Interaction of Low-Molecular Compounds with Nanoclusters: Thermodynamics, Relationship with Dielectric Permittivity and Polarizability of Molecules, Magic Numbers, Research Prospects

• Published in: Russian Journal of Physical Chemistry A 2022-06, Vol.96 (6), p.1163-1169
• Main Authors: Ostroushko, A. A., Terziyan, T. V., Rzhannikova, A. P., Adamova, L. V., Grzhegorzhevskii, K. V., Tonkushina, M. O.
• Format: Article
• Language: English
• Subjects: Boiling points; Chemistry; Chemistry and Materials Science; Enthalpy; Inorganic compounds; Melting points; Nanoclusters; Organic compounds; Permittivity; Physical Chemistry; Polyoxometallates; XIV International Scientific Conference “Problems of Solvation and Complex Formation in Solutions”
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024422060164

The enthalpies of interactions of various organic compounds with nanocluster molybdenum-containing polyoxometalates have been studied experimentally. Substances with dielectric permittivity varying within a wide range were chosen. The dependence of enthalpy was found to be sign-variable, with a transition from endothermal to exothermal effects in the range of permittivity 15–17. Similar tendencies with an extremum or inflection at permittivity of 15–17 were found for a number of reference physicochemical parameters (boiling and melting points, enthalpies of these processes, enthalpy of formation, viscosity, heat capacity) of a wide range of organic and some inorganic compounds. The general nature of these tendencies may be a basis for further development of modern concepts about the mechanisms of intermolecular interaction.