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van der Waals Potential: An Important Complement to Molecular Electrostatic Potential in Studying Intermolecular Interactions
Preprints are manuscripts made publicly available before they have been submitted for formal peer review and publication. They might contain new research findings or data. Preprints can be a draft or final version of an author's research but must not have been accepted for publication at the time of submission.
revised on 12.05.2020, 07:21 and posted on 13.05.2020, 10:08by Tian Lu, Qinxue Chen
Electrostatic and van der Waals (vdW) interactions are two major components of intermolecular weak interactions. Electrostatic potential has been a very popular function in revealing electrostatic interaction between the system under study and other species, while the role of vdW potential is less recognized and has long been ignored. In this paper, we explicitly present definition of vdW potential, describe its practical implementation, and demonstrate its important value by visual analysis and comparing it with spatial distribution function obtained via molecular dynamics simulation. We hope this work can arouse researchers' attention to van der Waals potential and promote its application in practical studies of weak interaction. Calculation, visualization and quantitative analysis of the vdW potential have been supported by our freely available code Multiwfn (http://sobereva.com/multiwfn).