New Dye/Dendrimer Photoinitiating Systems Operating under Visible Radiation: Eco‐Friendly Synthesis of Highly Viscous Polymers. Issue 29 (1st August 2022)

• Record Type: Journal Article
• Authors: Militello, María Paula; Gambetta, Carolina; Ramírez, María Laura; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Arbeloa, Ernesto Maximiliano
• Is Part Of: ChemistrySelect. Volume 7:Issue 29(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-01
• Subjects: PAMAM dendrimers -- photopolymerization -- solar radiation -- xanthenic dyes; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202201933
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A series of new eco‐friendly photoinitiating systems (PIs) based on several water‐soluble xanthenic dye/PAMAM dendrimer formulations are tested by polymerizing a typical vinyl monomer such as acrylamide. After irradiation with visible LEDs, solutions of viscosity up to 15‐fold higher than those with PIs based on low molecular weight amines are obtained. A correlation between solution viscosity and dendrimer structure is also observed. Polymers with ultra‐high molecular weights up to around 10 7 are estimated from viscosimetric assays. In addition, very fast reactions are observed under direct solar radiation and the properties of the thus obtained polymers are similar to those synthesized with LEDs. The present findings are promissory for future research and technological applications of the PIs evaluated. Abstract : The photopolymerization is an increasing technological and research area. Here it is described new dye/dendrimer photoinitiating systems (PIs) operating in eco‐friendly conditions, such as aqueous solution and visible light. Polymers with ultra‐high molecular weight were obtained in comparison with typical dye/amine PIs. The dye/dendrimer PIs evaluated also showed good performance under solar radiation.