| Abstract: As useful fluorescent reagent, rare earth complexes with β-diketones have been extensively studied. Four new rare earth (La, Eu) ternary complexes with β-diketones, (benzoylacetone (Hbza), 2-thenoyltrifluoroacetone, (HTTA)) and organic base (2-(2-pyridyl) benzimidazole, (Hpbi)) have been synthesized and characterized by elemental analysis, IR, NMR. The general formulae of these complexes are ［Ln(bza)3(Hpbi)］ and［Ln(TTA)3(Hpbi)］. The effects of coordinated base on UV, especially on fluorescent properties of the complexes were discussed. The results showed that the dehydro-Hpbi, pbi－, strongly enhances the fluorescence of the complexes. |
