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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Ultrafast excited-state dynamics at a conical intersection: the role of environmental effects
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Ultrafast excited-state dynamics at a conical intersection: the role of environmental effects

机译:圆锥形相交处的超快激发态动力学:环境效应的作用

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We review some of the concepts which we have recently developed in order to describe the influence of an environment on the ultrafast dynamical events at a conical intersection (CI). In particular, we propose a description in terms of effective environmental modes, which accurately account for the short-time dynamics at the conical intersection. We address the construction of these modes (i) for intramolecular situations, where the modes in question result from an orthogonal coordinate transformation for the overall N-mode system, and (ii) for solute-solvent interactions in polar solvents, where a description in terms of a Marcus-like solvent coordinate is obtained. In both cases, the dynamical process is determined by the combined evolution of the internal molecular modes and the environmental coordinates, on an ultrafast timescale. We discuss examples related to an intramolecular multi-mode situation in pyrazine, and the polar solvation dynamics for protonated Schiff bases.
机译:我们回顾一些我们最近开发的概念,以描述环境对圆锥形交叉点(CI)上超快速动力学事件的影响。特别是,我们提出了一种关于有效环境模式的描述,该模式准确地说明了圆锥形交叉口的短时动态。我们讨论了这些模式的构建(i)用于分子内情况,其中所讨论的模式来自整个N模式系统的正交坐标转换,以及(ii)极性溶剂中的溶质-溶剂相互作用,其中获得类似马库斯溶剂坐标的项。在这两种情况下,动力学过程都取决于内部分子模式和环境坐标在超快时间尺度上的共同演化。我们讨论了与吡嗪分子内多模态有关的实例,以及质子化席夫碱的极性溶剂化动力学。

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