A family of isostructural lanthanide compounds was explored and enhanced luminescence accomplished by doping. A novel and multifunctional fluorescence probe was developed, which was able to detect CH3COOH, Al3+ and Cr2O72−.

A series of new isostructural lanthanideIJIII) complexes are reported which are constructed from Schiff base and β-diketonate ligands, namely, [Ln 2 (DBM) 6 (L)] (Ln = Sm (1), Eu (2), Gd (3), Dy (4), Yb (5); L = N,N′bis(pyridin-2-ylmethylene)ethane-1,2-diamine, DBM = dibenzoylmethanide). The structures of the isomorphous complexes 1-5 were determined by single-crystal X-ray crystallography. The two Ln(III) ions in the molecules of 1-5 are bridged by a Schiff base ligand that displays a curved configuration. Complexes 1, 2 and 5 exhibit lanthanide ion-based luminescence not only in the solid state but also in methanol solution. The lifetimes and quantum yields of luminescence were also determined. The magnetic analysis reveals that complexes 4 and 5 exhibit field-induced single-molecule magnet behavior with energy barriers (U eff / k B ) of 46.8 and 23.0 K at direct current fields of 2000 Oe, respectively.

Four type lanthanide(iii) complexes constructed from Schiff base and β-diketonate ligands have been synthesized by the same method. The structures were determined by single crystal X-ray crystallographic studies, and their luminescence properties were determined.

No abstract