Salt Solutions of Molecular Containers of Cucurbiturils: Relationship Between the Characteristics of Cationic Complexes and Adsorbate Layers with Their Participationстатья
Статья опубликована в журнале из списка Web of Science и/или Scopus
Аннотация:An analysis of the impedance data for the Hg-electrode/salt solutions interface of molecular containers of cucurbiturils containing their supramolecular cationic complexes was carried out. The need to study the properties of such systems is determined by their practical use in the field of supramolecular chemistry, medicine, biochemistry, and nanotechnology. The formation of two types of adsorption layers and a significant change in the adsorption behavior with a change in the initial concentrations of the system components and the electrode potential were established. It was shown that the observed changes are due to a change in the concentration of free molecules of cucurbiturils not involved in complex formation. The high sensitivity of the impedance measurement data to this parameter found this way made it possible to establish the corresponding quantitative dependences for systems with known values of the strength constants for complexes of inorganic cations with cucurbiturils. It was shown that for systems close in nature, this opens up the possibility of finding previously unknown strength constants of cationic cucurbiturils complexes when analyzing impedance measurement data. The work showed the applicability of the proposed method for determining the strength constants of supramolecular cationic cucurbiturils complexes, which can be an alternative to more complex and time-consuming methods. Keywords: cucurbiturils, cationic complexes, stability constants
