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New 1,8-Naphthalimide Derivatives as Photoinitiators for Free-Radical Polymerization Upon Visible Light

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Figure 1. UV-visible absorption spectra of (1) Napht-A1, (2) Napht-A2, (3) Napht-A3, (4) Napht-B2, (5) Napht-C, (6) Napht-B1; in acetonitrile.
Table 1. Maximum absorption wavelengths (in the near visible range) and associated extinction coefficients and molar extinction coefficients for the investigated compounds at the wavelengths of the different light-emitting diodes (LEDs) used (in acetonitri
Figure 3. Photopolymerization profiles of Mix-MA under air (methacrylates function conversion vs.
Figure 5. RT-FTIR photopolymerization profiles (C=C conversion of Mix-MA resin vs. irradiation time upon LED@405 nm of (1) the resin Mix-MA alone; (2)–(5) in the presence of Napht-B1: (2) alone in the monomer; in combination with (3) Ar 2 I + PF 6 −
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