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Enhancing reactivity of SiO+ ions by controlled excitation to extreme rotational states

Author

Listed:
  • Sruthi Venkataramanababu

    (Northwestern University
    Northwestern University)

  • Anyang Li

    (Northwest University)

  • Ivan O. Antonov

    (Lebedev Physical Institute)

  • James B. Dragan

    (Northwestern University)

  • Patrick R. Stollenwerk

    (Argonne National Laboratory)

  • Hua Guo

    (University of New Mexico)

  • Brian C. Odom

    (Northwestern University)

Abstract

Optical pumping of molecules provides unique opportunities for control of chemical reactions at a wide range of rotational energies. This work reports a chemical reaction with extreme rotational excitation of a reactant and its kinetic characterization. We investigate the chemical reactivity for the hydrogen abstraction reaction SiO+ + H2 → SiOH+ + H in an ion trap. The SiO+ cations are prepared in a narrow rotational state distribution, including super-rotor states with rotational quantum number (j) as high as 170, using a broad-band optical pumping method. We show that the super-rotor states of SiO+ substantially enhance the reaction rate, a trend reproduced by complementary theoretical studies. We reveal the mechanism for the rotational enhancement of the reactivity to be a strong coupling of the SiO+ rotational mode with the reaction coordinate at the transition state on the dominant dynamical pathway.

Suggested Citation

  • Sruthi Venkataramanababu & Anyang Li & Ivan O. Antonov & James B. Dragan & Patrick R. Stollenwerk & Hua Guo & Brian C. Odom, 2023. "Enhancing reactivity of SiO+ ions by controlled excitation to extreme rotational states," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40135-x
    DOI: 10.1038/s41467-023-40135-x
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    References listed on IDEAS

    as
    1. Yu Liu & Ming-Guang Hu & Matthew A. Nichols & Dongzheng Yang & Daiqian Xie & Hua Guo & Kang-Kuen Ni, 2021. "Precision test of statistical dynamics with state-to-state ultracold chemistry," Nature, Nature, vol. 593(7859), pages 379-384, May.
    2. Yuri Khodorkovsky & Uri Steinitz & Jean-Michel Hartmann & Ilya Sh. Averbukh, 2015. "Collisional dynamics in a gas of molecular super-rotors," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    3. Ivan O. Antonov & Patrick R. Stollenwerk & Sruthi Venkataramanababu & Ana P. Lima Batista & Antonio G. S. Oliveira-Filho & Brian C. Odom, 2021. "Precisely spun super rotors," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
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