Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals

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 <i>N<...

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Autores principales:	Melina S. Weber, Margit Schulze, Giuseppe Lazzara, Antonio Palumbo Piccionello, Andrea Pace, Ivana Pibiri
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ionic liquids liquid crystals fluorinated salts heterocyclic mesogens Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/91832627f5564b988935720d342cd96a
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spelling	oai:doaj.org-article:91832627f5564b988935720d342cd96a2021-11-11T15:23:29ZOxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals10.3390/app1121103472076-3417https://doaj.org/article/91832627f5564b988935720d342cd96a2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10347https://doaj.org/toc/2076-3417The 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 <i>N</i>-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.Melina S. WeberMargit SchulzeGiuseppe LazzaraAntonio Palumbo PiccionelloAndrea PaceIvana PibiriMDPI AGarticleionic liquidsliquid crystalsfluorinated saltsheterocyclicmesogensTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10347, p 10347 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ionic liquids liquid crystals fluorinated salts heterocyclic mesogens Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	ionic liquids liquid crystals fluorinated salts heterocyclic mesogens Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Melina S. Weber Margit Schulze Giuseppe Lazzara Antonio Palumbo Piccionello Andrea Pace Ivana Pibiri Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
description	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 <i>N</i>-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.
format	article
author	Melina S. Weber Margit Schulze Giuseppe Lazzara Antonio Palumbo Piccionello Andrea Pace Ivana Pibiri
author_facet	Melina S. Weber Margit Schulze Giuseppe Lazzara Antonio Palumbo Piccionello Andrea Pace Ivana Pibiri
author_sort	Melina S. Weber
title	Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
title_short	Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
title_full	Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
title_fullStr	Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
title_full_unstemmed	Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals
title_sort	oxadiazolyl-pyridinium as cationic scaffold for fluorinated ionic liquid crystals
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/91832627f5564b988935720d342cd96a
work_keys_str_mv	AT melinasweber oxadiazolylpyridiniumascationicscaffoldforfluorinatedionicliquidcrystals AT margitschulze oxadiazolylpyridiniumascationicscaffoldforfluorinatedionicliquidcrystals AT giuseppelazzara oxadiazolylpyridiniumascationicscaffoldforfluorinatedionicliquidcrystals AT antoniopalumbopiccionello oxadiazolylpyridiniumascationicscaffoldforfluorinatedionicliquidcrystals AT andreapace oxadiazolylpyridiniumascationicscaffoldforfluorinatedionicliquidcrystals AT ivanapibiri oxadiazolylpyridiniumascationicscaffoldforfluorinatedionicliquidcrystals
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Oxadiazolyl-Pyridinium as Cationic Scaffold for Fluorinated Ionic Liquid Crystals

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