2-Amino-7-nitro-fluorenes in neat and mixed solvents-optical band shapes and solvatochromism

Femtosecond transient absorption spectroscopy of amino-nitro-fluorenes in the ultraviolet (UV)-visible range has shown that the dynamic Stokes shift of the emission band is sensitive to infrared-active modes of the solvent. The solvatochromic plots have differed significantly from those that use peak positions of absorption spectra and fluorescence quantum distributions.