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Li Z, Fan Z, Lian Y, Chen Z. Dielectric analysis of the percolation, interface polarization, and phase behavior of 1-butyl-3-methylimidazolium tetrafluoroborate/TX-100/triethylamine microemulsions. NEW J CHEM 2021. [DOI: 10.1039/d1nj02951g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structure transitions, interface distinction and electrical parameters of a nonaqueous ionic liquid microemulsion reflected by concentration-dependent frequency domain dielectric spectroscopy.
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Affiliation(s)
- Zhen Li
- School of Chemistry and Material Science, Shanxi Normal University, Linfen, Shanxi, 041001, China
- Department of Applied Chemistry, School of Material Science and Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
| | - Zhefeng Fan
- School of Chemistry and Material Science, Shanxi Normal University, Linfen, Shanxi, 041001, China
| | - Yiwei Lian
- Department of Applied Chemistry, School of Material Science and Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
| | - Zhen Chen
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
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Tartaro G, Mateos H, Schirone D, Angelico R, Palazzo G. Microemulsion Microstructure(s): A Tutorial Review. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1657. [PMID: 32846957 PMCID: PMC7558136 DOI: 10.3390/nano10091657] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/05/2020] [Accepted: 08/18/2020] [Indexed: 11/16/2022]
Abstract
Microemulsions are thermodynamically stable, transparent, isotropic single-phase mixtures of two immiscible liquids stabilized by surfactants (and possibly other compounds). The assortment of very different microstructures behind such a univocal macroscopic definition is presented together with the experimental approaches to their determination. This tutorial review includes a necessary overview of the microemulsion phase behavior including the effect of temperature and salinity and of the features of living polymerlike micelles and living networks. Once these key learning points have been acquired, the different theoretical models proposed to rationalize the microemulsion microstructures are reviewed. The focus is on the use of these models as a rationale for the formulation of microemulsions with suitable features. Finally, current achievements and challenges of the use of microemulsions are reviewed.
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Affiliation(s)
- Giuseppe Tartaro
- Department of Chemistry, and CSGI (Center for Colloid and Surface Science), University of Bari, via Orabona 4, 70125 Bari, Italy; (G.T.); (H.M.); (D.S.)
| | - Helena Mateos
- Department of Chemistry, and CSGI (Center for Colloid and Surface Science), University of Bari, via Orabona 4, 70125 Bari, Italy; (G.T.); (H.M.); (D.S.)
| | - Davide Schirone
- Department of Chemistry, and CSGI (Center for Colloid and Surface Science), University of Bari, via Orabona 4, 70125 Bari, Italy; (G.T.); (H.M.); (D.S.)
| | - Ruggero Angelico
- Department of Agricultural, Environmental and Food Sciences (DIAAA), University of Molise, I-86100 Campobasso, Italy;
| | - Gerardo Palazzo
- Department of Chemistry, and CSGI (Center for Colloid and Surface Science), University of Bari, via Orabona 4, 70125 Bari, Italy; (G.T.); (H.M.); (D.S.)
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Brea U, Gómez-Díaz D, Navaza JM, Rumbo A. Carbon dioxide chemical absorption in non-aqueous solvents by the presence of water. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.06.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ren Z, Kelly J, Gunathilaka CP, Brinzer T, Dutta S, Johnson CA, Mitra S, Garrett-Roe S. Ultrafast dynamics of ionic liquids in colloidal dispersion. Phys Chem Chem Phys 2017; 19:32526-32535. [PMID: 29188825 DOI: 10.1039/c7cp04441k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic liquid (IL)-surfactant complexes have significance both in applications and fundamental research, but their underlying dynamics are not well understood. We apply polarization-controlled two-dimensional infrared spectroscopy (2D-IR) to study the dynamics of [BMIM][SCN]/surfactant/solvent model systems. We examine the effect of the choice of surfactants and solvent, and the IL-to-surfactant ratio (W-value), with a detailed analysis of the orientation and structural dynamics of each system. Different surfactants create very different environments for the entrapped ILs, ranging from a semi-static micro-environment to a fluxional environment that evolves even faster than the bulk IL. The oil-phase also clearly affects the microscopic dynamics. The anisotropy decay for entrapped ILs completes within 10 ps, which is similar to free thiocyanate ion in water, while a significant reorientation-induced spectral diffusion (RISD) effect is observed. The entrapped ionic liquid are highly dynamic for all W-values, and no core-shell structure is observed. We hypothesize that, instead of an ionic liquid-reverse micelle (IL-RM), the microscopic structure of this system is small colloidal dispersions or pairs of IL and surfactants. A detailed analysis of the polarization-controlled 2D-IR spectra of AOT system reveals a potential ion-exchange mechanism.
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Affiliation(s)
- Zhe Ren
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA.
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Kuchlyan J, Kundu N, sarkar N. Ionic liquids in microemulsions: Formulation and characterization. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.05.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Crosio MA, Correa NM, Silber JJ, Falcone RD. A protic ionic liquid, when entrapped in cationic reverse micelles, can be used as a suitable solvent for a bimolecular nucleophilic substitution reaction. Org Biomol Chem 2016; 14:3170-7. [DOI: 10.1039/c5ob02664d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Kundu K, Bardhan S, Banerjee S, Chakraborty G, Saha SK, Paul BK. Influence of chemical architecture of oils and ionic liquid on the physicochemical and thermodynamic properties and microenvironment of anionic surfactant based microemulsion. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Blach D, Pessêgo M, Silber JJ, Correa NM, García-Río L, Falcone RD. Ionic liquids entrapped in reverse micelles as nanoreactors for bimolecular nucleophilic substitution reaction. Effect of the confinement on the chloride ion availability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:12130-7. [PMID: 25269078 DOI: 10.1021/la501496a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this work was explored how the confinement of two ionic liquids (ILs), 1-butyl-3-methylimidazolium chloride (bmimCl) and 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF4), inside toluene/benzyl-n-hexadecyldimethylammonium chloride (BHDC) reverse micelles (RMs) affects the Cl(-) nucleophilicity on the bimolecular nucleophilic substitution (SN2) reaction between this anion and dimethyl-4-nitrophenylsulfonium trifluoromethanesulfonate. The results obtained show that, upon confinement, the ionic interactions between the ILs with the cationic surfactant polar head group and the surfactant counterion modify substantially the performance of both ILs as solvents. In toluene/BHDC/bmimCl RMs, the Cl(-) interacts strongly with bmim(+) (and/or BHD(+)) in such a way that its nucleophilicity is reduced in comparison with neat IL. In toluene/BHDC/bmimBF4 RMs, an ionic exchange equilibrium produces segregation of bmim(+) and BF4(-) ions, changing the composition of the RMs interface and affecting dramatically the Cl(-) availability. These results show the versatility of this kind of organized system to alter the ionic organization and influence on reaction rate when used as nanoreactors.
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Affiliation(s)
- Diana Blach
- Departamento de Química, Universidad Nacional de Río Cuarto , Agencia Postal # 3. C.P., X5804BYA Río Cuarto, Argentina
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Kar B, Bardhan S, Kundu K, Saha SK, Paul BK, Das S. Physicochemical studies of water-in-oil nonionic microemulsion in presence of benzimidazole-based ionic liquid and probing of microenvironment using model C–C cross coupling (Heck) reaction. RSC Adv 2014. [DOI: 10.1039/c3ra46632a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Blach D, Silber JJ, Correa NM, Falcone RD. Electron donor ionic liquids entrapped in anionic and cationic reverse micelles. Effects of the interface on the ionic liquid–surfactant interactions. Phys Chem Chem Phys 2013; 15:16746-57. [DOI: 10.1039/c3cp52273c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ferreyra DD, Correa NM, Silber JJ, Falcone RD. The effect of different interfaces and confinement on the structure of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide entrapped in cationic and anionic reverse micelles. Phys Chem Chem Phys 2012; 14:3460-70. [DOI: 10.1039/c2cp23481e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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