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Aggregation behavior and catalytic activity of systems based on calix[4]resorcinarene derivatives and surfactants. 1. Mixed micellization of aminomethylated calix[4]resorcinarenes with cetyltrimethylammonium bromide in aqueous dimethylformamide |
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| Authors: | Ryzhkina I S Pashirova T N Filippova Kudryavtseva L A Timosheva A P Arkhipov V P Idiyatullin Z Sh Popova E V Burilov A R Konovalov A I |
| Institution: | (1) Kazan Research Center of the Russian Academy of Sciences, 8 ul. Akad. Arbuzova, 420088 Kazan, Russian Federation. Fax;(2) Kazan State Technological University, 68 ul. K. Marksa, 420015 Kazan, Russian Federation |
| Abstract: | Mixed micellization of amphiphilic aminomethylated calix4]resorcinarenes and phenols, which are their structural units, with the cationic surfactant cetyltrimethylammonium bromide (CTAB) in aqueous 10—70 vol % DMF decreases the critical micelle concentration; the resulting aggregates are larger than those in the CTAB—DMF—water systems. The micellization of CTAB with aminomethylated calix4]resorcinarenes proceeds in two steps, while its micellization with phenols is a single-step process. The micellization characteristics depend on the structure and hydrophobicity of the amphiphilic compound and the concentration of DMF. |
| Keywords: | micellization mixed micelles critical micelle concentrations amphiphilic compounds surfactant aminomethylated calix[4]resorcinarene o-aminomethylphenol cetyltrimethylammonium bromide |
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