Unconventional assemblies of bisacylhydrazones:The role of water for circularly polarized luminescence  

作　　者：Hye Jin Cho Dong Yeun Jeong Hwihyun Moon Taewoo Kim You Kyoung Chung Yeongdong Lee Zonghoon Lee Joonsuk Huh Youngmin You Changsik Song 

机构地区：[1]Department of Chemistry,Sungkyunkwan University,Suwon,Gyeonggi 16419,Republic of Korea [2]Division of Chemical Engineering and Materials Science,Graduate Program in System Health Science and Engineering,Ewha Womans University,Seoul 03760,Republic of Korea [3]Center for Multidimensional Carbon Materials,Institute for Basic Science(IBS),Department of Materials Science and Engineering,Ulsan National Institute of Science and Technology(UNIST),Ulsan 44919,Republic of Korea

出　　处：《Aggregate》2022年第5期185-193,共9页聚集体（英文）

基　　金：National Research Foundation of Korea,Grant/Award Number:2012M3A7B4049677;Nano Material Development Program,Grant/Award Number:2020R1A6A3A01100092;Basic ScienceResearch Program;Institute forBasic Science,Grant/Award Number:IBS-R019-D1。

摘　　要：Understanding the precise molecular arrangement of chiral supramolecular polymers is essential not only to comprehend complex superstructures like proteins and DNA but also for the development of next-generation optoelectronic materials,including materials displaying high-performance circularly polarized luminescence(CPL).Herein,we report the first chiral supramolecular polymer systems based on hydrazone–pyridinium conjugates comprising alkyl chains of different lengths,which afforded control of the apparent supramolecular chirality.Although supramolecular chirality is governed basically by the remote chiral centers of alkyl chains,helicity inversion was achieved by controlling the conditions under which the hydrazone building blocks underwent aggregation(i.e.,solvent compositions or temperature).More importantly,the addition of water to the system led to aggregationinduced hydrazone deprotonation,which resulted in a completely different selfassembly behavior.Structural water molecules played an essential role,forming the assembly’s channel-like backbone,around which hydrazone molecules gathered as a result of hydrogen bonding interactions.Further co-assembly of an achiral hydrazone luminophore with the given supramolecular polymer system allowed the fabrication of a novel CPL-active hydrazone-based material exhibiting a high maximum value for the photoluminescence dissymmetry factor of -2.6×10^(-2).

关 键 词：circularly polarized luminescence(CPL) helicity control hydrazone SELF-ASSEMBLY structural water supramolecular polymerization 

分 类 号：O62[理学—有机化学]