Aggregation of 1-alkyl-3-methylimidazolium octylsulphate ionic liquids and their interaction with Triton X-100 micelles

Thakkar, Khushbu; Bharatiya, Bhavesh; Aswal, Vinod K.; Bahadur, Pratap

doi:10.1039/c6ra14664c

Cited by 21 publications

(17 citation statements)

References 73 publications

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“…Interestingly, Thakkar et al have examined the aggregation behavior of salt-free catanionic vesicles of 1-alkyl-3-methyl-imidazoliumoctylsuphate (C n mimC 8 SO 4 , where n = 8 and 12), using SANS and the bilayer thickness close to their corresponding extended chain lengths. 74 Further, these results support our hypothesis of full time chain/organic-moiety counter-ion workers; that is, on removing the inorganic counter-ions, the shell thickness increases, which is also observed in our present study. As explored by SANS measurements, [C 6 mim][DF] surprisingly forms vesicles even though possessing a very small alkyl chain of six carbon atoms.…”

Section: Morphology: Size and Shape Of Aggregatessupporting

confidence: 92%

Aggregation and Morphological Aptitude of Drug-Based Ionic Liquids in Aqueous Solution

et al. 2017

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Here, we present how replacing the usual inorganic counter ion with a pharmaceutically active aromatic one can greatly affect the interfacial as well as bulk properties of ionic liquids (ILs). We have synthesized a series of novel drug-based ILs, namely, 1-alkyl-3-methylimidazolium diclofenate ([C n mim][DF]; n = 6, 8, 10, 12, and 14) abbreviated as DF-ILs, wherein DF – is a well-recognized analgesic and nonsteroidal anti-inflammatory drug. We show strong synergistic interactions between C n mim + and aromatic DF – attributed to reduced electrostatic repulsions and increased hydrophobicity from their incorporation, reflecting a 300-fold smaller critical aggregation concentration than that of their Cl – analogue [C n mim][Cl]. Interfacial properties for such strongly associating systems are discussed and clearly established to have remarkably improved properties than those of their Cl – analogues. The decreasing polarity of the cybotactic region of pyrene with increase in the chain length “ n ” indicates an increased extent of packing of cationic head groups in the Stern layer. DF – ion seems to play a vital role in the formation of the resulting aggregates, as probed by small angle neutron scattering and transmission electron microscopy. The thermodynamical insights of the aggregation process have been studied using isothermal titration calorimetry and temperature-dependent conductivity experiments. Unilamellar vesicles are formed at extremely low concentration, and also it is the first report that puts into picture the formation of vesicles for [C 6 mim][DF] with such a short chain.

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Section: Morphology: Size and Shape Of Aggregatessupporting

confidence: 92%

Aggregation and Morphological Aptitude of Drug-Based Ionic Liquids in Aqueous Solution

et al. 2017

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“…The steady-state fluorescence quenching has been utilized to determine the aggregation number of the formed mixed micelle. Thakkar et al (2016) synthesized biamphiphilic SAILs 1alkyl-3-methylimidazolium octylsulphates (C n mim C 8 SO 4 , n = 4, 6, 8, 10) and studied the various types of interactions of SAIL molecules with Triton X-100. They concluded the formation of mixed micelles by the incorporation of octylsulphate anion present in SAIL molecules into TX-100 micelle.…”

Section: Sails/surfactants Mixed Micellizationmentioning

confidence: 99%

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Kumar

Kaur

2021

Front. Chem.

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The desire of improving various processes like enhanced oil recovery (EOR), water treatment technologies, biomass extraction, organic synthesis, carbon capture etc. in which conventional surfactants have been traditionally utilized; prompted various researchers to explore the self-assembly and aggregation behavior of different kinds of surface-active molecules. Ionic liquids (ILs) with long alkyl chain present in their structure constitute the advantageous properties of surfactant and ILs, hence termed as surface-active ionic liquids (SAILs). The addition of ILs and SAILs significantly influence the surface-activity and aggregation behavior of industrially useful conventional surfactants. After a brief review of ILs, SAILs and surfactants, the prime focus is made on analyzing the self-assembly of SAILs and the mixed micellization behavior of conventional surfactants with different ILs.

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“…The standard protocol details pertaining to the background corrections, empty cell contributions, transmission, and so forth were mentioned in our earlier reports. 28,51…”

Section: Experimental Methodsmentioning

confidence: 99%

“…2 Thakkar et al provided information on the aggregation of 1-alkyl-3-methylimidazole octylsulfates and their interaction with Triton X-100 micelles. 28 In fact, interaction studies of reverse pluronics with ILs using various physicochemical methods are significantly low. In light of the current growing interest in the interaction between SAILs and reverse pluronics, we have studied the pair, 1-butyl-3-methylimidazolium octylsulfate ([C 4 mim] [C 8 OSO 3 ]) and the reverse pluronic 10R5 (PO 8 EO 22 PO 8 ), by the isothermal titration calorimetry (ITC), nuclear magnetic resonance (NMR), small-angle neutron scattering (SANS), and cryo-/freeze-fracture transmission electron microscopy (Cryo-/FF-TEM) techniques.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Understanding of Self-Aggregation and Microstructure of a Surface-Active Ionic Liquid [C₄mim] [C₈OSO₃] Mixed with a Reverse Pluronic 10R5 (PO₈EO₂₂PO₈)

et al. 2018

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Physicochemical studies on aqueous mixtures of ionic liquids (ILs) and reverse pluronics are limited. Self-aggregation dynamics and microstructure of a surface-active IL (SAIL), 1-butyl-3-methylimidazolium octylsulfate [C 4 mim] [C 8 OSO 3 ], in the presence of a reverse pluronic, PO 8 EO 22 PO 8 (known as 10R5), were studied using isothermal titration calorimetry (ITC), high-resolution nuclear magnetic resonance (NMR), and small-angle neutron scattering (SANS) methods. Also, cryo-/freeze-fracture transmission electron microscopy was employed to determine the microstructures of SAIL/10R5 mixtures. The ITC and NMR results revealed facilitation of SAIL aggregation in the presence of 10R5 forming mixed aggregates as well as free SAIL micelles. 2 H spin relaxation rate data pointed out the onset of slow dynamics of the aqueous SAIL/10R5 mixture with an increase in either the former or the latter. Globular morphologies of the mixed species as well as their individual components were corroborated from the measurements. The preferential location of interaction of the SAIL with the 10R5 was identified from 13 C NMR chemical shift findings to be in the interfacial region of the assembled SAIL. The formed species were mixed interacted aggregates but not mixed micelles that arise from mixed surfactants. The physicochemical information acquired herein would enrich the literature on the 10R5/SAIL mixed microheterogeneous systems having importance in the making of useful green drug carrier systems and templates for the synthesis of nanomaterials.

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Aggregation of 1-alkyl-3-methylimidazolium octylsulphate ionic liquids and their interaction with Triton X-100 micelles

Abstract: Halogen-free surface active and biamphiphilic ionic liquids 1-alkyl-3-methylimidazolium octylsulphates (Cnmim C8SO4, n = 4, 6, 8, 10) were synthesized and their aqueous solution behaviour was studied using NMR and scattering techniques.

Cited by 21 publications

References 73 publications

Aggregation and Morphological Aptitude of Drug-Based Ionic Liquids in Aqueous Solution

Aggregation and Morphological Aptitude of Drug-Based Ionic Liquids in Aqueous Solution

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Physicochemical Understanding of Self-Aggregation and Microstructure of a Surface-Active Ionic Liquid [C₄mim] [C₈OSO₃] Mixed with a Reverse Pluronic 10R5 (PO₈EO₂₂PO₈)

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Aggregation of 1-alkyl-3-methylimidazolium octylsulphate ionic liquids and their interaction with Triton X-100 micelles

Abstract: Halogen-free surface active and biamphiphilic ionic liquids 1-alkyl-3-methylimidazolium octylsulphates (Cnmim C8SO4, n = 4, 6, 8, 10) were synthesized and their aqueous solution behaviour was studied using NMR and scattering techniques.

Cited by 21 publications

References 73 publications

Aggregation and Morphological Aptitude of Drug-Based Ionic Liquids in Aqueous Solution

Aggregation and Morphological Aptitude of Drug-Based Ionic Liquids in Aqueous Solution

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Physicochemical Understanding of Self-Aggregation and Microstructure of a Surface-Active Ionic Liquid [C4mim] [C8OSO3] Mixed with a Reverse Pluronic 10R5 (PO8EO22PO8)

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Physicochemical Understanding of Self-Aggregation and Microstructure of a Surface-Active Ionic Liquid [C₄mim] [C₈OSO₃] Mixed with a Reverse Pluronic 10R5 (PO₈EO₂₂PO₈)