Raman Scattering Study of Sodium Di-n-pentyl Phosphate Aggregates and Water Content Dependence of Conformation about P-O Bonds in Coagel Phases

Article abstract of DOI:10.1021/j100173a069

For anhydrous sodium di-n-pentyl phosphate (DPP) in the solid state and the DPP-H2O system, the Raman scattering spectra due to the according vibration mode were investigated in the temperature range -80-100 deg C.For anhydrous DPP, the GG form about the P-O bonds was stabilized at lower temperatures.In the coagel phases of DPP-H2O, preferential stabilization of a specific rotational isomer about the P-O bonds occurred and the species of stabilized conformer was dependent on the water content; for the 7:3 DPP-H2O coagel the TT form was stabilized, while for the 8:2 DPP-H2O coagel the GT form was preferentially stabilized.The stabilization of such a specific conformer was also reflected in some conformationally sensitive Raman bands in the higher frequency region.