The influence of substrate charge and molecular structure on interphase transfer in cloud point extraction systems.
The specificity of interphase transfer of organic reagents of different types between water and the nonionic-surfactant-rich phases at the cloud point temperature was investigated. In contrast to organic solvents, the ability of the micellar phases to extract highly charged ions of organic reagents was shown. Further evidence of the specificity of interphase transfer in micellar-extraction systems is independent and cooperative influence of substrate molecular structure and hydrophobicity on their distribution. The appearance of host-guest phenomenon in cloud point extraction systems that is inherent in organized systems with molecules of the receptors was established. The possibility of describing reagent distribution using regressions that consider substrate hydrophobicity and molecular structure in the cloud point extraction systems was shown.
Analytical Chemistry Department, Faculty of Chemistry, Taras Shevchenko Kyiv University, Volodymyrska Str. 64, Kyiv 01033, Ukraine. doroschuk@univ.kiev.ua
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Doroschuk
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Kulichenko
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Lelyushok