Self-assembled organogels obtained by adding minute concentrations of a bile salt to AOT reverse micelles

Tung, Shih‐Huang; Huang, Yi-En; Raghavan, Srinivasa R.

doi:10.1039/b718145k

Cited by 48 publications

(45 citation statements)

References 31 publications

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“…Compounds 14, 16, and 17 formed strong organogels in a variety of organic solvents (table 1). The PBA ester of a cholamide (14) formed a strong CT gel in aromatic hydrocarbon solvents like benzene similar to reported cholamides (compound 5, not a CT gel). 31 These organogels were characterized by various physical techniques and are discussed in detail in the proceeding sections.…”

Section: Gelation Studiessupporting

confidence: 84%

“…Chemically, the gelation process can be controlled by pH, ionic strength and additives. 14 Stimuli-responsive assembly of low molecular weight materials (MW < 1000) have been intensively studied in gels, micelles, vesicles, and synthetic membranes. 15 Sound, 16,17 light 18-20 and electrochemical controls 21 have been explored as a means of switching molecular aggregations without the use of chemical stimuli.…”

Section: Introductionmentioning

confidence: 99%

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Pyrene appended bile acid conjugates: Synthesis and a structure–gelation property study

et al. 2011

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A wide variety of novel compounds obtained by combining two types of known organogelators, viz., bile acid alkyl amides and pyrene alkanoic acids, were synthesized and screened for their gelation ability. The 3α esters of 1-pyrene butyric acid (PBA) of alkylamides of deoxycholic acid (DCA) turned out to be effective in the gel formation with many organic solvents although the gelation has to be triggered by the addition of a charge transfer (CT) agent 2,4,7-trinitrofluorenone (TNF). The special feature of these molecules is that the organogelation is achieved only after derivatizing the acid moiety of the 1-pyrenealkanoic acids. Additionally, the gelation properties can be fine-tuned by inserting different functional groups at the bile acid side chain. The gels obtained are deep red in colour and optically transparent up to 2% w/v. The SEM studies of the obtained xerogels revealed bundled rod-like morphology without specialized branching.

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Section: Gelation Studiessupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Pyrene appended bile acid conjugates: Synthesis and a structure–gelation property study

et al. 2011

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“…Similar studies have been done by Raghvan et al. by combining sodium deoxycholate (SDC) with AOT . Again, the frequency sweep experiments revealed the dynamic nature of the assembly structure especially with low SDC concentration.…”

Section: Behaviors Of Smgs Under Shear: Non‐healable and Healable Smgsmentioning

confidence: 99%

Low Molecular Weight Supramolecular Gels Under Shear: Rheology as the Tool for Elucidating Structure–Function Correlation

Dawn

Kumari

2017

Chemistry A European J

111

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Self-healing low molecular weight supramolecular gels (SMGs) represent an emerging class of smart materials, which can closely mimic the complex biological healing process, such as blood clotting, bone repair or wound healing. However, a lack of understanding of the structure-function correlation in the self-assembly process limits their molecular design and subsequent property tuning. The indispensability of a rheological study on supramolecular gels lies in direct transcription of the assembly property to the viscoelastic behavior of the material. This is similarly relevant to healable and non-healable systems. Thus, using rheology as a tool for elucidating structure-function relationships in self-assembled systems has huge potential. This review article will depict a general introduction of rheology in the field of soft matter including SMGs, followed by representative studies with interpretations, and discussion on future challenges. Altogether, this would be an effort, where an in-depth rheological study complemented with a real-time visualization with the help of microscopy, and introduction of other sophisticated real-time experiments, could be a step forward to capture the mystery of self-assembly process.

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“…This is consistent with a gel-like structure composed of cylindrical fibers. 26 Upon the addition of Au NPs, an increase in I(q) was observed for q in the range of 0.01À0.04 Å…”

Section: à4mentioning

confidence: 99%

Structure and optical properties of self-assembled multicomponent plasmonic nanogels

Cong

Wani

Paynter

et al. 2011

Applied Physics Letters

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Multicomponent plasmonic nanogels (PNGs) capable of broadband absorption of light in the 400−700 nm wavelength range were synthesized by the self-assembly of metal nanoparticles with wormlike surfactant micelles. Small angle x-ray scattering and rheological experiments suggest that the nanoparticles bridge micelle fragments to aid the formation a stable gel phase with exceptional color uniformity. Their optical absorbance could be robustly tuned by changing the nanoparticle type (Au/Ag), size, shape, and/or concentration. The PNGs have relatively low viscosity and are thermoreversible. Potential applications to the manufacturing of coatings and interfaces for solar energy harvesting and reconfigurable optical devices can be envisioned.

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Self-assembled organogels obtained by adding minute concentrations of a bile salt to AOT reverse micelles

Cited by 48 publications

References 31 publications

Pyrene appended bile acid conjugates: Synthesis and a structure–gelation property study

Pyrene appended bile acid conjugates: Synthesis and a structure–gelation property study

Low Molecular Weight Supramolecular Gels Under Shear: Rheology as the Tool for Elucidating Structure–Function Correlation

Structure and optical properties of self-assembled multicomponent plasmonic nanogels

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