Micellar nanocontainers based on sterically hindered cationic phosphonium amphiphiles

Self-aggregation processes in an H 2 O—DMF (10%) medium were studied for a homologous series of tri- tert -butyl( n -alkyl)phosphonium tetrafluoroborates (PIL- n , where n = 10, 12, 14, 16, and 18) using tensiometry and conductometry. A decrease in the critical micelle concentration from 10 to 0.4 m...

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Bibliographic Details
Published in:Russian chemical bulletin 2022-04, Vol.71 (4), p.804-811
Main Authors: Arkhipova, D. M., Ermolaev, V. V., Milyukov, V. A., Valeeva, F. G., Gaynanova, G. A., Zakharova, L. Ya
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
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Homology
Inorganic Chemistry
Mathematical analysis
Micelles
Organic Chemistry
Solubilization
Spectrophotometry
Surface tension
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Summary:Self-aggregation processes in an H 2 O—DMF (10%) medium were studied for a homologous series of tri- tert -butyl( n -alkyl)phosphonium tetrafluoroborates (PIL- n , where n = 10, 12, 14, 16, and 18) using tensiometry and conductometry. A decrease in the critical micelle concentration from 10 to 0.4 mmol L −1 (tensiometry) was shown in the series PIL-10 > PIL-12 > PIL-14 > > PIL-16. The hydrodynamic diameter of the aggregates in solutions of phosphonium salts of various nature was shown to be in a narrow range. The thermodynamic parameters of adsorption and micelle formation were calculated from surface tension isotherms. The solubilizing ability of the phosphonium surfactants was evaluated by spectrophotometry using the hydrophobic dye Orange OT as an example. The maximum solubilization capacity in the series was demonstrated by the salt with the tetradecyl substituent (PIL-14) at the phosphorus atom.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-022-3481-7