Manipulating noncovalent conformational lock via side-chain engineering for luminescence at aggregate level  

作　　者：Mingbing Lian Yingxiao Mu Zecong Ye Ziying Lu Jingping Xiao Jianyu Zhang Shaomin Ji Haoke Zhang Yanping Huo Ben Zhong Tang 

机构地区：[1]School of Chemical Engineering and Light Industry,Analytical and Testing Center,Guangdong University of Technology,Guangzhou,China [2]Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials,University of Groningen,Groningen,The Netherlands [3]MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou,China [4]School of Science and Engineering,Shenzhen Institute of Aggregate Science and Technology,The Chinese University of Hong Kong,Guangdong,China

出　　处：《Aggregate》2024年第4期349-359,共11页聚集体（英文）

基　　金：financially supported by the National Natural Science Foundation of China(grant numbers 22205040,U2001222,and 52273168);the Basic and Applied Basic Research Foundation of Guangdong Province(grant number 2021A1515110417);J.Zhang acknowledges the support from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie actions grant(101105790)。

摘　　要：The unfavorable photochemical processes at the molecular level have become a bar-rier limiting the use of aromatic amides as high-performance luminescent materials.Herein,we propose a reliable strategy for manipulating noncovalent conformational lock(NCL)via side-chain engineering to burst out eye-catching luminescence at the aggregate level.Contrary to the invisible emission in dilute solutions,dyad OO with a three-centered H-bond gave the wondrous crystallization-induced emis-sion with a quantum yield of 66.8%and clusterization-triggered emission,which were much brighter than those of isomers.Theoretical calculations demonstrate that crystallization-induced planarized intramolecular charge transfer(PICT),con-formation rigidification,and through-space conjugation(TSC)are responsible for aggregate-state luminescence.Robust NCL composed of intramolecular N-H⋅⋅⋅Ointeractions could boost molecular rigidity and planarity,thus greatly facilitating PICT and TSC.This study would inspire researchers to design efficient luminescent materials at the aggregate level via rational conformational control.

关 键 词：aromatic amide clusterization-triggered emission crystallization-induced emission noncovalent confor-mational lock side-chain engineering 

分 类 号：O62[理学—有机化学]