Integration of a (-Cu-S-)_n plane in a metal-organic framework affords high electrical conductivity.

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 {[Cu₂(6-Hmna)(6-mn)]·NH₄}_n (1, 6-Hmna?=?6-mercaptonicotinic acid, 6-mn?=?6-mercaptonicotinate), consisting of a two dimensional (-Cu-S-)_n plane, is synthesized from the reaction of Cu(NO₃)₂, 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^-1) 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.

SUBMITTER: Pathak A 

PROVIDER: S-EPMC6461620 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature