The influence of the molecular beam temperature on the photodissociation of CF3I at 308 nm

Felder, P.

doi:10.1016/0009-2614(92)85795-c

Cited by 25 publications

(37 citation statements)

References 15 publications

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“…15 According to this model, the curve-crossing probability monotonically decreases with υ. In photodissociation of CF3I at 248 and 304 nm, 33,34 qualitative agreement was found between this model and the experimental findings (P down = 0.035 at 304 nm and 0.4 at 248 nm). In the case of C 2 H 4 -BrCl, however, this model is not in agreement with the experimental findings.…”

Section: Discussionsupporting

confidence: 82%

Photodissociation Dynamics of C₂H₄BrCl: Nonadiabatic Dynamics with Intrinsic C_sSymmetry

Lee

Paul

Hong

et al. 2009

Bulletin of the Korean Chemical Society

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The photodissociation dynamics of 1,2-bromochloroethane (C2H4BrCl) was investigated near 234 nm. A two-dimensional photofragment ion-imaging technique coupled with a [2+1] resonance-enhanced multiphoton ionization scheme was utilized to obtain speed and angular distributions of the nascent Br( 2 P3/2) and Br * ( 2 P1/2) atoms. The total translational energy distributions for the Br and Br * channels were well characterized by Gaussian functions with average translational energies of 100 and 84 kJ/mol, respectively. The recoil anisotropies for the Br and Br * channels were measured to be β = 0.49 ± 0.05 for Br and 1.55 ± 0.05 for Br * . The relative quantum yield for Br * was found to be ΦBr* = 0.33 ± 0.03. The probability of nonadiabatic transition between A' states was estimated to be 0.46. The relevant nonadiabatic dynamics is discussed in terms of interaction between potential energy surfaces in Cs symmetry.Key Words: Photodissociation dynamics, Alkyl halides, Curve-crossing, Cs symmetry, Ion-imaging

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Section: Discussionsupporting

confidence: 82%

Photodissociation Dynamics of C₂H₄BrCl: Nonadiabatic Dynamics with Intrinsic C_sSymmetry

Lee

Paul

Hong

et al. 2009

Bulletin of the Korean Chemical Society

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“…4,15,28,32 This finding indicates that there are significant vibrational excitations of fragments which are in agreements with observed f T values. To unravel the relationship 33 between the vibrational excitation of the products and the shape of the related potential energy surfaces involved in the photodissociation of C 3 H 5 Br and C 4 H 7 Br, further theoretical investigation is in progress.…”

supporting

confidence: 86%

Photodissociation of C₃H₅Br and C₄H₇Br at 234 nm

Kim

Paul

Hong

et al. 2012

Bulletin of the Korean Chemical Society

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The photodissociation dynamics of cyclopropyl bromide (C3H5Br) and cyclobutyl bromide (C4H7Br) at 234 nm was investigated. A two-dimensional photofragment ion-imaging technique coupled with a [2+1] resonanceenhanced multiphoton ionization scheme was utilized to obtain speed and angular distributions of the nascent Br( 2 P3/2) and Br * ( 2 P1/2) atoms. The recoil anisotropies for the Br and Br * channels were measured to be βBr = 0.92 ± 0.03 and βBr* = 1.52 ± 0.04 for C3H5Br and βBr = 1.10 ± 0.03 and βBr* = 1.49 ± 0.05 for C4H7Br. The relative quantum yield for Br was found to be ΦBr = 0.13 ± 0.03 and for C3H5Br and C4H7Br, respectively. The soft radical limit of the impulsive model adequately modeled the related energy partitioning. The nonadiabatic transition probability from the 3A' and 4A' potential energy surfaces was estimated and discussed.

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“…The relative contributions of the three excited states to the absorption in the A-bands of methyl halides have been resolved by magnetic circular dichroism ͑MCD͒. 10,11 Many experimental [12][13][14][15][16][17] and theoretical 18 -22,24 studies have investigated the photodissociation of CH 3 I. A noteworthy conclusion drawn in these studies is that nonadiabatic dynamics plays an important role in the photodissociation process.…”

Section: Introductionmentioning

confidence: 98%

Photodissociation dynamics of CF3Br at 234 nm: An implication of symmetry reduction during photodissociation

Kim

Park

Lee

et al. 2001

The Journal of Chemical Physics

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The photodissociation dynamics of CF3Br in the A-band has been investigated utilizing a two-dimensional photofragment ion-imaging technique coupled with a state-selective resonance-enhanced multiphoton ionization scheme. The total translational energy distributions for the Br(2P3/2) and Br*(2P1/2) channels are well characterized by Gaussian functions with average translational energies of 183 and 151 kJ/mol, respectively. The recoil anisotropies were measured to be β=0.66 for Br and 1.83 for Br*. It was found that Br* production is preferred, with a relative quantum yield of 0.80. The reduction in the recoil anisotropy for Br results from nonadiabatic coupling between the Q11 and Q03 states. The fraction of molecules that dissociate via a distorted pathway induced by symmetry reduction from C3v to Cs is estimated to be 0.11.

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The influence of the molecular beam temperature on the photodissociation of CF3I at 308 nm

Cited by 25 publications

References 15 publications

Photodissociation Dynamics of C₂H₄BrCl: Nonadiabatic Dynamics with Intrinsic C_sSymmetry

Photodissociation Dynamics of C₂H₄BrCl: Nonadiabatic Dynamics with Intrinsic C_sSymmetry

Photodissociation of C₃H₅Br and C₄H₇Br at 234 nm

Photodissociation dynamics of CF3Br at 234 nm: An implication of symmetry reduction during photodissociation

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The influence of the molecular beam temperature on the photodissociation of CF3I at 308 nm

Cited by 25 publications

References 15 publications

Photodissociation Dynamics of C2H4BrCl: Nonadiabatic Dynamics with Intrinsic CsSymmetry

Photodissociation Dynamics of C2H4BrCl: Nonadiabatic Dynamics with Intrinsic CsSymmetry

Photodissociation of C3H5Br and C4H7Br at 234 nm

Photodissociation dynamics of CF3Br at 234 nm: An implication of symmetry reduction during photodissociation

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Photodissociation Dynamics of C₂H₄BrCl: Nonadiabatic Dynamics with Intrinsic C_sSymmetry

Photodissociation Dynamics of C₂H₄BrCl: Nonadiabatic Dynamics with Intrinsic C_sSymmetry

Photodissociation of C₃H₅Br and C₄H₇Br at 234 nm