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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Proton-conducting ionic liquids based upon multivalent anions and alkylimidazolium cations
Wataru Ogihara1, Hiroyuki Kosukegawa, Hiroyuki Ohno
1Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
New alkylimidazolium ionic liquids were synthesized using acidic anions from multivalent sources. These novel materials are expected to exhibit superior thermal stability and ionic conductivity, particularly for proton conduction applications.
Area of Science:
- Materials Science
- Electrochemistry
Background:
- Ionic liquids (ILs) are salts with low melting points, offering unique properties for various applications.
- Alkylimidazolium cations are common components in ILs, influencing their physicochemical characteristics.
- Acidic anions can impart specific functionalities, such as proton conductivity.
Purpose of the Study:
- To synthesize novel alkylimidazolium ionic liquids incorporating acidic anions derived from multivalent sources.
- To investigate the potential of these new ionic liquids for enhanced thermal properties and ionic conductivity.
- To explore their suitability for proton conduction applications.
Main Methods:
- Synthesis of alkylimidazolium ionic liquids with specific acidic anions.
- Characterization of thermal properties (e.g., thermal stability).
- Evaluation of ionic conductivity, including proton conductivity measurements.
Main Results:
- Successful preparation of alkylimidazolium ionic liquids with acidic anions.
- Demonstration of excellent thermal properties in the synthesized ILs.
- Observation of significant ionic conductivity, with potential for proton conduction.
Conclusions:
- The developed alkylimidazolium ionic liquids possess promising thermal stability.
- These ILs exhibit high ionic conductivity, suitable for electrochemical applications.
- The acidic anion incorporation facilitates effective proton conduction.
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Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Ionic Bonding and Electron Transfer
