Qiu Sheng-Qi, Li Mei-Yuan, Li Hua-Yue, Xiao Yao, Xiao Jiannan, Parthasarathy Gayathri, Meng Zhengong, Wong Wai-Yeung, Yu Zhen-Qiang
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China.
Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211816, China.
Angew Chem Int Ed Engl. 2025 Jun 17;64(25):e202501011. doi: 10.1002/anie.202501011. Epub 2025 Apr 21.
Chiral ion-pairing (CIP) has been developed as an effective chirality transfer strategy from chiral ionic species to its achiral counter-ionic substrate. When the achiral counter-ions were endowed with luminescent properties, the resultant chiral luminescent ion pair (CLIP) will open a new window for high-performance chiral luminescence. In this research, three pairs of CLIP molecules featuring the platinum complexes as achiral cationic luminophores and the chiral anion (CA) as chiral source were constructed. The CLIP molecules demonstrate circularly polarized phosphorescence (CPP) with quantum yields (Φ) up to 71.5%, dissymmetry factor (g) values of 1.8 × 10 in amorphous state and g up to -0.99 in cholesteric liquid crystal (CLC). Results show that the chiroptical properties can be assigned to the chirality transfer from the CAs to the formed twisted dimeric or oligomeric self-assemblies of platinum complex cations. This research presents a new approach for achieving high-performance chiral luminescence of amorphous chiral metal complexes, providing a concise model for revealing the chirality transfer in CLIP materials.
手性离子对（CIP）已发展成为一种从手性离子物种到手性非离子底物的有效手性转移策略。当手性非离子具有发光特性时，所得的手性发光离子对（CLIP）将为高性能手性发光打开一扇新窗口。在本研究中，构建了三对以铂配合物作为手性非离子阳离子发光体和手性阴离子（CA）作为手性源的CLIP分子。这些CLIP分子表现出圆偏振磷光（CPP），在非晶态下量子产率（Φ）高达71.5%，不对称因子（g）值为1.8×10，在胆甾相液晶（CLC）中g高达-0.99。结果表明，这些手性光学性质可归因于从CA到手性铂配合物阳离子形成的扭曲二聚体或寡聚体自组装的手性转移。本研究提出了一种实现非晶态手性金属配合物高性能手性发光的新方法，为揭示CLIP材料中的手性转移提供了一个简洁的模型。
