Photodissociation of i-C{sub 3}H{sub 7}I within the A band and anisotropy-based decomposition of the transitional energy distributions.

Shubert, V A; Rednic, M; Pratt, S T

doi:10.1063/1.3094321

Title: Photodissociation of i-C{sub 3}H{sub 7}I within the A band and anisotropy-based decomposition of the transitional energy distributions.

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Abstract

The photodissociation of i-propyl iodide in the A absorption band was studied by using velocity map ion imaging following excitation between 304 and 253 nm. The translational energy distributions and translational energy dependence of the angular distributions of the I{sup 2}P{sub 3/2} and {sup 2}P{sub 1/2} photofragments were recorded as a function of the photodissociation wavelength. These distributions are used to decompose the i-C{sub 3}H{sub 7}+I {sup 2}P{sub 3/2} channel into contributions from two processes: Excitation to the {sup 3}Q{sub 0{sup +}} state followed by crossing onto the {sup 1}Q{sub 1} surface, and direct excitation to the {sup 3}Q{sub 1} surface followed by dissociation on that surface. As in the case of methyl iodide, the former process dominates; the latter process contributes only in the red wing of the absorption band, with its contribution peaking at {approx}287 nm with an absorption of {approx}1% of the band maximum. The data for the i-C{sub 3}H{sub 7}+I* {sup 2}P{sub 1/2} channel display a smooth behavior across the full energy range of the present study, and are consistent with direct excitation to the {sup 3}Q{sub 0{sup +}} surface followed by dissociation on that surface.

Authors:: Shubert, V A; Rednic, M; Pratt, S T

Publication Date:: Tue Apr 07 00:00:00 EDT 2009

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC); Univ. of Chicago/Argonne Strategic Collaborative Initiative

OSTI Identifier:: 952926

Report Number(s):: ANL/CSE/63302
Journal ID: ISSN 0021-9606; JCPSA6; TRN: US200914%%74

DOE Contract Number:: DE-AC02-06CH11357

Resource Type:: Journal Article

Journal Name:: J. Chem. Phys.

Additional Journal Information:: Journal Volume: 130; Journal Issue: Apr. 7. 2009; Journal ID: ISSN 0021-9606

Country of Publication:: United States

Language:: ENGLISH

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; IODINATED ALIPHATIC HYDROCARBONS; PHOTOLYSIS; EXCITATION; DISSOCIATION

Citation Formats


                    Shubert, V A, Rednic, M, Pratt, S T, Chemical Sciences and Engineering Division, and Univ. of Illinois. Photodissociation of i-C{sub 3}H{sub 7}I within the A band and anisotropy-based decomposition of the transitional energy distributions..  United States: N. p., 2009. 
        Web.  doi:10.1063/1.3094321.

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                    Shubert, V A, Rednic, M, Pratt, S T, Chemical Sciences and Engineering Division, & Univ. of Illinois. Photodissociation of i-C{sub 3}H{sub 7}I within the A band and anisotropy-based decomposition of the transitional energy distributions..  United States.  https://doi.org/10.1063/1.3094321

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                    Shubert, V A, Rednic, M, Pratt, S T, Chemical Sciences and Engineering Division, and Univ. of Illinois. 2009.  
        "Photodissociation of i-C{sub 3}H{sub 7}I within the A band and anisotropy-based decomposition of the transitional energy distributions.".  United States.  https://doi.org/10.1063/1.3094321.

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@article{osti_952926,

  title        = {Photodissociation of i-C{sub 3}H{sub 7}I within the A band and anisotropy-based decomposition of the transitional energy distributions.},

  author       = {Shubert, V A and Rednic, M and Pratt, S T and Chemical Sciences and Engineering Division and Univ. of Illinois},

  abstractNote = {The photodissociation of i-propyl iodide in the A absorption band was studied by using velocity map ion imaging following excitation between 304 and 253 nm. The translational energy distributions and translational energy dependence of the angular distributions of the I{sup 2}P{sub 3/2} and {sup 2}P{sub 1/2} photofragments were recorded as a function of the photodissociation wavelength. These distributions are used to decompose the i-C{sub 3}H{sub 7}+I {sup 2}P{sub 3/2} channel into contributions from two processes: Excitation to the {sup 3}Q{sub 0{sup +}} state followed by crossing onto the {sup 1}Q{sub 1} surface, and direct excitation to the {sup 3}Q{sub 1} surface followed by dissociation on that surface. As in the case of methyl iodide, the former process dominates; the latter process contributes only in the red wing of the absorption band, with its contribution peaking at {approx}287 nm with an absorption of {approx}1% of the band maximum. The data for the i-C{sub 3}H{sub 7}+I* {sup 2}P{sub 1/2} channel display a smooth behavior across the full energy range of the present study, and are consistent with direct excitation to the {sup 3}Q{sub 0{sup +}} surface followed by dissociation on that surface.},

  doi          = {10.1063/1.3094321},

  url          = {https://www.osti.gov/biblio/952926},
  journal      = {J. Chem. Phys.},

  issn         = {0021-9606},

  number       = Apr. 7. 2009,

  volume       = 130,

  place        = {United States},

  year         = {Tue Apr 07 00:00:00 EDT 2009},

  month        = {Tue Apr 07 00:00:00 EDT 2009}

}

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