Proton-conductive metal-organic frameworks

Teppei Yamada, Masaaki Sadakiyo, Akihito Shigematsu, Hiroshi Kitagawa

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

Proton-conductive electrolytes are key materials in fuel cells. We introduced acidic functional groups into a porous coordination polymer (PCP), or metalorganic framework (MOF), and constructed proton-conductive PCP/MOFs. To achieve this, a novel synthetic method for introducing acidic groups in PCP/MOF was invented. The proton conductivities of various PCP/MOF materials were investigated by AC impedance spectroscopy, and some of the materials showed high proton conductivity up to 8 × 10-3 S cm-1 at ambient temperature. We also investigated the dependency of proton conductivity on functional groups and found a relationship between proton conductivity, the acidity of the functional groups, and the hydrogen-bond networks formed inside the pores of PCP/MOFs. These PCP/MOF materials have high crystallinity, and the frameworks and arrangement of guests in the inner pore were clearly determined by X-ray crystallographic analysis. The relationship between proton conductivity and hydrogen-bond networks was investigated. This study thus establishes a novel field for investigating highly proton-conductive materials.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalBulletin of the Chemical Society of Japan
Volume89
Issue number1
DOIs
Publication statusPublished - Jan 1 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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