State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
J Chem Phys. 2011 Jun 21;134(23):234301. doi: 10.1063/1.3600334.
The dynamics of electronically excited states in 2-picoline is studied using femtosecond time-resolved photoelectron imaging spectroscopy. The internal conversion from the S(2) state to the vibrationally excited S(1) state is observed in real time. The secondarily populated high vibronic S(1) state deactivates further to the S(0) state. Photoelectron energy and angular distributions reveal the feature of ionization from the singlet 3p Rydberg states. In addition, variation of time-dependent anisotropy parameters indicates the rotational coherence of the molecule.
利用飞秒时间分辨光电子成像光谱技术研究了 2-吡啶中电子激发态的动力学。实时观察到 S(2)态到振动激发的 S(1)态的内转换。随后，二次填充的高振动态 S(1)态进一步失活到 S(0)态。光电子能量和角分布揭示了从单重态 3p Rydberg 态离化的特征。此外，时变各向异性参数的变化表明了分子的旋转相干性。
