Issue 12, 2007
From the journal:

Journal of Materials Chemistry

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

Fabrizio Lo Celso,*a   Ivana Pibiri,b   Alessandro Triolo,c   Roberto Triolo,a   Andrea Pace,*b   Silvestre Buscemib  and  Nicolò Vivonab  

* Corresponding authors

a Dipartimento di Chimica Fisica “F. Accascina”, Università degli Studi di Palermo, Viale delle Scienze, Parco d'Orleans II, I-90128 Palermo, Italy
E-mail: locelso@unipa.it
Fax: +39 091 590015
Tel: +39 091 6459847

b Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze, Parco d'Orleans II, I-90128 Palermo, Italy
E-mail: pace@unipa.it
Fax: +39 091 596825
Tel: +39 091 596903

c Istituto Processi Chimico-Fisici, Sezione di Messina, C.N.R., Via La Farina 237, 98123 Messina, Italy
E-mail: triolo@its.me.cnr.it
Fax: +39 090 2939902
Tel: +39 090 2939693

Abstract

A new series of fluorinated salts, iodides and trifluoromethanesulfonates, was synthesized from perfluoroalkylated 1,2,4-oxadiazolylpyridines. Their thermotropic properties were investigated by combined temperature resolved small angle and wide angle X-ray scattering, differential scanning calorimetry and polarised optical microscopy. The UV–visible and photoluminescence properties were studied for all compounds. The results showed for two compounds the existence of an enantiotropic mesomorphic smectic liquid crystal phase. All iodides showed thermochromism phenomena suggesting prospective applications in optoelectronics.

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

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Article information

DOI
https://doi.org/10.1039/B615190F
Article type
Paper
Submitted
18 Oct 2006
Accepted
05 Dec 2006
First published
05 Jan 2007

J. Mater. Chem., 2007,17, 1201-1208

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

F. Lo Celso, I. Pibiri, A. Triolo, R. Triolo, A. Pace, S. Buscemi and N. Vivona, J. Mater. Chem., 2007, 17, 1201 DOI: 10.1039/B615190F

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