Heteroleptic Copper(I) Complexes with Pyridine-Benzothiazole Ligands as Photocatalysts for Free Radical Photopolymerization and 3D Printing

Autor(es)

Pesqueira, Naralyne M. ; Morlet-Savary, Fabrice ; Schmitt, Michael ; Jouaiti, Abdelaziz ; Goi, Beatriz E. ; Mauro, Matteo ; Lalevee, Jacques

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED POLYMER MATERIALS; v. N/A, p. 9-pg., 2025-02-06.

Resumo

Copper(I) complexes have attracted considerable attention as efficient redox photocatalysts (PCs) in photopolymerization. In this study, two copper(I) complexes bearing a pyridine-benzothiazole ligand were thoroughly investigated as photocatalysts for the free radical photopolymerization of ethoxylated trimethylolpropane triacrylate under violet and green light irradiation. A three-component system comprising a copper complex, di-tert-butyl-diphenyl iodonium hexafluorophosphate, and ethyl dimethylaminobenzoate as additives was investigated under various conditions. The copper complexes exhibited remarkable photoinitiation capabilities, achieving high monomer conversion rates and highlighting significant structure-reactivity relationships. Based on free energy calculations and spectroscopic analyses, a mechanistic pathway was proposed. The optimal conditions were successfully applied in 3D printing, producing smooth and uniform 3D structures. (AU)

• Processo FAPESP: 21/11873-1 - Complexos organometálicos de Mn(II), Fe(II) e Ni(II) como fotocatalisadores redox da CRP2: nova estratégia para fotopolimerização com LEDs
• Beneficiário: Beatriz Eleutério Goi Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/11741-8 - Desenvolvimento de novos complexos de Ni(II) para reações de fotopolimerização radicalar controlada (foto-OMRP e CRP2) e aplicação em impressão 3D
• Beneficiário: Naralyne Martins Pesqueira
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 22/16213-2 - Fotopolimerização radicalar controlada (CRP2) e aplicação em impressão 3D usando novos complexos de Ni(II)
• Beneficiário: Naralyne Martins Pesqueira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto