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 language | English |
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Pages (from-to) | 5142-5146 |
Number of pages | 5 |
Journal | Angewandte Chemie - International Edition |
Volume | 54 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2015 Apr 20 |
Keywords
- metal-organic frameworks
- postsynthetic oxidation
- proton-conducting materials
- sulfonic acid groups
- thiol groups
ASJC Scopus subject areas
- Chemistry(all)
- Catalysis