Bei Wang, Pei-Zhi Zhang, J. Xia
Feb 1, 2019
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Journal
Journal of Vinyl and Additive Technology
Abstract
The three‐step reactions of ethyl 4‐aminobenzoate, formic acid, and halohydrocarbons afforded 10 N‐substituted‐N,N′‐diaryl‐formamidine derivatives (F1–10) as ultraviolet absorbers. These N‐substituted formamidines were characterized by 1H NMR, 13C NMR, FT‐IR, and ESI‐MS spectroscopies. The UV–vis absorbance and fluorescence properties of the compounds F1–10 were investigated in different solvents and in the presences of different metal ions. The effects of the amount of Al3+, Pb2+, Zr4+ ions on the UV–vis absorbance and fluorescence properties of compound F1 were also investigated. Moreover, the thermal stability of the compounds F1–10 was evaluated as well as the intermediate N,N′‐bis(4‐ethoxycarbonylphenyl)‐formamidine. J. VINYL ADDIT. TECHNOL., 25:E108–E113, 2019. © 2019 Society of Plastics Engineers