SWITCHING THE LUMINESCENCE OF AN EUROPIUM ION ON AND OFF WITH LIGHT

摘要

Photochromic molecules react to light by changing physical properties such as their structure or absorption spectrum. Yu Liu and co-workers report a luminescent supramolecular complex where the luminescence can be switched on or off by alternating UV and visible light irradiation.The researchers combine a perfluorocyclopentene-based photochromic diarylethene derivative (DAE) with an europium complex linked to a dibenzo-24-crown-8.