Ultrastable Enantiomeric Tetrapod Cu <sub>30</sub> Clusters With Near‐Infrared Circularly Polarized TADF
Abstract
ABSTRACT The development of stable Cu(I) clusters exhibiting near‐infrared circularly polarized luminescence (NIR CPL) presents a significant challenge. In addressing this challenge, we present the synthesis of ultrastable chiral R / S ‐Cu 30 clusters through a dual‐ligand strategy, which feature a tetrapod metal skeleton and represent the largest nuclearity Cu(I) cluster reported to exhibit NIR CPL. The R / S ‐Cu 30 structure is self‐assembled from five octahedral Cu 6 units. R / S ‐Cu 30 exhibits excellent NIR CPL with high quantum yields of 40% in solution, benefiting from the characteristic of stable structure and thermally activated delayed fluorescence (TADF), marking the first observation of NIR circularly polarized TADF within the Cu(I) cluster family. Due to the exceptional stability, solution processability and NIR CPL property of R / S ‐Cu 30 , the NIR‐CP light‐emitting diodes were fabricated and exhibited g EL of +1.8/−2.1 × 10 −3 and an EQE of 8% with an emission wavelength of 732 nm. This study not only presents an enantiomeric pair of tetrapod‐like Cu 30 (I) clusters but also successfully addresses the intertwined challenges of stability, efficient NIR emission, and chiral luminescence in the design of copper clusters.
Article Details
Authors (9)
Fei‐Fan Wang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Pingyuan Laboratory Zhengzhou University Zhengzhou China
Li‐Xin Zhang
Henan Key Laboratory of Crystalline Molecular Functional Materials College of Chemistry Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Zhengzhou University Zhengzhou 450001 China
Ya‐Qing Zhang
Henan Key Laboratory of Crystalline Molecular Functional Materials College of Chemistry Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Zhengzhou University Zhengzhou 450001 China
Yan Wang
Si‐Meng Zhai
Henan Key Laboratory of Crystalline Molecular Functional Materials College of Chemistry Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Zhengzhou University Zhengzhou 450001 China
Yubing Si
College of Chemistry
Jiachen Zhang
Department of Infectious Disease, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China
Zhen Han
College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
Shuang‐Quan Zang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Pingyuan Laboratory Zhengzhou University Zhengzhou China