近日，华南理工大学马东阁团队报道了研究了高不对称系数深蓝圆极化电致发光的C2对称手性发射体。相关论文于2026年3月25日发表在《德国应用化学》杂志上。

深蓝色圆偏振有机发光二极管（CP-OLEDs）由于需同时满足宽带隙与强手性光学活性的苛刻要求，目前仍较为罕见。

研究组报道了一种C2对称的手性发光体DC-TRZ，其由二聚咔唑给体与三苯基三嗪受体构成，在433 nm处呈现深蓝色发射，发光效率高达79%。其光学纯的(R)-与(S)-异构体表现出显著的科顿效应和鲜明的圆偏振发光（CPL）特性。尤为重要的是，基于(R)-和(S)-DC-TRZ的CP-OLEDs器件实现了深蓝色电致发光，其国际照明委员会（CIE）色坐标分别为(0.14, 0.07)，最大外量子效率达4.58%，并分别取得了+2.7 × 10^-2和−2.2 × 10^-2的创纪录高发光不对称因子。这些数值代表了目前报道的采用有机小分子的蓝色CP-OLEDs的最高水平。该研究结果证实了DC-TRZ作为高效深蓝色手性发光体的潜力，并凸显了C2对称轴手性作为一种高性能CP-OLED材料分子设计策略的前景。

附：英文原文

Title: A C2-Symmetric Chiral Emitter for Deep-Blue Circularly Polarized Electroluminescence With High Dissymmetry Factors

Author: Xiyun Ye, Yichao Chen, Xiaojuan Song, Tingwei Ren, Jinfeng Wang, Yujun Xie, Dongge Ma, Jishan Wu, Zhen Li

Issue&Volume: 2026-03-25

Abstract: Deep blue circularly polarized organic light-emitting diodes (CP-OLEDs) remain scarce due to the stringent requirement of simultaneously achieving a wide bandgap and strong chiroptical activity. Herein, we report DC-TRZ, a C2-symmetric chiral emitter comprising a dimeric carbazole donor and a triphenyltriazine acceptor, which exhibits deep-blue emission at 433 nm with the high emission efficiency of up to 79%. Its enantiopure (R)- and (S)-isomers display pronounced Cotton effects and distinct circularly polarized luminescence (CPL). Notably, CP-OLEDs based on (R)- and (S)-DC-TRZ deliver deep-blue electroluminescence with Commission Internationale de L'Eclairage (CIE) coordinates of (0.14, 0.07), achieving a maximum external quantum efficiency of 4.58% and record-high luminescence dissymmetry factors of +2.7 × 102 and 2.2 × 102, respectively, representing the highest values reported to date for blue CP-OLEDs employing small organic molecules. These results demonstrate that DC-TRZ functions as an efficient deep-blue chiral emitter and highlights C2-symmetric axial chirality as a promising molecular design strategy for high-performance CP-OLED materials.

DOI: 10.1002/anie.5815007

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.5815007