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The thesis enhances the strategy of non-destructive fluorescence read-out in rylene bisimide-diarylethene containing photochromic systems. The fluorescence of the emitter unit is quenched by a photoinduced electron transfer only to one of the isomeric forms of the photochrome. The driving force of the fuorescence-quenching electron transfer was calculated by the help of the Rehm-Weller equation. The novel photochromic systems satisfy the necessary requirements for non-destructive read-out in write/read/erase fluorescent memory devices.