Open AccessAssociation of rhodamine cations with tetraphenylborate-anion in aqueous solution: structural properties of ions and stability of associates
Author(s) -
Shapovalov S.A
Publication year - 2021
Publication title -
bulletin of scientific research
Language(s) - English
Resource type - Journals
ISSN - 2582-4678
DOI - 10.34256/bsr2121
Subject(s) - tetraphenylborate , chemistry , aqueous solution , enthalpy , ion association , rhodamine , ion , rhodamine b , inorganic chemistry , molecule , equilibrium constant , thermodynamics , organic chemistry , fluorescence , physics , quantum mechanics , photocatalysis , catalysis
The ability of rhodamine cations to form cation-anionic associates with tetraphenylborate-anion in an aqueous solution has been studied. The thermodynamic values of the equilibrium association constants Kasт were determined spectrophotometrically. The values of a number of properties of dye molecules (surface area, effective volume, hydrophobicity index log P, standard enthalpy of hydration ΔНohydr) were calculated using the QSAR model. The possibility of dependence of the value of Kasт on these factors has been reviewed. It was shown that changes in lg Kasт in the series of rhodamine associates are consistent with changes in the parameters log P and ΔНohydr.