Synthesis and thermotropic properties of new green electrochromic ionic liquid crystals

2019 ◽  
Vol 43 (46) ◽  
pp. 18285-18293 ◽  
Author(s):  
Lucia Veltri ◽  
Gabriella Cavallo ◽  
Amerigo Beneduci ◽  
Pierangelo Metrangolo ◽  
Giuseppina Anna Corrente ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Small Molecules ◽  
Ionic Liquid Crystals ◽  
Thermotropic Properties

New liquid crystal viologens, which exhibit green electrochromic behavior in the LC phase, rarely observed for small molecules, have been developed.

Surface-Functionalized Ionic Liquid Crystal-Supported Ionic Liquid Phase Materials: Ionic Liquid Crystals in Mesopores

ChemPhysChem ◽  
2011 ◽  
Vol 12 (18) ◽  
pp. 3539-3546 ◽  
Author(s):  
Florian T. U. Kohler ◽  
Bruno Morain ◽  
Alexander Weiß ◽  
Mathias Laurin ◽  
Jörg Libuda ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Phase ◽  
Functionalized Ionic Liquid ◽  
Supported Ionic Liquid ◽  
Ionic Liquid Crystals

Study on the thermotropic properties of highly fluorinated 1,2,4-oxadiazolylpyridinium salts and their perspective applications as ionic liquid crystals

2007 ◽  
Vol 17 (12) ◽  
pp. 1201 ◽  
Author(s):  
Fabrizio Lo Celso ◽  
Ivana Pibiri ◽  
Alessandro Triolo ◽  
Roberto Triolo ◽  
Andrea Pace ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Ionic Liquid Crystals ◽  
Thermotropic Properties

scholarly journals Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals

2021 ◽  
Vol 11 (21) ◽  
pp. 10347
Author(s):  
Melina S. Weber ◽  
Margit Schulze ◽  
Giuseppe Lazzara ◽  
Antonio Palumbo Piccionello ◽  
Andrea Pace ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Alkyl Chain ◽  
Scanning Calorimetry ◽  
New Class ◽  
Structural Variables ◽  
Ionic Liquid Crystals ◽  
Thermotropic Properties

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.

scholarly journals Fatty Acid-Derived Ionic Liquid Lubricant. Protic Ionic Liquid Crystals as Protic Ionic Liquid Additives

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 710 ◽  
Author(s):  
María-Dolores Avilés ◽  
Ramón Pamies ◽  
José Sanes ◽  
Francisco-José Carrión ◽  
María-Dolores Bermúdez
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Crystal ◽  
Fatty Acid ◽  
Liquid Crystals ◽  
Water Evaporation ◽  
Protic Ionic Liquid ◽  
X Ray ◽  
Sliding Surfaces ◽  
Ionic Liquid Crystals

Fatty acids are natural products which have been studied as green lubricants. Ionic liquids are considered efficient friction reducing and wear preventing lubricants and lubricant additives. Fatty acid-derived ionic liquids have shown potential as neat lubricant and additives. Protic ionic liquid crystals (PILCs) are protic ionic liquids (PILs) where cations and anions form ordered mesophases that show liquid crystalline behavior. The adsorption of carboxylate units on sliding surfaces can enhance the lubricant performance. Ionic liquid crystal lubricants with longer alkyl chains can separate sliding surfaces more efficiently. However, they are usually solid at room temperature and, when used as additives in water, transitions to high friction coefficients and wear rates, with tribocorrosion processes occur when water evaporation takes place at the interface. In order to avoid these inconveniences, in the present work, a protic ammonium palmitate (DPA) ionic liquid crystal has been added in 1 wt.% proportion to a short chain citrate ionic liquid (DCi) with the same protic ammonium cation. A spin coated layer of (DCi + DPA) was deposited on AISI316L steel surface before the sliding test against sapphire ball. Synergy between DCi PIL and DPA PILC additive reduces friction coefficient and wear rate, without tribocorrosion processes, as shown by scanning electron microscopy (SEM)/energy dispersive X-ray microanalysis (EDX) and X-ray photoelectron spectroscopy (XPS) results.

Synthesis, characterization, and tuning of the liquid crystal properties of ionic materials based on the cyclic polyoxothiometalate [{Mo4O4S4(H2O)3(OH)2}2(P8W48O184)]36−

Soft Matter ◽  
2015 ◽  
Vol 11 (6) ◽  
pp. 1087-1099 ◽  
Author(s):  
Nancy Watfa ◽  
Sébastien Floquet ◽  
Emmanuel Terazzi ◽  
Mohamed Haouas ◽  
William Salomon ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Organic Cations ◽  
Crystal Properties ◽  
Ionic Materials ◽  
Ionic Liquid Crystals

Ionic associations between a polyoxometalate cluster and organic cations leads to the formation of ionic liquid crystals.

Mesophase transition induced by oscillatory shear in imidazolium-based ionic liquid crystals on molecular-dynamics simulations

2021 ◽  
Author(s):  
Min Liu ◽  
Hayato Shiba ◽  
Huashan Liu ◽  
Hailong Peng
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquid ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Molecular Dynamics Simulations ◽  
Oscillatory Shear ◽  
Ionic Liquid Crystals ◽  
Dynamics Simulations

Molecular dynamics simulations were performed on a 1-dodecyl-3-methylimidazolium hexafluorophosphate ([C$_{12}$mim][PF$_6$]) ionic liquid crystal (ILC) with an oscillatory shear. We found the oscillatory shear can both accelerate and suppress the mesophase...

Inducting effects of ionic liquid crystal modified-PEDOT:PSS on the performance of bulk heterojunction polymer solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 52874-52881 ◽  
Author(s):  
Xiaofeng Wang ◽  
Siwei Hu ◽  
Qiujuan Li ◽  
Fan Li ◽  
Kao Yao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solar Cells ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Heterojunction Solar Cells ◽  
Anode Buffer Layer ◽  
Ionic Liquid Crystals

Photovoltaic performance was improved in P3HT/PCBM bulk-heterojunction solar cells induced by ionic liquid crystals modified PEDOT:PSS anode buffer layer.

scholarly journals Inside Cover: Surface-Functionalized Ionic Liquid Crystal-Supported Ionic Liquid Phase Materials: Ionic Liquid Crystals in Mesopores (ChemPhysChem 18/2011)

ChemPhysChem ◽  
2011 ◽  
Vol 12 (18) ◽  
pp. 3486-3486
Author(s):  
Florian T. U. Kohler ◽  
Bruno Morain ◽  
Alexander Weiß ◽  
Mathias Laurin ◽  
Jörg Libuda ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Liquid Phase ◽  
Functionalized Ionic Liquid ◽  
Supported Ionic Liquid ◽  
Ionic Liquid Crystals
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