Superprotonic conductivity of a uio-66 framework functionalized with sulfonic acid groups by facile postsynthetic oxidation

Won Ju Phang, Hyuna Jo, Woo Ram Lee, Jeong Hwa Song, Kicheon Yoo, Bongsoo Kim, Chang Seop Hong

Research output: Contribution to journalArticle

211 Citations (Scopus)

Abstract

Facile postsynthetic oxidation of the thiol-laced UiO-66-type framework UiO-66(SH)<inf>2</inf> enabled the generation of UiO-66(SO<inf>3</inf>H)<inf>2</inf> with sulfonic acid groups covalently linked to the backbone of the system. The oxidized material exhibited a superprotonic conductivity of 8.4×10<sup>-2</sup> S cm<sup>-1</sup> at 80 °C and 90 % relative humidity, and long-term stability of the conductivity was observed. This level of conductivity exceeds that of any proton-conducting MOF reported to date and is equivalent to the conductivity of the most effective known electrolyte, Nafion. Decorated for honorable conductivity: The postsynthetic oxidation of a thiol-laced UiO-66-type framework generated sulfonic acid groups covalently linked to the backbone of the system (see picture; green circles are Zrpound;O nodes). The oxidized material exhibited stable superprotonic conductivity of 8.4×10<sup>-2</sup> S cm<sup>-1</sup> at 80 °C and 90 % relative humidity.

Original languageEnglish
Pages (from-to)5142-5146
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number17
DOIs
Publication statusPublished - 2015 Apr 20

Keywords

  • metal-organic frameworks
  • postsynthetic oxidation
  • proton-conducting materials
  • sulfonic acid groups
  • thiol groups

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

Fingerprint Dive into the research topics of 'Superprotonic conductivity of a uio-66 framework functionalized with sulfonic acid groups by facile postsynthetic oxidation'. Together they form a unique fingerprint.

  • Cite this