Room-temperature phosphorescence (RTP) materials have attracted much attention due to their unique luminescence properties. However, it is very challenging to tune the afterglow color of pure amorphous polymers by using only one kind of phosphor unit so far. Here, we proposed a strategy to induce pyrene derivatives (VPY) into the main chain of the polymer by free radical copolymerization, followed by alcoholysis to form poly(vinyl alcohol) derivative materials (PVA–PVPY) with strong hydrogen bond network structures. It was surprising that the obtained intrinsic polymers containing only one kind of phosphor unit achieved multicolor long-lived RTP. The RTP performance of the obtained polymers exhibited concentration, excitation, and time dependence. The experimental and theoretical results demonstrated that these characteristics were attributed to the different aggregated states of phosphor units in polymer chains, which revealed the luminescence mechanism of the aggregated and isolated states of phosphor units to produce multicolor RTP. In addition, we explored the application of these polymers based on color-tunable RTP properties in information encryption and flexible wearables. This strategy contributes to the development of multicolored smart luminescent materials as well as flexible wearable materials.

中文翻译：

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仅含一个磷光体单元的本征聚合物实现多色室温磷光


室温磷光（RTP）材料因其独特的发光性能而备受关注。然而，迄今为止仅使用一种荧光粉单元来调节纯非晶聚合物的余辉颜色非常具有挑战性。在这里，我们提出了一种策略，通过自由基共聚将芘衍生物（VPY）引入聚合物的主链，然后醇解形成具有强氢键网络结构的聚（乙烯醇）衍生材料（PVA-PVPY）。令人惊讶的是，所获得的仅含有一种荧光体单元的本征聚合物实现了多色长寿命RTP。所得聚合物的 RTP 性能表现出浓度、激发和时间依赖性。实验和理论结果表明，这些特性归因于聚合物链中荧光粉单元的不同聚集态，揭示了荧光粉单元的聚集态和孤立态产生多色RTP的发光机制。此外，我们还探索了这些基于颜色可调 RTP 特性的聚合物在信息加密和柔性可穿戴设备中的应用。该策略有助于开发彩色智能发光材料以及柔性可穿戴材料。