Two luminescent lanthanide-organic frameworks containing bithiophene groups for the selective detection of nitrobenzene and Fe

Two lanthanide-organic frameworks formulated as [Eu 2 (DMTDC) 3 (DEF) 4 ]·DEF·6H 2 O ( 1 ) and [Tb 2 (DMTDC) 3 (DEF) 4 ]·DEF·6H 2 O ( 2 ) (H 2 DMTDC = 3,4-dimethylthieno[2,3- b ]thiophene-2,5-dicarboxylic acid and DEF = N , N -diethylformamide) have been synthesized under solvothermal conditions by using a bithiophene dicarboxylate organic ligand, H 2 DMTDC. Compounds 1 and 2 are isomorphous and feature 3D frameworks with uninodal six-connected pcu α-Po topology structures. The systematic luminescence experiments reveal that 1 and 2 can be used as fast-response fluorescence sensors for the sensitive detection of nitrobenzene and Fe 3+ ions with favorable recyclability through fluorescence quenching. Two isostructural lanthanide-organic frameworks containing bithiophene groups can be used as fast-response fluorescent probes for the sensitive detection of nitrobenzene and Fe 3+ ions through fluorescence quenching.