A dual-sensitized luminescent europium(iii) complex as a photoluminescent probe for selectively detecting Fe3+

A new luminescent Eu(III)complex, namely [Eu-2(BTFA)(4)(OMe)(2)(dpq)(2)] (1), in which BTFA = 3-benzoyl-1,1,1-trifluoroacetone and dpq = dipyrido [3,2-d:2 ',3 '-f] quinoxaline, has been designed and synthesized by employing two different ligands as sensitizers. Crystal structure analysis reveals that complex1is composed of dinuclear Eu(III)units crystallized in the monoclinicP1 & x304; space group. Notably,1exhibits high thermal stability up to 270 degrees C and excellent water stability. The photoluminescence property of the complex is investigated. Further studies show1can recognize Fe(3+)ions with high selectivity from mixed metal ions in aqueous solution through the luminescence quenching phenomenon. Furthermore, the recyclability and stability of1after sensing experiments are observed to be adequate. By virtue of the superior stability, detection efficiency, applicability and reusability, the as-prepared Eu(III)complex can be a promising fluorescent material for practical sensing.