scholarly journals Micelle formation of a non-ionic surfactant in non-aqueous molecular solvents and protic ionic liquids (PILs)

2016 ◽  
Vol 18 (35) ◽  
pp. 24377-24386 ◽  
Author(s):  
Emmy C. Wijaya ◽  
Frances Separovic ◽  
Calum J. Drummond ◽  
Tamar L. Greaves
Keyword(s):  
Free Energy ◽  
Ionic Liquids ◽  
Energy Density ◽  
Micelle Formation ◽  
Ionic Surfactant ◽  
Protic Ionic Liquids ◽  
Diverse Range ◽  
Cohesive Energy Density ◽  
Free Energy Of Micellization ◽  
Molecular Solvents

Micelle formation of a non-ionic amphiphile, C12E6, was investigated in a diverse range of molecular solvents and protic ionic liquids (PILs). A link between the solvent cohesive energy density and the free energy of micellization was discussed.

Equilibrium of Contact and Solvent-Separated Ion Pairs in Mixtures of Protic Ionic Liquids and Molecular Solvents Controlled by Polarity

2013 ◽  
Vol 52 (47) ◽  
pp. 12439-12442 ◽  
Author(s):  
Koichi Fumino ◽  
Peter Stange ◽  
Verlaine Fossog ◽  
Rolf Hempelmann ◽  
Ralf Ludwig
Keyword(s):  
Ionic Liquids ◽  
Ion Pairs ◽  
Protic Ionic Liquids ◽  
Molecular Solvents

Solvent-mediated molar conductivity of protic ionic liquids

2015 ◽  
Vol 17 (1) ◽  
pp. 475-482 ◽  
Author(s):  
Sachin Thawarkar ◽  
Nageshwar D. Khupse ◽  
Anil Kumar
Keyword(s):  
Ionic Liquids ◽  
Molar Conductivity ◽  
Protic Ionic Liquids ◽  
Molecular Solvents

The molar conductivity, Λm, of protic ionic liquids (PILs) in molecular solvents is measured at 298.15 K.

Interaction of cationic surfactant with acid yellow dye in absence/presence of organic and inorganic additives: conductivity and dye solubilization methods

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Md. Ariful Haque ◽  
Shamim Mahbub ◽  
Mohammad Majibur Rahman ◽  
Md. Anamul Hoque ◽  
Dileep Kumar ◽  
...  
Keyword(s):  
Free Energy ◽  
Cationic Surfactant ◽  
Cetyltrimethylammonium Bromide ◽  
Micelle Formation ◽  
Aqueous System ◽  
Nacl Solution ◽  
Solubilization Capacity ◽  
Delta G ◽  
Free Energy Of Micellization ◽  
Dye Solubilization

Abstract In the present study, the conductometric and dye-solubilization techniques have been utilized to investigate the interaction between an anionic dye (acid yellow 23 [AY]) and a cationic surfactant (cetyltrimethylammonium bromide [CTAB]) in presence of organic (ethanol)/inorganic (NaCl) additives. From the conductometric method, two critical micelle concentrations (cmc) were found for AY + CTAB mixture in an aqueous system and the cmc values were found to undergo a change with the variation of AY concentrations. The cmc values of AY + CTAB systems were observed higher in the alcoholic medium, while the same was found to be lower in the NaCl solutions. The change in cmc of AY + CTAB systems shows an U-like curve with an increase of temperature. The negative free energy of micellization ( Δ G m o ${\Delta}{G}_{m}^{o}$ ) for the AY + CTAB systems has indicated a spontaneous micelle formation in all of the cases studied. The enthalpy ( Δ H m o ${\Delta}{H}_{m}^{o}$ ), as well as the entropy of micellization ( Δ S m o ${\Delta}{S}_{m}^{o}$ ) for the AY + CTAB systems, were assessed and discussed with proper reasoning. Additionally, the enthalpy-entropy compensation parameters were also investigated and illustrated. The solubility of AY and C D was observed to rise linearly with an increase in the concentration of CTAB/NaCl solution. The solubilization capacity (χ) of AY, the molar partition coefficient (K M) amongst the micellar and the aqueous phase, and free energy of solubilization ( Δ G S o ${\Delta}{G}_{S}^{o}$ ) were evaluated and discussed in detail. The former parameters undergo an increase with an increase of NaCl concentrations.

Amino Acid-derived Protic Ionic Liquids: Physicochemical Properties and Behaviour as Amphiphile Self-assembly Media

2011 ◽  
Vol 64 (2) ◽  
pp. 180 ◽  
Author(s):  
Jiayi Wang ◽  
Tamar L. Greaves ◽  
Danielle F. Kennedy ◽  
Asoka Weerawardena ◽  
Gonghua Song ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Amino Acid ◽  
Methyl Ester ◽  
Physicochemical Properties ◽  
Self Assembly ◽  
Ionic Surfactant ◽  
Hexadecyltrimethylammonium Bromide ◽  
Structure Property ◽  
Protic Ionic Liquids ◽  
Fused Salts

The thermal phase transitions and physicochemical properties of a series of 21 amino acid-derived protic ionic liquids and four protic molten salts have been investigated. Structure–property comparisons for this series were investigated for alkyl- and cyclic amino acid cations, and ethoxy and methoxy groups on the cation, combined with nitrate or various carboxylate-containing anions. All the protic fused salts were found to be ‘fragile’. Most of the protic fused salts exhibited a glass transition, with the transition temperatures ranging from –90° to –42°C. Viscosities and conductivities ranged from 0.03 to 15.46 Pa s and 0.02 to 2.20 mS cm–1 at 25°C respectively. The protic ionic liquids alanine methyl ester glycolate, proline methyl ester nitrate, and proline methyl ester glycolate were found to be capable of supporting amphiphile self-assembly. Lamellar or hexagonal liquid crystalline phases were observed with the cationic surfactant hexadecyltrimethylammonium bromide and the non-ionic surfactant Myverol 18–99K.

scholarly journals The origin of surfactant amphiphilicity and self-assembly in protic ionic liquids

2015 ◽  
Vol 6 (11) ◽  
pp. 6189-6198 ◽  
Author(s):  
Andrew Dolan ◽  
Rob Atkin ◽  
Gregory G. Warr
Keyword(s):  
Ionic Liquids ◽  
Self Assembly ◽  
Alkyl Chain ◽  
Micelle Formation ◽  
Head Group ◽  
Protic Ionic Liquids

Surfactant alkyl chain, head-group and counterion solvation in protic ionic liquids differs from water, affecting micelle formation and structure.

Utilization of the dye N-methyl-6-oxyquinolone as an optical acidometer in molecular solvents and protic ionic liquids

2017 ◽  
Vol 53 (78) ◽  
pp. 10761-10764 ◽  
Author(s):  
Stella Schmode ◽  
Ralf Ludwig
Keyword(s):  
Ionic Liquids ◽  
Protic Ionic Liquids ◽  
Highly Sensitive ◽  
Molecular Solvents

We developed a procedure to use the highly sensitive dyeN-methyl-6-oxyquinolone as an acidity probe in molecular solvents and protic ionic liquids.

1,8-Diazabicyclo[5.4.0]-undec-7-ene based protic ionic liquids and their binary systems with molecular solvents catalyzed Michael addition reaction

2020 ◽  
Vol 44 (32) ◽  
pp. 13701-13706
Author(s):  
Gulshan Ara ◽  
Muhammed Shah Miran ◽  
Md. Mominul Islam ◽  
M. Yousuf A. Mollah ◽  
M. Muhibur Rahman ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Ionic Liquids ◽  
Michael Addition ◽  
Binary Systems ◽  
Addition Reaction ◽  
Michael Addition Reaction ◽  
Protic Ionic Liquids ◽  
Molecular Solvents

Michael addition reaction of acetylacetone and cyclohexenone has been studied using 1,8-diazabicyclo[5.4.0]-undec-7-ene (DBU) based protic ionic liquids and their binary systems with DBU, water and acetic acid as catalysts.

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