unis] ; Gabriel M. P. Just [États-Unis] ; Dayoung Park [États-Unis] ; Daniel M. Neumark [États-Unis]

Source :

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

RBID : Pascal:11-0290993

Descripteurs français

Pascal (Inist)
- Photodissociation, Dynamique, Pyrolyse, Butane, Dissociation, Energie translationnelle, Distribution énergie, Rapport branchement, Etat fondamental, Mécanisme, Etat excité, 3380G.
Wicri :
- topic : Butane.

English descriptors

KwdEn :
- Branching ratio, Butane, Dissociation, Dynamics, Energy distribution, Excited state, Ground state, Mechanism, Photodissociation, Pyrolysis, Translational energy.

Abstract

The photodissociation dynamics of the tert-butyl radical (t-C₄H₉) were investigated using photofragment translational spectroscopy. The tert-butyl radical was produced from flash pyrolysis of azo-tert-butane and dissociated at 248 nm. Two distinct channels of approximately equal importance were identified: dissociation to H + 2-methylpropene, and CH₃ + dimethylcarbene. Neither the translational energy distributions that describe these two channels nor the product branching ratio are consistent with statistical dissociation on the ground state, and instead favor a mechanism taking place on excited state surfaces.

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A08	`01`	`1`	`ENG`	`@1 Photodissociation dynamics of the tert-butyl radical via photofragment translational spectroscopy at 248 nm`
A09	`01`	`1`	`ENG`	`@1 Molecular Collision Dynamics`
A11	`01`	`1`		`@1 NEGRU (Bogdan)`
A11	`02`	`1`		`@1 JUST (Gabriel M. P.)`
A11	`03`	`1`		`@1 PARK (Dayoung)`
A11	`04`	`1`		`@1 NEUMARK (Daniel M.)`
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 Department of Chenaistry, University of California @2 Berkeley, CA 94720 @3 USA @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut.`
A14	`02`			`@1 Chemical Sciences Division, Lawrence Berkeley National Laboratory @2 Berkeley, CA 94720 @3 USA @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 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 8180-8185`
A21				`@1 2011`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 26801 @5 354000191573960120`
A44				`@0 0000 @1 © 2011 INIST-CNRS. All rights reserved.`
A45				`@0 42 ref.`
A47	`01`	`1`		`@0 11-0290993`
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A64	`01`	`1`		`@0 PCCP. Physical chemistry chemical physics : (Print)`
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C01	`01`		`ENG`	@0 The photodissociation dynamics of the tert-butyl radical (t-C₄H₉) were investigated using photofragment translational spectroscopy. The tert-butyl radical was produced from flash pyrolysis of azo-tert-butane and dissociated at 248 nm. Two distinct channels of approximately equal importance were identified: dissociation to H + 2-methylpropene, and CH₃ + dimethylcarbene. Neither the translational energy distributions that describe these two channels nor the product branching ratio are consistent with statistical dissociation on the ground state, and instead favor a mechanism taking place on excited state surfaces.
C02	`01`	`X`		`@0 001C01`
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 Pyrolyse @5 03`
C03	`03`	`X`	`ENG`	`@0 Pyrolysis @5 03`
C03	`03`	`X`	`SPA`	`@0 Pirólisis @5 03`
C03	`04`	`X`	`FRE`	`@0 Butane @2 NK @5 04`
C03	`04`	`X`	`ENG`	`@0 Butane @2 NK @5 04`
C03	`04`	`X`	`SPA`	`@0 Butano @2 NK @5 04`
C03	`05`	`X`	`FRE`	`@0 Dissociation @5 05`
C03	`05`	`X`	`ENG`	`@0 Dissociation @5 05`
C03	`05`	`X`	`SPA`	`@0 Disociación @5 05`
C03	`06`	`X`	`FRE`	`@0 Energie translationnelle @5 06`
C03	`06`	`X`	`ENG`	`@0 Translational energy @5 06`
C03	`06`	`X`	`SPA`	`@0 Energía traslacional @5 06`
C03	`07`	`X`	`FRE`	`@0 Distribution énergie @5 07`
C03	`07`	`X`	`ENG`	`@0 Energy distribution @5 07`
C03	`07`	`X`	`SPA`	`@0 Distribución energía @5 07`
C03	`08`	`X`	`FRE`	`@0 Rapport branchement @5 08`
C03	`08`	`X`	`ENG`	`@0 Branching ratio @5 08`
C03	`08`	`X`	`SPA`	`@0 Relación ramificación @5 08`
C03	`09`	`X`	`FRE`	`@0 Etat fondamental @5 09`
C03	`09`	`X`	`ENG`	`@0 Ground state @5 09`
C03	`09`	`X`	`SPA`	`@0 Estado fundamental @5 09`
C03	`10`	`X`	`FRE`	`@0 Mécanisme @5 10`
C03	`10`	`X`	`ENG`	`@0 Mechanism @5 10`
C03	`10`	`X`	`SPA`	`@0 Mecanismo @5 10`
C03	`11`	`X`	`FRE`	`@0 Etat excité @5 11`
C03	`11`	`X`	`ENG`	`@0 Excited state @5 11`
C03	`11`	`X`	`SPA`	`@0 Estado excitado @5 11`
C03	`12`	`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>Branching ratio</term>
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<term>Dissociation</term>
<term>Dynamics</term>
<term>Energy distribution</term>
<term>Excited state</term>
<term>Ground state</term>
<term>Mechanism</term>
<term>Photodissociation</term>
<term>Pyrolysis</term>
<term>Translational energy</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Photodissociation</term>
<term>Dynamique</term>
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<term>Dissociation</term>
<term>Energie translationnelle</term>
<term>Distribution énergie</term>
<term>Rapport branchement</term>
<term>Etat fondamental</term>
<term>Mécanisme</term>
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<front><div type="abstract" xml:lang="en">The photodissociation dynamics of the tert-butyl radical (t-C<sub>4</sub>
H<sub>9</sub>
) were investigated using photofragment translational spectroscopy. The tert-butyl radical was produced from flash pyrolysis of azo-tert-butane and dissociated at 248 nm. Two distinct channels of approximately equal importance were identified: dissociation to H + 2-methylpropene, and CH<sub>3</sub>
 + dimethylcarbene. Neither the translational energy distributions that describe these two channels nor the product branching ratio are consistent with statistical dissociation on the ground state, and instead favor a mechanism taking place on excited state surfaces.</div>
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<fA14 i1="01"><s1>Department of Chenaistry, University of California</s1>
<s2>Berkeley, CA 94720</s2>
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<fA15 i1="01"><s1>Università degli Studi di Perugia, Dipartimento di Chimica, via Elce dio Sotto, 8</s1>
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<sZ>1 aut.</sZ>
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<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>
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<fA15 i1="03"><s1>Université Bordeaux 1/CNRS UMR 5255, Institut des Sciences Moléculaires</s1>
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<fA15 i1="04"><s1>JILA/NIST, Department of Chemistry and Biochemistry, University of Colorado,</s1>
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<fA15 i1="05"><s1>University of Melbourne, School of Chemistry</s1>
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<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>The photodissociation dynamics of the tert-butyl radical (t-C<sub>4</sub>
H<sub>9</sub>
) were investigated using photofragment translational spectroscopy. The tert-butyl radical was produced from flash pyrolysis of azo-tert-butane and dissociated at 248 nm. Two distinct channels of approximately equal importance were identified: dissociation to H + 2-methylpropene, and CH<sub>3</sub>
 + dimethylcarbene. Neither the translational energy distributions that describe these two channels nor the product branching ratio are consistent with statistical dissociation on the ground state, and instead favor a mechanism taking place on excited state surfaces.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001C01</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>Pyrolyse</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Pyrolysis</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Pirólisis</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Butane</s0>
<s2>NK</s2>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Butane</s0>
<s2>NK</s2>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Butano</s0>
<s2>NK</s2>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Dissociation</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Dissociation</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Disociación</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Energie translationnelle</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Translational energy</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Energía traslacional</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Distribution énergie</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Energy distribution</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Distribución energía</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Rapport branchement</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Branching ratio</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Relación ramificación</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Etat fondamental</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Ground state</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Estado fundamental</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Mécanisme</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Mechanism</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Mecanismo</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Etat excité</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Excited state</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Estado excitado</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" 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 the tert-butyl radical via photofragment translational spectroscopy at 248 nm

Photodissociation dynamics of the tert-butyl radical via photofragment translational spectroscopy at 248 nm

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