EFFECT OF TETRAPHENYLPHOSPHONIUM AND TETRAPHENYLBORATE IONS ON THE WATER-STRUCTURE IN AQUEOUS-SOLUTIONS - FTIR STUDIES OF HDO SPECTRA

FTIR spectroscopy has been used to study interactions of Ph4B- and Ph4 P+ ions with water in aqueous solutions. The effect of Ph4BNa and Ph4P Cl on the HDO vibration band in the fundamental region has been invest igated. A new modification of the difference spectra method has been a pplied for the analysis of the spectral data. The results have reveale d distinct differences in hydration of Ph4B- and Ph4P+ ions: Ph4B- ion strongly decreases the hydrogen-bond energy of surrounding water mole cules, while Ph4P+ ion changes it slightly. The effect of Ph4B- is det ermined by anion-water interactions, while the effect of Ph,PC is dete rmined by water-water interactions around the cation. The changes in t he energy of water hydrogen bonds upon the ions have been evaluated.