A multifunctional cobalt-organic framework for proton conduction and selective sensing of Fe ions.

Developing multifunctional metal-organic frameworks (MOFs) is a new research trend. MOFs have shown remarkable performances in both proton conduction and fluorescence sensing, but the MOFs integrating the two performances are scarce. Herein, a Co-MOF, [Co(oba)(Hatz)(atz)(HO)(μ-OH)(μ-OH)]·HO (1, Hoba = 4,4-oxybis(benzoic acid), Hatz = 5-amino-1 tetrazole), has been assembled by Co ions with Hoba and Hatz ligands, providing a unique example of multifunctional MOFs with both proton conduction and fluorescence sensing performances.