Time-resolved circularly polarized luminescence of Eu -based systems.

Chiral Eu -based systems are frequently studied via circularly polarized luminescence spectroscopy. The emission lifetimes of each circular polarization, however, are virtually always ignored, because in a homogeneous sample of emitters, there should be no difference between the two. However, we show that in less robust Eu complex structures, as in the chiral complex Eu (facam) , a difference in the lifetimes of the two circularly polarized emission components arises due to heterogeneity of the complexes.