Lighting up chemistry

Researchers from The Netherlands and Russia have examined how transition metal complexes can act as light-gathering antennas for the photoluminescence of europium and found they could make their system emit white light. The study reveals that a photoluminescent iridium complex can transfer a proportion of absorbed light energy to a photoluminescent europium complex and make it glow even if the radiation is below the threshold at which europium normally photoluminesces. The result is white emission as the iridium complex emits the blue-green component while the europium complex emits red light.