Ultrafast decay dynamics of water molecules excited to electronic (D)over-tilde' and (D)over-tilde '' states: a time-resolved photoelectron spectroscopy study
Ultrafast decay dynamics of water molecules excited to electronic (D)over-tilde' and (D)over-tilde '' states: a time-resolved photoelectron spectroscopy study
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激发到电子 (D)over-tilde' 和 (D)over-tilde '' 态的水分子超快衰变动力学：时间分辨光电子能谱研究
DOI：
10.1039/c9cp01644a
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发表时间：
2019
影响因子：
3.3
通讯作者：
Yang Xueming
中科院分区：
文献类型：
--
作者：
Min Yanjun;Yang Dongyuan;He Zhigang;Chen Zhichao;Yuan Kaijun;Dai Dongxu;Wu Guorong;Yang Xueming
采用双光子激发和时间分辨光电子成像相结合的方法研究了水分子激发到′1B1和′′1A2态的超快衰变动力学。H2O（D2O）的′1B1（000）态的寿命为1.54 ± 0.1（22.6 ± 1.6）ps，与以前的高分辨光谱研究结果一致。H2O "1A2（000）态的衰变寿命为4.1 ± 0.2 ps，而D2O" 1A2（000）态有两条独立的衰变路径，衰变时间常数分别为0.55 ± 0.1和13 ± 1 ps。前者被认为是与一个迄今为止没有记载的′′ →途径，诱导科里奥利相互作用。
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.