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- W2039105280 endingPage "4303" @default.
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- W2039105280 abstract "The linear photophysical, excited state absorption (ESA), superfluorescence, and two-photon absorption (2PA) properties of 4,4′-(1E,1′E)-2,2′-(7,7′(1E,1′E)2,2′(4,4′-sulfonylbis(4,1-phenylene))bis(ethane-2,1-diyl)bis(9,9-didecy-9H-fluorene7,2-diyl))bis(ethane-2,1-diyl)bis(N,N-diphenylaniline) (1) were investigated in organic and aqueous media with respect to its potential application in biological imaging. The analysis of linear photophysical properties revealed a rather complex nature of the main one-photon absorption band, strong solvatochromic effects in the steady-state fluorescence spectra, single-exponential fluorescence decay, and high fluorescence quantum yields in organic solvents (≈1.0). The ESA spectra of 1 suggested potential for light amplification in nonpolar media while efficient superfluorescence in cyclohexane was demonstrated. The degenerate 2PA spectra of 1 were obtained over a broad spectral range (640–900 nm), using a standard two-photon induced fluorescence method under 1 kHz femtosecond excitation. Two well defined 2PA bands with maximum 2PA cross sections up to 1700 GM in the higher energy, short wavelength band and ≈1200 GM in the lower energy, long wavelength band of 1 were shown. The potential use of 1 in bioimaging was demonstrated via one- and two-photonin vitrofluorescence imaging of HCT 116 cells." @default.
- W2039105280 created "2016-06-24" @default.
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- W2039105280 date "2011-01-01" @default.
- W2039105280 modified "2023-09-25" @default.
- W2039105280 title "A superfluorescent fluorenyl probe with efficient two-photon absorption" @default.
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- W2039105280 doi "https://doi.org/10.1039/c0cp01511c" @default.
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