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• W2053917615 abstract "► Four compounds with oxazole and benzene rings have been synthesized. ► The ICT was observed with the enhancing of the electron-donor ability. ► 5-Methyl-2-(p- N , N -diphenylamino phenyl)-4-acetyl oxazole shows obvious ICT. A series of oxazole derivatives, 5-methyl-2-( p -methylphenyl)-4-acetyl oxazole (MMPAO), 5-methyl-2-( p -methoxyphenyl)-4-acetyl oxazole (MOPAO), 5-methyl-2-( p - N , N ′-dimethylamino-phenyl)-4-acetyl oxazole (MDMAPAO) and 5-methyl-2-( p - N , N ′-diphenylaminophenyl)-4-acetyl oxazole (MDPAPAO) have been synthesized and studied to compare their photophysical properties. The UV–visible absorption spectra of MDMAPAO and MDPAPAO are bathochromatically shifted as compared to that of MMPAO and MOPAO. The fluorescence emission of MDPAPAO is very sensitive to the polarity of solvents. The magnitude of change in the dipole moment was calculated using the Lippert–Mataga equation. MDPAPAO shows the highest change in the dipole moment (Δ u = 13.3D) than that of the other three oxazole derivatives. The spectral properties including fluorescence quantum yield and lifetime were determined in solvents with different polarities. MDPAPAO displays the highest fluorescence quantum yield and lifetime, following a bi-exponential fluorescent decay fashion. Our result demonstrates that the excited state of MDPAPAO possesses the property of intramolecular charge transfer." @default.
• W2053917615 created "2016-06-24" @default.
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• W2053917615 date "2013-02-01" @default.
• W2053917615 modified "2023-10-16" @default.
• W2053917615 title "Synthesis and photophysical studies of oxazole rings containing compounds as electron accepting units" @default.
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• W2053917615 doi "https://doi.org/10.1016/j.saa.2012.10.005" @default.
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