Anion Specific Effects Drive the Formation of Li-Salt Based Aqueous Biphasic Systems
In: ISSN: 1520-6106, 2021
Online
academicJournal
Zugriff:
International audience ; Aqueous biphasic systems (ABSs) can form when mixing water with two compounds such as polymers, ionic liquids, or simple salts. While this phenomenon has been known for decades and found applications in various fields such as biology, recycling, or even more recently electrochemistry, the physics behind the formation of ABSs remains ill-understood. It was recently demonstrated that ABSs can be composed of two salts sharing the same cation (Li+) but different anions (sulfonamide and halide). Interestingly, their formation could not be explained by the position of the anions within the chaotropic/kosmotropic series and was rather proposed to originate from an anion size mismatch, albeit the size for these anions was never measured yet owing to the lack of a proper experimental methodology. Here, we combine experimental techniques and molecular simulations to assess the specific effects (size, shape, hydrophobic/hydrophilic character) of a series of anions and correlate them with the formation of ABSs. We demonstrate that while the anion size mismatch is a prerequisite for the formation of Li-salts based ABSs, their shape can also play an important role, providing general guidelines for forming new ABSs with potential future applications.
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Anion Specific Effects Drive the Formation of Li-Salt Based Aqueous Biphasic Systems
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Autor/in / Beteiligte Person: | Dubouis, Nicolas ; France-Lanord, Arthur ; Brige, Amandine ; Salanne, Mathieu ; Grimaud, Alexis ; Chimie du solide et de l'énergie (CSE) ; Collège de France (CdF (institution))-Institut de Chimie - CNRS Chimie (INC-CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ; Réseau sur le stockage électrochimique de l'énergie (RS2E) ; Université de Nantes (UN)-Aix Marseille Université (AMU)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Université de Picardie Jules Verne (UPJV)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Montpellier (UM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) ; Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA) ; PHysicochimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX) ; Institut de Chimie - CNRS Chimie (INC-CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ; Département de Chimie - ENS Paris ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) ; Institut universitaire de France (IUF) ; Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) ; ANR-19-CE05-0014,BALWISE,Batteries aqueuses au Li utilisant des électrolytes superconcentrés(2019) |
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Zeitschrift: | ISSN: 1520-6106, 2021 |
Veröffentlichung: | HAL CCSD ; American Chemical Society, 2021 |
Medientyp: | academicJournal |
DOI: | 10.1021/acs.jpcb.1c01750 |
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