Moving Towards Greener Cationic Polymerizations

Design, Synthesis and Use of Phthalocyanines as a New Class of Visible-Light Photoinitiators for Free-Radical and Cationic Polymerizations

Polymer Chemistry ◽

10.1039/d1py00462j ◽

2021 ◽

Author(s):

Davy-Louis Versace ◽

Louise Breloy ◽

Yusuf Yagci ◽

Ismail Yilmaz ◽

Ozgur Yavuz

Keyword(s):

Free Radical ◽

Visible Light ◽

Design Synthesis ◽

New Class ◽

Optical Stability ◽

Cationic Polymerizations

Phthalocyanines (Pcs) are interesting molecules offering a fascinating chemistry world which received tremendous interest in the last decade. Their certain features such as high thermal, chemical, and optical stability as...

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Panchromatic Copper Complexes for Visible Light Photopolymerization

Photochem ◽

10.3390/photochem1020010 ◽

2021 ◽

Vol 1 (2) ◽

pp. 167-189

Author(s):

Alexandre Mau ◽

Guillaume Noirbent ◽

Céline Dietlin ◽

Bernadette Graff ◽

Didier Gigmes ◽

...

Keyword(s):

Free Radical ◽

Visible Light ◽

Radical Polymerization ◽

Copper Complexes ◽

Free Radical Polymerization ◽

Photoluminescence Properties ◽

System Formation ◽

Iodonium Salt ◽

Visible Light Photopolymerization ◽

Cationic Polymerizations

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.

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