Vesicle-micelle transition in mixtures of dioctadecyldimethylammonium chloride and bromide with nonionic and zwitterionic surfactants

Langmuir : the ACS Journal of Surfaces and Colloids
E FeitosaWatson Loh

Abstract

We have investigated the effect of mixing spontaneously formed dispersions of the cationic vesicle-forming dioctadecyldimethylammonium chloride and bromide (DODAX, with X being anions Cl- (C) or Br- (B)) with solutions of the micelle-forming nonionic ethylene oxide surfactants penta-, hepta-, and octaethyleneglycol mono-n-dodecyl ether, C12E(n) (n = 5, 7, and 8), and the zwitterionic 3-(N-hexadecyl-N,N-dimethylammonio)propane sulfonate (HPS). We used for this purpose differential scanning calorimetry (DSC), turbidity, and steady-state fluorescence spectroscopy to investigate the vesicle-micelle (V-M) transition yielded by adding C12E(n) and HPS to 1.0 mM vesicle dispersions of DODAC and DODAB. The addition of these surfactants lowers the gel-to-liquid crystalline phase transition temperature (T(m)) of DODAC and DODAB, and the transition becomes less cooperative, that is, the thermogram transition peak shifts to lower temperature and broadens to disappear when the V-M transition is complete, the vesicle bilayer becomes less organized, and the T(m) decreases, in agreement with measurements of the fluorescence quantum yield of trans-diphenylpolyene (t-DPO) fluorescence molecules incorporated in the vesicle bilayer. Turbidity data ...Continue Reading

References

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Citations

Apr 6, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Sampad GhoshJoykrishna Dey
Aug 30, 2013·Physical Chemistry Chemical Physics : PCCP·Dinar R GabdrakhmanovYuriy F Zuev
Jan 15, 2014·Physical Chemistry Chemical Physics : PCCP·Wei LiBuxing Han
Dec 10, 2009·Chemistry : a European Journal·Wei LiJianping Ye
Sep 10, 2014·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Sarthak MandalNilmoni Sarkar
Dec 27, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Yao ChenYilin Wang
Dec 4, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Wei LiYueju Zhao
Nov 13, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·I TuckerD J Tildesleyt
May 1, 2021·Animals : an Open Access Journal From MDPI·Juan Carlos Hernández-GonzálezNayeli Shantal Castrejón-Jiménez
Jun 22, 2010·Chemical Reviews·Renhao Dong, Jingcheng Hao
Aug 28, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Rajwinder KaurRakesh Kumar Mahajan
Jun 8, 2007·The Journal of Physical Chemistry. B·Ashok MohantyJoykrishna Dey
Oct 12, 2007·The Journal of Physical Chemistry. B·Claudia C MedugnoM Teresa Lamy

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