Micellar properties of two-headed surfactant systems: the disodium 1,2-alkanedisulfates

1995 ◽  
Vol 73 (10) ◽  
pp. 1741-1745 ◽  
Author(s):  
Ellen K. Comeau ◽  
Ellen J. Beck ◽  
Jennifer F. Caplan ◽  
Calvin V. Howley ◽  
D. Gerrard Marangoni
Keyword(s):  
Aqueous Solution ◽  
Chlorosulfonic Acid ◽  
Sodium Ion ◽  
Counterion Binding ◽  
Critical Micelle Concentrations ◽  
Micellar Properties ◽  
Activity Measurements ◽  
Surfactant Systems

A family of two-headed surfactants, the disodium 1,2-alkanedisulfates, has been synthesized by the addition of chlorosulfonic acid to the corresponding 1,2-alkanediol. The ability of these salts to form micelles in aqueous solution is demonstrated from solution conductance measurements and counterion activity measurements of the sodium ion. The critical micelle concentrations (cmc's) and apparent degrees of counterion binding (β′ values) of these surfactants indicate that the addition of the second headgroup has a profound effect on the micelles formed by the disulfates when compared to their monosulfate analogues. Keywords: surfactants, synthesis, micellization, cmc values, counterion binding.

Article

1998 ◽  
Vol 76 (9) ◽  
pp. 1266-1273 ◽  
Author(s):  
Gregory D Boucher ◽  
Aaron C MacDonald ◽  
Brent E Hawrylak ◽  
D Gerrard Marangoni
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
Maleic Anhydride ◽  
Chain Length ◽  
Chemical Shifts ◽  
Sodium Bisulfite ◽  
Critical Micelle Concentrations ◽  
Aggregation Numbers ◽  
Nmr Techniques ◽  
Surfactant Systems

A family of two-headed surfactants, the disodium 4-alkyl-3-sulfonatosuccinates, has been synthesized by the monoesterification of maleic anhydride and the addition of sodium bisulfite to the corresponding monoester. The properties the micelles formed by these compounds in aqueous solution, and the conformations of the chains comprising the micellar interior, have been investigated using a combination of 1-D nmr experiments and homonuclear and heteronuclear 2-D nmr techniques. The critical micelle concentrations (cmc's) and the aggregation numbers determined from the nmr experiments indicate that, in agreement with the earlier literature on other two-headed surfactant systems, these amphiphiles have high cmc's and low aggregation numbers when compared to single-headed surfactants of comparable chain length. All these results are interpreted in terms of the effect of adding a second headgroup to a single-headed, single-tailed surfactant.Key words: micelles, surfactants, nmr spectroscopy, chemical shifts, aggregation numbers.

scholarly journals Correction: Local structure of a highly concentrated NaClO4 aqueous solution-type electrolyte for sodium ion batteries

2021 ◽  
Vol 23 (16) ◽  
pp. 10130-10131
Author(s):  
Ryo Sakamoto ◽  
Maho Yamashita ◽  
Kosuke Nakamoto ◽  
Yongquan Zhou ◽  
Nobuko Yoshimoto ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Local Structure ◽  
Chem Phys ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Solution Type ◽  
Type Electrolyte ◽  
Phys Chem Chem Phys

Correction for ‘Local structure of a highly concentrated NaClO4 aqueous solution-type electrolyte for sodium ion batteries’ by Ryo Sakamoto et al., Phys. Chem. Chem. Phys., 2020, 22, 26452–26458, DOI: 10.1039/D0CP04376A.

scholarly journals Critical Micelle Concentrations of Perfluoroalkanesulfonate Salts in Aqueous Solution.

1997 ◽  
Vol 46 (2) ◽  
pp. 209-212 ◽  
Author(s):  
Kunio TAMAKI ◽  
Kenji KOBAYASHI ◽  
Toshio NOMURA ◽  
Masahiro IIJIMA ◽  
Misho SHIMOI
Keyword(s):  
Aqueous Solution ◽  
Critical Micelle Concentrations

Adsorption of sodium cyclododecylmethanoate and cycloundecylmethanoate at the air/water interface

1984 ◽  
Vol 62 (11) ◽  
pp. 2359-2363 ◽  
Author(s):  
Jan J. Spitzer
Keyword(s):  
Aqueous Solutions ◽  
Sodium Ion ◽  
Ion Concentration ◽  
Ionic Surfactants ◽  
Free Energies ◽  
Straight Chain ◽  
Double Chain ◽  
Adsorbed State ◽  
Critical Micelle Concentrations ◽  
Air Water Interface

Surface tension measurements on aqueous solutions of sodium cyclododecylmethanoate and sodium cycloundecylmethanoate in sodium carbonate/bicarbonate buffers and at constant sodium ion concentration at 25 °C were used to obtain the standard free energies of adsorption, the saturation areas per surfactant ion, and the critical "micelle" concentrations of these compounds. Similar measurements were done for solutions of sodium dodecanoate for comparisons.The standard free energies of adsorption of CH2 group that is located in a macrocyclic cycloalkyl ring appears to follow the "rule of two" (−RT ln 2) that is also valid for straight chain ionic surfactants. The saturation areas of both cyclododecylmethanoate and cycloundecylmethanoate are about 52 Å2/ion as compared to about 32 Å2/ion for normal dodecanoate.For large ring cycloalkylmethanoates the critical "micelle" concentrations appear to decrease by a factor of about 4/5 for each CH2 group added to the ring as compared to the factor of about 1/2 for each CH2 group added to the chain of normal alkanoates. The data suggest that large cycloalkyl rings have "collapsed ring", or "double chain", conformation in aqueous solutions and in the adsorbed state.

Thermodynamics of self-aggregation of mixed cationic gemini/sodium deoxycholate surfactant systems in aqueous solution

2018 ◽  
Vol 135 (5) ◽  
pp. 2903-2913 ◽  
Author(s):  
Yujie Wang ◽  
Hui Wu ◽  
Jiuxia Wang ◽  
Pengxiao Lou ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sodium Deoxycholate ◽  
Surfactant Systems ◽  
Self Aggregation
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