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Probing Columnar Discotic Liquid Crystals by EPR Spectroscopy with a Rigid‐Core Nitroxide Spin Probe
Author(s) -
Gopee Hemant,
Cammidge Andrew N.,
Oganesyan Vasily S.
Publication year - 2013
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201303194
Subject(s) - discotic liquid crystal , electron paramagnetic resonance , columnar phase , triphenylene , chemical physics , liquid crystal , spectroscopy , nitroxide mediated radical polymerization , materials science , crystallography , chemistry , nuclear magnetic resonance , organic chemistry , mesophase , optoelectronics , polymer , physics , radical polymerization , quantum mechanics , copolymer
Discotics studied by EPR : The application of EPR spectroscopy to columnar discotic liquid crystals using a novel rigid‐core nitroxide spin probe (see picture) is possible. EPR spectra measured at different temperatures across three phases of hexakis( n ‐hexyloxy)triphenylene show a strong sensitivity to the phase composition, molecular rotational dynamics, and columnar order.