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arXiv 1809.04152physics.chem-ph
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溶液中分子的电子激发态模型

Modeling Electronic Excited States of Molecules in Solution

Tim J. Zuehlsdorff, Christine M. Isborn

摘要:

溶剂的存在调节分子的许多性质,例如其基态和激发态几何形状、偶极矩、激发能和吸收光谱。由于系统的能量将根据溶剂配置而变化,因此明确的溶质-溶剂相互作用是理解溶液相反应性和光谱、模拟准确的非均匀加宽和预测吸收光谱的关键。在本教程回顾中,我们给出了一个概述的因素时要考虑的分子与明确的溶剂相互作用的激发态建模。我们为溶质-溶剂构型的取样、溶剂模型的选择、激发态电子结构的计算和光谱线型的计算提供了实用的指导。我们还提出了我们最近的结果相结合的垂直激发能计算从合奏的溶质-溶剂配置与振动光谱从一个小数目的冷冻溶剂配置,从而改善模拟溶液中的分子的吸收光谱。

英文摘要:

The presence of solvent tunes many properties of a molecule, such as its ground and excited state geometry, dipole moment, excitation energy, and absorption spectrum. Because the energy of the system will vary depending on the solvent configuration, explicit solute-solvent interactions are key to understanding solution-phase reactivity and spectroscopy, simulating accurate inhomogeneous broadening, and predicting absorption spectra. In this tutorial review, we give an overview of factors to consider when modeling excited states of molecules interacting with explicit solvent. We provide practical guidelines for sampling solute-solvent configurations, choosing a solvent model, performing the excited state electronic structure calculations, and computing spectral lineshapes. We also present our recent results combining the vertical excitation energies computed from an ensemble of solute-solvent configurations with the vibronic spectra obtained from a small number of frozen solvent configurations, resulting in improved simulation of absorption spectra for molecules in solution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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