Association of rhodamine cations with tetraphenylborate-anion in aqueous solution: structural properties of ions and stability of associates

Shapovalov S.A
Institute of Chemistry, V. N. Karazin Kharkiv National University, Kharkiv, 61022, Ukraine


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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.


  • Dyes,
  • Rhodamines,
  • Aqueous solution,
  • Association,
  • Hydrophobicity,
  • Enthalpy of hydration
  • ...More


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Article Details

Volume 3, Issue 2, Year 2021

Published 2021-09-28


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How to Cite

S.A, S. (2021). Association of rhodamine cations with tetraphenylborate-anion in aqueous solution: structural properties of ions and stability of associates. Bulletin of Scientific Research, 3(2), 1–8.