Assembling Octahedral Pt <sub>2</sub> Ag <sub>4</sub> Clusters for High‐Efficiency Circularly Polarized Luminescence
Abstract
Abstract Establishing atom‐precise and controllable self‐assembly of metal clusters to achieve high‐efficiency circularly polarized luminescence (CPL) is especially fascinating, yet it creates considerable challenges. Here, two enantiomeric pairs of dimer clusters R/S‐Pt 4 Ag 8 ‐green and R/S‐Pt 4 Ag 8 ‐orange composed of two octahedral Pt 2 Ag 4 monomers through Pt–Pt bonds are constructed, which show a 28‐fold increase in photoluminescence quantum yield (PLQY) compared with the reported monomer in solution. The solid‐state chiral dimer R/S‐Pt 4 Ag 8 ‐orange shows a PLQY of 87% without an aggregation‐caused quenching effect. The intercluster distances and arrangements of the chiral cluster can be modulated through the ligand configuration and solvent stimuli, giving rise to the reversible transformations between chiral single crystals, concomitant with high‐contrast optical/chiroptical switching. Additionally, by further assembling chiral Pt‐Ag clusters with Ag + , a chiral 3D cubic lattice with high‐efficiency red‐emitting CPL is achieved. Furthermore, high‐efficiency luminescence, intrinsic chirality, and the adjustable assembly behaviors of these chiral cluster assemblies bestow them with excellent smart CPL switching properties. This work opens a new avenue for high‐efficiency CPL‐active metal clusters by regulating metal‐metal interactions.
Article Details
Authors (10)
Miao‐Miao Zhang
College of Chemistry Zhengzhou University Zhengzhou China
Ran Zhang
Shi‐Yu Yang
Henan Key Laboratory of Crystalline Molecular Functional Materials and College of Chemistry Zhengzhou University Zhengzhou 450001 P. R. China
Xi‐Yan Dong
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
Chong Zhang
School of Chemistry
Yubing Si
College of Chemistry
Teng Jia
State Key Laboratory of Antiviral Drugs, Tianjian Laboratory of Advanced Biomedical Sciences, Pingyuan Laboratory, and College of Chemistry
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
Thomas C. W. Mak
College of Chemistry