Syntheses,Crystal Structures and Luminescent Properties of Two Isostructural Fluorinated Metal–organic Frameworks Based on Mixed 2,3,5,6-tetrafluoro-1,4-bis(imidazole-1-yl-methyl)Benzene and Oxalate Ligands

Two isostructural fluorinated metal-organic frameworks [M(Fbix)(ox)]_n (where M = Zn or Mn, Fbix = 2,3,5,6-tetrafluoro-1,4-bis(imidazole-1-yl-methyl)benzene, ox = oxalate) have been synthesised from Fbix and oxamide under hydrothermal conditions, where oxalate is generated by the in situ hydrolysation of oxamide. The complexes are isostructural and display similar two-dimensional undulating sql nets formed by pillaring the one-dimensional [M(ox)]_n chains through Fbix linkers. Their solid-state fluorescence spectra indicate a ligand-based emission for both complexes.