Abstract
Barium ethyl(alkyl)phosphates, as new simple surfactants ((C2H5O)(RO)-PO −2 )2Ba2+ with various chain length ofR, were synthesized. The infrared spectra in the CH stretching region were measured for these surfactants in the solid state and in aqueous solution, and assignments were made. In particular, the ordering and environment of octyl chains in the different phases of the barium ethyl(octyl)phosphate-water system were studied by the Fourier-transform-infrared and Raman spectra. The CH stretching bands in the infrared spectra reflected the ordering and environment of octyl chains in each phase. The Raman band connected to the PO −2 symmetric stretching mode was sensitively shifted. This was caused by the change of aggregation structures with different Ba2+...PO −2 interaction. The infrared band arising from the PO −2 antisymmetric stretching mode was insensitive to the phase structures. The C−C stretching region in the infrared spectra was used to discuss the ordering of each phase.
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Miyagai, K., Taga, K., Yoshida, T. et al. Infrared and raman studies on the phase structure of barium ethyl(octyl)phosphate-water system. Colloid Polym Sci 269, 153–160 (1991). https://doi.org/10.1007/BF00660305
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DOI: https://doi.org/10.1007/BF00660305