Herein, we report a photochemical strategy for generating excited state species from naphthylamines, which does not rely upon any metal- or organic-based photoredox catalysts (Scheme 1).
In the self-sensitizations cycle, naphthylamines is converted to the excited singlet state under the sunlight irradiation.
We have developed a green efficient access to iminoquinones from naphthylamines based on the photooxygenation and self-sensitizations, in which naphthylamines play a dual role of providing both photosensitizer and substrate, and [O.sub.2] functions as triplet state trapping agent and oxygen source.
During a systematic study of pharmaceutical drugs, it was found that ibuprofen reacts with a - naphthylamine and sodium nitrite to give orange color at value of 460 nm.
0.05g of a - naphthylamine was dissolved in 1.5 mL ethanol in a 100 mL measuring flask and the volume was made up to the mark with distilled water.
To 1 mL Ibuprofen (1 mg/mL), 2 mL of a - naphthylamine (0.05%) and 1 mL of sodium nitrite (2%) was added.
To study the effect of temperature on the color of the reaction, 1 mL Ibuprofen (1 mg/mL) was mixed with 2 mL of a - naphthylamine (0.05%) and 1 mL of sodium nitrite (2%).
To study the effect of heating time on the color reaction, 1 mL Ibuprofen (1 mg/mL) was mixed with 2 mL of a - naphthylamine (0.05%) and 1 mL of sodium nitrite (2%) and the mixture was heated at 70 degC in a water bath for different time intervals.
To study the effect of concentration of a - Naphthylamine on the color of the reaction, various concentrations of a - Naphthylamine were mixed with 1 ml of Ibuprofen (1 mg/ml) and 1 ml of sodium nitrite (2%).
Approximately 33 million tons of tobacco wastewater is discharged in China every year, which includes many toxic substances such as nicotine, aminobiphenyl,
naphthylamine, and benzo(a)pyrene [3, 4].
The influence of interference compounds namely a-
naphthylamine was also investigated at platinum electrode only, versus silver/silver chloride saturated potassium chloride.
Generation of hydrogen peroxide and superoxide anion from active metabolites of
naphthylamines and aminoazo dyes: Its possible role in carcinogenesis.