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- W2018610497 abstract "Abstract Two novel N -heterocycle-containing benzotriazole compounds, 5-(5-chloro-2-benzotriazolyl)-6-hydroxy-1,4-dimethyl-3-carbonitrile-2-pyridone ( 2 ) and 4-(5-chloro-2-benzotriazolyl)-5-methyl-2-phenyl-3-pyrazolone ( 4 ), were synthesized from reactant 4-chloro-2-nitroaniline via diazotization, azo coupling, reductive cyclization and acidification. Their structures were confirmed by FT-IR, 1 H NMR, mass spectroscopy and elemental analysis. Their spectral properties were investigated and compared with that of a common commercial benzotriazole UV absorber Tinuvin 326. It is found that the novel N -heterocycle-containing benzotriazole compounds exhibit sharp single peak in the range of 280–400 nm and have much higher molar extinction coefficients than that of Tinuvin 326. Their anti-UV protection properties on polyester fabric were also evaluated and compound 4 was much superior to compound 2 due to its higher exhaustion." @default.
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- W2018610497 date "2012-09-01" @default.
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- W2018610497 title "Synthesis, spectroscopic properties and applications of novel N-heterocycle-containing benzotriazoles as UV absorbers" @default.
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- W2018610497 doi "https://doi.org/10.1016/j.cclet.2012.06.024" @default.
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