Novel high proton conductive material from liquid crystalline 4-(octadecyloxy)phenylsulfonic acid
作者:Cheuk-Fai Chow、V. A. L. Roy、Zhou Ye、Michael H. W. Lam、C. S. Lee、K. C. Lau
DOI:10.1039/c0jm00523a
日期:——
Liquid crystal based sulfonic acid, 4-(octadecyloxy)phenylsulfonic acid, 1, effectively transports protons at 80 °C under non-humidified conditions. At its smectic A liquid crystal state, the proton conductivity of 1 was measured to be 1.1 × 10−2 S cm−1. The proton conductivities of 1 at its molten and solid powder states were found to be 1.2 × 10−4 and 1.5 × 10−7 S cm−1, respectively. A lamellar structure of bilayer stacks of 1 with the sulfonic acid groups in a head-to-head configuration was found within the monodomain of SmA phase of 1 from in situ XRD and DFT calculation. We proposed that the efficient proton transporting property of 1 is highly correlated to the formation of supramolecular pathways between the molecules at its liquid crystal phase.
基于液晶的磺酸--4-(十八烷氧基)苯磺酸 1 在 80 °C 的非湿润条件下有效地传输质子。经测量,1 的质子电导率在其 A 型液晶状态下为 1.1 × 10-2 S cm-1。1 在熔融和固体粉末状态下的质子电导率分别为 1.2 × 10-4 和 1.5 × 10-7 S cm-1。通过原位 XRD 和 DFT 计算发现,在 1 的 SmA 相单域内,磺酸基团呈头对头构型,形成了 1 的双层叠层结构。我们提出,1 的高效质子传输特性与其液晶相中分子间超分子通路的形成高度相关。