Five water-stable luminescent Cd^II-based metal–organic frameworks as sensors for highly sensitive and selective detection of acetylacetone, Fe³⁺ and Cr₂O₇²⁻ ions

Five CdII-based MOFs with different topologies were prepared, in which 2 and 3 are rare examples which display excellent sensitivity, selectivity, recyclability and structural stability for detection of acac/Fe3+ and acac/Cr2O72−, respectively.