Synthesis, photochemical characterization, and thermal stability of a series of substituted formamidines as ultraviolet light absorbers

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 ab...

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Bibliographic Details
Published in:Journal of vinyl & additive technology 2019-03, Vol.25 (s2), p.E108-E113
Main Authors: Wang, Bei, Zhang, Pei‐Zhi, Xia, Jia‐Mei, Jia, Ai‐Quan, Zhang, Qian‐Feng
Format: Article
Language:English
Subjects:
Absorbance
Absorbers
Aluminum
Chemical synthesis
Fluorescence
Formic acid
Lead
NMR
Nuclear magnetic resonance
Polymers
Stability analysis
Substitutes
Thermal stability
Thermodynamic properties
Ultraviolet radiation
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Summary: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
ISSN:1083-5601
1548-0585
DOI:10.1002/vnl.21699