Ultrafast decay dynamics of water molecules excited to electronic ′ and ′′ states: a time-resolved photoelectron spectroscopy study

Literature Information

Publication Date 2019-06-15
DOI 10.1039/C9CP01644A
Impact Factor 3.676
Authors

Zhigang He, Zhichao Chen, Kaijun Yuan, Dongxu Dai, Guorong Wu, Xueming Yang


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Abstract

The ultrafast decay dynamics of water molecules excited to ′1B1 and ′′1A2 states is studied by combining two-photon excitation and time-resolved photoelectron imaging methods. The lifetime of the ′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 ′′1A2(000) state decays with a lifetime of 4.1 ± 0.2 ps, while in the D2O ′′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 ′′ → pathway, induced by Coriolis interaction.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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