Paramagnetic ionic liquid crystals: Ion conductive bent-core derivatives of stable radicals
作者:Sylwia Ciastek-Iskrzycka、Jacek Szczytko、Hirosato Monobe、Damian Pociecha、Marcin Jasiński、Piotr Kaszyński
DOI:10.1016/j.molliq.2021.116028
日期:2021.9
A series of bent-core paramagnetic ionic liquid crystals derived from stable radicals, 6-oxoverdazyl and 1,4-dihydrobenzo[e][1,2,4]triazin-4-yl, and containing the N-methylimidazolium group were prepared and their mesogenic, magnetic and ion conductive properties were investigated. The ion pairs form fluid smectic phases above 100 °C, in which ionic layers are separated by paramagnetic layers. Ion
制备了一系列衍生自稳定自由基、6-氧代过哒嗪和 1,4-二氢苯并[ e ][1,2,4]三嗪-4-基并含有N-甲基咪唑鎓基团的弯曲核顺磁离子液晶,并研究了它们的介晶、磁性和离子导电性能。离子对在 100 °C 以上形成流体近晶相,其中离子层被顺磁层隔开。两种选定衍生物的离子电导率在 10 -5 –10 -8 S cm -1和活化能E a 的范围内约为 1.5 eV。原始固体样品的磁化率测量 (SQUID) 揭示了顺磁性层中类似液体的分子排列和弱反铁磁相互作用。