Structure and photophysics of a europium dimeric system, Eu2(HFAA)2(Dipy)2(TFOAc)2(OAc)2, in the solid state and solution

A new example of dimeric complex of europium β-diketones with α,α′ dipyridine-Lewis base ligand, trifluoroacetate and acetates of formula C76H48Eu4F36N8O24 was obtained. The high resolution emission and emission excitation spectra at 293 and 4 K, as well as luminescence decay time measurements were used to characterize the title compound in the solid state and in the solution. The Raman spectra were used to analyze the vibronic coupling. The influence of dimeric structure on the optical behaviour will be presented.