Employing Lactam Copolymerization Strategy to Effectively Achieve Pure Organic Room-Temperature Phosphorescence in Amorphous State

Pure organic, amorphous room-temperature phosphorescent (RTP) materials have aroused great attention because of their easy preparation and wide applications. Herein, several metal-free, amorphous, lactam phosphorescent copolymers are prepared. Copolymers of N-vinylpyrrolidone (NVP) and N-vinylcaprolactam (NVCL) with small amounts of monomers exhibit diverse RTP emissions. The rigid polymer matrices of poly(N-vinylpyrrolidone) (PVP) and poly(N-vinylcaprolactam) (PNVCL) effectively help to inhibit nonradiative transition process of phosphors, which enhances the RTP emission. Furthermore, outstanding biocompatibility, low cost, and highly hydrophilic character make these PVP- and PNVCL-based RTP copolymer materials potentially applicable in various fields.