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- W2508707899 abstract "Abstract The spectroscopic properties and the photophysical behaviour of a novel environment-sensitive 3-(4-dimethylamino)phenyl-5-phenyl-8-CF 3 -difluoroboradiazindacene (BODIPY 1 ) in different solvents are reported. The dye 1 , bearing strong electron-donating substituent in the phenyl ring at the 3-position and strong electron-accepting substituent at position 8 fluoresces intensively and has a lifetime in the nanosecond range only in saturated hydrocarbons and CCl 4 . In other solvents, this BODIPY dye fluoresces very weakly (by a factor of ∼ 10 −4 ) and the fluorescence lifetime decreases due to the increase in the rate of non-radiative deactivation of the excited state. Based on experimental data, fluorescence quenching of the BODIPY 1 in polar solvents is attributed to a population of a twisted charge transfer excited state (TICT) as the solvent polarity increases. Protonation of BODIPY 1 in polar media completely suppresses the formation of the TICT-state and leads to a significant increase of fluorescence intensity that makes this dye a very sensitive pH fluorescent sensor in the important spectral region (λ abs (max)≥665 nm, λ em (max)≥695 nm)." @default.
- W2508707899 created "2016-09-16" @default.
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- W2508707899 date "2017-01-01" @default.
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- W2508707899 title "Novel environment-sensitive 8-CF 3 -BODIPY dye with 4-(dimethylamino)phenyl group at the 3-position: Synthesis and optical properties" @default.
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- W2508707899 doi "https://doi.org/10.1016/j.dyepig.2016.09.009" @default.
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