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Synthesis, Surface Activities and Toluene Solubilization by Amine‐oxide Gemini Surfactants
Author(s) -
Liu Hongqin,
Hu Jun,
Xu Baocai,
Zhao Tingting,
Shi Guoying,
Zhang Guiju
Publication year - 2016
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-016-1828-5
Subject(s) - chemistry , amine oxide , critical micelle concentration , amide , toluene , amine gas treating , isoelectric point , surface tension , alkyl , ethylenediamine , micelle , oxide , nuclear chemistry , organic chemistry , aqueous solution , physics , quantum mechanics , enzyme
A series of amine‐oxide gemini surfactants featuring amide groups [ N , N ’‐dimethyl‐ N , N ’‐bis(2‐alkylamideethyl)‐ethylenediamine oxide (alkyl = C 11 H 23 , C 13 H 27 , C 15 H 31 , C 17 H 35 )] have been synthesized via a three‐step synthetic route, and their chemical structures were confirmed by mass spectra, FTIR and 1 H‐NMR spectra. The surface activities of these compounds have been measured. The results show that these synthesized amine‐oxide gemini surfactants reduced the surface tension of water to a minimum value of approximately 26.91 mN m −1 at a concentration of 2.92 × 10 −5 mol L −1 . Furthermore, their critical micelle concentration (CMC) values and solubilization of toluene decrease with an increase of the hydrophobic chain length from 12 to 18. Isoelectric point measurements revealed that their p I values range from 4.0 to 10.5.