Acylstannanes: Cleavable and Highly Reactive Photoinitiators for Radical Photopolymerization at Wavelengths above 500 nm with Excellent Photobleaching Behavior. Issue 37 (8th August 2018)

• Record Type: Journal Article
• Authors: Mitterbauer, Moritz; Knaack, Patrick; Naumov, Sergej; Markovic, Marica; Ovsianikov, Alexandr; Moszner, Norbert; Liska, Robert
• Is Part Of: Angewandte Chemie international edition. Volume 57:Issue 37(2018)
• Page Start: 12146
• Page End: 12150
• Publication Date: 2018-08-08
• Subjects: photobleaching -- photoinitiators -- photopolymerization -- visible light; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201804094
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Within this work, a novel acylstannane‐based photoinitiator (PI) is presented. Tetrakis(2, 4, 6‐trimethylbenzoyl)stannane (1 ) displays outstanding properties compared to state‐of‐the‐art acylgermane‐based initiators. Most importantly, the initiator shows absorption up to 550 nm, which allows higher penetration depths, especially in highly filled photopolymers. Besides that, 1 shows extremely high photoinitiating activity towards (meth)acrylic double bonds, as well as very fast photobleaching. Furthermore, unlike many organotin compounds, 1 shows surprisingly low cytotoxicity. Abstract : A new cure : A novel acylstannane‐based visible‐light photoinitiator, tetrakis(2, 4, 6‐trimethylbenzoyl)stannane (1 ), shows absorption at wavelengths up to 550 nm, which results in higher penetration depths, especially in highly filled photopolymers. Photoinitiator 1 also shows extremely high photoinitiating activity towards (meth)acrylic double bonds, very fast photobleaching and surprisingly low cytotoxicity.