Novel high proton conductive material from liquid crystalline 4-(octadecyloxy)phenylsulfonic acid

Cheuk Fai Stephen CHOW, V. A. L. ROY, Zhou YE, Michael H. W. LAM, C. S. LEE, K. C. LAU

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20 Citations (Scopus)

Abstract

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. Copyright © 2010 The Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)6245-6249
JournalJournal of Materials Chemistry
Volume20
Issue number30
DOIs
Publication statusPublished - Aug 2010

Citation

Chow, C.-F., Roy, V. A. L., Ye, Z., Lam, M. H. W., Lee, C. S., & Lau, K. C. (2010). Novel high proton conductive material from liquid crystalline 4-(octadecyloxy)phenylsulfonic acid. Journal of Materials Chemistry, 20(30), 6245-6249. doi: 10.1039/C0JM00523A

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