Buldakov Mikhail A. - Interaction-induced Electric Properties of van der Waals Complexes

The Author(s) 2017

Victor N. Cherepanov 1 , Yulia N. Kalugina 1 and Mikhail A. Buldakov 2

Van der Waals complexes. Well-known, that all atoms and molecules can interact together to form either a new molecule or a molecular cluster []. As a result, the van der Waals complexes are intensively studied in the last decades. And in the book some aspects of electrical properties of van der Waals complexes, which are not delighted enough in scientific literature, are discussed.

Classification of intermolecular interactions. In this small book the two-body interactions, which are the strongest, are only considered for study the electrical properties of van der Waals complexes. Particularities of many-body interactions may be found, for example, in []. Usually, the intermolecular interactions, the physical nature of which is electromagnetic one, are classified according to the distance R between interacting molecules (or atoms). They are the long-range interactions when the interaction energy has a form and the short-range interactions . The main long-range contributions to the energy and electric properties of interacting molecules are as follows: electrostatic (multipole-multipole), polarization (induction and dispersion), resonance, relativistic, magnetic and retardation. The short-range interactions include the direct electrostatic, exchange, repulsion, change transfer effects. Note that the long-range interactions can be well described in an analytical form using classical electrodynamics for some approximation of the perturbation theory. In turn, for short distances the methods of quantum chemistry are only effective. In part of analytical theory for large R this book will only focus on interaction-induced theory.

The Author(s) 2017

Victor N. Cherepanov 1 , Yulia N. Kalugina 1 and Mikhail A. Buldakov 2

At present, a lot of fine manuals and books may be recommended to study the theoretical backgrounds of interaction of atoms and molecules [], however, that is a special topic. In the short book it is not possible to describe in details the modern interaction-induced theory of molecules. Nevertheless, the general backgrounds of this theory are needed to be given to facilitate the reading of the book. In the next sections of this chapter some main definitions and formulas used in the book are given.