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M. O. Lépori C, Soledad Orellano M, Mariano Correa N, Silber JJ, Darío Falcone R. Understanding the interfacial properties of bmim-AOT reverse micelles for their application as nanoreactors. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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2
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Dib N, Girardi VR, Silber JJ, Correa NM, Falcone RD. How the external solvent in biocompatible reverse micelles can improve the alkaline phosphatase behavior. Org Biomol Chem 2021; 19:4969-4977. [PMID: 34002175 DOI: 10.1039/d0ob02371j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the last decade, the nature of the nonpolar solvents that can be part of reverse micelles (RMs) has been the topic of several investigations to improve their applications. In this sense, the hydrolysis of 1-naphthyl phosphate catalyzed by the enzyme alkaline phosphatase (AP) was used as a probe to investigate the effect of the change of the external solvent on RMs formulated with the anionic surfactant sodium diethylhexyl sulfosuccinate (AOT). As external nonpolar solvents, two biocompatible lipophilic esters, isopropyl myristate and methyl laurate, and the traditional nonpolar solvents, n-heptane and benzene, were used. The results were compared among the RMs investigated and with the reaction in homogeneous media. Thus, the effect of the nanoconfinement as well as the impact of the replacement of a conventional external nonpolar solvent by biocompatible solvents were analyzed. The results indicate that the catalytic efficiency in the AOT RMs is larger than that in homogeneous media, denoting a different hydration level over the AP enzyme, which is directly related to the different degrees of nonpolar solvent penetration to the RM interface. Our findings demonstrated that toxic solvents such as n-heptane and benzene can be replaced by nontoxic ones (isopropyl myristate or methyl laurate) in AOT RMs without affecting the performance of micellar systems as nanoreactors, making them a green and promising alternative toward efficient and sustainable chemistry.
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Affiliation(s)
- Nahir Dib
- Departamento de Química, Universidad Nacional de Rio Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Rio Cuarto, Córdoba, Argentina and Instituto de Desarrollo Agroindustrial y de la Salud (IDAS), Universidad Nacional de Río Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Río Cuarto, Córdoba, Argentina.
| | - Valeria R Girardi
- Departamento de Química, Universidad Nacional de Rio Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Rio Cuarto, Córdoba, Argentina
| | - Juana J Silber
- Departamento de Química, Universidad Nacional de Rio Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Rio Cuarto, Córdoba, Argentina and Instituto de Desarrollo Agroindustrial y de la Salud (IDAS), Universidad Nacional de Río Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Río Cuarto, Córdoba, Argentina.
| | - N Mariano Correa
- Departamento de Química, Universidad Nacional de Rio Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Rio Cuarto, Córdoba, Argentina and Instituto de Desarrollo Agroindustrial y de la Salud (IDAS), Universidad Nacional de Río Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Río Cuarto, Córdoba, Argentina.
| | - R Dario Falcone
- Departamento de Química, Universidad Nacional de Rio Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Rio Cuarto, Córdoba, Argentina and Instituto de Desarrollo Agroindustrial y de la Salud (IDAS), Universidad Nacional de Río Cuarto, Agencia Postal 3, C.P. X5804BYA, Ruta Nacional 36, km 601, Río Cuarto, Córdoba, Argentina.
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Jiang K, Zhou G, Fang T, Liu X. Permeability of Vesicles for Imidazolium-Based Ionic Liquids in Aqueous Solution: A Molecular Dynamic Simulation Study. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06014] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kun Jiang
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Guohui Zhou
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Timing Fang
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Xiaomin Liu
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, China
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4
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Ghorbanizamani F, Moulahoum H, Zihnioglu F, Timur S. Self-assembled block copolymers in ionic liquids: Recent advances and practical applications. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Dib N, Falcone RD, García-Río L. Hydrolysis Reactions of Two Benzoyl Chlorides as a Probe to Investigate Reverse Micelles Formed by the Ionic Liquid-Surfactant bmim-AOT. J Org Chem 2020; 85:15006-15014. [PMID: 33147953 DOI: 10.1021/acs.joc.0c01740] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this work, two hydrolysis reactions were used as a probe to investigate the properties of reverse micelles (RMs) formed by the ionic liquid-surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT). The results were compared with those found for RMs generated with sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT). As external nonpolar solvents, n-heptane (n-Hp), isopropyl myristate (IPM), and methyl laurate (ML) were used. Thus, the effect of changing the Na+ cation by bmim+ was analyzed, as well as the impact of the replacement of a conventional external nonpolar solvent by biocompatible solvents. The kinetics of the hydrolysis reactions of 4-methoxybenzoyl chloride (OMe) and 4-(trifluoromethyl)benzoyl chloride (CF3) were studied. The results indicate that the replacement of the Na+ counterion by bmim+ in AOT RMs alters the rates of reactions carried out in them and produces changes in the reaction mechanism. In bmim-AOT RMs, the bmim+ cation is located between the surfactant molecules; this has an important influence on the reaction intermediates' stability and, therefore, in the reaction rates and mechanisms. Also, the results indicate that when IPM is used as an external solvent instead of ML or n-Hp, interfacial water molecules have larger nucleophilicity due to the higher interface penetration of IPM.
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Affiliation(s)
- Nahir Dib
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET, Departamento de Quı́mica, Universidad Nacional de Rı́o Cuarto, Agencia Postal # 3, C.P. X5804BYA Rı́o Cuarto, Argentina
| | - R Dario Falcone
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET, Departamento de Quı́mica, Universidad Nacional de Rı́o Cuarto, Agencia Postal # 3, C.P. X5804BYA Rı́o Cuarto, Argentina
| | - Luis García-Río
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Quı́mica Fı́sica, Universidade de Santiago de Compostela, 15782 Santiago, Spain
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6
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Lépori CMO, Correa NM, Silber JJ, Falcone RD, López-López M, Moyá ML. Influence of the AOT Counterion Chemical Structure on the Generation of Organized Systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10785-10793. [PMID: 32830497 DOI: 10.1021/acs.langmuir.0c01575] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The impact of the imidazolium counterion structure on the organized systems formed by the surfactant 1,4-bis-2-ethylhexylsulfosuccinate, AOT, both in aqueous solutions and in nonpolar solvents is investigated. With this in mind, we investigated if the ionic liquid-like (IL-like) surfactant 1-ethyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate, emim-AOT, forms direct micelles or vesicles in water. Dynamic light scattering, zeta potential, conductivity, fluorescence spectroscopy, and UV-visible spectroscopy measurements were performed to characterize the organized systems in aqueous solutions. We also studied the self-aggregation of emim-AOT, 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate, bmim-AOT, and of 1-hexyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate, hmim-AOT, in nonpolar solvents. The results obtained showed that the IL-like surfactant emim-AOT forms direct micelles in water, as sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) does. However, emim-AOT aggregates are larger, have a lower surface charge, are more stable, and have a more polar and less fluid micellar interface than Na-AOT micelles. It was also observed that emim-AOT and hmim-AOT form reverse micelles in nonpolar solvents. The size of the imidazolium cations dramatically influences the size of the reverse micelles and their ability to solubilize water.
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Affiliation(s)
- Cristian M O Lépori
- Instituto de Física Enrique Gaviola (IFEG), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Córdoba (UNC), Medina Allende s/n, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - N Mariano Correa
- Departamento de Química, Universidad Nacional de Río Cuarto (UNRC), Agencia Postal # 3, X5804BYA Río Cuarto, Argentina
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Agencia Postal # 3, X5804BYA Río Cuarto, Argentina
| | - Juana J Silber
- Departamento de Química, Universidad Nacional de Río Cuarto (UNRC), Agencia Postal # 3, X5804BYA Río Cuarto, Argentina
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Agencia Postal # 3, X5804BYA Río Cuarto, Argentina
| | - R Darío Falcone
- Departamento de Química, Universidad Nacional de Río Cuarto (UNRC), Agencia Postal # 3, X5804BYA Río Cuarto, Argentina
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Agencia Postal # 3, X5804BYA Río Cuarto, Argentina
| | - Manuel López-López
- Departamento de Ingeniería Química, Química Física y Ciencias de Materiales, Centro de Ciencia y Tecnología, Facultad de Ciencias Experimentales, Universidad de Huelva, Campus "El Carmen", E-21071 Huelva, Spain
| | - M Luisa Moyá
- Departamento de Química Física, Universidad de Sevilla, c/Prof. García González 1, 41012 Sevilla, Spain
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7
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Jiang K, Liu X, He H, Wang J, Zhang S. Insight into the formation and permeability of ionic liquid unilamellar vesicles by molecular dynamics simulation. SOFT MATTER 2020; 16:2605-2610. [PMID: 32096807 DOI: 10.1039/c9sm02339a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Unilamellar vesicles in solution could open up new horizons for reaction and material delivery, but the formation mechanism especially for the permeability of the small molecule through the vesicle membrane is still unknown. In this study, the formation and permeability of the unilamellar vesicles formed by the ionic liquid 1-dodecyl-3-methylimidazolium salicylate ([C12mim][Sal]) have been investigated by molecular dynamics simulation. Starting from a random distribution of ionic liquids, the entire process of vesicle formation could be observed on a nanosecond time scale, during which planar and cup-like structures are formed at the intermediate stage. Energy analysis reveals that the electrostatic interactions between cations and anions play a dominant role in forming and stabilizing the vesicle. Radial density distribution functions indicate that the final stable vesicle is a spherical bilayer structure. Besides, it was found that the structure of vesicles is maintained with the increase of temperature, while the water molecules in the vesicles could be completely exchanged quickly. These results suggest that vesicles may be beneficial for the enrichment or release of molecules.
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Affiliation(s)
- Kun Jiang
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, China.
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8
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Metal-based surface active ionic liquids: Self-assembling characteristics and C C bond functionalization of tertiary amines with TMSCN in aqueous micellar solutions. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Rajak A, Karan CK, Theato P, Das A. Supramolecularly cross-linked amphiphilic block copolymer assembly by the dipolar interaction of a merocyanine dye. Polym Chem 2020. [DOI: 10.1039/c9py01492f] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Dipolar interaction driven dimerization of a merocyanine (MC) dye has been exploited to achieve non-covalently crosslinked stable micelles in water and reverse micelles in toluene with emissive properties from a MC-pendant amphiphilic block copolymer.
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Affiliation(s)
- Aritra Rajak
- School of Applied and Interdisciplinary Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Chandan Kumar Karan
- School of Applied and Interdisciplinary Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Patrick Theato
- Institute for Chemical Technology and Polymer Chemistry
- Karlsruhe Institute of Technology (KIT)
- D-76131 Karlsruhe
- Germany
- Soft Matter Synthesis Laboratory
| | - Anindita Das
- School of Applied and Interdisciplinary Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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10
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Sadeghi S, Olieaei S. Capped cadmium sulfide quantum dots with a new ionic liquid as a fluorescent probe for sensitive detection of florfenicol in meat samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 223:117349. [PMID: 31319275 DOI: 10.1016/j.saa.2019.117349] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 06/17/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
The new ionic liquid capped CdS quantum dots (IL-CdS QDs) as a fluorescent probe was successfully synthesized by a hydrothermal method in a one step process and used for the facile and sensitive determination of florfenicol (FLF) in aqueous media. The new ionic liquid 3-(2-[(5-amino-1,3,4-thiadiazol-2-yl)thio]ethyl)-1-methyl-1H-imidazol-3-ium chloride (IL) was synthesized by introducing 5-amino-1,3,4-thiadiazole-2-thiol as a ligand onto the alkyl chain of the 1-chloroethyl-3-methylimidazolium chloride ILs. This task specific ionic liquid reagent was used for the capping of CdS QDs which played the role of recognition element of FLF. The IL-CdS QDs were characterized by Ultra Violet-Visible absorption -spectroscopy (UV-Vis absorption spectroscopy), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). Quenching of fluorescence intensity of the IL-CdS QDs was in proportion to the addition of FLF concentration. Under the optimum conditions, the fluorescence intensity ratio of IL-CdS QDs in the presence and absence of FLF versus FLF concentrations gave a linear response according to the Stern-Volmer equation from 0.1 to 20 μg mL-1 (0.3 to 56 μmol L-1) with a limit of detection 0.035 μg mL-1 (0.098 μmol L-1). The developed method was applied to the determination of FLF in fish and chicken meats with satisfactory results. This method revealed some advantages such as high sensitivity, precision and wide linear range to FLF. The proposed method can be utilized for rapid screening the quality of meat products.
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Affiliation(s)
- Susan Sadeghi
- Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran.
| | - Samieh Olieaei
- Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran
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11
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Nowicki J, Wójcik J, Muszyński M, Woszczyński P. Ultra-deep removal of thiophene from model oil, catalyzed by amphiphilic ionic liquids in reverse micellar system. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.105811] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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12
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Dib N, Falcone RD, Acuña A, García-Río L. Characterization of Reverse Micelles Formulated with the Ionic-Liquid-like Surfactant Bmim-AOT and Comparison with the Traditional Na-AOT: Dynamic Light Scattering, 1H NMR Spectroscopy, and Hydrolysis Reaction of Carbonate as a Probe. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12744-12753. [PMID: 31495176 DOI: 10.1021/acs.langmuir.9b01083] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The present study investigated how the presence of butylmethylimidazolium cation (bmim+) alters the interfacial properties of reverse micelles (RMs) created with the ionic liquid-like surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT), in comparison to sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) RMs, employing dynamic light scattering (DLS) and 1H NMR techniques. Moreover, through the hydrolysis reaction of bis(4-nitrophenyl)carbonate inside both RMs as reaction probe, interfacial properties changes were explored in more detail. The kinetic solvent isotope effect was also analyzed. Micellar systems were formed using n-heptane as external nonpolar solvent and water as the polar component. According to the DLS studies, water is encapsulated inside the organized media; however, a different tendency is observed depending on the cationic component of the surfactant. For Na-AOT system, the results suggest that the micellar shapes are probably spherical, while in the case of bmim-AOT, a transition from ellipsoidal to spherical micelles could be occurring when water is added. 1H NMR data show that water is structured differently when Na+ cation is replaced by bmim+; in bmim-AOT RMs, the interaction of water with the surfactant is weaker and the water hydrogen-bonding network is less disturbed than in Na-AOT RMs. Kinetic studies reveal that the hydrolysis reaction in bmim-AOT RMs was much more favorable in comparison to Na-AOT RMs. In addition, when water content decreases in bmim-AOT RMs, the hydrolysis reaction rate increases and the solvent isotope effect remains constant, while for Na-AOT solutions, both the reaction rate and the solvent isotope effect decrease. Our results indicate that bmim+ cation would be located in the surfactant layer in such a way the negative charge density in the interface is less than that in Na-AOT RMs, and the reaction is more favorable. Additionally, as 1H NMR studies reveal, the interfacial water molecules would be more available in bmim-AOT RMs to participate in the nucleophilic attack. Therefore, the present study evidences how the replacement of Na+ counterion by bmim+ alters the composition of the interface of AOT RMs.
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Affiliation(s)
- Nahir Dib
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Departamento de Química , Universidad Nacional de Río Cuarto , Agencia Postal # 3, CP X5804BYA Río Cuarto , Argentina
| | - R Dario Falcone
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), CONICET-UNRC, Departamento de Química , Universidad Nacional de Río Cuarto , Agencia Postal # 3, CP X5804BYA Río Cuarto , Argentina
| | - Angel Acuña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Física , Universidade de Santiago de Compostela , 15782 Santiago , Spain
| | - Luis García-Río
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Física , Universidade de Santiago de Compostela , 15782 Santiago , Spain
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13
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Debnath M, Sasmal S, Podder D, Haldar D. Pentapeptide Nanoreactor as a Platform for Halogenations, Diels-Alder Reaction, and Morita-Baylis-Hillman Reaction. ACS OMEGA 2019; 4:13872-13878. [PMID: 31497704 PMCID: PMC6714524 DOI: 10.1021/acsomega.9b01393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 07/30/2019] [Indexed: 05/15/2023]
Abstract
A pentapeptide nanoreactor has been designed and synthesized as a platform to carry out the traditional organic reactions such as bromination, iodination, cycloaddition, and condensation reactions. The pentapeptide Boc-Phe-Phe-Aib-Phe-Phe-OMe with a supramolecular helical structure and π-rich channel provides nanoconfinements and thus facilitates the organic reactions. Bromination and iodination of aniline take place without any halogen carrier (Lewis acid) in the pentapeptide platform. Iodination produced p-iodoaniline only. The Diels-Alder reaction between furan and maleic anhydride increased 2-fold in the pentapeptide platform and the Morita-Baylis-Hillman reaction of benzaldehyde and ethyl acrylate in methanol enhanced 1.5-fold.
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14
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Balachandran VS, Divya KP, Samateh M, Sagiri SS, Satapathy S, Pradhan P, Raghavan SR, Rakesh L, Sellers MS, Karna SP, John G. Freestanding organogels by molecular velcro of unsaturated amphiphiles. SOFT MATTER 2019; 15:6263-6268. [PMID: 31312826 DOI: 10.1039/c9sm00378a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A simple amphiphile, N-cardanyltaurine amide (NCT) with different degrees of cis-unsaturation in its tail resulted in the formation of strong organogels. Interestingly, this is in contrast to the commonly accepted notion that introducing unsaturation in alkyl chains enhances fluidity in lipid assemblies. The physico-chemical and first-principles DFT calculations confirmed the pegging of 'kinked' unsaturated side chains, where the hydrophobic interlocking as in Velcro fasteners leads to a network of cylindrical micelles, resulting in self-standing organogels. Textural profile analysis and spectroscopic details substantiated the dynamic assembly to resemble a 3D network of gelators rather than being a cross-linked or polymerized matrix of monomers.
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Affiliation(s)
- Vijai Shankar Balachandran
- Department of Chemistry and Biochemistry and Center for Discovery and Innovation, The City College of New York, 85 St. Nicholas Terrace, New York, NY 10031, USA.
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15
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Villa CC, Correa NM, Silber JJ, Falcone RD. Catanionic Reverse Micelles as an Optimal Microenvironment To Alter the Water Electron Donor Capacity in a S N2 Reaction. J Org Chem 2019; 84:1185-1191. [PMID: 30608687 DOI: 10.1021/acs.joc.8b02492] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of interfacial water entrapped in two types of catanionic reverse micelles (RMs) on the kinetic parameters of the SN2 reaction between dimethyl-4-nitrophenylsulfonium trifluoromethanesulfonate (S+) and n-butylamine (BuNH2) was explored. Two catanionic surfactants, composed of a mixture of oppositely charged ionic surfactants without their original counterions, were used to create the RMs. Thus, benzyl- n-hexadecyldimethylammonium 1,4-bis(2-ethylhexyl) sulfosuccinate (BHD-AOT) and cetyltrimethylammonium 1,4-bis(2-ethylhexyl) sulfosuccinate (CTA-AOT) were formed. Also, the well-known anionic surfactant sodium 1,4-bis(2-ethylhexyl) sulfosuccinate (Na-AOT) was employed as a comparison. Our results showed an important catalytic-like effect of all RMs investigated in comparison with a water-benzene mixture, and the rate constant values depend on the type of surfactant used. Faster reaction in BHD-AOT RMs than in CTA-AOT and Na-AOT RMs was observed. This behavior was attributed to the strong interaction (by hydrogen bonding with AOT anion and ion-dipole interaction with BHD+) between the entrapped water and the BHD-AOT interface, which reduces the solvation capacity of water on S+. In CTA-AOT (and Na-AOT) RMs, the water-interface interaction is weaker and the electron pairs of water can solvate S+ ions. In summary, the chemical structure of the counterion on the catanionic surfactant alters the interfacial region, allowing the progress of a reaction inside the RMs to be controlled.
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Affiliation(s)
- Cristian C Villa
- Programa de Química , Universidad del Quindío , Carrera 15 Calle 14 Norte C.P. 630004 Armenia , Colombia
| | - N Mariano Correa
- Departamento de Química , Universidad Nacional de Río Cuarto , Agencia Postal # 3 C.P. X5804BYA Río Cuarto , Argentina
| | - Juana J Silber
- Departamento de Química , Universidad Nacional de Río Cuarto , Agencia Postal # 3 C.P. X5804BYA Río Cuarto , Argentina
| | - R Dario Falcone
- Departamento de Química , Universidad Nacional de Río Cuarto , Agencia Postal # 3 C.P. X5804BYA Río Cuarto , Argentina
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16
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Damarla K, Rachuri Y, Suresh E, Kumar A. Nanoemulsions with All Ionic Liquid Components as Recyclable Nanoreactors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10081-10091. [PMID: 30053782 DOI: 10.1021/acs.langmuir.8b01909] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoemulsions (NEs) comprising ionic liquids (ILs); ethanolammonium formate (HO-EOAF), proliniumisopropylester dioctylsulfosuccinate ([ProC3][AOT]), and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, ([Bmim][NTf2]) as insoluble hydrophilic, surface active, and hydrophobic components have been constructed. This novel class of colloidal formulations exhibited several contrasting properties vis-à-vis conventional water-in-oil or water-in-ionic liquid or nonaqueous NEs such as (i) spontaneous formation, (ii) thermodynamic stability and isotropic nature, (iii) decrease of droplet size with increase in polar medium concentration, and (iv) high thermal and kinetic stability. Mechanisms and characteristics for such anomalies have been investigated by physical, spectroscopic, and imaging techniques. NEs have been demonstrated as versatile recyclable nanoreactors for user-friendly synthesis of materials such as metal-organic frameworks/light harvesting hybrid systems. We anticipate that this development will lead to the construction of several other need-based "all ionic-liquid nanoemulsions" in view of the flexibility provided by the tailoring nature of ILs.
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Affiliation(s)
- Krishnaiah Damarla
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-Central Salt and Marine Chemicals Research Institute , G. B. Marg Bhavnagar , Gujarat , 364002 , India
| | - Yadagiri Rachuri
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-Central Salt and Marine Chemicals Research Institute , G. B. Marg Bhavnagar , Gujarat , 364002 , India
| | - Eringathodi Suresh
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-Central Salt and Marine Chemicals Research Institute , G. B. Marg Bhavnagar , Gujarat , 364002 , India
| | - Arvind Kumar
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-Central Salt and Marine Chemicals Research Institute , G. B. Marg Bhavnagar , Gujarat , 364002 , India
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17
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Borunda T, Myers AJ, Mary Fisher J, Crans DC, Johnson MD. Confinement Effects on Chemical Equilibria: Pentacyano(Pyrazine)Ferrate(II) Stability Changes within Nanosized Droplets of Water. Molecules 2018; 23:E858. [PMID: 29642558 PMCID: PMC6016957 DOI: 10.3390/molecules23040858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 03/30/2018] [Accepted: 04/04/2018] [Indexed: 11/16/2022] Open
Abstract
Nanoscale confinement is known to impact properties of molecules and we observed changes in the reactivity of an iron coordination complex, pentacyano(pyrazine)ferrate(II). The confinement of two coordination complexes in a sodium AOT/isooctane reverse micellar (RM) water droplet was found to dramatically increase the hydrolysis rate of [Fe(CN)₅pyz]3- and change the monomer-dimer equilibria between [Fe(CN)₅pyz]3- and [Fe₂(CN)10pyz]6-. Combined UV-Vis and ¹H-NMR spectra of these complexes in RMs were analyzed and the position of the monomer-dimer equilibrium and the relative reaction times were determined at three different RM sizes. The data show that the hydrolysis rates (loss of pyrazine) are dramatically enhanced in RMs over bulk water and increase as the size of the RM decreases. Likewise, the monomer-dimer equilibrium changes to favor the formation of dimer as the RM size decreases. We conclude that the effects of the [Fe(CN)₅pyz]3- stability is related to its solvation within the RM.
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Affiliation(s)
- Teofilo Borunda
- Department of Chemistry & Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA.
| | - Alexander J Myers
- Department of Chemistry & Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA.
| | - J Mary Fisher
- Department of Chemistry, Colorado State University, Ft. Collins, CO 80523, USA.
| | - Debbie C Crans
- Department of Chemistry, Colorado State University, Ft. Collins, CO 80523, USA.
| | - Michael D Johnson
- Department of Chemistry & Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA.
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18
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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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Villa CC, Silber JJ, Falcone RD, Correa NM. Subtleties of catanionic surfactant reverse micelle assemblies revealed by a fluorescent molecular probe. Methods Appl Fluoresc 2017; 5:044001. [PMID: 28653961 DOI: 10.1088/2050-6120/aa7b64] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this work, the absorption and emission behavior of the cationic hemicyanine trans-4-[4-(dimethylamino)styryl]-N-methylpyridinium iodide (HC) in reverse micelles (RMs) formed by the catanionic surfactants benzyl-n-hexadecyldimethylammonium-1,4-bis-2-ethylhexylsulfosuccinate (AOT-BHD) and cetyltrimethylammonium-1,4-bis-2-ethylhexylsulfosuccinate (AOT-CTA) have been investigated. Our results show that the spectroscopic behavior of HC changes when the dye is dissolved in AOT-BHD or in AOT-CTA RMs. While HC undergoes an intramolecular charge-transfer process upon excitation in AOT-CTA RMs, in AOT-BHD RMs this process is inhibited due to a specific interaction between HC and the polar head group of the BHD+ cation. This implies that the chemical structure of CTA+ and BHD+ cations has a large impact on the excited stated from which HC emission occurs. Additionally, the structural difference between the two cations impacts on the water-RM interface interaction, which provides a way of controlling the solvation process in these RMs. Furthermore, differences in the interfacial fluidity between the two catanionic RMs is observed, a result that is particularly interesting with regard to these systems being used as nanoreactors.
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20
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Orellano MS, Porporatto C, Silber JJ, Falcone RD, Correa NM. AOT reverse micelles as versatile reaction media for chitosan nanoparticles synthesis. Carbohydr Polym 2017; 171:85-93. [DOI: 10.1016/j.carbpol.2017.04.074] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 03/07/2017] [Accepted: 04/24/2017] [Indexed: 10/19/2022]
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21
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Crosio MA, Silber JJ, Moyano F, Correa NM, Falcone RD. The Use of AOBH-DEHP Molecular Probe to Characterize BHDC Reverse Micelles Interfaces. Insights on the Interfacial Water Structure. ChemistrySelect 2017. [DOI: 10.1002/slct.201700361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Matías A. Crosio
- Departamento de Química; Universidad Nacional de Río Cuarto, Agencia Postal # 3. ( X5804ZAB ); Río Cuarto Argentina
| | - Juana J. Silber
- Departamento de Química; Universidad Nacional de Río Cuarto, Agencia Postal # 3. ( X5804ZAB ); Río Cuarto Argentina
| | - Fernando Moyano
- Departamento de Química; Universidad Nacional de Río Cuarto, Agencia Postal # 3. ( X5804ZAB ); Río Cuarto Argentina
| | - N. Mariano Correa
- Departamento de Química; Universidad Nacional de Río Cuarto, Agencia Postal # 3. ( X5804ZAB ); Río Cuarto Argentina
| | - R. Darío Falcone
- Departamento de Química; Universidad Nacional de Río Cuarto, Agencia Postal # 3. ( X5804ZAB ); Río Cuarto Argentina
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22
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23
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Glycine molecules in ionic liquid based reverse micelles: Investigation of structure and dynamics using molecular dynamics simulations. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.01.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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24
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Foroutan M, Fatemi SM, Esmaeilian F. A review of the structure and dynamics of nanoconfined water and ionic liquids via molecular dynamics simulation. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2017; 40:19. [PMID: 28229319 DOI: 10.1140/epje/i2017-11507-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 01/30/2017] [Indexed: 05/04/2023]
Abstract
During the past decade, the research on fluids in nanoconfined geometries has received considerable attention as a consequence of their wide applications in different fields. Several nanoconfined systems such as water and ionic liquids, together with an equally impressive array of nanoconfining media such as carbon nanotube, graphene and graphene oxide have received increasingly growing interest in the past years. Water is the first system that has been reviewed in this article, due to its important role in transport phenomena in environmental sciences. Water is often considered as a highly nanoconfined system, due to its reduction to a few layers of water molecules between the extended surface of large macromolecules. The second system discussed here is ionic liquids, which have been widely studied in the modern green chemistry movement. Considering the great importance of ionic liquids in industry, and also their oil/water counterpart, nanoconfined ionic liquid system has become an important area of research with many fascinating applications. Furthermore, the method of molecular dynamics simulation is one of the major tools in the theoretical study of water and ionic liquids in nanoconfinement, which increasingly has been joined with experimental procedures. In this way, the choice of water and ionic liquids in nanoconfinement is justified by applying molecular dynamics simulation approaches in this review article.
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Affiliation(s)
- Masumeh Foroutan
- Department of Physical Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
| | - S Mahmood Fatemi
- Department of Physical Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Farshad Esmaeilian
- Department of Physical Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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25
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Aferni AE, Guettari M, Tajouri T. Determination of the Water/AOT/Isooctane Reverse Micelles Size Parameters from Their Refractive Index Data. J SOLUTION CHEM 2017. [DOI: 10.1007/s10953-016-0563-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Blach D, Martínez O. F. Gold nanoparticles optical properties induced by water and an ionic liquid (bmimBF4) inside cationic reverse micelles. NEW J CHEM 2017. [DOI: 10.1039/c7nj01106g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polar solvent interactions at the interface are a key factor affecting the final properties of nanoparticles, including size, shape and crystallinity.
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Affiliation(s)
- Diana Blach
- Centro de Investigaciones en Catálisis - CICAT, Universidad Industrial de Santander, Escuela de Química
- Piedecuesta
- Colombia
| | - Fernando Martínez O.
- Centro de Investigaciones en Catálisis - CICAT, Universidad Industrial de Santander, Escuela de Química
- Piedecuesta
- Colombia
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Sripradite J, Miller SA, Johnson MD, Tongraar A, Crans DC. How Interfaces Affect the Acidity of the Anilinium Ion. Chemistry 2016; 22:3873-80. [DOI: 10.1002/chem.201504804] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Jarukorn Sripradite
- School of Chemistry; Institute of Science; Suranaree University of Technology; Nakhon Ratchasima 30000 Thailand
- Department of Chemistry; Colorado State University; Fort Collins CO 80523 USA
- College of Industrial Technology; King Mongkut's University of Technology North Bangkok; Bangkok 10800 Thailand
| | - Susannah A. Miller
- Department of Chemistry; Colorado State University; Fort Collins CO 80523 USA
| | - Michael D. Johnson
- Department of Chemistry and Biochemistry; New Mexico State University; Las Cruces NM 88003 USA
| | - Anan Tongraar
- School of Chemistry; Institute of Science; Suranaree University of Technology; Nakhon Ratchasima 30000 Thailand
| | - Debbie C. Crans
- Department of Chemistry; Colorado State University; Fort Collins CO 80523 USA
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28
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Sánchez-Lombardo I, Baruah B, Alvarez S, Werst KR, Segaline NA, Levinger NE, Crans DC. Size and shape trump charge in interactions of oxovanadates with self-assembled interfaces: application of continuous shape measure analysis to the decavanadate anion. NEW J CHEM 2016. [DOI: 10.1039/c5nj01788b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using 51V NMR spectroscopy, dynamic light scattering and continuous shape analysis to characterize two polyoxometalate-encapsulation in reverse micelles.
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Affiliation(s)
| | - Bharat Baruah
- Department of Chemistry
- Colorado State University
- Colorado 80523-1872
- USA
- Department of Chemistry
| | - Santiago Alvarez
- Departament de Química Inorganica
- Institut de Química Teorica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Katarina R. Werst
- Department of Chemistry
- Colorado State University
- Colorado 80523-1872
- USA
| | | | - Nancy E. Levinger
- Department of Chemistry
- Colorado State University
- Colorado 80523-1872
- USA
| | - Debbie C. Crans
- Department of Chemistry
- Colorado State University
- Colorado 80523-1872
- USA
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29
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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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30
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Damarla K, Bharmoria P, Rao KS, Gehlot PS, Kumar A. Illuminating microemulsions: ionic liquid–CdS quantum dots hybrid materials as potential white light harvesting systems. Chem Commun (Camb) 2016; 52:6320-3. [DOI: 10.1039/c6cc02133f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic liquid–CdS quantum dot hybrid materials have been shown to display balanced white light emission with very high quantum efficiency.
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Affiliation(s)
- Krishnaiah Damarla
- AcSIR
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
| | - Pankaj Bharmoria
- AcSIR
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
| | - K. Srinivasa Rao
- AcSIR
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
| | - Praveen Singh Gehlot
- AcSIR
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
| | - Arvind Kumar
- AcSIR
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- Salt and Marine Chemicals Division
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