Integration of a (-Cu-S-)<sub>n</sub> plane in a metal-organic framework affords high electrical conductivity.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30979944.
- Also identified by DOI 10.1038/s41467-019-09682-0 and PMC identifier 6461620.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Designing highly conducting metal-organic frameworks (MOFs) is currently a subject of great interest for their potential applications in diverse areas encompassing energy storage and generation. Herein, a strategic design in which a metal-sulfur plane is integrated within a MOF to achieve high electrical conductivity, is successfully demonstrated. The MOF {[Cu<sub>2</sub>(6-Hmna)(6-mn)]·NH<sub>4</sub>}<sub>n</sub> (1, 6-Hmna = 6-mercaptonicotinic acid, 6-mn = 6-mercaptonicotinate), consisting of a two dimensional (-Cu-S-)<sub>n</sub> plane, is synthesized from the reaction of Cu(NO<sub>3</sub>)<sub>2</sub>, and 6,6'-dithiodinicotinic acid via the in situ cleavage of an S-S bond under hydrothermal conditions. A single crystal of the MOF is found to have a low activation energy (6 meV), small bandgap (1.34 eV) and a highest electrical conductivity (10.96 S cm<sup>-1</sup>) among MOFs for single crystal measurements. This approach provides an ideal roadmap for producing highly conductive MOFs with great potential for applications in batteries, thermoelectric, supercapacitors and related areas.