pH-responsive fatty acid self-assembly transition induced by UV light

Arnould, Audrey; Gaillard, Cédric; Fameau, Anne‐Laure

doi:10.1016/j.jcis.2015.07.043

Cited by 29 publications

(16 citation statements)

References 46 publications

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“…Surfactants continue to attract widespread attention from both theoretical research and industrial applications because of unique interfacial properties and various aggregates structures. Recently, stimuli-responsive surfactants have received substantial attention , because the interfacial properties of solutions containing such surfactants can be flexibly tuned by minor external stimuli, such as pH variation, , CO 2 , − magnetic field, , light, − and redox reactions. ,− Among the various stimuli used as the triggers, redox reactions are of particular interest because similar processes (oxygen metabolism) occur constantly in life entities . Redox-active surfactants that have been studied so far are mainly those that contain functional groups such as ferrocene ,− and disulfide bonds. ,, Studies of novel redox-responsive surfactants have rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

Redox-Controllable Interfacial Properties of Zwitterionic Surfactant Featuring Selenium Atoms

Kong

Guo

et al. 2016

Langmuir

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Control of interfacial properties (foaming and emulsification) plays an important role in industry. Here we developed a novel redox-responsive surfactant, 3-(11-benzylselanyl-undecyl)-dimethylammonium acetate (BSeUCB), using selenium atoms as an environmentally sensitive group. In a reduced state, BSeUCB aqueous solution showed good foaming and emulsification abilities as well as conventional betaine surfactants. After oxidization, BSeUCB transformed into a bola-type structure because of the presence of a new hydrophilic group (selenoxide), and thus the critical micellar concentration, equilibrium surface/interfacial tension, and molecular area at the interface correspondingly increase from 0.32 mM, 46.43 mN·m(-1), 5.30 mN·m(-1), and 0.61 nm(2) to 4.98 mM, 59.15 mN·m(-1), 18.29 mN·m(-1), and 1.22 nm(2), respectively, resulting in a greater amount of energy input required to produce foam or emulsion, and a less dense adsorption layer, i.e., poor foaming and emulsification ability. Such a conversion was reversibly controlled by simply adding a trace amount (<0.06 wt % of the dispersion) of oxidant (H2O2) and reductant (Na2SO3). The products of the redox reaction did not interfere in the switchability except at the first cycle. The oxidization was generally time-consuming, whereas the reduction was very fast.

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Section: Introductionmentioning

confidence: 99%

Redox-Controllable Interfacial Properties of Zwitterionic Surfactant Featuring Selenium Atoms

Kong

Guo

et al. 2016

Langmuir

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“…Foam formation and its stability in a surfactant suspension depend upon gas transfer between bubbles, the flow of liquid in the foam, and film rupture between bubbles [28] . Large assemblies such as vesicles and lamellar structures increase the local viscosity of the suspension hence, decreasing the drainage of liquid from the foam and preventing the transfer of gases between bubbles thereby, stabilizing foam [28,29] . As a result, the foam produced by suspensions containing vesicles is typically larger in volume as compared to micellar suspension [29] .…”

Section: Self-assembly Of Ddp and Physicochemical Properties Of Ddp S...mentioning

confidence: 99%

“…To determine the nature of the self-assembled structures in the suspension, foamability and foam stability assay were carried out at different pH (pH 2, 4, 6, 8 and 10). Foam formation and its stability in a surfactant suspension depend upon gas transfer between bubbles, the flow of liquid in the foam, and film rupture between bubbles [28] . Large assemblies such as vesicles and lamellar structures increase the local viscosity of the suspension hence, decreasing the drainage of liquid from the foam and preventing the transfer of gases between bubbles thereby, stabilizing foam [28,29] .…”

Section: Self-assembly Of Ddp and Physicochemical Properties Of Ddp S...mentioning

confidence: 99%

pH-responsive self-assembled compartments as tuneable model protocellular membrane systems

Sarkar

Dagar

Lahiri

et al. 2022

Preprint

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Prebiotically plausible single-chain amphiphiles are enticing as model protocellular compartments to study the emergence of cellular life owing to their self-assembling properties. Here, we investigated the self-assembly behaviour of mono-N-dodecyl phosphate (DDP) and mixed systems of DDP with dodecyl 1-dodecanol (DOH) at varying pH conditions. Membranes composed of DDP showed pH-responsive vesicle formation in a wide range of pH with a low critical bilayer concentration (CBC). Further, the addition of DOH to DDP membrane system enhanced vesicle formation and stability in alkaline pH regimes. We also compared the high-temperature behaviour of DDP and DDP-DOH membranes with conventional fatty acid membranes. Both, DDP and DDP:DOH mixed membranes possess packing that is similar to decanoic acid membrane. However, the micropolarity of these systems are similar to phospholipid membranes. Finally, the pH-dependent modulation of different phospholipid membranes doped with DDP was also demonstrated to engineer tuneable membranes with potential translational implications.

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“…The importance of PAG in the light-controlled self-assembly of amphiphiles was well-understood in the past decades, and Raghavan’s group has contributed a lot in this area. − Until now, numerous systems have been studied both in the bulk phase and at the interface to control the morphology of the aggregates, the viscosity of the systems, the stability of foams, and so forth. In those systems, the release of hydrogen ions from PAG molecules under UV light irradiation to alter the protonation degree of pH-responsive chemicals was the key.…”

Section: Introductionmentioning

confidence: 99%

Light-Switchable Self-Assembly of Non-Photoresponsive Gold Nanoparticles

Cheng

Dong

2018

Langmuir

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Herein, an interesting light-induced self-assembly behavior from non-photoresponsive gold nanoparticles (Au NPs) was reported. Specifically, a pH-responsive amphiphile SPBwas developed that contained a particular phenylboronic acid moiety and showed excellent surface activity at the neutral and basic conditions, thereby stabilizing Au NPs well. Accordingly, the SPB-functionalized Au NPs showed strong pH dependence that there presented the pH-induced reversible self-assembly behavior. Furthermore, the introduction of a small amount of commercially available photoacid generator named diphenyliodonium nitrate (DIN) into the system could endow it with apparent light-switchable self-assembly behavior. The pH- and light-induced self-assembly behaviors of SPB-functionalized Au NPs in the absence and presence of DIN, respectively, were systematically studied by various techniques including UV-vis spectrum, transmission electron microscope, nuclear magnetic resonance, and Fourier transform infrared spectroscopy, which evidently confirmed that the stimuli-responsive self-assembly was controlled by the hydrogen-bonding interactions between phenylboronic acid moieties. Attributing to the light-induced obvious color change from bright-red to deep purple, the system was applied in particle imprinting successfully.

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pH-responsive fatty acid self-assembly transition induced by UV light

Cited by 29 publications

References 46 publications

Redox-Controllable Interfacial Properties of Zwitterionic Surfactant Featuring Selenium Atoms

Redox-Controllable Interfacial Properties of Zwitterionic Surfactant Featuring Selenium Atoms

pH-responsive self-assembled compartments as tuneable model protocellular membrane systems

Light-Switchable Self-Assembly of Non-Photoresponsive Gold Nanoparticles

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