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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Transferability of quantum topological atoms in terms of electrostatic interaction energy
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Transferability of quantum topological atoms in terms of electrostatic interaction energy

机译:量子拓扑原子在静电相互作用能方面的转移性

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摘要

Understanding atomic transferability is important to guide the design of a force field. Atoms in molecules are defined and computed according to the theory of quantum chemical topology (QCT). The electron density associated with such topological atoms is conveniently described by high-rank multipole moments. Here, we assess the transferability of atoms by means of their electrostatic interaction energy, using a convergent multipole expansion. The test systems are (H2O)(3) and serine...(H2O)(5). The effect of a varying electron density cutoff (i.e., truncating the atoms) is discussed and the effect of polarization is quantified.
机译:了解原子的可传递性对于指导力场的设计很重要。分子中的原子是根据量子化学拓扑学(QCT)理论定义和计算的。通过高阶多极矩可以方便地描述与此类拓扑原子相关的电子密度。在这里,我们使用会聚的多极膨胀通过原子的静电相互作用能评估原子的可转移性。测试系统为(H2O)(3)和丝氨酸...(H2O)(5)。讨论了变化的电子密度截止(即截断原子)的作用,并量化了极化的作用。

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