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Self-assembly mechanism of pH-responsive glycolipids : micelles, fibers, vesicles, and bilayers

(2016) LANGMUIR. 32(42). p.10881-10894
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Abstract
A set of four structurally related glycolipids are described: two of them have one glucose unit connected to either stearic or oleic acid, and two other ones have a diglucose headgroup (sophorose) similarly connected to either stearic or oleic acid. The self-assembly properties of these compounds, poorly known, are important to know due to their use in various fields of application from cleaning to cosmetics to medical. At basic pH, they all form mainly small micellar aggregates. At acidic pH, the oleic and stearic derivatives of the monoglucose form, respectively, vesicles and bilayer, while the same derivatives of the sophorose headgroup form micelles and twisted ribbons. We use pH-resolved in situ small angle X-ray scattering (SAXS) under synchrotron radiation to characterize the pH-dependent mechanism of evolution from micelles to the more complex aggregates at acidic pH. By pointing out the importance of the COO-/COOH ratio, the melting temperature, T-m, of the lipid moieties, hydration of the glycosidic headgroup, the packing parameter, membrane rigidity, and edge stabilization, we are now able to draw a precise picture of the full self-assembly mechanism. This work is a didactical illustration of the complexity of the self-assembly process of a stimuli-responsive amphiphile during which many concomitant parameters play a key role at different stages of the process.
Keywords
MICROBIAL-PRODUCTION, SENSITIVE VESICLES, AQUEOUS-SOLUTIONS, PHASE-BEHAVIOR, SURFACTANTS, BIOSURFACTANTS, SCATTERING, AMPHIPHILES, MIXTURES, FIBRILLOGENESIS

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Chicago
Baccile, Niki, Anne-Sophie Cuvier, Sylvain Prévost, Christian Stevens, Elisabeth Delbeke, Jan Berton, Wim Soetaert, Inge Van Bogaert, and Sophie Roelants. 2016. “Self-assembly Mechanism of pH-responsive Glycolipids : Micelles, Fibers, Vesicles, and Bilayers.” Langmuir 32 (42): 10881–10894.
APA
Baccile, N., Cuvier, A.-S., Prévost, S., Stevens, C., Delbeke, E., Berton, J., Soetaert, W., et al. (2016). Self-assembly mechanism of pH-responsive glycolipids : micelles, fibers, vesicles, and bilayers. LANGMUIR, 32(42), 10881–10894.
Vancouver
1.
Baccile N, Cuvier A-S, Prévost S, Stevens C, Delbeke E, Berton J, et al. Self-assembly mechanism of pH-responsive glycolipids : micelles, fibers, vesicles, and bilayers. LANGMUIR. 2016;32(42):10881–94.
MLA
Baccile, Niki, Anne-Sophie Cuvier, Sylvain Prévost, et al. “Self-assembly Mechanism of pH-responsive Glycolipids : Micelles, Fibers, Vesicles, and Bilayers.” LANGMUIR 32.42 (2016): 10881–10894. Print.
@article{8504272,
  abstract     = {A set of four structurally related glycolipids are described: two of them have one glucose unit connected to either stearic or oleic acid, and two other ones have a diglucose headgroup (sophorose) similarly connected to either stearic or oleic acid. The self-assembly properties of these compounds, poorly known, are important to know due to their use in various fields of application from cleaning to cosmetics to medical. At basic pH, they all form mainly small micellar aggregates. At acidic pH, the oleic and stearic derivatives of the monoglucose form, respectively, vesicles and bilayer, while the same derivatives of the sophorose headgroup form micelles and twisted ribbons. We use pH-resolved in situ small angle X-ray scattering (SAXS) under synchrotron radiation to characterize the pH-dependent mechanism of evolution from micelles to the more complex aggregates at acidic pH. By pointing out the importance of the COO-/COOH ratio, the melting temperature, T-m, of the lipid moieties, hydration of the glycosidic headgroup, the packing parameter, membrane rigidity, and edge stabilization, we are now able to draw a precise picture of the full self-assembly mechanism. This work is a didactical illustration of the complexity of the self-assembly process of a stimuli-responsive amphiphile during which many concomitant parameters play a key role at different stages of the process.},
  author       = {Baccile, Niki and Cuvier, Anne-Sophie and Pr{\'e}vost, Sylvain and Stevens, Christian and Delbeke, Elisabeth and Berton, Jan and Soetaert, Wim and Van Bogaert, Inge and Roelants, Sophie},
  issn         = {0743-7463},
  journal      = {LANGMUIR},
  language     = {eng},
  number       = {42},
  pages        = {10881--10894},
  title        = {Self-assembly mechanism of pH-responsive glycolipids : micelles, fibers, vesicles, and bilayers},
  url          = {http://dx.doi.org/10.1021/acs.langmuir.6b02337},
  volume       = {32},
  year         = {2016},
}

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