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Synthesis, Characterization and Applications of Ionic Liquids and Ionic Liquid Crystals

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 2476

Special Issue Editors


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Guest Editor
Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
Interests: electrochromism; electrofluorochromism; liquid crystals; fluorescent materials; optoelectronic devices
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
Interests: chemistry of materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Over the past two decades Ionic liquids (ILs) and Ionic liquid crystals (ILCs) have had a wide impact on science and technology, representing cutting-edge materials for various applications. ILs, organic salts which melt below 100°C, find application as catalysts or solvents in organic chemistry, fluids in separation, extraction and purification techniques, electrolytes, storage media for toxic gases, etc. ILCs are also organic salts generally forming isotropic liquid phase above 100 °C. They combine some properties of ionic liquids (dynamics) with those of liquid crystals (order), and therefore are very promising in research fields such as electronic devices, direct synthesis approaches, ionic self-assembly and sensing. This special issue will cover both theoretical and experimental aspects focusing on synthesis and characterization of novel compounds, novel types of ionic mesophases, efficient protocols to lower their production costs, the relationship between molecular design and mesomorphic properties, applications in devices and so on.

You are invited to contribute to this Special Issue with high quality papers that may represent pivotal points in the aforementioned scientific and technological fields and that may open the way to future challenges and insights for both academic and industrial community.

Prof. Dr. Amerigo Beneduci
Dr. Giuseppina Anna Corrente
Guest Editors

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Keywords

  • ionic liquids
  • organic salts
  • green synthesis
  • ionic liquid crystals
  • ionic electrolytes
  • mesomorphism
  • charge mobility
  • spectroscopy
  • eletrochemistry
  • polarized optical microscope
  • X-ray diffraction

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Published Papers (1 paper)

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Research

12 pages, 2281 KiB  
Article
Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
by Melina S. Weber, Margit Schulze, Giuseppe Lazzara, Antonio Palumbo Piccionello, Andrea Pace and Ivana Pibiri
Appl. Sci. 2021, 11(21), 10347; https://doi.org/10.3390/app112110347 - 3 Nov 2021
Cited by 2 | Viewed by 1895
Abstract
The synthesis and characterization of a new class of 1,2,4-oxadiazolylpyridinium as a cationic scaffold for fluorinated ionic liquid crystals is herein described. A series of 12 fluorinated heterocyclic salts based on a 1,2,4-oxadiazole moiety, connected through its C(5) or C(3) to an N [...] Read more.
The synthesis and characterization of a new class of 1,2,4-oxadiazolylpyridinium as a cationic scaffold for fluorinated ionic liquid crystals is herein described. A series of 12 fluorinated heterocyclic salts based on a 1,2,4-oxadiazole moiety, connected through its C(5) or C(3) to an N-alkylpyridinium unit and a perfluoroheptyl chain, differing in the length of the alkyl chain and counterions, has been synthesized. As counterions iodide, bromide and bis(trifluoromethane)sulfonimide have been considered. The synthesis, structure, and liquid crystalline properties of these compounds are discussed on the basis of the tuned structural variables. The thermotropic properties of this series of salts have been investigated by differential scanning calorimetry and polarized optical microscopy. The results showed the existence of an enantiotropic mesomorphic smectic liquid crystalline phase for six bis(trifluoromethane)sulfonimide salts. Full article
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