Wang Nianwei, Hong Ran, Zhang Gong, Pan Menghan, Bao Yinglong, Zhang Wei
State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China.
School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, 241000, P. R. China.
Small. 2025 Mar;21(10):e2409078. doi: 10.1002/smll.202409078. Epub 2024 Nov 17.
Circularly polarized luminescence (CPL) plays a crucial role in the fields of optical display and information technology. The pursuit of high dissymmetry factors (g) and fluorescence quantum yields in CPL materials remains challenging due to inherent trade-offs. In this work, molecular imprinting technology is employed to develop novel CPL-active polymer films based entirely on achiral fluorene-based polymers, achieving an enhanced g value exceeding 4.2 × 10 alongside high quantum yields. These chiral molecularly imprinted polymer films (MIPF) are synthesized via a systematic three-step process: co-assembly with limonene and a porphyrin derivative (TBPP), interchain crosslinking, and subsequent removal of small molecules. During this process, limonene acts as the chiral inducer, while TBPP serves dual roles as both the chiral enhancer and imprinted molecule. The elimination of TBPP creates chiral sites for various fluorescent molecules, facilitating full-color CPL emission. The chiral MIPF exhibits stable CPL performance even after multiple cycles of post-assembly and removal. Furthermore, these films can function as interfacial microreactors, enabling in situ chemical reactions that dynamically regulate CPL signals. Additionally, chiral self-organization within achiral azobenzene polymer films can also be achieved using MIPF, serving as intense chiral light sources.
圆偏振发光（CPL）在光学显示和信息技术领域发挥着至关重要的作用。由于内在的权衡，在CPL材料中追求高不对称因子（g）和荧光量子产率仍然具有挑战性。在这项工作中，采用分子印迹技术开发了完全基于非手性芴基聚合物的新型CPL活性聚合物薄膜，实现了超过4.2×10的增强g值以及高量子产率。这些手性分子印迹聚合物薄膜（MIPF）通过系统的三步过程合成：与柠檬烯和卟啉衍生物（TBPP）共组装、链间交联以及随后去除小分子。在此过程中，柠檬烯充当手性诱导剂，而TBPP兼具手性增强剂和印迹分子的双重作用。TBPP的去除为各种荧光分子创造了手性位点，促进了全色CPL发射。即使经过多次组装后和去除的循环，手性MIPF仍表现出稳定的CPL性能。此外，这些薄膜可以用作界面微反应器，实现原位化学反应以动态调节CPL信号。此外，使用MIPF还可以在非手性偶氮苯聚合物薄膜内实现手性自组装，用作强手性光源。
