Hierarchical Self-Assembly Promoted Circularly Polarized Luminescence Enhancement and Handedness Inversion of Metal–Organic Helicate  

作　　者：Shuyuan Zheng Guofeng Liu 

机构地区：[1]School of Chemical Science and Engineering,Advanced Research Institute,Tongji University,Shanghai 200092

出　　处：《CCS Chemistry》2024年第9期2198-2209,共12页中国化学会会刊（英文）

基　　金：supported by the National Natural Science Foundation of China(grant no.22101208);the Fundamental Research Funds for the Central Universities;the Program for Professors of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning.

摘　　要：In-depth studies of hierarchical self-assembly with chirality inversion and asymmetry amplification are indispensable for understanding the chiral transfer rule in assembly systems and construction of circularly polarized luminescence(CPL)active materials.Herein,a coordination-driven primary assembly of pyrene-based chiral ligand and Zn(OTf)2 was employed for the construction of homochiral metal–organic helicate with a triple helix structure,tunable emission color,and significant chirality amplification.More excitingly,the metal–organic helicate further assembled into well-ordered hierarchical nanoarchitectures with the aid of C–H⋯πinteraction andπ–πstacking,showing significant CPL enhancement and unexpected handedness inversion.Thus,the|glum|increased from 5.20×10^(−5) to 5.60×10^(−2),and the|gabs|rose from 3.80×10^(−4) to 1.04×10^(−2) over the entire hierarchical self-assembly process.The multiple supramolecular interactions not only endowed the resultant metal–organic helicate with efficient chirality transmission and tunable emission color but also guided the(supra)molecular building block of metal–organic helicate organizing into the hierarchically chiral nanoarchitecture in a directional manner.This work provides insight into the metal–organic helicate-mediated hierarchical self-assembly and aids the development of CPLactive materials with dynamic chirality modulation and enhanced chiroptical performance.

关 键 词：supramolecular chirality inversion circularly polarized luminescence metal-organic helicate hierarchically chiral assembly chirality amplification 

分 类 号：O62[理学—有机化学]