The ultrafast dynamics of water molecules excited to the two F states is studied by combining two-photon excitation and time-resolved photoelectron imaging techniques. The lifetimes of the F1A1 and F1B1 states of H2O ...The ultrafast dynamics of water molecules excited to the two F states is studied by combining two-photon excitation and time-resolved photoelectron imaging techniques. The lifetimes of the F1A1 and F1B1 states of H2O (D2O) were derived to be 1.0±0.3 (1.9±0.4) and 10±3 (30±10) ps, respectively. We propose that the F1A1 state mainly decays through the D state, due to the nonadiabatic coupling between them, while the F1B1 state decays through the F1A1 state via Coriolis interaction.展开更多
Two pyrromethene BF 2 complexes are synthesized. Their structures have been comfirmed by IR spectra, 1H NMR spectra, mass spectra and elementary analysis. Sol gel method was used to dope these dyes in organic modified...Two pyrromethene BF 2 complexes are synthesized. Their structures have been comfirmed by IR spectra, 1H NMR spectra, mass spectra and elementary analysis. Sol gel method was used to dope these dyes in organic modified silicate (Ormosil). Their UV vis spectra, fluorescence spectra and photostability have also been tested.展开更多
基金supported by the National Natural Science Foundation of China (No.21573228, No.21833003, No.21673232, and No.21773236)the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDB17000000)
文摘The ultrafast dynamics of water molecules excited to the two F states is studied by combining two-photon excitation and time-resolved photoelectron imaging techniques. The lifetimes of the F1A1 and F1B1 states of H2O (D2O) were derived to be 1.0±0.3 (1.9±0.4) and 10±3 (30±10) ps, respectively. We propose that the F1A1 state mainly decays through the D state, due to the nonadiabatic coupling between them, while the F1B1 state decays through the F1A1 state via Coriolis interaction.
文摘Two pyrromethene BF 2 complexes are synthesized. Their structures have been comfirmed by IR spectra, 1H NMR spectra, mass spectra and elementary analysis. Sol gel method was used to dope these dyes in organic modified silicate (Ormosil). Their UV vis spectra, fluorescence spectra and photostability have also been tested.
