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Supramolecular ionic networks with superior thermal and transport properties based on novel delocalized di-anionic compounds
journal contribution
posted on 2015-01-01, 00:00 authored by M A Aboudzadeh, A S Shaplov, G Hernandez, P S Vlasov, E I Lozinskaya, Cristina Pozo-GonzaloCristina Pozo-Gonzalo, Maria ForsythMaria Forsyth, Y S Vygodskii, D MecerreyesSupramolecular ionic networks based on highly delocalized dianions having (trifluoromethane-sulfonyl)imide, (propylsulfonyl)methanide and (cyano-propylsulfonyl)imide groups were developed and their physical properties were examined in detail. Most of the synthesized compounds were semi-crystalline possessing Tm values close to 100°C; however, amorphous networks were also obtained using aromatic asymmetric dianions. Rheological measurements in temperature sweep tests at a constant frequency confirmed two different behaviors: a fast melting close to the Tm for semi-crystalline materials and a thermoreversible network for liquid transition for the amorphous supramolecular ionic networks. It was found that the amorphous ionic networks showed significantly higher ionic conductivity (10-3 S cm-1 at 100°C) than the crystalline ionic networks (10-6 S cm-1) and previously reported amorphous citrate ionic networks (10-5 S cm-1). The supramolecular ionic networks containing hydrophobic (trifluoromethanesulfonyl)imide groups demonstrated improved water stability and higher thermal stability than the previously synthesized carboxylate ones. Noticeably, the obtained amorphous supramolecular ionic networks combine not only high ionic conductivity and thermal stability, but also self-healing properties into the same material.
History
Journal
Journal of materials chemistry aVolume
3Issue
5Pagination
2338 - 2343Publisher
The Royal Society of ChemistryLocation
Cambridge, Eng.Publisher DOI
ISSN
2050-7488eISSN
2050-7496Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2015, The Royal Society of ChemistryUsage metrics
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