Relaxation and luminescence studies on hydrated bipyridyl- and terpyridyl-based lanthanide complexes.

The synthesis of the novel ligand L2, based on a 2,2'-bipyridine functionalized by a carboxylate function and a methyleneiminodiacetate group in positions 6 and 6', is described. Its europium complex, [EuL2(H(2)O)(3)], has been prepared and characterized. The spectroscopic properties of [EuL2(H(2)O)(3)] were studied by means of absorption, and both steady-state and time-resolved luminescence spectroscopy.