Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
CREST, JST , 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan.
J Am Chem Soc. 2015 Oct 21;137(41):13212-5. doi: 10.1021/jacs.5b09076. Epub 2015 Oct 7.
We demonstrate switching of ionic conductivities in wedge-shaped liquid-crystalline (LC) ammonium salts. A thermoreversible phase transition between the rectangular columnar (Colr) and hexagonal columnar (Colh) phases is used for the switch. The ionic conductivities in the Colh phase are about four orders of magnitude higher than those in the Colr phase. The switching behavior of conductivity can be ascribed to the structural change of assembled ionic channels. X-ray experiments reveal a highly ordered packing of the ions in the Colr phase, which prevents the ion transport.
我们展示了楔形液晶（LC）季铵盐中离子电导率的切换。使用矩形柱状（Colr）和六方柱状（Colh）相之间的热可逆相变为开关。Colh 相中的离子电导率比 Colr 相中的离子电导率高约四个数量级。电导率的切换行为可以归因于组装离子通道的结构变化。X 射线实验揭示了 Colr 相中离子的高度有序堆积，这阻止了离子的传输。
