An unprecedented binodal (4,6)-connected Co(II) MOF as dual-responsive luminescent sensor for detection of acetylacetone and Hg2+ ions

A new Co(II) organic framework, {[Co-2(L)(hfpd)(H2O)]center dot 1.75H(2)O}(n) (1) (H(4)hfpd = 4,4'-(hexafluoroisopropylidene)diphthalic acid, L = 4,4'-bis(imidazol-1-yl)-biphenyl) was hydrothermally synthesized and characterized. 1 possesses an unusual (4,6)-connected layered network architecture. Fluorescence titration results present that 1 is rarely dual-responsive probe to detect acetylacetone and Hg2+ ions by luminescence quenching.