Polymer-based pure organic room-temperature phosphorescence (RTP) materials have received widespread attention due to their great application prospects in many fields. However, the reports about polymer-based multicolor RTP materials were still rare. Herein, a series of monochromatic PAM-based RTP materials are constructed by facilely doping boric acid derivatives into polyacrylamide (PAM) matrices. Due to the strong intermolecular hydrogen-bonding interaction, 4-carboxyphenylboronic acid (CPBA) doped system PAM/CPBA achieves an ultralong RTP lifetime of 753 ms with a naked-eye visible blue afterglow up to 12 s. Significantly, PAM/CPBA as energy donor and the commercial fluorescent dye fluorescein (FL) or rhodamine B (RhB) as energy acceptor are used to fabricated ternary doping systems to achieve multicolor afterglow emission through phosphorescence Förster resonance energy transfer (FRET). The afterglow colors of PAM/CPBA/FL and PAM/CPBA/RhB can be easily adjusted from blue to yellow or purple by changing the doping content of FL or RhB. Inspiringly, a nearly white afterglow emission from the quaternary doping system PAM/CPBA/RhB/FL is achieved by varying the amount of FL content. Furthermore, the prepared PAM-based binary and ternary doping RTP materials can be applied in the field of information encryption.

聚合物基纯有机室温磷光（RTP）材料因其在多个领域的巨大应用前景而受到广泛关注。然而，关于聚合物基多色RTP材料的报道仍然很少。在此，通过将硼酸衍生物轻松掺杂到聚丙烯酰胺（PAM）基质中，构建了一系列基于 PAM 的单色 RTP 材料。由于强分子间氢键相互作用，4-羧基苯基硼酸（CPBA）掺杂体系PAM/CPBA实现了753 ms的超长RTP寿命，肉眼可见蓝色余辉可达12 s。值得注意的是，PAM/CPBA作为能量供体和商业荧光染料荧光素（FL）或罗丹明B（RhB）作为能量受体被用来制造三元掺杂系统，通过磷光福斯特共振能量转移（FRET）实现多色余辉发射。通过改变FL或RhB的掺杂含量，PAM/CPBA/FL和PAM/CPBA/RhB的余辉颜色可以轻松地从蓝色调整为黄色或紫色。令人鼓舞的是，通过改变 FL 含量，四元掺杂系统 PAM/CPBA/RhB/FL 可以实现近乎白色的余辉发射。此外，所制备的基于PAM的二元和三元掺杂RTP材料可应用于信息加密领域。