Proton conductivity control by ion substitution in a highly proton-conductive metal - Organic framework

Masaaki Sadakiyo, Teppei Yamada, Hiroshi Kitagawa

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Proton conductivity through two-dimensional (2-D) hydrogen-bonding networks within a layered metal - organic framework (MOF) (NH4)2 (H2adp)-[Zn2(ox)3]·3H2O (H2adp = adipic acid; ox = oxalate) has been successfully controlled by cation substitution. We synthesized a cation-substituted MOF, K2 (H2adp)-[Zn2(ox)3]·3H2O, where the ammonium ions in a well-defined hydrogen-bonding network are substituted with non-hydrogen-bonding potassium ions, without any apparent change in the crystal structure. We successfully controlled the proton conductivity by cleavage of the hydrogen bonds in a proton-conducting pathway, showing that the 2-D hydrogen-bonding networks in the MOF truly contribute to the high proton conductivity. This is the first example of the control of proton conductivity by ion substitution in a well-defined hydrogen-bonding network within a MOF.

Original languageEnglish
Pages (from-to)13166-13169
Number of pages4
JournalJournal of the American Chemical Society
Issue number38
Publication statusPublished - Sep 24 2014


All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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