School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China.
School of Environment, South China Normal University, Guangzhou 510006, P. R. China.
ACS Appl Mater Interfaces. 2023 Jun 28;15(25):30717-30726. doi: 10.1021/acsami.3c03207. Epub 2023 Jun 19.
The development of new polymer-based room-temperature phosphorescence materials is of great significance. By a special molecule design and a set of feasible property-enhancing strategies, coumarin derivatives (CMDs, M-M) were doped into polyvinyl alcohol (PVA), polyacrylamide (PAM), corn starch, and polyacrylonitrile (PAN) as information anti-counterfeiting. CMDs-doped PVA and CMDs-doped corn starch films showed long-lived phosphorescence emissions up to 1246 ms (M-PVA) and 697 ms (M-corn starch), reaching over 10 s afterglow under naked eye observation under ambient conditions. Significantly, CMDs-doped PAM films can display long-lived phosphorescence emissions in a wide temperature range (100-430 K). For example, the M-PAM film has a phosphorescence lifetime of 16 ms at 430 K. The use of PAM with the strong polarity and rigidity has expanded the temperature range of long-life polymer-based phosphorescent materials. The present long-lived phosphorescent systems provide the possibility for developing new polymer-based organic afterglow materials with robust phosphorescence.
新型聚合物室温磷光材料的开发具有重要意义。通过特殊的分子设计和一系列可行的性能增强策略，香豆素衍生物（CMDs，M-M）被掺杂到聚乙烯醇（PVA）、聚丙烯酰胺（PAM）、玉米淀粉和聚丙烯腈（PAN）中，作为信息防伪。掺杂 CMDs 的 PVA 和掺杂 CMDs 的玉米淀粉薄膜表现出长达 1246ms（M-PVA）和 697ms（M-玉米淀粉）的长寿命磷光发射，在环境条件下肉眼观察下，余晖时间超过 10s。值得注意的是，掺杂 CMDs 的 PAM 薄膜在很宽的温度范围内（100-430K）可以显示长寿命磷光发射。例如，M-PAM 薄膜在 430K 时的磷光寿命为 16ms。使用具有强极性和刚性的 PAM 扩展了长寿命聚合物基磷光材料的温度范围。本研究中的长寿命磷光体系为开发具有稳健磷光的新型聚合物基有机余晖材料提供了可能性。
