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The Fluorobenzene-Argon S1 Excited-State Intermolecular Potential Energy Surface

机译:氟苯-氩S1激发态分子间势能面

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We evaluate the first excited-state (S1) intermolecular potential energy surface for the fluorobenzene-Ar van der Waals complex using the coupled cluster method and the augmented correlation-consistent polarized valence double-zeta basis set extended with a set of 3s3p2dlf lg midbond functions.To calculate the S1 interaction energies,we use ground-state interaction energies evaluated with the same basis set and the coupled cluster singles and doubles (CCSD) including connected triple excitations [CCSD(T)] model and interaction and excitation energies evaluated at the CCSD level.The surface minima are characterized by the Ar atom located above and below the fluorobenzene ring at a distance of 3.5060 A with respect to the fluorobenzene center of mass and at an angle of 5.89° with respect to the axis perpendicular to the fluorobenzene plane.The corresponding interaction energy is -425.226 cm~(-1).The surface is used in the evaluation of the intermolecular level structure of the complex,and the results are compared to the experimental data available and to those found in previous theoretical papers on ground-state potentials for similar complexes.
机译:我们使用耦合簇方法和增强的相关一致极化价双-zeta基集评估了氟苯-Ar van der Waals配合物的第一激发态(S1)分子间势能面,并扩展了一组3s3p2dlf lg中键函数为了计算S1相互作用能,我们使用在相同基集和耦合簇单双态(CCSD)评估的基态相互作用能,其中包括连接的三重激发[CCSD(T)]模型,以及在相互作用下评估的相互作用能和激发能。 CCSD等级。表面最小值的特征是Ar原子位于氟苯环的上方和下方,相对于氟苯质心的距离为3.5060 A,相对于垂直于氟苯平面的轴的夹角为5.89°相应的相互作用能为-425.226 cm〜(-1)。该表面用于评价配合物的分子间能级结构。 d将结果与可用的实验数据进行比较,并与以前的理论论文中有关类似配合物基态电势的结果进行比较。

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