scholarly journals Aryliodonium Ylides as Novel and Efficient Additives for Radical Chemistry: Example in Camphorquinone (CQ)/Amine Based Photoinitiating Systems

Molecules ◽  
2019 ◽  
Vol 24 (16) ◽  
pp. 2913 ◽  
Author(s):  
Julie Kirschner ◽  
Julien Paillard ◽  
Mariem Bouzrati-Zerelli ◽  
Jean-Michel Becht ◽  
Joachim E. Klee ◽  
...  

Diaryliodonium salts are well-established compounds in free radical chemistry and are already used as photoinitiators (free radical or cationic polymerization), but the presence of counter anions is a strong drawback. Indeed, a counter anion is always required (e.g., SbF6−) leading to potential toxicity issues or release of HF. In the present paper, counter anion-free and fluoride-free aryliodonium salts are proposed, that is, aryliodonium ylides (AY) are studied here as new and efficient additives for radical chemistry and an example is provided for the camphorquinone (CQ)/amine based photoinitiating systems (PISs) for the polymerization of thick (1.4 mm) and thin (20–13 µm) methacrylates under air and blue light irradiation. The newly proposed PISs, for example, CQ/amine/AY, presented excellent polymerization performances and good bleaching properties were obtained after polymerization. Real-time Fourier transform infrared spectroscopy (RT-FTIR) was used to monitor the photopolymerization profiles. The chemical mechanisms involved were investigated using electron spin resonance (ESR).

2016 ◽  
Vol 49 (10) ◽  
pp. 2295-2306 ◽  
Author(s):  
Daryl Staveness ◽  
Irene Bosque ◽  
Corey R. J. Stephenson

Resonance ◽  
2005 ◽  
Vol 10 (3) ◽  
pp. 71-79
Author(s):  
G. Nagendrappa

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