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Bruckschlegel C, Pasquier C, Toquer G, Girard L, Odorico M, Lautru J, Diat O, Bauduin P. Toward Distinguishing between the Superchaotropic and Hydrophobic Characters of Nanometric-Sized Ions in Interaction with PEGylated Surfaces. J Phys Chem Lett 2024; 15:4229-4236. [PMID: 38634114 DOI: 10.1021/acs.jpclett.4c00710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
In this study, we explore the superchaotropic effect of various polyoxometalate or boron cluster nano-ions on hydrophilic neutral surfaces. Nano-ions, characterized by low charge densities, exhibit strong adsorption on non-ionic hydrophilic surfaces like PEGylated micelles. This adsorption phenomenon was attributed to the enthalpically favorable dehydration of nano-ions, the so-called superchaotropic effect. Here, we investigate the adsorption of three nano-ions, α-SiW12O404-, α-PW12O403-, and B12I122-, with decreasing charge density or increasing superchaotropicity (or hydrophobicity), on hydrophilic solid surfaces, PEGylated gold nanoparticles, and PEGylated gold-coated quartz crystal. Solid surfaces are devoid of hydrophobic regions, enabling the study of the subtle nuance between hydrophobic and superchaotropic effects. Unlike adsorption on PEGylated micelles, the adsorption constant decreases with a reduced charge density, aligning with the well-established principle that hydrophobic ions do not adsorb on hydrophilic surfaces. This research improves our understanding of the subtle difference between superchaotropic and hydrophobic effects in nano-ion adsorption phenomena.
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Affiliation(s)
- Christoph Bruckschlegel
- Institute of Analytical Chemistry, Chemo- and Biosensors University of Regensburg, 93053 Regensburg, Germany
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Coralie Pasquier
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Guillaume Toquer
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Luc Girard
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Michael Odorico
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Joseph Lautru
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
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Falaise C, Khlifi S, Bauduin P, Schmid P, Degrouard J, Leforestier A, Shepard W, Marrot J, Haouas M, Landy D, Mellot-Draznieks C, Cadot E. Cooperative Self-Assembly Process Involving Giant Toroidal Polyoxometalate as a Membrane Building Block in Nanoscale Vesicles. J Am Chem Soc 2024; 146:1501-1511. [PMID: 38189235 DOI: 10.1021/jacs.3c11004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
The self-assembly of organic amphiphilic species into various aggregates such as spherical or elongated micelles and cylinders up to the formation of lyotropic hexagonal or lamellar phases results from cooperative processes orchestrated by the hydrophobic effect, while those involving ionic inorganic polynuclear entities and nonionic organic components are still intriguing. Herein, we report on the supramolecular behavior of giant toroidal molybdenum blue-type polyoxometalate, namely, the {Mo154} species in the presence of n-octyl-β-glucoside (C8G1), widely used as a surfactant in biochemistry. Structural investigations were carried out using a set of complementary multiscale methods including single-crystal X-ray diffraction analysis supported by molecular modeling, small-angle X-ray scattering and cryo-TEM observations. In addition, liquid NMR, viscosimetry, surface tension measurement, and isothermal titration calorimetry provided further information to decipher the complex aggregation pathway. Elucidation of the assembly process reveals a rich scenario where the presence of the large {Mo154} anion disrupts the self-assembly of the C8G1, well-known to produce micelles, and induces striking successive phase transitions from fluid-to-gel and from gel-to-fluid. Herein, intimate organic-inorganic primary interactions arising from the superchaotropic nature of the {Mo154} lead to versatile nanoscopic hybrid C8G1-{Mo154} aggregates including crystalline discrete assemblies, smectic lamellar liquid crystals, and large uni- or multilamellar vesicles where the large torus {Mo154} acts a trans-membrane component.
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Affiliation(s)
- Clément Falaise
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France
| | - Soumaya Khlifi
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Université Montpellier, Marcoule 34199, France
| | - Philipp Schmid
- ICSM, CEA, CNRS, ENSCM, Université Montpellier, Marcoule 34199, France
| | - Jéril Degrouard
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay 91405, France
| | - Amélie Leforestier
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay 91405, France
| | - William Shepard
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France
| | - Mohamed Haouas
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France
| | - David Landy
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), ULCO, Dunkerque 59140, France
| | - Caroline Mellot-Draznieks
- Laboratoire de Chimie des Processus Biologiques, UMR CNRS 8229, Collège de France, Sorbonne Université, PSL Research University, Paris, Cedex 05 75231, France
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France
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Khlifi S, Yao S, Falaise C, Bauduin P, Guérineau V, Leclerc N, Haouas M, Salmi-Mani H, Roger P, Cadot E. Switchable Redox and Thermo-Responsive Supramolecular Polymers Based on Cyclodextrin-Polyoxometalate Tandem. Chemistry 2023:e202303815. [PMID: 38146753 DOI: 10.1002/chem.202303815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/17/2023] [Accepted: 12/20/2023] [Indexed: 12/27/2023]
Abstract
Supramolecular polymers built from stimuli-responsive host-guest interactions represent an attractive way of tailoring smart materials. Herein, we exploit the chaotropic effect of polyoxometalates and related host-guest properties to design unconventional polymer systems with reversible redox and thermo-responsive sol-gel transition. These supramolecular networks result from the association of cyclodextrin-based oligomers and Keggin-type POMs acting as electro-active crosslinking agents. The structure and the dynamics of such self-assembly systems have been investigated using a multiscale approach involving MALDI-TOF, viscosity measurements, cyclic voltammetry, 1 H-NMR (1D and DOSY), and Small-Angle X-ray Scattering. Our results reveal that the chaotropic effect corresponds to a powerful and efficient force that can be used to induce responsiveness in hybrid supramolecular oligomeric systems.
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Affiliation(s)
- Soumaya Khlifi
- Institut Lavoisier de Versailles, CNRS UMR 8180, UVSQ, Université Paris-Saclay, 78035, Versailles Cedex, France
| | - Sa Yao
- Institut Lavoisier de Versailles, CNRS UMR 8180, UVSQ, Université Paris-Saclay, 78035, Versailles Cedex, France
| | - Clément Falaise
- Institut Lavoisier de Versailles, CNRS UMR 8180, UVSQ, Université Paris-Saclay, 78035, Versailles Cedex, France
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, CNRS UMR 5257, CEA, Université de Marcoule, ENSCM, F-30207, Bagnols sur Cèze Cedex, France
| | - Vincent Guérineau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Saclay, 91198, Gif-sur-Yvette Cedex, France
| | - Nathalie Leclerc
- Institut Lavoisier de Versailles, CNRS UMR 8180, UVSQ, Université Paris-Saclay, 78035, Versailles Cedex, France
| | - Mohamed Haouas
- Institut Lavoisier de Versailles, CNRS UMR 8180, UVSQ, Université Paris-Saclay, 78035, Versailles Cedex, France
| | - Hanene Salmi-Mani
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Saclay, 91405, Orsay Cedex, France
| | - Philippe Roger
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Saclay, 91405, Orsay Cedex, France
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles, CNRS UMR 8180, UVSQ, Université Paris-Saclay, 78035, Versailles Cedex, France
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Micheau C, Ueda Y, Motokawa R, Bauduin P, Girard L, Diat O. Foam Flotation of Clay Particles Using a Bifunctional Amine Surfactant. Langmuir 2023. [PMID: 37503925 DOI: 10.1021/acs.langmuir.3c01213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Understanding clay flotation mechanisms has become a major concern because of the increasing level of environmental contamination of soil and ground water by heavy metals and radionuclides. Clays are often used as sorbents for extracting metals in indirect flotation processes but can function simultaneously as defoamers. However, how foam generation and stability depend on the molecular interactions between the clays and surfactant is still controversial. In the present study, an amine polyethoxylated surfactant was used as a bifunctional surfactant that collected clay particles and acted as a foaming agent in the flotation process. The pH conditions strongly affected the surfactant physicochemical properties, allowing the clay extraction efficiency to be tuned. The interfacial recovery factor of the clays almost reached 100% under acidic (pH < 6) and neutral (pH 6-10) conditions, whereas it was negative under alkaline conditions (pH > 10), contrary to expectations. To elucidate the mechanisms involved in the particle flotation process for each of the pH conditions, the bulk and foam phases were analyzed. The effects of electrostatic interactions between the solutes and multiscale structure on the clay extraction behavior were investigated by electrophoretic measurements, dynamic light scattering, small-angle neutron scattering, and image analysis. Based on these results, three flotation processes were found depending on pH range: surfactant foam fractionation at pH > 10; clay particle foam flotation at pH 6-10; and particle froth flotation at pH < 6.
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Affiliation(s)
- Cyril Micheau
- Materials Sciences Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Yuki Ueda
- Materials Sciences Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Ryuhei Motokawa
- Materials Sciences Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, BP 17171, Marcoule, 30207 Bagnols-sur-Cèze, France
| | - Luc Girard
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, BP 17171, Marcoule, 30207 Bagnols-sur-Cèze, France
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, BP 17171, Marcoule, 30207 Bagnols-sur-Cèze, France
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Hohenschutz M, Dufrêche JF, Diat O, Bauduin P. Correction to "When Ions Defy Electrostatics: The Case of Superchaotropic Nanoion Adsorption". J Phys Chem Lett 2023:5235. [PMID: 37262125 DOI: 10.1021/acs.jpclett.3c01501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Chazapi I, Diat O, Bauduin P. Aqueous solubilization of hydrophobic compounds by inorganic nano-ions: An unconventional mechanism. J Colloid Interface Sci 2023; 638:561-568. [PMID: 36773518 DOI: 10.1016/j.jcis.2023.01.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/27/2023]
Abstract
HYPOTHESIS Solubilization of hydrophobic compounds in water is commonly performed by using organic solubilizers such as hydrotropes, surfactants, co-solvents, and macrocycles to form host-guest complexes. 3,3'-commo-bis[closo-1,2-dicarba-3-cobaltadodecaborane] derivatives (COSANs) are fully inorganic and non-amphiphilic ionic boron clusters with nanometric size (nano-ions) showing superchaotropic properties as they strongly bind to neutral organic molecules. Therefore, we expect COSANs to act as solubilizers of sparingly water-soluble molecules, but with a mechanism different from all other organic solubilizers known so far. EXPERIMENTS The aqueous solubilization efficiency of COSANs towards butanol was evaluated by determining phase diagrams and comparing them to classical solubilizers. Nanostructuration of the mixture was studied using UV spectroscopy, small-angle X-ray, and neutron scattering with contrast variation. FINDINGS COSANs act as efficient aqueous solubilizers of medium-chain alcohols (0.6 < log P < 1.5). Unlike surfactants, COSAN is an efficient solubilizer in its monomeric state, at concentrations well below its critical aggregation concentration. Solubilization by COSAN takes place with a bi-dimensional anisotropic growth of COSAN/butanol co-assemblies, whereas solubilization by surfactant occurs via an isotropic swelling of micelles. Appealingly, COSANs/2-butanol co-assemblies efficiently solubilize more hydrophobic compounds with log P values up to around 6, offering new opportunities in many applied fields.
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Affiliation(s)
- Ioanna Chazapi
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Bagnols sur Cèze, France
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Bagnols sur Cèze, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Bagnols sur Cèze, France.
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Abstract
Nanometer-sized anions, like polyoxometalates and borate clusters, bind to nonionic hydrated matter driven by the chaotropic effect, which arises from the favorable dehydration of the ions. Herein, we evaluate the adsorption and activity coefficient of the superchaotropic Keggin polyoxometalate SiW12O404- (SiW) on nonionic surfactant (C8E4) micelles by modeling small-angle X-ray and neutron-scattering spectra. Neither hard sphere nor electrostatic repulsion models reproduce the experimental activity coefficient of adsorbed SiW ions on the micelles. However, the activity and binding of SiW on the micelles is well-described by a Langmuir adsorption isotherm. These results imply that adsorbed SiW ions are non-interacting and "create" around themselves adsorption sites on the micelle. The temperature dependence of the adsorption constant showed that the SiW adsorption is enthalpically driven and entropically unfavorable, in line with the typical chaotropic thermochemical signature. The adsorption enthalpy can be split into an electrostatic term and a water-recovery term to evaluate and qualitatively predict the superchaotropicity of a nanoion.
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Affiliation(s)
- Max Hohenschutz
- ICSM, CEA, CNRS, ENSCM, Univ. Montpellier, Marcoule, France, Centre de Marcoule, 30207 Bagnols-sur-Cèze, France
| | - Jean-François Dufrêche
- ICSM, CEA, CNRS, ENSCM, Univ. Montpellier, Marcoule, France, Centre de Marcoule, 30207 Bagnols-sur-Cèze, France
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ. Montpellier, Marcoule, France, Centre de Marcoule, 30207 Bagnols-sur-Cèze, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ. Montpellier, Marcoule, France, Centre de Marcoule, 30207 Bagnols-sur-Cèze, France
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Braun L, Hohenschutz M, Diat O, von Klitzing R, Bauduin P. Repulsive, but sticky - Insights into the non-ionic foam stabilization mechanism by superchaotropic nano-ions. J Colloid Interface Sci 2023; 641:437-448. [PMID: 36948099 DOI: 10.1016/j.jcis.2023.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/28/2023] [Accepted: 03/03/2023] [Indexed: 03/11/2023]
Abstract
HYPOTHESIS The superchaotropic Keggin polyoxometalate α-SiW12O404- (SiW) was recently shown to stabilize non-ionic surfactant (C18:1E10) foams owing to electrostatic repulsion that arises from the adsorption of SiW-ions to the foam interfaces. The precise mechanism of foam stabilization by SiW however remained unsolved. EXPERIMENTS Imaging and conductimetry were used on macroscopic foams to monitor the foam collapse under free drainage and small angle neutron scattering (SANS) at a given foam height allowed for the tracking of the evolution of film thickness under quasi-stationary conditions. Thin film pressure balance (TFPB) measurements enabled to quantify the resistance of single foam films to external pressure and to identify intra-film forces. FINDINGS At low SiW/surfactant ratios, the adsorption of SiW induces electrostatic repulsion within foam films. Above a concentration threshold corresponding to an adsorption saturation, excess of SiW screens the electrostatic repulsion that leads to thinner foam films. Despite screened electrostatics, the foam and single foam films remain very stable caused by an additional steric stabilizing force consistent with the presence of trapped micelles inside the foam films that bridge between the interfaces. These trapped micelles can serve as a surfactant reservoir, which promotes self-healing of the interface leading to much more resilient foam films in comparison to bare surfactant foams/films.
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Affiliation(s)
- Larissa Braun
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Darmstadt, Germany
| | - Max Hohenschutz
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France; RWTH Aachen University, Institute of Physical Chemistry, Landoltweg 2, 52074 Aachen, Germany
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Regine von Klitzing
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Darmstadt, Germany.
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France.
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Hohenschutz M, Bauduin P, Lopez CG, Förster B, Richtering W. Superchaotropic Nano-ion Binding as a Gelation Motif in Cellulose Ether Solutions. Angew Chem Int Ed Engl 2023; 62:e202210208. [PMID: 36346946 PMCID: PMC10107358 DOI: 10.1002/anie.202210208] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 10/19/2022] [Accepted: 11/08/2022] [Indexed: 11/10/2022]
Abstract
Nanometer-sized anions (nano-ions) like polyoxometalates and boron clusters exhibit so-called superchaotropic behavior, which describes their strong binding to hydrated non-ionic matter in water. We show here that nano-ions, at millimolar concentrations, dramatically enhance the viscosity and induce gelation of aqueous solutions of non-ionic cellulose ethers (CEs), a class of widely utilized polymers known for their thickening and gel-forming ability. These phenomena arise from an interplay of attractive forces and repulsive electrostatic forces between CE-chains upon nano-ion binding. The attractive forces manifest themselves as aggregation of CE-chains into a physically crosslinked polymer network (gel). In turn, the electrostatic repulsions hamper the viscosity increase and gelation. Superchaotropic nano-ion binding emerges as a novel and general physical crosslinking motif for CE-solutions and exceeds by far the conventional thickening effects of classical salts and ionic surfactants.
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Affiliation(s)
- Max Hohenschutz
- RWTH Aachen University, Institute of Physical Chemistry, Landoltweg 2, 52074, Aachen, Germany
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Carlos G Lopez
- RWTH Aachen University, Institute of Physical Chemistry, Landoltweg 2, 52074, Aachen, Germany
| | - Beate Förster
- Forschungszentrum Jülich GmbH, Ernst Ruska-Centrum für Mikroskopie und Spektroskopie mit Elektronen (ER-C-1), 52425, Jülich, Germany
| | - Walter Richtering
- RWTH Aachen University, Institute of Physical Chemistry, Landoltweg 2, 52074, Aachen, Germany.,DWI-Leibniz-Institute for Interactive Materials e.V., RWTH-Aachen University, Forckenbeckstraße 50, 52074, Aachen, Germany
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Hohenschutz M, Bauduin P, Lopez CG, Förster B, Richtering W. Superchaotropic Nano‐ion Binding as a Gelation Motif in Cellulose Ether Solutions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/anie.202217796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Max Hohenschutz
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen Germany
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule ICSM CEA CNRS ENSCM Univ Montpellier Marcoule France
| | - Carlos G. Lopez
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen Germany
| | - Beate Förster
- Forschungszentrum Jülich GmbH Ernst Ruska-Centrum für Mikroskopie und Spektroskopie mit Elektronen (ER−C-1) 52425 Jülich Germany
| | - Walter Richtering
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen Germany
- DWI – Leibniz-Institute for Interactive Materials e.V. RWTH-Aachen University Forckenbeckstraße 50 52074 Aachen Germany
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Hohenschutz M, Bauduin P, Lopez CG, Förster B, Richtering W. Superchaotropic Nano‐ion Binding as a Gelation Motif in Cellulose Ether Solutions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202217796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Max Hohenschutz
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen Germany
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule ICSM CEA CNRS ENSCM Univ Montpellier Marcoule France
| | - Carlos G. Lopez
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen Germany
| | - Beate Förster
- Forschungszentrum Jülich GmbH Ernst Ruska-Centrum für Mikroskopie und Spektroskopie mit Elektronen (ER−C-1) 52425 Jülich Germany
| | - Walter Richtering
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen Germany
- DWI – Leibniz-Institute for Interactive Materials e.V. RWTH-Aachen University Forckenbeckstraße 50 52074 Aachen Germany
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Lamolinairie J, Dollet B, Bridot JL, Bauduin P, Diat O, Chiappisi L. Probing foams from the nanometer to the millimeter scale by coupling small-angle neutron scattering, imaging, and electrical conductivity measurements. Soft Matter 2022; 18:8733-8747. [PMID: 36341841 DOI: 10.1039/d2sm01252a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Liquid foams are multi-scale structures whose structural characterization requires the combination of very different techniques. This inherently complex task is made more difficult by the fact that foams are also intrinsically unstable systems and that their properties are highly dependent on the production protocol and sample container. To tackle these issues, a new device has been developed that enables the simultaneous time-resolved investigation of foams by small-angle neutron scattering (SANS), electrical conductivity, and bubbles imaging. This device allows the characterization of the foam and its aging from nanometer up to centimeter scale in a single experiment. A specific SANS model was developed to quantitatively adjust the scattering intensity from the dry foam. Structural features such as the liquid fraction, specific surface area of the Plateau borders and inter-bubble films, and thin film thickness were deduced from this analysis, and some of these values were compared with values extracted from the other applied techniques. This approach has been applied to a surfactant-stabilized liquid foam under free drainage and the underlying foam destabilization mechanisms were discussed with unprecedented detail. For example, the information extracted from the image analysis and SANS data allows for the first time to determine the disjoining pressure vs. thickness isotherm in a real, draining foam.
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Affiliation(s)
- Julien Lamolinairie
- Institut Max von Laue - Paul Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France.
| | - Benjamin Dollet
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | | | - Pierre Bauduin
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - Olivier Diat
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - Leonardo Chiappisi
- Institut Max von Laue - Paul Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France.
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Hohenschutz M, Bauduin P, Lopez CG, Förster B, Richtering W. Superchaotropic Nano‐ion Binding as a Gelation Motif in Cellulose Ether Solutions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Max Hohenschutz
- RWTH Aachen University Institute of Physical Chemistry Landoltweg 2 52074 Aachen GERMANY
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule: Institut de Chimie Separative de Marcoule L2IA GERMANY
| | - Carlos G. Lopez
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Institute of Physical Chemistry GERMANY
| | - Beate Förster
- Forschungszentrum Jülich: Forschungszentrum Julich GmbH Ernst Ruska-Centrum für Mikroskopie und Spektroskopie mit Elektronen (ER-C-1) GERMANY
| | - Walter Richtering
- RWTH Aachen University Physical Chemistry Landoltweg 2 52056 Aachen GERMANY
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Schmid P, Hohenschutz M, Graß X, Witzmann M, Touraud D, Diat O, Pfitzner A, Bauduin P. Counterion effect on α-Keggin polyoxometalates in water: The peculiar role of H+ on their salting-in effect and co-assembly with organics. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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15
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Hohenschutz M, Grillo I, Dewhurst C, Schmid P, Girard L, Jonchère A, Diat O, Bauduin P. Superchaotropic nano-ions as foam stabilizers. J Colloid Interface Sci 2021; 603:141-147. [PMID: 34186391 DOI: 10.1016/j.jcis.2021.06.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 11/17/2022]
Abstract
HYPOTHESIS Weakly hydrated nanometric ions, called superchaotropes, were recently shown to adsorb strongly to non-ionic surfaces affecting drastically the surface's physical-chemical properties due to a charging effect. Superchaotropic ions could serve as stabilizing agents for non-ionic colloidal systems, such as non-ionic surfactant foams. EXPERIMENTS We study foams of the non-ionic surfactant BrijO10 (C18:1E10) without and in presence of the superchaotropic Keggin-ion SiW12O404- (SiW). The foams are investigated under free drainage conditions by image analysis and conductimetry to reveal the effect of SiW on the foam stability, liquid drainage, and bubble size. Additionally, small angle neutron scattering on the same foams, but in a dry quasi-stationary state, provides insight into effects of SiW on the foam films. FINDINGS SiW strongly stabilizes non-ionic surfactant foams at millimolar concentrations by inducing electrostatic repulsions between foam film interfaces resulting in thicker and monodisperse foam films. A similar effect is observed with the ionic surfactant sodium dodecylsulfate (SDS) but to a lesser extent and with a different mechanism. At the foam films' interface, SiW adsorbs to the polar non-ionic surfactant heads driven by the superchaotropic effect whereas DS- anchors between non-ionic surfactant alkyl chains by the hydrophobic effect. The potential of superchaotropic ions as foam stabilizers is herein demonstrated.
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Affiliation(s)
- Max Hohenschutz
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Isabelle Grillo
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Charles Dewhurst
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Philipp Schmid
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Luc Girard
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Alban Jonchère
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France.
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16
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Falaise C, Khlifi S, Bauduin P, Schmid P, Shepard W, Ivanov AA, Sokolov MN, Shestopalov MA, Abramov PA, Cordier S, Marrot J, Haouas M, Cadot E. “Host in Host” Supramolecular Core–Shell Type Systems Based on Giant Ring‐Shaped Polyoxometalates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Clément Falaise
- Institut Lavoisier de Versailles CNRS, UVSQ, Université Paris-Saclay Versailles France
| | - Soumaya Khlifi
- Institut Lavoisier de Versailles CNRS, UVSQ, Université Paris-Saclay Versailles France
| | - Pierre Bauduin
- ICSM, CEA CNRS ENSCM Université Montpellier 34199 Marcoule France
| | - Philipp Schmid
- ICSM, CEA CNRS ENSCM Université Montpellier 34199 Marcoule France
| | - William Shepard
- Synchrotron SOLEIL L'Orme des Merisiers Saint-Aubain BP 48 91192 Gif-sur-Yvette, CEDEX France
| | - Anton A. Ivanov
- Nikolaev Institute of Inorganic Chemistry SB RAS 630090 Novosibirsk Russia
| | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry SB RAS 630090 Novosibirsk Russia
| | | | - Pavel A. Abramov
- Nikolaev Institute of Inorganic Chemistry SB RAS 630090 Novosibirsk Russia
- South Ural State University, Prospekt Lenina, 76 454080 Chelyabinsk Russia
| | - Stéphane Cordier
- CNRS Institut des Sciences Chimiques de Rennes ISCR—UMR 6226 Univ Rennes 35000 Rennes France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles CNRS, UVSQ, Université Paris-Saclay Versailles France
| | - Mohamed Haouas
- Institut Lavoisier de Versailles CNRS, UVSQ, Université Paris-Saclay Versailles France
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles CNRS, UVSQ, Université Paris-Saclay Versailles France
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17
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Schmid P, Buchecker T, Khoshsima A, Touraud D, Diat O, Kunz W, Pfitzner A, Bauduin P. Self-assembly of a short amphiphile in water controlled by superchaotropic polyoxometalates: H4SiW12O40 vs. H3PW12O40. J Colloid Interface Sci 2021; 587:347-357. [DOI: 10.1016/j.jcis.2020.12.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 01/28/2023]
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18
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Falaise C, Khlifi S, Bauduin P, Schmid P, Shepard W, Ivanov AA, Sokolov MN, Shestopalov MA, Abramov PA, Cordier S, Marrot J, Haouas M, Cadot E. "Host in Host" Supramolecular Core-Shell Type Systems Based on Giant Ring-Shaped Polyoxometalates. Angew Chem Int Ed Engl 2021; 60:14146-14153. [PMID: 33724635 DOI: 10.1002/anie.202102507] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Indexed: 11/08/2022]
Abstract
Herein, we show how the chaotropic effect arising from reduced molybdate ions in acidified aqueous solution is able to amplify drastically weak supramolecular interactions. Time-resolved Small Angle X-ray Scattering (SAXS) analysis suggests that molybdenum-blue oligomeric species form huge aggregates in the presence of γ-cyclodextrin (γ-CD) which results in the fast formation of nanoscopic {Mo154 }-based host-guest species, while X-ray diffraction analysis reveals that the ending-point of the scenario results in an unprecedented three-component well-ordered core-shell-like motif. A similar arrangement was found by using preformed hexarhenium chalcogenide-type cluster [Re6 Te8 (CN)6 ]4- as exogenous guest. This seminal work brings better understanding of the self-assembly processes in general and gives new opportunities for practical applications in the design of complex multicomponent materials via the simplicity of the non-covalent chemistry.
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Affiliation(s)
- Clément Falaise
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles, France
| | - Soumaya Khlifi
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Université Montpellier, 34199, Marcoule, France
| | - Philipp Schmid
- ICSM, CEA, CNRS, ENSCM, Université Montpellier, 34199, Marcoule, France
| | - William Shepard
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubain BP 48, 91192, Gif-sur-Yvette, CEDEX, France
| | - Anton A Ivanov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 630090, Novosibirsk, Russia
| | - Maxim N Sokolov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 630090, Novosibirsk, Russia
| | | | - Pavel A Abramov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 630090, Novosibirsk, Russia.,South Ural State University, Prospekt Lenina, 76, 454080, Chelyabinsk, Russia
| | - Stéphane Cordier
- CNRS, Institut des Sciences Chimiques de Rennes, ISCR-UMR 6226, Univ Rennes, 35000, Rennes, France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles, France
| | - Mohamed Haouas
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles, France
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, Versailles, France
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19
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Yao S, Falaise C, Ivanov AA, Leclerc N, Hohenschutz M, Haouas M, Landy D, Shestopalov MA, Bauduin P, Cadot E. Hofmeister effect in the Keggin-type polyoxotungstate series. Inorg Chem Front 2021. [DOI: 10.1039/d0qi00902d] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The chaotropic character of Keggin-type polyoxotungstate anions was evaluated with respect to their ability to bind to γ-cyclodextrin (γ-CD) by varying the global charge density of the nanometer-sized polyanion.
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Affiliation(s)
- Sa Yao
- Institut Lavoisier de Versailles
- UMR 8180 CNRS
- UVSQ
- Université Paris-Saclay
- Versailles
| | - Clément Falaise
- Institut Lavoisier de Versailles
- UMR 8180 CNRS
- UVSQ
- Université Paris-Saclay
- Versailles
| | - Anton A. Ivanov
- Institut Lavoisier de Versailles
- UMR 8180 CNRS
- UVSQ
- Université Paris-Saclay
- Versailles
| | - Nathalie Leclerc
- Institut Lavoisier de Versailles
- UMR 8180 CNRS
- UVSQ
- Université Paris-Saclay
- Versailles
| | | | - Mohamed Haouas
- Institut Lavoisier de Versailles
- UMR 8180 CNRS
- UVSQ
- Université Paris-Saclay
- Versailles
| | - David Landy
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, UR 4492)
- ULCO
- Dunkerque
- France
| | | | | | - Emmanuel Cadot
- Institut Lavoisier de Versailles
- UMR 8180 CNRS
- UVSQ
- Université Paris-Saclay
- Versailles
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20
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Merhi T, Jonchère A, Girard L, Diat O, Nuez M, Viñas C, Bauduin P. Highlights on the Binding of Cobalta-Bis-(Dicarbollide) with Glucose Units. Chemistry 2020; 26:13935-13947. [PMID: 32628301 DOI: 10.1002/chem.202002123] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/18/2020] [Indexed: 12/13/2022]
Abstract
Metalla-bis-dicarbollides, such as the cobalta-bis-dicarbollide (COSAN) anion [Co(C2 B9 H11 )2 ]- , have attracted much attention in biology but a deep understanding of their interactions with cell components is still missing. For this purpose, we studied the interactions of COSAN with the glucose moiety, which is ubiquitous at biological interfaces. Octyl-glucopyranoside surfactant (C8G1) was chosen as a model as it self-assembles in water and creates a hydrated glucose-covered interface. At low COSAN content and below the critical micellar concentration (CMC) of C8G1, COSAN binds to C8G1 monomers through the hydrophobic effect. Above the CMC of C8G1, COSAN adsorbs onto C8G1 micelles through the superchaotropic effect. At high COSAN concentrations, COSAN disrupts C8G1 micelles and the assemblies become similar to COSAN micelles but with a small amount of solubilized C8G1. Therefore, COSAN binds in a versatile way to C8G1 through either the hydrophobic or superchaotropic effect depending on their relative concentrations.
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Affiliation(s)
- Tania Merhi
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, 30207, Marcoule, France
| | - Alban Jonchère
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, 30207, Marcoule, France
| | - Luc Girard
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, 30207, Marcoule, France
| | - Olivier Diat
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, 30207, Marcoule, France
| | - Miquel Nuez
- Institute de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193, Bellaterra, Barcelona, Spain
| | - Clara Viñas
- Institute de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193, Bellaterra, Barcelona, Spain
| | - Pierre Bauduin
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, 30207, Marcoule, France
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21
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Hohenschutz M, Grillo I, Diat O, Bauduin P. How Nano-Ions Act Like Ionic Surfactants. Angew Chem Int Ed Engl 2020; 59:8084-8088. [PMID: 32125752 DOI: 10.1002/anie.201916193] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/24/2020] [Indexed: 12/20/2022]
Abstract
Recently, nanometric ions were shown to adsorb to hydrated neutral surfaces and to bind to the cavities of macrocyclic molecules with an unexpectedly strong affinity arising from a solvent-mediated effect named superchaotropicity. We show here that nano-ions at low concentrations (μm range), similarly to anionic surfactants, induce the spontaneous transformation of a swollen lyotropic lamellar phase of non-ionic surfactant into a vesicle phase. This transition occurs when the neutral lamellae acquire charges, either by adsorption of the nano-ions onto, or by anchoring of the ionic surfactant into the lamellae. In contrast to ionic surfactants, nano-ions strongly dehydrate the neutral surfactant assemblies. As a conclusion, these purely inorganic nanometric ions act as alternatives to the widely used organic ionic surfactants.
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Affiliation(s)
| | - Isabelle Grillo
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
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22
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Affiliation(s)
| | - Isabelle Grillo
- Institut Laue-Langevin (ILL) 71 Avenue des Martyrs 38000 Grenoble France
| | - Olivier Diat
- ICSMCEACNRSENSCMUniv Montpellier Marcoule France
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23
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Girard L, Naskar B, Dufrêche JF, Lai J, Diat O, Bauduin P. A thermodynamic model of non-ionic surfactants' micellization in the presence of polyoxometalates. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Buchecker T, Schmid P, Grillo I, Prévost S, Drechsler M, Diat O, Pfitzner A, Bauduin P. Self-Assembly of Short Chain Poly- N-isopropylacrylamid Induced by Superchaotropic Keggin Polyoxometalates: From Globules to Sheets. J Am Chem Soc 2019; 141:6890-6899. [PMID: 30951628 DOI: 10.1021/jacs.8b12181] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show here for the first time that short chain poly( N-isopropylacrylamide) (PNIPAM), one of the most famous thermoresponsive polymers, self-assembles in water to form (i) discrete nanometer-globules and (ii) micrometric sheets with nm-thickness upon addition of the well-known Keggin-type polyoxometalate (POM) H3PW12O40 (PW). The type of self-assembly is controlled by PW concentration: at low PW concentrations, PW adsorbs on PNIPAM chains to form globules consisting of homogeneously distributed PWs in PNIPAM droplets of several nm in size. Upon further addition of PW, a phase transition from globules to micrometric sheets is observed for PNIPAMs above a polymer critical chain length, between 18 and 44 repeating units. The thickness of the sheets is controlled by the PNIPAM chain length, here from 44 to 88 repeating units. The PNIPAM sheets are electrostatically stabilized PWs accumulated on each side of the sheets. The shortest PNIPAM chain with 18 repeating units produces PNIPAM/PW globules with 5-20 nm size but no sheets. The PW/PNIPAM self-assembly arises from a solvent mediated mechanism associated with the partial dehydration of PW and of the PNIPAM, which is related to the general propensity of POMs to adsorb on neutral hydrated surfaces. This effect, known as superchaotropy, is further highlighted by the significant increase in the lower critical solubilization temperature (LCST) of PNIPAM observed upon the addition of PW in the mM range. The influence of the POM nature on the self-assembly of PNIPAM was also investigated by using H4SiW12O40 (SiW) and H3PMo12O40 (PMo), i.e. changing the POM's charge density or polarizability in order to get deeper understanding on the role of electrostatics and polarizability in the PNIPAM self-assembly process. We show here that the superchaotropic behavior of POMs with PNIPAM polymers enables the formation and the shape control of supramolecular organic-inorganic hybrids.
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Affiliation(s)
- Thomas Buchecker
- Institute of Inorganic Chemistry, University of Regensburg , 93040 Regensburg , Germany.,ICSM, CEA, CNRS, ENSCM, Univ Montpellier , 34199 Marcoule , France
| | - Philipp Schmid
- Institute of Inorganic Chemistry, University of Regensburg , 93040 Regensburg , Germany.,ICSM, CEA, CNRS, ENSCM, Univ Montpellier , 34199 Marcoule , France
| | - Isabelle Grillo
- Institut Laue-Langevin , 6 rue Jules Horowitz , Grenoble Cedex 9 38042 , France
| | - Sylvain Prévost
- ESRF - The European Synchrotron Radiation Facility , 3800 Grenoble , France
| | - Markus Drechsler
- Laboratory of Soft Matter Electron Microscopy, University of Bayreuth , 95440 Bayreuth , Germany
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , 34199 Marcoule , France
| | - Arno Pfitzner
- Institute of Inorganic Chemistry, University of Regensburg , 93040 Regensburg , Germany
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , 34199 Marcoule , France
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25
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Hahn M, Krickl S, Buchecker T, Jošt G, Touraud D, Bauduin P, Pfitzner A, Klamt A, Kunz W. Ab initio prediction of structuring/mesoscale inhomogeneities in surfactant-free microemulsions and hydrogen-bonding-free microemulsions. Phys Chem Chem Phys 2019; 21:8054-8066. [DOI: 10.1039/c8cp07544a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Prediction of microemulsion-like structuring in surfactant-free and hydrogen-bonding-free systems.
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Affiliation(s)
- Maximilian Hahn
- COSMOlogic GmbH & Co. KG
- Imbacher Weg 46
- 51379 Leverkusen
- Germany
- Institute of Physical and Theoretical Chemistry
| | - Sebastian Krickl
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Thomas Buchecker
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Gašper Jošt
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Didier Touraud
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule (ICSM)
- UMR 5257 (CEA, CNRS, UM, ENSCM)
- BP 17171
- 30207 Bagnols-sur-Cèze
- France
| | - Arno Pfitzner
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Andreas Klamt
- COSMOlogic GmbH & Co. KG
- Imbacher Weg 46
- 51379 Leverkusen
- Germany
- Institute of Physical and Theoretical Chemistry
| | - Werner Kunz
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
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26
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Krickl S, Touraud D, Bauduin P, Zinn T, Kunz W. Enzyme activity of horseradish peroxidase in surfactant-free microemulsions. J Colloid Interface Sci 2018; 516:466-475. [DOI: 10.1016/j.jcis.2018.01.077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 11/28/2022]
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27
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Malinenko A, Jonchère A, Girard L, Parrès-Maynadié S, Diat O, Bauduin P. Are Keggin's POMs Charged Nanocolloids or Multicharged Anions? Langmuir 2018; 34:2026-2038. [PMID: 29278508 DOI: 10.1021/acs.langmuir.7b03640] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Owing to their multiple charges and their nanometric size, polyoxometalates (POMs) are at the frontier between ions and charged colloids. We investigated here the effect of POM-POM electrostatics repulsions on their self-diffusion in water by varying POM and supporting salt concentrations. The self-diffusion coefficients of two Keggin's POMs [silicotungstate (SiW12O404-) and phosphotungstate (PW12O403-)] were determined by dynamic light scattering (DLS) and 1H/31P DOSY NMR, whereas POM-POM electrostatic repulsions were investigated by the determination of the static structure factors using small-angle X-ray scattering (SAXS). The self-diffusion coefficients for the two POMs and for different POM/background salt concentrations were collected in a master curve by comparing the averaged POM-POM distance in solution to the Debye length. As for classical charged colloids, we show that the POM's counterions should not be considered in the calculation of the ionic strength that governs POM-POM electrostatic repulsions. This result was confirmed by fitting the POM-POM structure factor by considering a pair potential of spherical charged particles using the well-known Hayter mean spherical approximation (MSA). These Keggin POMs also behave as (super)chaotropic anions (i.e., they have a strong propensity to adsorb on (neutral polar) surfaces, which was also investigated) here on the surface of octyl-β-glucoside (C8G1) micelles. The variations of (i) the chemical shift of 1H/31P NMR signals and (ii) the self-diffusion coefficients obtained by DOSY 1H/31P NMR of PW3- and of C8G1 were in good agreement, confirming the strong adsorption of POMs on the micelle polar surface from static and dynamic points of view. We concluded that Keggin's POMs behave (i) as anions because they adsorb on surfaces as chaotropic anions and (ii) as colloids because they can be described by a classical colloidal approach by dynamic and static scattering techniques (i.e., by the investigation of their interparticle electrostatic structure factor and self-diffusion without considering the POM's counterions in the ionic strength calculation). This work highlights the dynamic properties of POMs at soft interfaces compared to bulk aqueous solution, which is essential in the understanding of functional properties of POMs, such as (photo)catalysis and the rational design of POM-based hybrid nanomaterials from soft templating routes (i.e., in aqueous solutions at room temperature).
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Affiliation(s)
- Alla Malinenko
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | - Alban Jonchère
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | - Luc Girard
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | | | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
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Abstract
We propose a simple experimental procedure based on the cloud point measurement of a non-ionic surfactant as a tool for (i) estimating the super-chaotropic behaviour of polyoxometalates (POMs) and for (ii) establishing a classification of POMs according to their affinity towards polar surfaces.
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Affiliation(s)
- Thomas Buchecker
- Institute of Inorganic Chemistry
- University of Regensburg
- Regensburg
- Germany
| | - Philipp Schmid
- Institute of Inorganic Chemistry
- University of Regensburg
- Regensburg
- Germany
| | - Séverine Renaudineau
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
| | | | - Anna Proust
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
| | - Arno Pfitzner
- Institute of Inorganic Chemistry
- University of Regensburg
- Regensburg
- Germany
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29
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Buchecker T, Le Goff X, Naskar B, Pfitzner A, Diat O, Bauduin P. Back Cover: Polyoxometalate/Polyethylene Glycol Interactions in Water: From Nanoassemblies in Water to Crystal Formation by Electrostatic Screening (Chem. Eur. J. 35/2017). Chemistry 2017. [DOI: 10.1002/chem.201701239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas Buchecker
- Institute of Inorganic Chemistry; University of Regensburg; 93040 Regensburg Germany
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
| | - Xavier Le Goff
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
| | - Bappaditya Naskar
- Department of Chemistry; Sundarban Hazi Desarat College; University of Calcutta; Pathankhali 743611 India
| | - Arno Pfitzner
- Institute of Inorganic Chemistry; University of Regensburg; 93040 Regensburg Germany
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
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30
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Buchecker T, Le Goff X, Naskar B, Pfitzner A, Diat O, Bauduin P. Polyoxometalate/Polyethylene Glycol Interactions in Water: From Nanoassemblies in Water to Crystal Formation by Electrostatic Screening. Chemistry 2017; 23:8434-8442. [DOI: 10.1002/chem.201700044] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Indexed: 01/28/2023]
Affiliation(s)
- Thomas Buchecker
- Institute of Inorganic Chemistry; University of Regensburg; 93040 Regensburg Germany
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
| | - Xavier Le Goff
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
| | - Bappaditya Naskar
- Department of Chemistry; Sundarban Hazi Desarat College; University of Calcutta; Pathankhali 743611 India
| | - Arno Pfitzner
- Institute of Inorganic Chemistry; University of Regensburg; 93040 Regensburg Germany
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule (ICSM); UMR 5257 (CEA, CNRS, UM, ENSCM), BP 17171; 30207 Bagnols-sur-Cèze France
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31
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Leclercq L, Bauduin P, Nardello-Rataj V. Supramolecular "Big Bang" in a Single-Ionic Surfactant/Water System Driven by Electrostatic Repulsion: From Vesicles to Micelles. Langmuir 2017; 33:3395-3403. [PMID: 28068101 DOI: 10.1021/acs.langmuir.6b04073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In aqueous solution, dimethyldi-n-octylammonium chloride, [DiC8][Cl], spontaneously forms dimers at low concentrations (1-10 mM) to decrease the strength of the hydrophobic-water contact. Dimers represent ideal building blocks for the abrupt edification of vesicles at 10 mM. These vesicles are fully characterized by dynamic and static light scattering, self-diffusion nuclear magnetic resonance, and freeze-fracture transmission electron microscopy. An increase in concentration leads to electrostatic repulsion between vesicles that explode into small micelles at 30 mM. These transitions are detected by means of surface tension, conductivity, and solubility of hydrophobic solutes as well as by isothermal titration microcalorimetry. These unusual supramolecular transitions emerge from the surfactant chemical structure that combines two contradictory features: (i) the double-chain structure tending to form low planar aggregates with low water solubility and (ii) the relatively short chains giving high hydrophilicity. The well-balanced hydrophilic-hydrophobic character of [DiC8][Cl] is then believed to be at the origin of the unusual supramolecular sequence offering new opportunities for drug delivery systems.
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Affiliation(s)
- Loïc Leclercq
- Univ. Lille , UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, UMR 5257, CEA/CNRS/UM2/ENSCM , BP 17171 CEA Marcoule, F-30207 Bagnols-sur-Cèze, France
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32
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Fadel O, Girard L, Gomes Rodrigues D, Bauduin P, Le Goff X, Rossignol-Castera A, L'Hermitte A, Diat O. Micellization in vegetable oils: A structural characterisation. Colloids Surf B Biointerfaces 2017; 154:279-286. [PMID: 28351800 DOI: 10.1016/j.colsurfb.2017.03.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/10/2017] [Accepted: 03/11/2017] [Indexed: 11/26/2022]
Abstract
The solubilisation of polar and polyphenol antioxidant in vegetable oils was studied. It was shown that the use of a polyglyceryl-3-diisostearate (PG3DS), a bio-sourced emulsifier well known in cosmetics, increases the yield of solubilisation thanks to some aggregation properties analysed using x-ray scattering technique. We show indeed that PG3DS forms reverse aggregates with a critical concentration that depends on the oil polarity. PG3DS reverse aggregates are elongated with a polar core and cannot be really swollen by addition of water. This supramolecular organisation allows however an efficient solubilisation of polar antioxidants in vegetable oils.
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Affiliation(s)
- Ophélie Fadel
- Institut de Chimie Separative de Marcoule, UMR 5257 (CEA, CNRS, Université de Montpellier, ENSCM), BP17171, 30207 Bagnols sur Cèze, France
| | - Luc Girard
- Institut de Chimie Separative de Marcoule, UMR 5257 (CEA, CNRS, Université de Montpellier, ENSCM), BP17171, 30207 Bagnols sur Cèze, France
| | - Donatien Gomes Rodrigues
- Institut de Chimie Separative de Marcoule, UMR 5257 (CEA, CNRS, Université de Montpellier, ENSCM), BP17171, 30207 Bagnols sur Cèze, France
| | - Pierre Bauduin
- Institut de Chimie Separative de Marcoule, UMR 5257 (CEA, CNRS, Université de Montpellier, ENSCM), BP17171, 30207 Bagnols sur Cèze, France
| | - Xavier Le Goff
- Institut de Chimie Separative de Marcoule, UMR 5257 (CEA, CNRS, Université de Montpellier, ENSCM), BP17171, 30207 Bagnols sur Cèze, France
| | | | - Annabelle L'Hermitte
- OLEOS SA/Hallstar France, 50 rue du Rajol, Fréjorgues Est, 34130 Mauguio, France
| | - Olivier Diat
- Institut de Chimie Separative de Marcoule, UMR 5257 (CEA, CNRS, Université de Montpellier, ENSCM), BP17171, 30207 Bagnols sur Cèze, France.
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33
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Buchecker T, Krickl S, Winkler R, Grillo I, Bauduin P, Touraud D, Pfitzner A, Kunz W. The impact of the structuring of hydrotropes in water on the mesoscale solubilisation of a third hydrophobic component. Phys Chem Chem Phys 2017; 19:1806-1816. [DOI: 10.1039/c6cp06696h] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complex structuring of alcohols in water influences the mesoscale solubilisation of a third component depending on its nature.
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Affiliation(s)
- Thomas Buchecker
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Sebastian Krickl
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Robert Winkler
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | | | - Pierre Bauduin
- Institut de chimie séparative de Marcoule (ICSM)
- UMR 5257 (CEA, CNRS, UM, ENSCM)
- 30207 Bagnols-sur-Cèze
- France
| | - Didier Touraud
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Arno Pfitzner
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Werner Kunz
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
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34
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Krickl S, Buchecker T, Meyer AU, Grillo I, Touraud D, Bauduin P, König B, Pfitzner A, Kunz W. A systematic study of the influence of mesoscale structuring on the kinetics of a chemical reaction. Phys Chem Chem Phys 2017; 19:23773-23780. [DOI: 10.1039/c7cp02134h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this contribution, we link the mesoscopic structuring of the binary structured solvent mixture H2O/tert-butanol (TBA) to the kinetics and efficacy of the oxidation of benzyl alcohol (BA) to the corresponding aldehyde catalyzed by H5PMo10V2O40.
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Affiliation(s)
- Sebastian Krickl
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Thomas Buchecker
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Andreas Uwe Meyer
- Institute of Organic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | | | - Didier Touraud
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule (ICSM)
- UMR 5257 (CEA, CNRS, UM, ENSCM)
- 30207 Bagnols-sur-Cèze
- France
| | - Burkhard König
- Institute of Organic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Arno Pfitzner
- Institute of Inorganic Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Werner Kunz
- Institute of Physical and Theoretical Chemistry
- University of Regensburg
- 93040 Regensburg
- Germany
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35
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Dedovets D, Bauduin P, Causse J, Girard L, Diat O. Switchable self-assembly of Prussian blue analogs nano-tiles triggered by salt stimulus. Phys Chem Chem Phys 2016; 18:3188-96. [DOI: 10.1039/c5cp06574g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We showed fully reversible, ionic strength controlled self-assembly of Prussian blue analogues nano-tiles into large superlattice structures.
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Affiliation(s)
- D. Dedovets
- Institut de Chimie Séparative de Marcoule ICSM
- UMR 5257
- CNRS/CEA/UM/ENSCM
- Bagnols-sur-Céze 30207
- France
| | - P. Bauduin
- Institut de Chimie Séparative de Marcoule ICSM
- UMR 5257
- CNRS/CEA/UM/ENSCM
- Bagnols-sur-Céze 30207
- France
| | - J. Causse
- Institut de Chimie Séparative de Marcoule ICSM
- UMR 5257
- CNRS/CEA/UM/ENSCM
- Bagnols-sur-Céze 30207
- France
| | - L. Girard
- Institut de Chimie Séparative de Marcoule ICSM
- UMR 5257
- CNRS/CEA/UM/ENSCM
- Bagnols-sur-Céze 30207
- France
| | - O. Diat
- Institut de Chimie Séparative de Marcoule ICSM
- UMR 5257
- CNRS/CEA/UM/ENSCM
- Bagnols-sur-Céze 30207
- France
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36
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Micheau C, Schneider A, Girard L, Bauduin P. Evaluation of ion separation coefficients by foam flotation using a carboxylate surfactant. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.049] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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37
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Gassin PM, Girard L, Martin-Gassin G, Brusselle D, Jonchère A, Diat O, Viñas C, Teixidor F, Bauduin P. Surface activity and molecular organization of metallacarboranes at the air-water interface revealed by nonlinear optics. Langmuir 2015; 31:2297-2303. [PMID: 25644035 DOI: 10.1021/acs.langmuir.5b00125] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Because of their amphiphilic structure, surfactants adsorb at the water-air interface with their hydrophobic tails pointing out of the water and their polar heads plunging into the liquid phase. Unlike classical surfactants, metallabisdicarbollides (MCs) do not have a well-defined amphiphilic structure. They are nanometer-sized inorganic anions with an ellipsoidal shape composed of two carborane semicages sandwiching a metal ion. However, MCs have been shown to share many properties with surfactants, such as self-assembly in water (formation of micelles and vesicles), formation of lamellar lyotropic phases, and surface activity. By combining second harmonic generation and surface tension measurement, we show here that cobaltabis(dicarbollide) anion {[(C2B9H11)2Co](-) also named [COSAN](-)} with H(+) as a counterion, the most representative metallacarborane, adsorbs vertically at the water surface with its long axis normal to the surface. This vertical molecular orientation facilitates the formation of intermolecular and nonconventional dihydrogen bonds such as the B-H(δ-)···(δ+)H-C bond that has recently been proven to be at the origin of the self-assembly of MCs in water. Therefore, it appears here that lateral dihydrogen bonds are also involved in the surface activity of MCs.
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Affiliation(s)
- Pierre-Marie Gassin
- Institut de Chimie Séparative de Marcoule, UMR 5257 (CEA-CNRS-UM-ENSCM) , B.P. 17171, 30207 Bagnols sur Cèze Cedex, France
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38
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Hong B, Leclercq L, Collinet-Fressancourt M, Lai J, Bauduin P, Aubry JM, Nardello-Rataj V. Synergy between bis(dimethyldioctylammonium) molybdate and tetraethylene glycol monooctyl ether: A winning combination for interfacial catalysis in thermo-controlled and switchable microemulsions. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2014.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Li Y, Fabiano-Tixier AS, Ruiz K, Rossignol Castera A, Bauduin P, Diat O, Chemat F. Comprehension of direct extraction of hydrophilic antioxidants using vegetable oils by polar paradox theory and small angle X-ray scattering analysis. Food Chem 2014; 173:873-80. [PMID: 25466101 DOI: 10.1016/j.foodchem.2014.10.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 09/14/2014] [Accepted: 10/11/2014] [Indexed: 11/28/2022]
Abstract
Since the polar paradox theory rationalised the fact that polar antioxidants are more effective in nonpolar media, extractions of phenolic compounds in vegetable oils were inspired and achieved in this study for obtaining oils enriched in phenolic compounds. Moreover, the influence of surfactants on the extractability of phenolic compounds was experimentally studied first, followed by the small angle X-ray scattering analysis for the oil structural observation before and after extraction so as to better understand the dissolving mechanism underpinning the extraction. The results showed a significant difference on the extraction yield of phenolic compounds among oils, which was mainly dependent on their composition instead of the unsaturation of fatty acids. Appropriate surfactant additions could significantly improve extraction yield for refined sunflower oils, which 1% w/w addition of glyceryl oleate was determined as the optimal. Besides, 5% w/w addition of lecithin performed the best in oil enrichments compared with mono- and di-glycerides.
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Affiliation(s)
- Ying Li
- Avignon University, INRA, SQPOV, UMR408, GREEN Extraction Team, F-84000 Avignon, France
| | | | - Karine Ruiz
- Avignon University, INRA, SQPOV, UMR408, GREEN Extraction Team, F-84000 Avignon, France
| | | | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, ICSM UMR 5257 (CEA/CNRS/UM2/ENSCM), 30206 Bagnols sur Cèze, France
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule, ICSM UMR 5257 (CEA/CNRS/UM2/ENSCM), 30206 Bagnols sur Cèze, France
| | - Farid Chemat
- Avignon University, INRA, SQPOV, UMR408, GREEN Extraction Team, F-84000 Avignon, France.
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40
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Leclercq L, Mouret A, Bauduin P, Nardello-Rataj V. Supramolecular colloidosomes based on tri(dodecyltrimethylammonium) phosphotungstate: a bottom-up approach. Langmuir 2014; 30:5386-5393. [PMID: 24784796 DOI: 10.1021/la500393s] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hybrid tri(dodecyldimethylammonium) phosphotungstate ([C12]3[PW12O40]) amphiphilic nanoparticles self-assemble in situ at the water/toluene interface to form stable water-in-oil (W/O) Pickering emulsions (droplet size ≈ 20 μm). These emulsions are used as a template for the preparation of colloidosomes (ϕ ≈ 5 μm), which are produced solely through the self-assembly properties of the [C12]3[PW12O40] nanoparticles into a "fused" phase on the water-drop surface in contact with toluene. The structure of the emulsions has been determined using optical and cross-polarized light microscopy, while the colloidosomes have been characterized by scanning electron microscopy (SEM). The structure as well as the aggregation behavior of these nanoparticles has been investigated. Small- and wide-angle X-ray scattering (SWAXS) and transmission electron microscopy (TEM) experiments have revealed a lamellar organization of the inorganic polyoxometalate anions because of the van der Waals interactions between the alkyl chains of the organic cations. According to the solvent, the internal molecular arrangement inside the nanoparticles can be modified: in water, the nanoparticles tend to aggregate in a lamellar structure, whereas in toluene, the nanoparticles are "fused" or coagulated.
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Affiliation(s)
- Loïc Leclercq
- Université Lille Nord de France, Université Lille 1 , EA 4478, Chimie Moléculaire et Formulation, F-59655 Villeneuve d'Ascq, France
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41
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Rodrigues F, Ferru G, Berthon L, Boubals N, Guilbaud P, Sorel C, Diat O, Bauduin P, Simonin J, Morel J, Morel-Desrosiers N, Charbonnel M. New insights into the extraction of uranium(VI) by an N,N-dialkylamide. Mol Phys 2014. [DOI: 10.1080/00268976.2014.902139] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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42
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Ferru G, Gomes Rodrigues D, Berthon L, Diat O, Bauduin P, Guilbaud P. Elucidation of the Structure of Organic Solutions in Solvent Extraction by Combining Molecular Dynamics and X-ray Scattering. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402677] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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43
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Ferru G, Gomes Rodrigues D, Berthon L, Diat O, Bauduin P, Guilbaud P. Elucidation of the Structure of Organic Solutions in Solvent Extraction by Combining Molecular Dynamics and X-ray Scattering. Angew Chem Int Ed Engl 2014; 53:5346-50. [DOI: 10.1002/anie.201402677] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Indexed: 01/10/2023]
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44
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45
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Jallet V, Guillemot G, Lai J, Bauduin P, Nardello-Rataj V, Proust A. Covalent amphiphilic polyoxometalates for the design of biphasic microemulsion systems. Chem Commun (Camb) 2014; 50:6610-2. [DOI: 10.1039/c4cc02695k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unprecedented stabilization of a Winsor I microemulsion has been achieved using a covalent polyoxotungstate amphiphile.
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Affiliation(s)
- V. Jallet
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS UMR 8232
- Institut Parisien de Chimie Moléculaire
- F-75005 Paris, France
| | - G. Guillemot
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS UMR 8232
- Institut Parisien de Chimie Moléculaire
- F-75005 Paris, France
| | - J. Lai
- Institut de Chimie Séparative de Marcoule
- UMR 5257 (CEA/CNRS/UM2/ENSCM) BP 17171
- 30207 Bagnols sur Cèze Cedex, France
| | - P. Bauduin
- Institut de Chimie Séparative de Marcoule
- UMR 5257 (CEA/CNRS/UM2/ENSCM) BP 17171
- 30207 Bagnols sur Cèze Cedex, France
| | - V. Nardello-Rataj
- Université Lille Nord de France
- EA 4478
- Chimie Moléculaire et Formulation
- F-59655 Villeneuve d'Ascq, France
| | - A. Proust
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS UMR 8232
- Institut Parisien de Chimie Moléculaire
- F-75005 Paris, France
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46
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Viñas C, Tarrés M, González-Cardoso P, Farràs P, Bauduin P, Teixidor F. Surfactant behaviour of metallacarboranes. A study based on the electrolysis of water. Dalton Trans 2014; 43:5062-8. [DOI: 10.1039/c3dt52825a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Hong B, Lai J, Leclercq L, Collinet-Fressancourt M, Aubry JM, Bauduin P, Nardello-Rataj V. Binary and Ternary Phase Behaviors of Short Double-Chain Quaternary Ammonium Amphiphiles: Surface Tension, Polarized Optical Microscopy, and SAXS Investigations. J Phys Chem B 2013; 117:14732-42. [DOI: 10.1021/jp406062b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Bing Hong
- Université Lille 1 and ENSCL, EA 4478
Chimie Moléculaire et Formulation, F-59655 Villeneuve d’Ascq Cedex, France
| | - Jonathan Lai
- Institut de Chimie
Séparative de Marcoule, UMR 5257
(CEA/CNRS/UM2/ENSCM) BP 17171, 30207 Bagnols sur Cèze Cedex, France
| | - Loïc Leclercq
- Université Lille 1 and ENSCL, EA 4478
Chimie Moléculaire et Formulation, F-59655 Villeneuve d’Ascq Cedex, France
| | - Marion Collinet-Fressancourt
- Université Lille 1 and ENSCL, EA 4478
Chimie Moléculaire et Formulation, F-59655 Villeneuve d’Ascq Cedex, France
| | - Jean-Marie Aubry
- Université Lille 1 and ENSCL, EA 4478
Chimie Moléculaire et Formulation, F-59655 Villeneuve d’Ascq Cedex, France
| | - Pierre Bauduin
- Institut de Chimie
Séparative de Marcoule, UMR 5257
(CEA/CNRS/UM2/ENSCM) BP 17171, 30207 Bagnols sur Cèze Cedex, France
| | - Véronique Nardello-Rataj
- Université Lille 1 and ENSCL, EA 4478
Chimie Moléculaire et Formulation, F-59655 Villeneuve d’Ascq Cedex, France
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Brusselle D, Bauduin P, Girard L, Zaulet A, Viñas C, Teixidor F, Ly I, Diat O. Rücktitelbild: Lyotropic Lamellar Phase Formed from Monolayered θ-Shaped Carborane-Cage Amphiphiles (Angew. Chem. 46/2013). Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brusselle D, Bauduin P, Girard L, Zaulet A, Viñas C, Teixidor F, Ly I, Diat O. Back Cover: Lyotropic Lamellar Phase Formed from Monolayered θ-Shaped Carborane-Cage Amphiphiles (Angew. Chem. Int. Ed. 46/2013). Angew Chem Int Ed Engl 2013. [DOI: 10.1002/anie.201308830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brusselle D, Bauduin P, Girard L, Zaulet A, Viñas C, Teixidor F, Ly I, Diat O. Lyotropic Lamellar Phase Formed from Monolayered θ-Shaped Carborane-Cage Amphiphiles. Angew Chem Int Ed Engl 2013; 52:12114-8. [DOI: 10.1002/anie.201307357] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Indexed: 11/11/2022]
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