Supramolecular liquid crystals of amide functionalized imidazolium saltsElectronic supplementary information (ESI) available: IR, proton and carbon NMR data for all compounds. See http://www.rsc.org/suppdata/jm/b2/b210562d/
- 4 March 2003
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 13 (5) , 1079-1084
- https://doi.org/10.1039/b210562d
Abstract
Liquid crystalline 1-acetamido-3-alkylimidazolium bromide, hexafluorophosphate and tetrafluoroborate salts with 3-alkyl chains of carbon number n = 10, 12, 14, 16 and 18 were prepared. The single crystal structure of the PF6 − salt of n = 12 self-organizes to form a framework of a hydrogen bonded ribbon polymer. The mesomorphic behaviors of these compounds were studied by polarized optical microscopy, differential scanning calorimetry and powder X-ray diffraction. The presence of extended hydrogen bonding interactions in these acetamidoimidazolium salts allows them to have a wide temperature range of the mesophase. Anions have a profound effect on the phase transition temperature, suggesting that both ionic and hydrogen bonding interactions play dominant roles in the mesomorphic behavior of these liquid crystalline compounds.Keywords
This publication has 0 references indexed in Scilit: