Ion momentum imaging study of the ion–molecule reaction Ar+ + O2 → Ar + O2+

Wu, Chun-Xiao; Hu, Jie; He, Miao-Miao; Zhi, Yaya; Tian, Shan Xi

doi:10.1039/c9cp06289k

Cited by 13 publications

(34 citation statements)

References 21 publications

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“…They represent a simple reaction that occurs through the exchange of an electron, but can exhibit quite intricate mechanisms [1,2]. This becomes evident in a multitude of CONTACT R. Wester roland.wester@uibk.ac.at previously studied charge transfer reactions [3][4][5][6][7][8][9][10][11][12][13]. One particularly interesting one is the reaction of Ar + ( 2 P J ) with the diatomic CO molecule; a reaction that has been studied for almost six decades .…”

Section: Introductionmentioning

confidence: 99%

“…We have obtained differential cross sections for the title reaction by using our ion-molecule crossed beam velocity map imaging setup at the two collision energies 0.55 and 0.74 eV, bridging the gap between earlier studies at thermal and the recent study at higher collision energies. This experimental method has proven to be capable of disentangling the internal product energy distribution in numerous charge transfer reactions [3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Charge transfer dynamics in Ar⁺ + CO

et al. 2020

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Differential cross sections for the charge transfer reaction between Ar + and CO have been measured using three-dimensional velocity map imaging in a crossed beam setup at the two relative collision energies 0.55 and 0.74 eV. We find dominant forward scattering with CO + product ions predominantly in the vibrational levels ν = 6,7 of the electronic ground state X 2 + . This is indicative of a direct resonant mechanism for the two argon spin-orbit states. At both collision energies also an isotropic distribution with product ions exhibiting high internal excitation is observed. This is more pronounced at the higher collision energy, where the first electronically excited state A 2 + becomes accessible. We conclude that the A-state is partially populated by the product ions at 0.74 eV collision energy and suggest that the isotropic distribution stems from the formation of a charge-transfer complex, in concurrence with previously performed studies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Charge transfer dynamics in Ar⁺ + CO

et al. 2020

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“…Recently, our three-dimensional ion velocity map imaging (3D-VMI) study indicates that the homonuclear diatomic molecule O 2 can be aligned or parallelized along the collision axis in the dissociative charge exchange (DCE) reaction Ar + + O 2 → Ar + O + O + at the collision energies from 3.95 to 6.65 eV in the collisional center-of-mass (c.m.) coordinante, but this stereodynamics phenomenon was not observed in the charge exchange reaction Ar + + O 2 → Ar + O 2 + . The angular distribution of the forward-scattered O 2 + became wider with the increase of collision energy ( E c.m.…”

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confidence: 92%

“…Using our 3D-VMI apparatus, ,, the momentum or velocity distributions of the C + products in three-dimensional space are recorded at the collision energies E c.m. = 7.46, 8.39, 9.21, and 9.97 eV, respectively.…”

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confidence: 99%

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Collision-Energy Dependent Stereodynamics of Dissociative Charge Exchange Reaction between Ar⁺ and CO

Zhi

Xie

et al. 2021

J. Phys. Chem. Lett.

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Long-distance charge−dipole attraction between atomic ion and randomly oriented polar molecule potentially makes the molecular orientation, which profoundly influences the products' kinetics of collisional reaction. Using the three-dimensional ion velocity map imaging technique, here we report a collision-energy dependent stereodynamics of dissociative charge exchange reaction Ar + + CO → Ar + O + C + in a range of 7.46−9.97 eV. At the lowest collision energy, the most C + products are forward-scattered and are along the collision axis and are attributed to three different dissociation channels including the predominant one experiencing the rotating intermediate ArC + . At the high collision energies, the remarkably diffusive distribution of C + arises from the prompt dissociation of the rebounded CO + . The different dynamic processes arising from the nearly collinear collision are elaborated explicitly on the basis of the data analyses using the Doppler kinetics models.

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Collision-Energy Dependence of the Ion–Molecule Charge-Exchange Reaction Ar⁺ + CO → Ar + CO⁺

et al. 2020

J. Phys. Chem. A

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Ion–molecule charge-exchange reactions Ar+ + CO → Ar + CO+ at the center-of-mass collision energies of 4.40, 6.40, and 8.39 eV are investigated using ion velocity map imaging technique. Although multiple electronically excited states of CO+ are accessed, the population of CO+ at the A2Π state is predominant in the present collision-energy range. In contrast to our previous study for NO, but similar to the case of O2, the forward-scattered CO+ yields show a broader angular distribution at the higher collision energy. Typically, the Franck–Condon-region charge transfer, energy resonant charge transfer, and intimate collision are three different mechanisms in which the intimate collision experiences an intermediate complex, and this mechanism usually plays an essential role in the thermal-energy reactions. However, the present observations indicate that this mechanism, concerning the intermediate (Ar–CO)+, is still of utmost importance in a relatively high collision-energy range.

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Ion momentum imaging study of the ion–molecule reaction Ar⁺ + O₂ → Ar + O₂⁺

Abstract: O2+ products of the charge exchange reactions between Ar+ and O2 are distributed in the wider range of scattering angle at higher collision energy.

Cited by 13 publications

References 21 publications

Charge transfer dynamics in Ar⁺ + CO

Charge transfer dynamics in Ar⁺ + CO

Collision-Energy Dependent Stereodynamics of Dissociative Charge Exchange Reaction between Ar⁺ and CO

Collision-Energy Dependence of the Ion–Molecule Charge-Exchange Reaction Ar⁺ + CO → Ar + CO⁺

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Ion momentum imaging study of the ion–molecule reaction Ar+ + O2 → Ar + O2+

Abstract: O2+ products of the charge exchange reactions between Ar+ and O2 are distributed in the wider range of scattering angle at higher collision energy.

Cited by 13 publications

References 21 publications

Charge transfer dynamics in Ar+ + CO

Charge transfer dynamics in Ar+ + CO

Collision-Energy Dependent Stereodynamics of Dissociative Charge Exchange Reaction between Ar+ and CO

Collision-Energy Dependence of the Ion–Molecule Charge-Exchange Reaction Ar+ + CO → Ar + CO+

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Ion momentum imaging study of the ion–molecule reaction Ar⁺ + O₂ → Ar + O₂⁺

Charge transfer dynamics in Ar⁺ + CO

Charge transfer dynamics in Ar⁺ + CO

Collision-Energy Dependent Stereodynamics of Dissociative Charge Exchange Reaction between Ar⁺ and CO

Collision-Energy Dependence of the Ion–Molecule Charge-Exchange Reaction Ar⁺ + CO → Ar + CO⁺