β-Cyclodextrin inclusion of europium(III) tris(β-diketonate)-bipyridine

The crystal structure of the compound Eu(NTA)3 · bipy · 0.44CHCl3 was determined by X-ray diffraction and compared with previously reported structures containing the adduct Eu(NTA)3 · bipy. Encapsulation of Eu(NTA)3 · bipy in β-cyclodextrin gave an inclusion compound which exhibited photoluminescence and excitation spectra different from those of the non-included complex, revealing, in particular, an enhancement of the Eu3+ sensitized process.