scholarly journals Panchromatic Copper Complexes for Visible Light Photopolymerization

Photochem ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 167-189
Author(s):  
Alexandre Mau ◽  
Guillaume Noirbent ◽  
Céline Dietlin ◽  
Bernadette Graff ◽  
Didier Gigmes ◽  
...  

In this work, eleven heteroleptic copper complexes were designed and studied as photoinitiators of polymerization in three-component photoinitiating systems in combination with an iodonium salt and an amine. Notably, ten of them exhibited panchromatic behavior and could be used for long wavelengths. Ferrocene-free copper complexes were capable of efficiently initiating both the radical and cationic polymerizations and exhibited similar performances to that of the benchmark G1 system. Formation of acrylate/epoxy IPNs was also successfully performed even upon irradiation at 455 nm or at 530 nm. Interestingly, all copper complexes containing the 1,1′-bis(diphenylphosphino)ferrocene ligand were not photoluminescent, evidencing that ferrocene could efficiently quench the photoluminescence properties of copper complexes. Besides, these ferrocene-based complexes were capable of efficiently initiating free radical polymerization processes. The ferrocene moiety introduced in the different copper complexes affected neither their panchromatic behaviors nor their abilities to initiate free radical polymerizations.

2021 ◽  
Author(s):  
Andrea Nitti ◽  
Angelo Martinelli ◽  
Fabrice Batteux ◽  
Stefano Protti ◽  
Maurizio Fagnoni ◽  
...  

The polymerization of a broad range of electron-poor olefins has been achieved under free-radical conditions by using arylazo sulfones as visible light photoinitiators. The process proceeds smoothly at room temperature...


Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 637 ◽  
Author(s):  
Aude-Héloïse Bonardi ◽  
Soraya Zahouily ◽  
Céline Dietlin ◽  
Bernadette Graff ◽  
Fabrice Morlet-Savary ◽  
...  

Photopolymerization processes, and especially those carried out under visible light, are more and more widespread for their multiple advantages compared to thermal processes. In the present paper, new 1,8-naphthalimide derivatives are proposed as photoinitiators for free-radical polymerization upon visible light exposure using light-emitting diodes (LEDs) at 395, 405, and 470 nm. These photoinitiators are used in combination with both iodonium salts and phosphine. The synthesis of these compounds as well as their excellent polymerization initiation ability for methacrylate monomers are presented in this article. A full picture of the involved chemical mechanisms is also provided thanks to photolysis, radical characterization, and redox measurements.


2017 ◽  
Vol 56 (11) ◽  
pp. 3103-3107 ◽  
Author(s):  
Judith Radebner ◽  
Anna Eibel ◽  
Mario Leypold ◽  
Christian Gorsche ◽  
Lukas Schuh ◽  
...  

2003 ◽  
Vol 204 (18) ◽  
pp. 2233-2239 ◽  
Author(s):  
O. García ◽  
A. Costela ◽  
I. García-Moreno ◽  
R. Sastre

2020 ◽  
Vol 22 (23) ◽  
pp. 8289-8297
Author(s):  
Jong-Ho Back ◽  
Yonghwan Kwon ◽  
Juan Carlos Roldao ◽  
Youngchang Yu ◽  
Hyun-Joong Kim ◽  
...  

Solvent-free acrylic pressure-sensitive adhesives were prepared via visible-light driven photocatalytic free radical polymerization. Combined experiments and quantum calculations divulged the origin of the enhanced rate of polymerisation in the presence of N-vinyl monomers.


2011 ◽  
Vol 44 (19) ◽  
pp. 7594-7599 ◽  
Author(s):  
Guan Zhang ◽  
In Young Song ◽  
Kyo Han Ahn ◽  
Taiho Park ◽  
Wonyong Choi

2018 ◽  
Vol 51 (24) ◽  
pp. 10104-10112 ◽  
Author(s):  
J. Zhang ◽  
K. Launay ◽  
N. S. Hill ◽  
D. Zhu ◽  
N. Cox ◽  
...  

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