Eu(III)-organic framework as a multi-responsive photoluminescence sensor for efficient detection of 1-naphthol, Fe3+ and MnO4− in water.

• A new metal–organic framework (Eu-MOF- 1) based on Eu(III) and carboxylate linker was synthesized. • Eu-MOF- 1 exhibits an unusual 3D framework based on 1D metal-carboxylate chains. • Eu-MOF- 1 was used as multi-responsive fluorescence sensor for the detection of biomarker 1-naphthol. • Eu-MOF- 1 as a sensor shows high selectivity, sensitivity and remarkable recyclability. A new three-dimensional Eu(III) metal–organic framework Eu(III)-MOF- 1 formulated as [Eu 3 (BDC) 4.5 (H 2 O)(DMF) 2 (H 2 BDC = 1,4-benzenedicarboxylic acid), has been successfully synthesized by solvothermal methods and characterized by structural analyses and luminescence studies. Crystallographic studies reveal that the Eu-MOF- 1 exhibits an unusual 3D framework based on 1D metal-carboxylate chains. Significantly, the luminescence explorations demonstrate that the Eu-MOF- 1 is the first multi-responsive fluorescence sensor for sensing biomarker 1-naphthol (1-N) of carbaryl exposure, Fe3+ ions and MnO 4 − ions with high sensitivity, selectivity and excellent recyclability through luminescence quenching. Moreover, the possible mechanisms of selective detection have been investigated in detail. This material could be a promising luminescent sensor for practical applications. [ABSTRACT FROM AUTHOR]