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A) Three acene DCDHF structures with increasing conjugation, and thus increasing absorption wavelength. B) Demonstrating the quantum-yield dependence on viscosity: in rigidified frozen samples, the fluorescence emission increases drastically. The “6” in the names refer to the six carbon tails on the amine. (Adapted with permission from J. Phys. Chem. A 2007, 111, 8934−8941. Copyright 2007 American Chemical Society.)
