Luminescent and structural properties of a Eu(III) complex: Formation of a one-dimensional array bridged by 2,2′-bipyrimidine

The previously reported monometallic Eu(III) complex Eu(hfa)3bpm, where hfa = 1,1,1,5,5,5- hexafluoroacetylacetonate and bpm = 2,2′-bipyrimidine, shows characteristic emissions in the visible region associated with the 5D0 → 7FJ (J = 0–4) transitions of the Eu(III) center. Lifetime measurements are fit to a mono-exponential and are inversely related to temperature. Crystals grown from slow diffusion of hexanes into an ethyl acetate solution of the complex yield an unusual one-dimensional array in which each Eu(III) complex is connected to another through bpm bridging units.