Vibrational energy flow within excited electronic states of large molecules
Vibrational energy flow within excited electronic states of large molecules
复制标题
大分子激发电子态内的振动能量流
DOI：
10.1021/j100207a001
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
C. Parmenter
中科院分区：
文献类型：
--
作者：
C. Parmenter
描述了大型多原子硅态中碰撞诱导和无碰撞振动能量流的实验方法，并讨论了主要发现。这些研究使用窄带激发来激发单Si振动能级或窄Sj区，并利用短的电子态寿命来控制碰撞相互作用的程度。各种类型的S^ Sq电子光谱（高分辨率吸收，稳态荧光光谱，时间分辨荧光光谱）监测激发态振动种群和能级相互作用。在S4歧管中，由碰撞引起的层间流动很低。从中间区域，实验监测碰撞引起的振动能量流进入邻近的振动态密集场。从更高的层次上，无碰撞的振动再分布可以用非常直接的探针跟踪。
The experimental approaches toboth collision-induced and collision-free vibrational energy flow within Si states of large polyatomics are described along with discussions of the principal findings. The studies use narrow-band excitation to excite single Si vibrational levels or narrow Sj regions and take advantage of the short electronic state lifetimes to control the extent of collisional interactions. Various types of S^ Sq electronic spectroscopies (high-resolution absorption, steady-state fluorescence spectra, time-resolved fluorescence spectra) monitor excited-state vibrational populations and level interactions. Collision-induced level-to-level flow can be seen low in the S4 manifold. From intermediate regions, experiments monitor the collision-induced flow of vibrational energy into the neighboring dense field of vibrational states. From higher levels, collision-free vibrational redistribution can be followed with remarkably direct probes.