Dental Materials With Light-Induced Reversible Coloring
申请人:Ivoclar Vivadent AG
公开号:US20190008728A1
公开(公告)日:2019-01-10
The invention relates to a radically polymerizable dental material having photochromic properties, which contains at least one compound of formula (I) and optionally radically polymerizable monomers, an initiator for radical polymerization and other components.
A persistent silyl radical, tris(t-butyldimethylsilyl)silyl radical, (t-BuMe2Si)3Si· (1), was produced by two new methods in addition to a conventional hydrogen abstraction from the corresponding hydrosilane: one-electron oxidation of (t-BuMe2Si)3SiNa (2) by NO+BF4− and one-electron reduction of (t-BuMe2Si)3SiBr (3) by sodium.