Synthesis and fluorescence of novel conjugated europium complex

A novel organic ligand, 6-(ortho-methyl-anilino carbonyl) 2-pyridine carboxylic acid (H-o-MAP), and the corresponding europium complex, tris ( 6-(ortho-methyl-anilino carbonyl) 2-pyridine carboxylato) europium Eu-o-MAP) were designed and synthesized. The results show that solid Eu-o-MAP is a conjugated complex, emitting strong red fluorescence dominantly due to a ligand-sensitizd luminescence mechanism. The lifetimes of D-5(0) of Eu3+, in the complex were examined using time-resolved spectroscopic analysis, and the lifetime values were (1.50 +/- 0.01) ms for solid Eu(o-MAP)(3) and (1.10 +/- 0.01) ms for 1.0 x 10(-5) mol(.)L(-1) Eu(o-MAP)(3) ethanol solution, respectively. Themogravimetric analysis shows that the europium complex has good thermal stability.