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Hydroxyl super rotors from vacuum ultraviolet photodissociation of water

Author

Listed:
  • Yao Chang

    (Chinese Academy of Sciences
    University of Science and Technology of China)

  • Yong Yu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Heilong Wang

    (Chinese Academy of Sciences
    Dalian Maritime University)

  • Xixi Hu

    (Nanjing University)

  • Qinming Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jiayue Yang

    (Chinese Academy of Sciences)

  • Shu Su

    (Chinese Academy of Sciences)

  • Zhigang He

    (Chinese Academy of Sciences)

  • Zhichao Chen

    (Chinese Academy of Sciences)

  • Li Che

    (Dalian Maritime University)

  • Xingan Wang

    (University of Science and Technology of China)

  • Weiqing Zhang

    (Chinese Academy of Sciences)

  • Guorong Wu

    (Chinese Academy of Sciences)

  • Daiqian Xie

    (Nanjing University)

  • Michael N. R. Ashfold

    (University of Bristol)

  • Kaijun Yuan

    (Chinese Academy of Sciences)

  • Xueming Yang

    (Chinese Academy of Sciences
    Southern University of Science and Technology)

Abstract

Hydroxyl radicals (OH) play a central role in the interstellar medium. Here, we observe highly rotationally excited OH radicals with energies above the bond dissociation energy, termed OH “super rotors”, from the vacuum ultraviolet photodissociation of water. The most highly excited OH(X) super rotors identified at 115.2 nm photolysis have an internal energy of 4.86 eV. A striking enhancement in the yield of vibrationally-excited OH super rotors is detected when exciting the bending vibration of the water molecule. Theoretical analysis shows that bending excitation enhances the probability of non-adiabatic coupling between the $$\tilde B$$ B ̃ and $$\tilde X$$ X ̃ states of water at collinear O–H–H geometries following fast internal conversion from the initially excited $$\tilde D$$ D ̃ state. The present study illustrates a route to produce extremely rotationally excited OH(X) radicals from vacuum ultraviolet water photolysis, which may be related to the production of the highly rotationally excited OH(X) radicals observed in the interstellar medium.

Suggested Citation

  • Yao Chang & Yong Yu & Heilong Wang & Xixi Hu & Qinming Li & Jiayue Yang & Shu Su & Zhigang He & Zhichao Chen & Li Che & Xingan Wang & Weiqing Zhang & Guorong Wu & Daiqian Xie & Michael N. R. Ashfold &, 2019. "Hydroxyl super rotors from vacuum ultraviolet photodissociation of water," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09176-z
    DOI: 10.1038/s41467-019-09176-z
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    Cited by:

    1. Yao Chang & Feng An & Zhichao Chen & Zijie Luo & Yarui Zhao & Xixi Hu & Jiayue Yang & Weiqing Zhang & Guorong Wu & Daiqian Xie & Kaijun Yuan & Xueming Yang, 2021. "Vibrationally excited molecular hydrogen production from the water photochemistry," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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