Re-entrant direct hexagonal phases in a lyotropic system of surfactant induced by an ionic liquid

Mitra, Saheli; Karri, Ramesh; Mylapalli, Praveen Kumar; Dey, Arka Bikash; Bhattacharya, Gourav; Roy, Gouriprasanna; Kamil, S. M.; Dhara, Surajit; Sinha, Sunil K.; Ghosh, Sajal K.

doi:10.1080/02678292.2019.1566507

Cited by 7 publications

(5 citation statements)

References 38 publications

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“…These nonflammable solvents have a good thermal stability and ionic conductivity. − They hardly evaporate because of their low vapor pressure, and hence are not considered as air pollutant. − While ordinary liquids, such as water, are predominantly made up of electrically neutral molecules, ionic liquids are composed of short-lived ion pairs. , A diversity of possible combinations of cations and anions provides an opportunity to play with the physicochemical properties of RTILs. It makes them available for a variety of applications such as solvent in organic synthesis, electrochemical processes, − high-performance lubricants, polymer synthesis, food processing, and energy harvesting. − …”

Section: Introductionmentioning

confidence: 99%

Surface Activities of a Lipid Analogue Room-Temperature Ionic Liquid and Its Effects on Phospholipid Membrane

Mitra¹,

Das²,

Singh

et al. 2019

Langmuir

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There are great efforts of synthesizing imidazolium-based ionic liquids (ILs) for developing new antibiotics as these molecules have shown strong antibacterial activities. Compared to a single-hydrocarbon-chained IL, the lipid analogues (LAs) with two chains are more effective. In the present study, the LA molecule MeIm(COOH)Me(Oleylamine)Iodide has been synthesized and its surface activities along with the effectiveness in restructuring of a model cellular membrane have been quantified. The molecule is found to be highly surface active as estimated from the area–pressure isotherm of a monolayer of the molecules formed at the air–water interface. The X-ray reflectivity (XRR) studies of a monolayer dip-coated on a hydrophilic substrate have shown the structural properties of the layer which resembles to those of unsaturated phospholipids. The LA molecules are observed to fluidize a phospholipid bilayer formed by the saturated lipid 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). At a lower surface pressure, the lipid monolayer of DPPC has exhibited a thickening effect at a low concentration of added LA and a thinning effect at higher concentration. However, at a high surface pressure of the monolayer, the thickness is found to decrease monotonically. The in-plane pressure-dependent interaction of LA molecules with model cellular membrane and the corresponding perturbation in the structure and physical properties of the membrane may be linked to the strong lysing effect of these types of molecules.

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Section: Introductionmentioning

confidence: 99%

Surface Activities of a Lipid Analogue Room-Temperature Ionic Liquid and Its Effects on Phospholipid Membrane

Mitra¹,

Das²,

Singh

et al. 2019

Langmuir

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“…This argument can be further understood on the basis of the size comparison of guest and host. SDS is a short-chain (chain length ∼16.7 Å, computed from Tanford equation l max = 1.54 + 1.265 n c A ) amphiphilic molecule with a head group with an area ∼45 Å, 65,66 while the size of the GQDs ∼22 nm is much higher than that of amphiphilic species. Hence, there are no intercalations in the nanocolloids, otherwise, the LLC phases would not remain intent after doping.…”

Section: Resultsmentioning

confidence: 99%

Graphene quantum dot doped viscoelastic lyotropic liquid crystal nanocolloids for antibacterial applications

Singh¹,

Farheen²,

Sachdev³

et al. 2023

Soft Matter

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“…The perpetual dependence on these surfactants makes it much more important to study them thoroughly. There is an abundance of papers on surfactants like sodium dodecyl sulfate (SDS). − These surfactants have been explored by researchers experimentally as well as computationally. This type of aqueous solution, which is obtained by mixing surfactants of different natures and opposite head charges, is known as a solution of a catanionic surfactant.…”

Section: Introductionmentioning

confidence: 99%

Phase Diagram Study of Catanionic Surfactants Using Dissipative Particle Dynamics

Choudhary

Kamil

2022

ACS Omega

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Dissipative particle dynamics (DPD) simulations has been performed to study the phase transition of a mixture of cationic and anionic surfactants in an aqueous solution as a function of the total concentration in water and the relative ratio of surfactants. The impact of the relative difference between the tail lengths of the cationic and anionic surfactants on the phase diagram has been simulated by tuning the number of DPD beads in the simulation model. This research also discusses the impact of the frequently used values of the parameters associated with the harmonic bonds among the bonded DPD beads on the obtained self-assemblies. We find remarkable differences in the resultant self-assemblies based on different choices of harmonic bond parameters. The performed simulations show an enhanced spectrum of self-assemblies with augmented tail lengths and disparate harmonic bond parameters. The obtained self-assemblies are quite unique and can potentially be used in the future for various applications. We also compare the simulation results of the vesicle structures obtained by modeling the electrostatic interaction in the simulation among the charged beads by explicitly introducing charges with a long-range interaction with those obtained by tuning the implicit electrostatic interaction without the long-range interaction. The effects of the chain length of the model and the harmonic bond parameters on the internal density of DPD beads and stress profiles within the vesicles are examined closely. These results are a significant contribution to understanding the stability of the phases and tailoring of the desired vesicles.

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Re-entrant direct hexagonal phases in a lyotropic system of surfactant induced by an ionic liquid

Cited by 7 publications

References 38 publications

Surface Activities of a Lipid Analogue Room-Temperature Ionic Liquid and Its Effects on Phospholipid Membrane

Surface Activities of a Lipid Analogue Room-Temperature Ionic Liquid and Its Effects on Phospholipid Membrane

Graphene quantum dot doped viscoelastic lyotropic liquid crystal nanocolloids for antibacterial applications

Phase Diagram Study of Catanionic Surfactants Using Dissipative Particle Dynamics

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