Polymer-based pure organic room temperature phosphorescence (RTP) materials have garnered considerable interest, among which RTP systems with prolonged lifetimes and tunable emission colors are promising for applications in sensing, flexible electronics, bioassay, anti-counterfeiting, and data encryption. Herein, facile doping method is reported based on two types of copolymers with benzene/biphenyl-based light-emitting cores as their side chains, whereby the two copolymers are robustly crosslinked via noncovalent interactions including hydrogen bonding and halogen bonding that occur between the light-emitting cores and polyacrylamide backbones. Persistent RTP emission with prolonged lifetime up to 1.9 s and phosphorescence quantum yield as high as 40.1% are obtained in single copolymers, attributed to the conformation restriction of phosphorescent dyes originating from the rigid microenvironment. Furthermore, multicolor phosphorescence signals are observed in the doped binary luminescent copolymer systems that can be effectively regulated by the feed ratio of luminescent cores and irradiation wavelengths. Possible mechanisms for this efficient and long-lived color-tunable RTP system are discussed on the basis of the experimental data and theoretical calculations. In addition, it is also demonstrated that the color-tunable RTP emission of the doped copolymer systems under ambient conditions allows for further exploitation in the application of dynamic information encryption.

中文翻译：

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基于聚丙烯酰胺的二元发光共聚物材料表现出颜色可调且高效的长寿命室温磷光

基于聚合物的纯有机室温磷光 (RTP) 材料引起了相当大的兴趣，其中具有更长寿命和可调发射颜色的 RTP 系统有望用于传感、柔性电子、生物测定、防伪和数据加密。本文报道了一种基于两种类型的共聚物的简便掺杂方法，这些共聚物以苯/联苯为基础的发光核作为其侧链，这两种共聚物通过非共价相互作用牢固地交联，包括氢键和卤素键之间发生的光-发射核和聚丙烯酰胺主链。在单一共聚物中获得了持久的 RTP 发射，寿命延长至 1.9 秒，磷光量子产率高达 40.1%，归因于源自刚性微环境的磷光染料的构象限制。此外，在掺杂二元发光共聚物系统中观察到多色磷光信号，可以通过发光核的进料比和照射波长有效调节。在实验数据和理论计算的基础上讨论了这种高效且长寿命的颜色可调 RTP 系统的可能机制。此外，还证明了掺杂共聚物系统在环境条件下的颜色可调 RTP 发射允许进一步开发动态信息加密的应用。在掺杂二元发光共聚物体系中观察到多色磷光信号，可以通过发光核的进料比和照射波长进行有效调节。在实验数据和理论计算的基础上讨论了这种高效且长寿命的颜色可调 RTP 系统的可能机制。此外，还证明了掺杂共聚物系统在环境条件下的颜色可调 RTP 发射允许进一步开发动态信息加密的应用。在掺杂二元发光共聚物体系中观察到多色磷光信号，可以通过发光核的进料比和照射波长进行有效调节。在实验数据和理论计算的基础上讨论了这种高效且长寿命的颜色可调 RTP 系统的可能机制。此外，还证明了掺杂共聚物系统在环境条件下的颜色可调 RTP 发射允许进一步开发动态信息加密的应用。