Reactions of Singlet Oxygen with Olefins and Sterically Hindered Amine in Mixed Surfactant Vesicles

2000 ◽  
Vol 122 (11) ◽  
pp. 2446-2451 ◽  
Author(s):  
Hong-Ru Li ◽  
Li-Zhu Wu ◽  
Chen-Ho Tung
Keyword(s):  
Singlet Oxygen ◽  
Mixed Surfactant ◽  
Surfactant Vesicles ◽  
Sterically Hindered ◽  
Sterically Hindered Amine

Alternate Self-Regeneration of Stereocenters:  Enantioselective Generation of aC2-Symmetric Chiral Nitroxide and Its Reduction to the Corresponding, Highly Sterically Hindered Amine

1997 ◽  
Vol 62 (26) ◽  
pp. 9385-9387 ◽  
Author(s):  
Jacques Einhorn ◽  
Cathy Einhorn ◽  
Fabien Ratajczak ◽  
Isabelle Gautier-Luneau ◽  
Jean-Louis Pierre
Keyword(s):  
Sterically Hindered ◽  
Sterically Hindered Amine

Stability and Phase Behavior of Mixed-Surfactant Vesicles

1991 ◽  
Vol 248 ◽  
Author(s):  
F. C. Mackintosh ◽  
S. A. Safran
Keyword(s):  
Phase Separation ◽  
Degrees Of Freedom ◽  
Bilayer Membrane ◽  
Mixed Surfactant ◽  
Surfactant Mixtures ◽  
Surfactant Vesicles ◽  
Fluid Membranes ◽  
Curvature Elasticity ◽  
Bulk System ◽  
Internal Degrees Of Freedom

AbstractWhile ideal fluid membranes are characterized solely by curvature elasticity, many structural (“external”) properties of real membranes are strongly influenced by “internal degrees of freedom”. In particular, recent experimental reports of stable vesicles in surfactant mixtures seem to illustrate the important interplay between composition and curvature in bilayer membranes. Such stable vesicles are unexpected in single-surfactant bilayers. We show theoretically how the energetic stabilization of mixed vesicles can occur in mixed-surfactant systems. This is illustrated by a microscopic model of mixed-surfactant bilayers, which is treated within both the random mixing and strongly interacting limits. The predictions of the ranges of stability of the various phases as a function of the three concentrations (solvent - e.g., water - and the two amphiphiles) is in qualitative agreement with recent experiments.In addition, we consider the effect of phase separation in a mixed-surfactant system. In contrast with a bulk system, we find that for a binary mixture in a two dimensional fluid bilayer membrane, phase separation determines a length scale for the formation of stable vesicles. This results in a stable, one phase vesicle region near the critical composition, with a simple dependence of the vesicle size on composition. We also find regions of coexistence of vesicles with lamellae.

Enhanced solubilization of curcumin in mixed surfactant vesicles

2016 ◽  
Vol 199 ◽  
pp. 660-666 ◽  
Author(s):  
Arun Kumar ◽  
Gurpreet Kaur ◽  
S.K. Kansal ◽  
Ganga Ram Chaudhary ◽  
S.K. Mehta
Keyword(s):  
Mixed Surfactant ◽  
Surfactant Vesicles
Sign in / Sign up

Export Citation Format

Share Document