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Photoswitching of the dielectric constant has been observed for the first time in the spin-crossover complex [Fe(L)(CN)2]·H2O (L=2,13-dimethyl-6,9-dioxa-3,12,18-triazabicyclo[12.3.1]octadeca-1(18),2,12,14,16-pentaene, see picture). The electrical detection of a photoinduced change in spin state could allow the use of such complexes in optical information-storage devices. |