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Hleli B, Medoš Ž, Ogrin P, Tošner Z, Kereïche S, Gradzielski M, Urbič T, Bešter-Rogač M, Matějíček P. Closo-dodecaborate-based dianionic surfactants with distorted classical morphology: Synthesis and atypical micellization in water. J Colloid Interface Sci 2023; 648:809-819. [PMID: 37327624 DOI: 10.1016/j.jcis.2023.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 05/18/2023] [Accepted: 06/04/2023] [Indexed: 06/18/2023]
Abstract
HYPOTHESIS To challenge the classical concept of step-like micellization of ionic surfactants with singular critical micelle concentration, novel amphiphilic compounds with bulky dianionic head and the alkoxy tail connected via short linker, which can complex sodium cations, were synthesized in the form of disodium salts. EXPERIMENT The surfactants were synthesized by opening of a dioxanate ring attached to closo-dodecaborate by activated alcohol, which allows for attachment of alkyloxy tails of desired length to boron cluster dianion. The synthesis of the compounds with high cationic purity (sodium salt) is described. Self-assembly of the surfactant compound at air/water interface and in bulk water was studied by tensiometry, light and small angle X-ray scattering, electron microscopy, NMR spectroscopy, MD simulations and by isothermal titration calorimetry, ITC. The peculiarities in the micelle structure and formation were revealed by thermodynamic modelling and MD simulations of the micellization process. FINDINGS In an atypical process, the surfactants self-assemble in water to form relatively small micelles, where the aggregation number is decreasing with the surfactant concentration. The extensive counterion binding is a key characteristic of the micelles. The analysis strongly indicates complex compensation between the degree of bound sodium ions and the aggregation number. For the first time, a three-step thermodynamic model was used to estimate the thermodynamic parameters associated with micellization process. Diverse micelles differing in size and counterion binding can (co-)exist in the solution over the broad concentration and temperature range. Thus, the concept of step-like micellization was found inappropriate for these types of micelles.
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Affiliation(s)
- Belhssen Hleli
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 40 Prague 2, Czech Republic
| | - Žiga Medoš
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Peter Ogrin
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Zdeněk Tošner
- NMR Laboratory, Faculty of Science, Charles University, Hlavova 2030/8, 128 40 Prague 2, Czech Republic
| | - Sami Kereïche
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University, 128 000 Prague 2, Czech Republic
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie Sekr. TC 7, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany
| | - Tomaž Urbič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Marija Bešter-Rogač
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
| | - Pavel Matějíček
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 40 Prague 2, Czech Republic.
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2
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Evaluation of antimicrobial properties of monocationic and dicationic surface-active ionic liquids. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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3
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Zeng G, Zhong C, Wang X, He X, Pu E. Micellization Thermodynamics, Interfacial Behavior, Salt-resistance and Wettability Alteration of Gemini Hybrid Fluorinated Surfactant. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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4
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Wang Z, Song H. Phase behaviors, properties and potential application of temperature-responsive microemulsions based on tropine ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Arif R, Nadeem M, Rizvi MMA, Shaheen A. Synthesis, Self‐Aggregation, Interfacial Behavior and Interaction Studies of Non‐ Cytotoxic Caffeinium‐Based Surface Active Ionic Liquids with Sodium Dodecyl Sulfate. ChemistrySelect 2022. [DOI: 10.1002/slct.202202689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rabia Arif
- Department of Chemistry Aligarh Muslim University Aligarh 202002 India
| | - Masood Nadeem
- Department of Biosciences, Genome Biology Lab Jamia Millia Islamia New Delhi 110025 India
| | - M. Moshahid Alam Rizvi
- Department of Biosciences, Genome Biology Lab Jamia Millia Islamia New Delhi 110025 India
| | - Arifa Shaheen
- Department of Chemistry Aligarh Muslim University Aligarh 202002 India
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6
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Wang Z, Song H. The synthesis of quaternary N-alkyl tropinium cationic surfactants and study on their properties: effect of temperature, hydrophobic chain length and anions. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133732] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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7
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Effect of hydroxyl group on foam features of hydroxyl-based anionic ionic liquid surfactant: Experimental and theoretical studies. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Kaur R, Kumar H, Kumar B, Singla M, Kumar V, Ghfar AA, Pandey S. Effect of amino acid on the surface adsorption and micellar properties of surface active ILs varying in cationic head groups. Heliyon 2022; 8:e10363. [PMID: 36082336 PMCID: PMC9445298 DOI: 10.1016/j.heliyon.2022.e10363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/19/2022] [Accepted: 08/15/2022] [Indexed: 11/25/2022] Open
Abstract
The interfacial along with bulk characteristics of the aqueous solutions of ILs with dissimilar cationic head group viz. 1-dodecyl-3-methylimidazolium bromide ([C12mim][Br]), and N-dodecyl-N-methylmorpholinium bromide ([Mor1,12][Br]) in the absence and the presence of an amino acid L-Methionine as an external additive have been examined by electrical conductivity, UV-Visible, surface tension, and DLS measurements. The CMC values, and the lowest maximum surface excess concentration (Гmax) achieved from all three techniques, and surface tension measurements respectively displayed more surface activity of the [C12mim][Br] than the [Mor1,12][Br]. Also, the morpholinium head group is less hazardous than imidazolium, it can be utilised to design ILs that are greener, mainly in combination with polar, small, and non-toxic side chains and anions.
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Fu D, Gao X, Wang J, Jiang H, Zheng M, Li P, Huang B, Kan K, Zhang X. Micellization and thermodynamics study of ester functionalized picoline-based ionic liquid surfactants in water. RSC Adv 2022; 12:14477-14484. [PMID: 35702243 PMCID: PMC9097595 DOI: 10.1039/d2ra01706g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/29/2022] [Indexed: 11/21/2022] Open
Abstract
A novel series of picoline-based ionic liquid surfactants, N-alkyoxycarbonyl-3-picoline bromides [C n Empy][Br] (n = 10, 12, 14), have been synthesized. The thermal stability, aggregation behavior and surface activity of the synthetic ionic liquid surfactants were investigated systematically though a series of methods, such as thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), tensiometry and conductivity. The thermodynamics of micellization of the ionic liquid surfactants solution were studied by using the conductivity method in the temperature range 278.15-318.15 K. The surface activity parameters and thermodynamics parameters were derived, respectively. The enthalpy-entropy compensation effect was further discussed by using relative thermodynamics parameters. It was found that the [C n Empy][Br] have moderate surface activity, and their critical micelle concentration (CMC) decreased with the ester-functionalized chain length and exhibited a U-shape with temperature. The calculation results of the thermodynamic parameters showed that the micellization processes of [C n Empy][Br] were spontaneous, endothermic at low temperature and exothermic at higher temperature.
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Affiliation(s)
- Dong Fu
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China .,College of Materials Science and Chemical Engineering, Harbin Engineering University Harbin P. R. China
| | - Xiaoru Gao
- Harbin Fiber Reinforced Plastic Institute Harbin P. R. China
| | - Jue Wang
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
| | - Haijian Jiang
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
| | - Mingming Zheng
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
| | - Peng Li
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
| | - Bo Huang
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
| | - Kan Kan
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
| | - Xiaochen Zhang
- Heilongjiang Academy of Sciences, Institute of Advanced Technology Harbin P. R. China
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A thermodynamic investigation of the effect of cationic structure on the self-aggregation behavior of Surface-Active ionic liquids in the presence of an amino acid. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118904] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Hu K, Ouyang M, Jiang Q, Zhang H, Kong M, Wang G, Zhuang L. Experimental and DFT studies on micellization features of anionic surface active ionic liquid and nonionic surfactant mixtures: Effect of imidazolium cations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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12
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A density functional theory study on the water aggregation behaviour of fatty acid-based anionic surface active ionic liquids. Struct Chem 2022. [DOI: 10.1007/s11224-022-01910-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Patel NN, Patel K, Sastry NV, Patel VK, Macwan PM, Sharma DS, Panjabi SH. Halogen-free COOH functionalized surface-active ionic liquids: surface activity, aggregation behavior, and antimicrobial activity. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.2010565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nidhi N. Patel
- Department of Chemical Sciences, P.D. Patel Institute of Applied Sciences, Charusat, Changa, Gujarat, India
| | - Kiran Patel
- Department of Biological Sciences, P.D. Patel Institute of Applied Sciences, Charusat, Changa, Gujarat, India
| | - Nandhibatla V. Sastry
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, Gujarat, India
| | - Vaibhav K. Patel
- Department of Chemical Sciences, P.D. Patel Institute of Applied Sciences, Charusat, Changa, Gujarat, India
| | - Pradip M. Macwan
- B.N. Patel Institute of Paramedical & Sciences, Anand, Gujarat, India
| | - Deep S. Sharma
- Department of Chemical Sciences, P.D. Patel Institute of Applied Sciences, Charusat, Changa, Gujarat, India
| | - Sanjay. H. Panjabi
- Department of Chemical Sciences, P.D. Patel Institute of Applied Sciences, Charusat, Changa, Gujarat, India
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14
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Modulation of micellization behavior of imidazolium based surface active ionic liquids by aromatic anions in aqueous medium. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Unraveling the micellization behavior and thermodynamic characteristics of imidazolium-based ionic liquid in presence of vitamins thiamine hydrochloride and ascorbic acid. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127563] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Experimental and DFT studies on foam performances of lauryl ether sulfate-based anionic surface active ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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17
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F Garrido P, Rodríguez-Dafonte P, García-Río L, Piñeiro Á. Simple ApproximaTion for Aggregation Number Determination by Isothermal Titration Calorimetry: STAND-ITC. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11781-11792. [PMID: 34570499 DOI: 10.1021/acs.langmuir.1c01727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A new proposal to obtain aggregation numbers from isothermal titration calorimetry dilution experiments is described and tested using dodecyl trimethyl ammonium bromide, dodecyl methylimidazolium chloride, dodecyl methylimidazolium sulfonate, and didecyl methylimidazolium chloride aqueous solutions at different temperatures. The results were compared to those obtained from fluorescence measurements and also with data from the literature. In addition to the aggregation number, the molar free energy to transfer a solute molecule from the aggregate to the bulk solution, the enthalpy corresponding to the formation of the self-assembled suprastructures, the molar heat corresponding to the dilution of monomers and aggregates, and an offset parameter to account for unpredictable external contributions are simultaneously obtained using the same method. The new equations are compared to those obtained from previous proposals, and they are also analyzed in detail to assess the impact of each fitting parameter in the profile of the calorimetric isotherm. This new approach has been implemented in a computational code that automatically determines the fitting parameters as well as the corresponding statistical uncertainties for the large variety of calorimetric profiles that have been tested. Given the high sensitivity of the dilution experiments to the aggregation number for relatively small assemblies, our approach is proposed also to quantify the oligomerization state of biomolecules such as proteins and peptides.
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Affiliation(s)
- Pablo F Garrido
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Pedro Rodríguez-Dafonte
- CIQUS, Departamento de Quimica Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Luis García-Río
- CIQUS, Departamento de Quimica Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Ángel Piñeiro
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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18
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Spectroscopic characterization andthermal decomposition kinetics of 1,3-dibutyl-imidazolium bromide synthesized through a solvent-free and one-pot method. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117266] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Hu K, Zhang H, Kong M, Qin M, Ouyang M, Jiang Q, Wang G, Zhuang L. Effect of alkyl chain length of imidazolium cations on foam properties of anionic surface active ionic liquids: Experimental and DFT studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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20
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Čobanov I, Šarac B, Medoš Ž, Tot A, Vraneš M, Gadžurić S, Bešter-Rogač M. Cation isomerism effect on micellization of pyridinium based surface-active ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116353] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Kahlon NK, Weber CC. Micellar Catalysis and Reactivity in Nanostructured Ionic Liquids: Two Sides of the Same Coin? Aust J Chem 2021. [DOI: 10.1071/ch21109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Kaczmarek DK, Gwiazdowska D, Juś K, Klejdysz T, Wojcieszak M, Materna K, Pernak J. Glycine betaine-based ionic liquids and their influence on bacteria, fungi, insects and plants. NEW J CHEM 2021. [DOI: 10.1039/d1nj00498k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Natural origin ionic liquids with betaine-based cations as new agrochemicals.
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Affiliation(s)
| | - Daniela Gwiazdowska
- Department of Natural Science and Quality Assurance
- Poznan University of Economics and Business
- Poznan 61-875
- Poland
| | - Krzysztof Juś
- Department of Natural Science and Quality Assurance
- Poznan University of Economics and Business
- Poznan 61-875
- Poland
| | - Tomasz Klejdysz
- Institute of Plant Protection – National Research Institute
- Poznan 60-318
- Poland
| | - Marta Wojcieszak
- Department of Chemical Technology
- Poznan University of Technology
- Poznan 60-965
- Poland
| | - Katarzyna Materna
- Department of Chemical Technology
- Poznan University of Technology
- Poznan 60-965
- Poland
| | - Juliusz Pernak
- Department of Chemical Technology
- Poznan University of Technology
- Poznan 60-965
- Poland
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23
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Experimental and DFT studies on surface properties of sulfonate-based surface active ionic liquids. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128258] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Domínguez-Arca V, Sabín J, Taboada P, García-Río L, Prieto G. Micellization thermodynamic behavior of gemini cationic surfactants. Modeling its adsorption at air/water interface. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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25
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Medoš Ž, Friesen S, Buchner R, Bešter-Rogač M. Interplay between aggregation number, micelle charge and hydration of catanionic surfactants. Phys Chem Chem Phys 2020; 22:9998-10009. [PMID: 32365150 DOI: 10.1039/d0cp00877j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Catanionic mixtures are commonly used in applications due to synergetic properties of both cationic and anionic surfactants. To better understand the mechanism of the micellization process of salt-free catanionic surfactants, alkyltrimethylammonium alkanecarboxylates, [CxMe3N]+[Cy]-, with medium to long alkyl chains on both cation and anion (x,y = 6-10), were investigated in aqueous solution by density and zeta potential measurements, isothermal titration calorimetry (ITC), and dielectric relaxation spectroscopy (DRS). The obtained ITC data was analysed with the help of a two-step model equation, yielding the thermodynamic parameters, micelle charge and aggregation numbers. Comparison with the "parent" decyltrimethylammonium chloride and sodium decanoate reveals that combined dehydration of both alkyl chains increases entropy upon micellization. In the first step neutral smaller micelles with partly dehydrated alkyl chains are formed, while in the second step larger charged micelles with fully dehydrated alkyl chains are equally favourable. At low temperature both formations are thermodynamically equivalent, while with increasing temperature neutral micelles become more entropically favourable and charged micelles more enthalpically favourable. The resulting average micelle charge and average aggregation number are decreasing with temperature. From the DRS spectra, effective hydration numbers of the free monomers and micelles were deduced and are comparable to the "parent" cationic surfactant micelles.
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Affiliation(s)
- Žiga Medoš
- Faculty of Chemistry and Chemical Technology, Večna pot 113, University of Ljubljana, SI-1000 Ljubljana, Slovenia.
| | - Sergej Friesen
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93053 Regensburg, Germany.
| | - Richard Buchner
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93053 Regensburg, Germany.
| | - Marija Bešter-Rogač
- Faculty of Chemistry and Chemical Technology, Večna pot 113, University of Ljubljana, SI-1000 Ljubljana, Slovenia.
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El-Dossoki FI, Abd El-Maksoud SAEH, Migahed MA, Gouda MM. Micellization and Solvation Properties of Newly Synthesized Imidazolium- and Aminium-Based Surfactants. ACS OMEGA 2020; 5:9429-9441. [PMID: 32363295 PMCID: PMC7191861 DOI: 10.1021/acsomega.0c00603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
This work aimed to study the solvation properties of newly synthesized cationic surfactants: 1-hexyl-1-methyl-1H-imidazol-1-ium bromide (R6Im), 1-dodecyl-1-methyl-1H-imidazol-1-ium bromide (R12Im), N,N,N-tributylhexan-1-aminium bromide (R6N4), and N,N,N-tributyldodecan-1-aminium bromide (R12N4) in water and ethanol-water solvents with a 0.237 mole fraction of ethanol at 298.15 K using conductivity, refractive index, surface tension, and density measurements. Critical micelle concentration (CMC) for the synthesized surfactants was determined and discussed. Thermodynamic parameters including association constant, molal volume, and polarizability were calculated and discussed. Some surface properties of surfactants including excess surface concentration and minimum area per molecule were also calculated and discussed. A good agreement was found between the CMC values obtained from different techniques, such as conductivity, refractive index, and surface tension. Imidazolium surfactants had been proved to decrease the CMC and increase the association constant with the increase of ethanol mole fraction, while tributylamine had been proved to increase the CMC and decrease the association constant with the increase of ethanol mole fraction. Also, imidazolium surfactants had been proved to have higher CMC than tributylamine, which may be related to higher solvation of imidazolium surfactants than that of tributylamine. Both surfactants (R12Im) and (R12N4) were proved to have lesser CMC.
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Affiliation(s)
| | | | - Mohamed A. Migahed
- Petroleum
Applications Department, Egyptian Petroleum
Research Institute (EPRI), Cairo 11727, Egypt
| | - Mahmoud M. Gouda
- Chemistry
Department, Faculty of Science, Port Said
University, Port Said 42522, Egypt
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Čobanov I, Šarac B, Medoš Ž, Tot A, Vraneš M, Gadžurić S, Bešter-Rogač M. Thermodynamic and computational study of isomerism effect at micellization of imidazolium based surface-active ionic liquids: Counterion structure. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112419] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Thoppil AA, Chennuri BK, Gardas RL. Thermodynamics and micellization behavior of ethanolammonium carboxylate surface active ionic liquids in aqueous media. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112116] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Fu D, Gao X, Wang J, Xie Y, Yang F, Sui X, Li P, Huang B, Zhang X, Kan K. Micellization, surface activities and thermodynamics study of dialkylpyridinium [C16pymCn][Br] (n = 1–4) in aqueous solutions. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1710528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Dong Fu
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Xiaoru Gao
- Harbin FRP Research Institute, Harbin, People’s Republic of China
| | - Jue Wang
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Yang Xie
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Fan Yang
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Xin Sui
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Peng Li
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Bo Huang
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Xiaochen Zhang
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
| | - Kan Kan
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, People’s Republic of China
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31
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Zehner B, Schmidt F, Korth W, Cokoja M, Jess A. Determination of the Critical Micelle Concentration of Imidazolium Ionic Liquids in Aqueous Hydrogen Peroxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16297-16303. [PMID: 31722181 DOI: 10.1021/acs.langmuir.9b02759] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The critical micelle concentrations (CMCs) of several imidazolium-based ionic liquids (ILs) in aqueous H2O2 (50 wt % in H2O) were determined by tensiometry, conductometry, and the rate of catalytic epoxidation of cis-cyclooctene. CMC values in aqueous H2O2 were significantly lower compared to values in pure water. In both H2O2 solution and water, the CMC of all ILs decreases with an increasing alkyl chain length and increases with a rising temperature. The degree of micelle ionization of 1-methyl-3-octylimidazolium tetrafluoroborate ([OMIM][BF4]) was calculated by conductometry in a temperature range of 22-70 °C.
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Affiliation(s)
- Bastian Zehner
- Chair of Chemical Engineering , University of Bayreuth , Universitätsstraße 30 , D-95440 Bayreuth , Germany
| | - Fabian Schmidt
- Chair of Inorganic and Metal-Organic Chemistry, Faculty of Chemistry and Catalysis Research Center , Technical University of Munich , Lichtenbergstraße 4 , D-85747 , Garching bei München , Germany
| | - Wolfgang Korth
- Chair of Chemical Engineering , University of Bayreuth , Universitätsstraße 30 , D-95440 Bayreuth , Germany
| | - Mirza Cokoja
- Chair of Inorganic and Metal-Organic Chemistry, Faculty of Chemistry and Catalysis Research Center , Technical University of Munich , Lichtenbergstraße 4 , D-85747 , Garching bei München , Germany
| | - Andreas Jess
- Chair of Chemical Engineering , University of Bayreuth , Universitätsstraße 30 , D-95440 Bayreuth , Germany
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32
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Singh O, Singla P, Aswal VK, Mahajan RK. Impact of Aromatic Counter-Ions Charge Delocalization on the Micellization Behavior of Surface-Active Ionic Liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14586-14595. [PMID: 31621330 DOI: 10.1021/acs.langmuir.9b02695] [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 nature of counter-ions governs the micellar and structural characteristics of surface-active ionic liquids (SAILs). Especially, the introduction of aromatic counter-ions significantly increases their surface adsorption and induces the formation of various types of aggregates like prolate ellipsoidal micelles, rodlike micelles, vesicles, lamellars, etc. The present study reports the role of charge delocalization of two different aromatic counter-ions in the micellization behavior of their respective SAILs in aqueous medium. For this purpose, we have synthesized two SAILs, namely, 1-tetradecyl-3-methylimidzolium phenolate [C14mim][PO] and 1-tetradecyl-3-methylimidzolium benzoate [C14mim][BZ]. The O-atom of phenolate (PO-) possesses negative charge, which is delocalized on its phenyl ring. Conversely, the negative charge of benzoate (BZ-) is not delocalized on its phenyl ring. The more hydrophobic BZ- counter-ion increases the hydrophobic interactions and reduces the electrostatic repulsions more efficiently as compared to PO-, which results in a lower critical micelle concentration (cmc) of [C14mim][BZ] than that of [C14mim][PO]. Interfacial properties obtained by tensiometry reveal better surface activity and absorption efficiency of [C14mim][BZ] as compared to [C14mim][PO]. The increase of cmc and degree of counter-ion binding (β) with the rise of temperature for both SAILs has been observed by conductometry. The decrease in the polarity of pyrene microenvironment explains the higher compactness of [C14mim][BZ] aggregates than that of [C14mim][PO], observed by fluorimetry. The position of PO- and BZ- is in the stern and palisade layers of C14mim+ aggregates, respectively, located by 1H NMR. The existence of prolate ellipsoidal micelles for both SAILs has been established by small-angle neutron scattering measurements. Thus, the interfacial and bulk properties of [C14mim][PO] lie somewhere in between those of the SAILs having perfect aromatic counter-ions, [C14mim][BZ], and the SAILs having regular inorganic counter-ions like Cl-, Br-, etc.
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Affiliation(s)
- Onkar Singh
- Department of Chemistry, UGC-Centre for Advanced Studies-I , Guru Nanak Dev University , Amritsar 143005 , India
| | - Pankaj Singla
- Department of Chemistry, UGC-Centre for Advanced Studies-I , Guru Nanak Dev University , Amritsar 143005 , India
| | - Vinod Kumar Aswal
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India
| | - Rakesh Kumar Mahajan
- Department of Chemistry, UGC-Centre for Advanced Studies-I , Guru Nanak Dev University , Amritsar 143005 , India
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33
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Liu T, Lei Q, Dong J, Li X, Lu Y, Zhou T. Light-responsive vesicles based on azobenzene containing imidazolium surfactants and sodium oleate. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04557-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Tan J, Xiong X, Yan P. Synthesis and Aggregation Behavior of Trisiloxane Ionic Liquids in Aqueous Solution. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jinglin Tan
- School of Chemical and Environmental EngineeringJiujiang University Jiujiang, 332005 China
- Jiangxi Province Engineering Research Center of Ecological Chemical Industry Jiujiang, 332005 China
| | - Xiaomei Xiong
- School of Chemical and Environmental EngineeringJiujiang University Jiujiang, 332005 China
| | - Ping Yan
- School of Chemical and Environmental EngineeringJiujiang University Jiujiang, 332005 China
- Jiangxi Province Engineering Research Center of Ecological Chemical Industry Jiujiang, 332005 China
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35
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Insights into the effect of imidazolium-based ionic liquids on chemical structure and hydrolytic activity of microbial lipase. Bioprocess Biosyst Eng 2019; 42:1235-1246. [DOI: 10.1007/s00449-019-02121-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/03/2019] [Indexed: 01/04/2023]
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36
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Medoš Ž, Plechkova NV, Friesen S, Buchner R, Bešter-Rogač M. Insight into the Hydration of Cationic Surfactants: A Thermodynamic and Dielectric Study of Functionalized Quaternary Ammonium Chlorides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3759-3772. [PMID: 30754971 PMCID: PMC6727610 DOI: 10.1021/acs.langmuir.8b03993] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/11/2019] [Indexed: 05/31/2023]
Abstract
Hydrophobic interactions are one of the main thermodynamic driving forces in self-assembly, folding, and association processes. To understand the dehydration-driven solvent exposure of hydrophobic surfaces, the micellization of functionalized decyldimethylammonium chlorides, XC10Me2N+Cl-, with a polar functional group, X = C2OH, C2OMe, C2OC2OMe, C2OOEt, together with the "reference" compound decyltrimethylammonium chloride, C10Me3N+Cl-, was investigated in aqueous solution by density measurements, isothermal titration calorimetry (ITC), and dielectric relaxation spectroscopy (DRS). From the density data, the apparent molar volumes of monomers and micelles were estimated, whereas the ITC data were analyzed with the help of a model equation, yielding the thermodynamic parameters and aggregation number. From the DRS spectra, effective hydration numbers of the free monomers and micelles were deduced. The comprehensive analysis of the obtained results shows that the thermodynamics of micellization are strongly affected by the nature of the functional group. Surprisingly, the hydration of micelles formed by surfactant cations with a single alkyl chain on quaternary ammonium is approximately the same, regardless of the alkyl chain length or functionalization of the headgroup. However, notable differences were found for the free monomers where increasing polarity lowers the effective hydration number.
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Affiliation(s)
- Žiga Medoš
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Natalia V. Plechkova
- QUILL,
The Queen’s University of Belfast, Stranmillis Road, Belfast, Northern Ireland BT9 5AG, U.K.
| | - Sergej Friesen
- Institut
für Physikalische und Theoretische Chemie, Universität Regensburg, 93053 Regensburg, Germany
| | - Richard Buchner
- Institut
für Physikalische und Theoretische Chemie, Universität Regensburg, 93053 Regensburg, Germany
| | - Marija Bešter-Rogač
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
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37
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Adam CG, Fortunato GG. Synthesis and Self‐Assembly Properties of New Surface‐Active 1‐Alkylimidazolium Ionic Liquids in Aqueous Media. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Claudia G. Adam
- IQAL, Instituto de Química del Litoral (UNL‐CONICET)Facultad de Ingeniería Química‐Universidad Nacional del Litoral Santiago del Estero 2829, (3000), Santa Fe Argentina
- Researcher from National Council of Scientific and Technical Research (CONICET) Godoy Cruz, 2290, Buenos Aires Argentina
| | - Graciela G. Fortunato
- IQAL, Instituto de Química del Litoral (UNL‐CONICET)Facultad de Ingeniería Química‐Universidad Nacional del Litoral Santiago del Estero 2829, (3000), Santa Fe Argentina
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38
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Fu D, Gao X, Huang B, Wang J, Sun Y, Zhang W, Kan K, Zhang X, Xie Y, Sui X. Micellization, surface activities and thermodynamics study of pyridinium-based ionic liquid surfactants in aqueous solution. RSC Adv 2019; 9:28799-28807. [PMID: 35529658 PMCID: PMC9071189 DOI: 10.1039/c9ra04226a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 09/01/2019] [Indexed: 11/21/2022] Open
Abstract
The micellization and surface activity properties of long-chain pyridinium ionic liquids n-alkyl-3-methylpyridinium bromide ([Cnmpy][Br], n: the carbon numbers of hydrophobic tails, n = 12, 14, 16) in aqueous solution were systematically investigated through electronic conductivity measurement, surface tension, and ultraviolet-absorption spectra. The surface chemical parameters and thermodynamics parameters were obtained. The [Cnmpy][Br] ionic liquids exhibit higher surface activities than conventional surfactants with corresponding alkyl chain lengths. The effects of inorganic salts (LiBr, NaBr, MgBr2), organic alcohols (C2H5OH, C3H7OH, C4H9OH, C5H11OH) and temperature on the critical micelle concentration (CMC) values of [Cnmpy][Br] aqueous solutions were also investigated. The CMC values remarkably decreased with the addition of inorganic salts. The CMC values increased slightly in the presence of ethanol, but decreased gradually as the chain length of the alcohol increased. The CMC values assumed a trend of decreasing and then increasing with the increase of temperature. The calculation results of thermodynamic parameters show that both adsorption and micellization processes of [Cnmpy][Br] are spontaneous; the enthalpy of [C12mpy][Br] is negative at 293.15 K and becomes negative with temperature increasing. For [C14mpy][Br] and [C16mpy][Br] this transition occurs at 288.15 K and the micellization process is entropy-driven in the investigated temperature range. This paper contains details on the micellization, surface activity properties, thermodynamics and effects of additives of [Cnmpy][Br].![]()
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Affiliation(s)
- Dong Fu
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Xiaoru Gao
- Harbin FRP Research Institute
- Harbin
- China
| | - Bo Huang
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Jue Wang
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Yao Sun
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Weijun Zhang
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Kan Kan
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Xiaochen Zhang
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Yang Xie
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
| | - Xin Sui
- Heilongjiang Academy of Sciences Institute of Advanced Technology
- Harbin
- China
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39
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Cognigni A, Palvögyi ÁM, Schröder C, Peterlik H, Müllner ARM, Zirbs R, Weil M, Bica K. Surface-Active Ionic Liquids in Catalytic Water Splitting. Aust J Chem 2019. [DOI: 10.1071/ch18104] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report the application of surface-active ionic liquids as ligands and optional reaction media in iridium-catalyzed water oxidations. Three novel catalysts with N,N-dialkylimidazolidin-2-ylidene ligands based on amphiphilic imidazolium ionic liquids were synthesized and characterized. Excellent turn-over frequencies of up to 0.92s−1 were obtained in catalytic water splitting, and activity was maintained for five consecutive catalytic cycles, with an overall turn-over number of 8967. The addition of external surface-active ionic liquid showed unexpected behaviour, because strongly enhanced initial reaction rates were observed.
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40
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Effect of cationic structure of surface active ionic liquids on their micellization: A thermodynamic study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.152] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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41
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Fernandez-Alvarez R, Medoš Ž, Tošner Z, Zhigunov A, Uchman M, Hervø-Hansen S, Lund M, Bešter-Rogač M, Matějíček P. Total Description of Intrinsic Amphiphile Aggregation: Calorimetry Study and Molecular Probing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14448-14457. [PMID: 30343575 DOI: 10.1021/acs.langmuir.8b03462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Isothermal titration calorimetry (ITC) is an apt tool for a total thermodynamic description of self-assembly of atypical amphiphiles such as anionic boron cluster compounds (COSAN) in water. Global fitting of ITC enthalpograms reveals remarkable features that differentiate COSAN from classical amphiphiles: (i) strong enthalpy and weak entropy contribution to the free energy of aggregation, (ii) low degree of counterion binding, and (iii) very low aggregation number, leading to deviations from the ideal closed association model. The counterion condensation obtained from the thermodynamic model was compared with the results of 7Li DOSY NMR of Li[COSAN] micelles, which allows direct tracking of Li cations. The basic thermodynamic study of COSAN alkaline salt aggregation was complemented by NMR and ITC experiments in dilute Li/NaCl and acetonitrile aqueous solutions of COSAN. The strong affinity of acetonitrile molecules to COSAN clusters was microscopically investigated by all-atomic molecular dynamics simulations. The impact of ionic strength on COSAN self-assembling was comparable to the behavior of classical amphiphiles, whereas even a small amount of acetonitrile cosolvent has a pronounced nonclassical character of COSAN aggregation. It demonstrates that large self-assembling changes are triggered by traces of organic solvents.
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Affiliation(s)
| | - Žiga Medoš
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | | | - Alexander Zhigunov
- Institute of Macromolecular Chemistry, v.v.i. , Academy of Sciences of the Czech Republic , Heyrovský Sq. 2 , 16206 Prague 6 , Czechia
| | | | - Stefan Hervø-Hansen
- Division of Theoretical Chemistry , University of Lund , P.O. Box 124, SE-22100 Lund , Sweden
| | - Mikael Lund
- Division of Theoretical Chemistry , University of Lund , P.O. Box 124, SE-22100 Lund , Sweden
| | - Marija Bešter-Rogač
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
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42
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Effect of molecular weight of poly(acrylic acid) on the interaction of oppositely charged ionic surfactant–polyelectrolyte mixtures. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.02.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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43
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Cláudio AFM, Cognigni A, de Faria EL, Silvestre AJ, Zirbs R, Freire MG, Bica K. Valorization of olive tree leaves: Extraction of oleanolic acid using aqueous solutions of surface-active ionic liquids. Sep Purif Technol 2018; 204:30-37. [PMID: 30319309 PMCID: PMC6179138 DOI: 10.1016/j.seppur.2018.04.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The global olive oil industry annually generates approximately 750,000-1,500,000 tons of Olea europaea leaves as waste that are typically burned for energy production. Yet, this agricultural by-product is a rich source of oleanolic acid, a high value triterpenic acid with outstanding pharmaceutical and nutraceutical activities. The present study focuses on the extraction of oleanolic acid from dried O. europaea leaves using aqueous solutions of surface-active ionic liquids as alternative solvents. A number of imidazolium-based ionic liquids with variable chain length, different anions and optional side-chain functionalization was synthesized and employed in the extraction of oleanolic acid. Ionic liquids with long alkyl chains remarkably enhance the solubility of oleanolic acid in water, thus being able to compete with the solubilities afforded by molecular organic solvents, such as chloroform. Consequently, they are suitable alternatives for the solid-liquid extraction of triterpenic acids from natural matrices and provide improved extraction yields of up to 2.5 wt% oleanolic acid extracted from olive tree leaves.
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Affiliation(s)
- Ana Filipa M. Cláudio
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Alice Cognigni
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria
| | - Emanuelle L.P. de Faria
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Armando J.D. Silvestre
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ronald Zirbs
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology (DNBT), University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Vienna, Austria
| | - Mara G. Freire
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Katharina Bica
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria
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44
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Interaction of cationic surfactant cetyltrimethylammonium bromide (CTAB) with hydrophilic ionic liquid 1‑butyl‑3‑methylimidazolium chloride [C4mim][Cl] at different temperatures – Conductometric and FT-IR spectroscopic study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.082] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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45
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Vázquez-Tato MP, Meijide F, Seijas JA, Fraga F, Vázquez Tato J. Analysis of an old controversy: The compensation temperature for micellization of surfactants. Adv Colloid Interface Sci 2018; 254:94-98. [PMID: 29580548 DOI: 10.1016/j.cis.2018.03.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/13/2018] [Accepted: 03/13/2018] [Indexed: 11/30/2022]
Abstract
The actual significance of the so-called compensation temperature Tc for micellization of surfactants is reviewed. It is demonstrated that it is possible to obtain as many Tc values as the number of temperature intervals in which the dependencies of enthalpy and entropy changes with temperature are analyzed. The value of each Tc will be the central value To of each temperature interval. These two facts suggest that Tc is simply such experimental To. Thus any physical interpretation derived from Tc is unfounded.
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Affiliation(s)
- M Pilar Vázquez-Tato
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
| | - Francisco Meijide
- Departamento de Química Física, Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
| | - Julio A Seijas
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
| | - Francisco Fraga
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
| | - José Vázquez Tato
- Departamento de Química Física, Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain.
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46
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Padsala S, Dharaiya N, Ray D, Aswal VK, Sastry NV, Bahadur P. Self-organization of mixtures of sodium oleate and imidazolium based surface active ionic liquids studied by tensiometry, rheology and neutron scattering. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.10.108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Schäffer J, Alber M, Korth W, Cokoja M, Jess A. Ionic Liquids as Micellar Agents in Perrhenate-catalysed Olefin Epoxidation. ChemistrySelect 2017. [DOI: 10.1002/slct.201702709] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Johannes Schäffer
- Chair of Chemical Engineering; University of Bayreuth; Universitätsstraße 30 95440 Bayreuth Germany
| | - Monika Alber
- Chair of Chemical Engineering; University of Bayreuth; Universitätsstraße 30 95440 Bayreuth Germany
| | - Wolfgang Korth
- Chair of Chemical Engineering; University of Bayreuth; Universitätsstraße 30 95440 Bayreuth Germany
| | - Mirza Cokoja
- Chair of Inorganic and Metal-Organic Chemistry; Technical University of Munich; Lichtenbergstraße 4 85748 Garching b. München Germany
| | - Andreas Jess
- Chair of Chemical Engineering; University of Bayreuth; Universitätsstraße 30 95440 Bayreuth Germany
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48
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Medoš Ž, Bešter-Rogač M. Two-Step Micellization Model: The Case of Long-Chain Carboxylates in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7722-7731. [PMID: 28708402 DOI: 10.1021/acs.langmuir.7b01700] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The micellization behavior of the long-chain carboxylates-sodium and potassium octanoate (NaC8 and KC8), sodium decanoate (NaC10), potassium decanoate (KC10), cesium decanoate (CsC10), choline decanoate (ChC10), and sodium dodecanoate (NaC12)-in aqueous solutions were studied using isothermal titration calorimetry (ITC) in the temperature range between 288.15 and 328.15 K. Experimental data were analyzed by help of an improved model treating the micellization process as a two-step process. Furthermore, consideration of the state of the stock and titrated solutions during the experiment allowed for the elimination of all usually used empirical parameters. The proposed approach represents thus an essential improvement of the thermodynamic analysis of the micellization process and turned out to be (only) effective for the description of the micellization at carboxylates with moderate alkyl chain length (C8 and C10). By fitting the model equation to the experimental data, all the thermodynamic parameters of micellization for both steps were estimated. It was found that the first step is endothermic and thus a solely entropy driven processes in the studied temperature range for all investigated systems. The same goes also for the second step, except for KC10, Cs10, and NaC12 where at temperatures above ∼320 K the micellization was detected as an exothermic process. The delicate balance between entropy and enthalpy results in weak temperature dependence of (negative) Gibbs free energy which turned out as almost counterion independent quantity. The carboxylic groups are namely able to form H-bonds with water molecules, and it is quite likely that they remain strongly hydrated even upon micellization. Thus, the interactions with counterions are less expressed in comparison to those observed by other ionic surfactants (alkyl sulfates and cationic surfactants), where the micellization process was found to be an exothermic process even below ∼300 K.
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Affiliation(s)
- Žiga Medoš
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Marija Bešter-Rogač
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
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49
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Zhao X, Zhu Y, Zhang C, Lei J, Ma Y, Du F. Positive charge pesticide nanoemulsions prepared by the phase inversion composition method with ionic liquids. RSC Adv 2017. [DOI: 10.1039/c7ra08653a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
We prepared highly stable positive charge nanoemulsions with ILs that possessed fine wetting and adhesive property on wheat leaf surfaces.
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Affiliation(s)
- Xin Zhao
- Department of Applied Chemistry
- College of Science
- China Agricultural University
- Beijing
- P. R. China
| | - Yanqiu Zhu
- Department of Applied Chemistry
- College of Science
- China Agricultural University
- Beijing
- P. R. China
| | - Chenhui Zhang
- Department of Applied Chemistry
- College of Science
- China Agricultural University
- Beijing
- P. R. China
| | - Jinmei Lei
- Department of Applied Chemistry
- College of Science
- China Agricultural University
- Beijing
- P. R. China
| | - Yue Ma
- Department of Applied Chemistry
- College of Science
- China Agricultural University
- Beijing
- P. R. China
| | - Fengpei Du
- Department of Applied Chemistry
- College of Science
- China Agricultural University
- Beijing
- P. R. China
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Taskin M, Cognigni A, Zirbs R, Reimhult E, Bica K. Surface-active ionic liquids for palladium-catalysed cross coupling in water: effect of ionic liquid concentration on the catalytically active species. RSC Adv 2017; 7:41144-41151. [PMID: 29308189 PMCID: PMC5708357 DOI: 10.1039/c7ra07757b] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/10/2017] [Indexed: 01/02/2023] Open
Abstract
We report the design and synthesis of surface-active ionic liquids for application in palladium-catalyzed cross coupling reactions.
We report the design and synthesis of surface-active ionic liquids for application in palladium-catalyzed cross coupling reactions. A series of dodecylimidazolium-based ionic liquids were applied as additives in the Heck reaction of ethyl acrylate and iodobenzene, and high yields of >90% could be obtained in water without the addition of further ligands. Our results indicate that the ionic liquid concentration in water is the key factor affecting the formation of the catalytically active species and hence the yield. Moreover, imidazolium-based ionic liquids that are able to form a carbene species differ significantly from conventional cationic surfactants, as a concentration dependent formation of the N-heterocyclic carbene complex was observed.
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Affiliation(s)
- Meltem Taskin
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163, 1060 Vienna, Austria. ; ; Tel: +43 1 58801 163601
| | - Alice Cognigni
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163, 1060 Vienna, Austria. ; ; Tel: +43 1 58801 163601
| | - Ronald Zirbs
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11-II, A-1190 Vienna, Austria
| | - Erik Reimhult
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11-II, A-1190 Vienna, Austria
| | - Katharina Bica
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163, 1060 Vienna, Austria. ; ; Tel: +43 1 58801 163601
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