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Polymerizable Ionic Liquid Crystals
Author(s) -
Jazkewitsch Olga,
Ritter Helmut
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200900187
Subject(s) - mesogen , ionic liquid , differential scanning calorimetry , biphenyl , materials science , liquid crystal , ionic bonding , polymerization , polymer chemistry , polymer , crystallography , organic chemistry , chemistry , liquid crystalline , catalysis , ion , composite material , physics , optoelectronics , thermodynamics
Polymerizable vinylimidazolium ionic liquids (ILs) that contain mesogenic coumarin and biphenyl units, respectively, have been synthesized. The N ‐alkylation of N ‐vinylimidazole with bromoalkylated mesogenic units 7‐(6‐bromohexyloxy)coumarin ( 1 ) and 4,4′‐bis(6‐bromohexyloxy)biphenyl ( 2 ) was then carried out. The thermal behavior of the obtained ILs 3 and 4 was investigated by differential scanning calorimetry and polarizing optical microscopy. These measurements showed that the attached mesogenic units induce the self‐assembly of ILs and, therefore, the occurrence of liquid crystalline phases. Subsequently, the ionic liquid crystals (ILCs) 3 and 4 were polymerized by a free‐radical mechanism.