3b01 トリフェニレンにエステル基が直結したディスコティック液晶の特異な集合体形成(ソフトマター,口頭発表,2012年日本液晶学会討論会)

概要

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Triphenylene has been widely used for a mesogenic core for discotic liquid crystalline (LC) materials. However, its LC derivatives, possessing side chain (R) via a -C(O)OR- type ester linkage, have not been studied so far. Recently, we investigated on the assembling behaviors of a series of LC TP(CO_2C_nH_<2n+1>)_6 and demonstrated that a dipole-dipole interaction among their ester carbonyl groups enables an exceptionally wide-range 2D lattice correlation in hexagonal columnar LCs. Being encouraged by this finding, we newly designed TP(CO_2R)_6 with semifluoroalkyl terminal chains. Since fluoroalkyl chains are known to aggregate strongly, we expected that such an interaction among fluoroalkyl side chains, in addition to the dipole-dipole interaction, could lead to further enhancement of 2D lattice correlation. Here, as an extension of our previous work, we also investigated the phase behavior of a TP(CO_2R)_6 derivative carrying imidazolium ion-appended paraffinic side chains.
日本液晶学会の論文
2012-08-20