6-Propionyl-2- fluorescence spectra

Thiophene, 2-phenyl-fluorescence spectrum, 4, 735 (7UOC2236) Thiophene, 2-propionyl-... 

Another example of intramolecular CT complex formation is provided by trans-4-dimethvlamino-4 -(1-oxobutvl)stilbene Solvent effects on the spectrum give a value of 22D for the excited state dipole moment. The effect of electric field on the fluorescence of 4-(9-anthry1)-N.N.-2.3,5,G-hexamethy1-aniline shows this compound forms an excited state whose dipole moment does not change with solvent . Chiral discrimination in exciplex formation between 1-dipyrenylamine and chiral amines is very weak . In the probe molecule PRODAN (6-propionyl)-2-(dimethylamino)—naphthalene the initially formed excited state converts to a lower CT state as directly evidenced by time-resolved spectra in n-butanol. Rate constants for intramolecular electron transfer have been measured in both singlet and triplet states of covalently porphyrin-amide-quinone molecules . Intramolecular excimer formation occurs during the lifetime of the excited state of bis-(naphthalene)hydrazides which are used as photochemical deactivators of metals in polyethylene . ... 

F re 6.21 Solvent-polarity effect on fluorescence emission spectrum. Ruorescence emission spectrum of 6-propionyl-2-(dimethylamino)naphthalene (PRODAN) in various solvents. From left (o right cyclohexane, chlorobenzene, dimethylformamide, ethanol, water. See text From G. Weber and F.J. Fanis. Biochemistry 18 (1979) 3075. 

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