近日，中国科学院长春应用化学研究所王利祥团队研究了高效室温磷光的偶联吩硒嗪基共轭聚合物。2026年3月12日，《中国高分子科学杂志》发表了这一成果。

纯有机室温磷光聚合物相较于小分子晶体具有优异的加工性和柔韧性。然而，迄今为止报道的大多数室温磷光聚合物均基于非共轭聚合物，实现共轭聚合物的高效磷光发射仍是重大挑战。

研究组通过将吩硒嗪单元分别与对位和间位亚苯基单元连接形成共轭主链，开发了两种室温磷光共轭聚合物（P(PSeZPh-p-Ph)和P(PSeZPh-m-Ph)）。不同连接方式的亚苯基桥连单元调控了聚合物主链的有效π共轭程度。与对位连接的P(PSeZPh-p-Ph)相比，间位连接的P(PSeZPh-m-Ph)表现出降低的有效π共轭和增强的硒原子对前线轨道的贡献，从而获得更大的自旋-轨道耦合常数并加速磷光辐射衰减过程。

P(PSeZPh-m-Ph)在掺杂聚苯乙烯薄膜中实现了21.4%的磷光量子产率，是迄今为止纯有机室温磷光共轭聚合物报道的最高效率之一。这些共轭聚合物被用于构建磷光薄膜氧传感器，其猝灭常数（K_sv）高达14.80 kPa^-1，检测限低至0.84 ppm，展现了在氧气薄膜传感器中的应用潜力。

附：英文原文

Title: Meta-linked Phenoselenazine-based Conjugated Polymers for Efficient Room-temperature Phosphorescence

Author: Shan-Hui Gao, Zhi-Qiang Cheng, Xiao-Fu Wu, Hui Tong, Li-Xiang Wang

Issue&Volume: 2026-03-12

Abstract: Pure organic room-temperature phosphorescent (RTP) polymers possess good processability and flexibility over small molecular crystals. However, most of RTP polymers reported so far are based on non-conjugated polymers, and achieving efficient phosphorescent emission in RTP conjugated polymers (CPs) remains a significant challenge. Herein, we developed two RTP CPs (P(PSeZPh-p-Ph) and P(PSeZPh-m-Ph)) by linking the phenoselenazine units with the para- and meta-phenylene units, respectively, to form the conjugated main chains. The phenylene linker with different lingking mode manipulates the effictive π-conjugation of the polymer backbones. Comparing with the para-linked P(PSeZPh-p-Ph), meta-linked P(PSeZPh-m-Ph) exhibit the decreased effective π-conjugation and the enhanced contribution of selenium atoms to the frontier orbitals, leading to the larger spin-orbit coupling (SOC) constants and the accelerated phosphorescence radiative decay process. The P(PSeZPh-m-Ph) achieves a phosphorescence quantum yield of 21.4% in doped polystyrene films, which is among the highest efficiencies reported to date for pure organic RTP CPs. These CPs are applied to construct phosphorescent film sensors for oxygen detection with the high quenching constants (Ksv) up to 14.80 kPa–1 and low detection of limit of 0.84 ppm, demostrating the potential for application in oxygen film sensors.

DOI: 10.1007/s10118-025-3517-1

Source: https://www.cjps.org/en/article/doi/10.1007/s10118-025-3517-1/