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Rational Design of New Thiazolo[BOND]Thiazole Dyes as Input Energy Units in Molecular Dyads



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Bridge over troubled water: Highly fluorescent thiazolo[BOND]thiazole dyes with quantum yields of up to 60 % were prepared in a facile synthesis from dithiooxamide and various aldehydes. When adequately engineered, such dyes could be used as fluorescent bridges with other dyes. A sequence of highly efficient, intramolecular electronic-energy-transfer steps followed from selective illumination of the fluorescent centre in the molecular triads.