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AdipoGen 4-Diethylamino-hydroxyflavone
Supplier: AdipoGen CDXD0202M050
Chemical. CAS 146680-78-6. Formula C19H19NO3. MW 309.36. Synthetic. Fluorescent dye that exhibits dual band fluorescence emission which is sensitive to environmental factors. One band originates from the normal excited state N* and the other is due to the excited state intramolecular proton transfer ESPIT reaction product tautomer T*. An increase in solvent polarity and hydrogen bonding ability of the solvent leads to an increase in the population of the N* form relative to the T* form. The intensity ratio of the normal and tautomeric fluorescence bands are near 510nm and 570nm, with a main absorption band 370-420nm. There exists a latent third emission band peaked at 535nm, which is reliably recorded upon excitation at wavelengths of 470-500nm. The positions of the two bands, as well as their intensity ratios are sensitive to the local environment, making many of these compounds attractive ratiometric fluorescent sensors.
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