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Issue 27, 2019
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Ultrafast decay dynamics of water molecules excited to electronic [D with combining tilde]′ and [D with combining tilde]′′ states: a time-resolved photoelectron spectroscopy study

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Abstract

The ultrafast decay dynamics of water molecules excited to [D with combining tilde]1B1 and [D with combining tilde]′′1A2 states is studied by combining two-photon excitation and time-resolved photoelectron imaging methods. The lifetime of the [D with combining tilde]1B1(000) state of H2O (D2O) is determined to be 1.54 ± 0.1 (22.6 ± 1.6) ps, consistent with a previous high-resolution spectroscopic study. The H2O [D with combining tilde]′′1A2(000) state decays with a lifetime of 4.1 ± 0.2 ps, while in the D2O [D with combining tilde]′′1A2(000) state, two independent decay pathways are observed, with time constants of 0.55 ± 0.1 and 13 ± 1 ps, respectively. The former is proposed to be associated with a hitherto undocumented [D with combining tilde]′′ → [C with combining tilde] pathway, induced by Coriolis interaction.

Graphical abstract: Ultrafast decay dynamics of water molecules excited to electronic  [[D with combining tilde]] ′ and  [[D with combining tilde]] ′′ states: a time-resolved photoelectron spectroscopy study

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Article information


Submitted
24 Mar 2019
Accepted
14 Jun 2019
First published
15 Jun 2019

Phys. Chem. Chem. Phys., 2019,21, 15040-15045
Article type
Paper

Ultrafast decay dynamics of water molecules excited to electronic [D with combining tilde]′ and [D with combining tilde]′′ states: a time-resolved photoelectron spectroscopy study

Y. Min, D. Yang, Z. He, Z. Chen, K. Yuan, D. Dai, G. Wu and X. Yang, Phys. Chem. Chem. Phys., 2019, 21, 15040
DOI: 10.1039/C9CP01644A

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