Synthesis, structure and spectroscopic properties of rare earth complexes with a new aryl amide 2,2′-bipydine derivative

Solid complexes of rare earth nitrates and picrates with a new aryl amide ligand 3.3′-bis(benzylamido)-2,2′-bipyridine (L) were synthesized and characterized by elemental analysis, IR and molar conductivity measurements. The molecular structures of the complex [TbL2(NO3)3H2O]·2H2O have been determined by single-crystal X-ray diffraction. The fluorescent properties of the Eu(III) and Tb(III) nitrates and picrates complexes in solid state were also investigated in detail. Under the excitation, these complexes exhibited characteristic emissions of europium and terbium ions. It is worth noting that the nature of the anion has a great effect upon the composition of the complexes as well as emission properties of them.