A bimodal anionic MOF: turn-off sensing of CuII and specific sensitization of EuIII

A novel porous anionic MOF {[Mg-3(ndc)(2.5)(HCO2)(2)(H2O)][NH2Me2]center dot 2H(2)O center dot DMF} (1) having exchangeable dimethyl amine cations in 1D channels has been synthesized and characterized. Through cation exchange, 1 manifests bimodal functionality, being a turn-off sensor of Cu-II on one hand, and a selective sensitizer of Eu-III emitting intense pure red emission on the other.