A semiconducting metal-chalcogenide-organic framework with square-planar tetra-coordinated sulfur

We demonstrated here a novel semiconducting metal-chalcogenide-organic framework (MCOF-89) with an optical bandgap through the unlikely assembly between a metal chalcogenide unit and carboxylic acid. The elusive metal-chalcogenide unit [Mn-4(mu(4)-S)] with square-planar tetra-coordinated sulfur (sptS) is for the first time observed in MOFs.