| Abstract: | Hydrogen bonding between water and tributyl phosphate (TBP) in TBP? CCl4? H2O system has been studied by 1H NMR. A new model and an empirical equation have been established on the basis of Li's model and the parameters of hydrogen bond between water and TBP are determined by nonlinear optimization method. In TBP? CCl4? H2O system change of 1H chemical shift of water can be satisfactorily explained by the new model and the empirical equation in the whole concentration range. When the concentration of water in the organic phase is very low, the main existing forms of water are H2O · TBP and H2O · 2TBP. When the concentration of water reaches saturation, the main existing form is associated water, but there are still about 20% of water existing in the forms of H2O · TBP and H2O · 2TBP. |
