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- W2046663801 abstract "The excited state proton transfer (ESPT) reaction of aminocoumarins containing primary (Ia, If), secondary (Ib, Ic) and tertiary (Id, Ie and IIa, IIb) 7-amino groups was studied. The limiting value of the fluorescence quantum yield (φ′∞) of the ESPT product of the 7- aminocoumarins Id and Ie, containing an unfastened tertiary amino group, is unusually low in polar solvents (ethanol (EtOH), dimethylsulphoxide (DMSO)) in contrast with 7-aminocoumarins Ia-Ic and IIb. A decrease in solvent polarity results in a strong (more than 40-fold in cyclohexane) increase in φ′∞, probably due to a decrease in the rate of non-fluorescent, cationic, twisted intramolecular charge transfer TICT) state formation." @default.
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- W2046663801 date "1995-08-01" @default.
- W2046663801 modified "2023-10-15" @default.
- W2046663801 title "Planar and twisted intramolecular charge transfer states of the excited proton transfer products of aminocoumarins" @default.
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- W2046663801 doi "https://doi.org/10.1016/1010-6030(95)04055-k" @default.
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