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.
Visible light curing of photopolymers has gained increasing interest in recent years. Dental materials are one of the important areas of application, where the bimolecular camphorquinone/amine initiator system is currently state of the art initiator. In this study, the authors describe the synthesis and photochemistry of tetrakis(2,4,6‐trimethylbenzoyl)silane, as cleavable Type I visible light photoinitiator. Besides excellent photobleaching behavior, this photoinitiator can well compete with up to now used long wavelength initiators.
In der vorliegenden Arbeit wird ein neuer Acylstannan-basierter Photoinitiator (PI) präsentiert. Im Vergleich mit Acylgerman-Initiatoren zeigt Tetrakis(2,4,6-trimethylbenzoyl)stannan (1)h erausragende Eigenschaften. Vora llem zeigt dieser Initiator Absorption bis 550 nm, was hçhere Eindringtiefen in gefüllten Systemen ermçglicht. Zusätzlich zeigt Acylstannan 1 extrem hohe Aktivitätb ei der Initiierung von (Meth)acrylaten sowies ehr schnelles Photobleaching.I mG egensatz zu vielen anderen Zinnorganylen zeigt 1 außerdem überraschend niedrige Zytotoxizität. Schema 1. Synthese von Tetrakis(2,4,6-trimethylbenzoyl)stannan (1).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.