Photochromic compounds are of growing interest and, especially, the possibility of switching fluorescence properties with photochromic molecules has great potential for various technological applications, including the design of molecular-based optical memories. In this work, we introduce a new switching concept on the basis of a dyad (Fig.1) consisting of a perylene bisimide (PBI) fluorescent dye and a diarylethene (DAE) derivative. The present photochromic system allows non-destructive read-out, as a result of the fluorescence switching achieved by intramolecular photoinduced electron transfer (PET) from the excited PBI to the closed form of DAE moiety. In contrast with many previously reported optical memory systems, Förster resonance energy transfer (FRET) is ruled out, thus avoiding destructive read-out due to photochromic cycloreversion.
Towards Fluorescent Memories with Non-destructive Read-out: Photoswitching of Fluorescence by Intramolecular Electron Transfer in a Diarylethene-Perylene Bisimide Photochromic System
ORLANDI, Michele;SCANDOLA, Franco;
2008
Abstract
Photochromic compounds are of growing interest and, especially, the possibility of switching fluorescence properties with photochromic molecules has great potential for various technological applications, including the design of molecular-based optical memories. In this work, we introduce a new switching concept on the basis of a dyad (Fig.1) consisting of a perylene bisimide (PBI) fluorescent dye and a diarylethene (DAE) derivative. The present photochromic system allows non-destructive read-out, as a result of the fluorescence switching achieved by intramolecular photoinduced electron transfer (PET) from the excited PBI to the closed form of DAE moiety. In contrast with many previously reported optical memory systems, Förster resonance energy transfer (FRET) is ruled out, thus avoiding destructive read-out due to photochromic cycloreversion.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
