Zhangsun Hui, Xu Liguang, Qu Aihua, Xu Chuanlai, Kuang Hua, Hao Changlong
State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P.R. China.
Angew Chem Int Ed Engl. 2025 Feb 17;64(8):e202419884. doi: 10.1002/anie.202419884. Epub 2025 Jan 29.
Circularly polarized luminescence (CPL) has garnered significant research attention. Achieving a high luminescence dissymmetry factor (g) is a key challenge in this field. Herein, we reported, for the first time, the fabrication of a chiral assembled film consisting of chiral D-/L-Selenium nanoparticles (D-/L-Se NPs) and DSPE-PEG-NH modified upconversion nanoparticles (DPNUCNPs) with remarkable CPL properties that were generated by the interfacial self-assembly technique. The chiral Se/DPNUCNPs films, consisting of three layers (3L) of D-/L-Se films and 3L DPNUCNPs films, exhibited the highest circular dichroism (CD) response and the strongest CPL signals. Under laser excitation at 980 nm, the 3L D-/L-Se/3L DPNUCNPs assembled films displayed symmetric CPL signals between 400 and 600 nm, with a maximum |g| value of 0.68. The interaction between DPNUCNPs and Se NPs involves energy transfer and chirality transfer, along with the formation of spin-polarized excitons, thereby resulting in CPL activity. Furthermore, the chiral Se/DPNUCNPs films were patterned for anti-counterfeit and encryption applications. Our study provides a novel guide for fabricating chiral nanomaterials with strong CPL response.
圆偏振发光（CPL）已引起了广泛的研究关注。实现高发光不对称因子（g）是该领域的一项关键挑战。在此，我们首次报道了通过界面自组装技术制备的一种由手性D-/L-硒纳米颗粒（D-/L-Se NPs）和DSPE-PEG-NH修饰的上转换纳米颗粒（DPNUCNPs）组成的手性组装薄膜，该薄膜具有显著的CPL特性。由三层（3L）D-/L-Se薄膜和3L DPNUCNPs薄膜组成的手性Se/DPNUCNPs薄膜表现出最高的圆二色性（CD）响应和最强的CPL信号。在980 nm激光激发下，3L D-/L-Se/3L DPNUCNPs组装薄膜在400至600 nm之间显示出对称的CPL信号，最大|g|值为0.68。DPNUCNPs与Se NPs之间的相互作用涉及能量转移和手性转移，以及自旋极化激子的形成，从而产生CPL活性。此外，手性Se/DPNUCNPs薄膜被用于防伪和加密应用的图案化处理。我们的研究为制备具有强CPL响应的手性纳米材料提供了一种新的指导。
