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Published on: March 5, 2019
Amplifying the excited state chirality through self-assembly and subsequent enhancement via plasmonic silver
Kuo Fu1, Xue Jin2, Minghao Zhou2
1College of Chemistry and Environmental Engineering, Low dimensional Materials, Genome Initiative Shenzhen University, 1066 Xueyuan Avenue, Nanshan, Shenzhen, 518055, P.R. China. zqyu@szu.edu.cn and CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China. duanpf@nanoctr.cn.
Abstract:
The development of circularly polarized luminescent materials with a large luminescence dissymmetry factor (glum) is continuing to be a big challenge. Here, we present a general approach for amplifying circular polarization of circularly polarized luminescence (CPL) through intergrating molecular self-assembly and surface plasmon resonance (SPR). Molecular self-assembly could amplify the CPL performance. Subsequently, the composites built of nanoassemblies and achiral silver nanowires (AgNWs) show intense CPL activity with an amplified glum value. By applying an external magnetic field, the CPL activity of the nanoassemblies/AgNWs composites has been significantly enhanced, confirming a plasmon-enhanced circular polarization. Our design strategy based on SPR-enhanced circular polarization of the chiral emissive systems suggests that combining plasmonic nanomaterials with chiral organic materials could aid in the development of novel CPL active nanomaterials.
