Visualizing Material Processing via Photoexcitation-ControlledOrganic-Phase Aggregation-Induced Emission  

作　　者：Jian Gu Bingbing Yue Glib V.Baryshnikov Zhongyu Li Man Zhang Shen Shen HansÅgren Liangliang Zhu 

机构地区：[1]State Key Laboratory of Molecular Engineering of Polymers,Department of Macromolecular Science,Fudan University,Shanghai 200438,China [2]College of Science,University of Shanghai for Science and Technology,Shanghai 200093,China [3]Division of Theoretical Chemistry and Biology School of Biotechnology,KTH Royal Institute of Technology,SE-10691 Stockholm,Sweden [4]Department of Physics and Astronomy,Uppsala University,Box 516,SE-75120 Uppsala,Sweden

出　　处：《Research》2021年第1期1402-1412,共11页研究（英文）

基　　金：supported by 2019 Natural Science Foundation of Shanghai(Grant No.19ZR1471700);NSFC(21975046);the National Key Research and Development Program of China(2017YFA0207700);G.B and H.Å.are thank ful to Stiftelsen Olle Engkvist Byggmästare(contract no.189-0223)for the support;The calculations were performed with computational resources provided by the High-Performance Computing Center North(HPC2N)in Umeå,Sweden,through the project“Multiphysics Modeling of Molecular Materials”SNIC 2020/3-29.

摘　　要：Aggregation-induced emission(AIE)has been much employed for visualizing material aggregation and self-assembly.However,water is generally required for the preparation of the AIE aggregates,the operation of which limits numerous material processing behaviors.Employing hexathiobenzene-based small molecules,monopolymers,and block copolymers as different material prototypes,we herein achieve AIE in pure organic phases by applying a nonequilibrium strategy,photoexcitationcontrolled aggregation.This strategy enabled a dynamic change of molecular conformation rather than chemical structure upon irradiation,leading to a continuous aggregation-dependent luminescent enhancement(up to~200-fold increase of the luminescent quantum yield)in organic solvents.Accompanied by the materialization of the nonequilibrium strategy,photoconvertible self-assemblies with a steady-state characteristic can be achieved upon organic solvent processing.The visual monitoring with the luminescence change covered the whole solution-to-film transition,as well as the in situ photoprocessing of the solid-state materials.

关 键 词：EXCITATION AGGREGATION NONEQUILIBRIUM 

分 类 号：O62[理学—有机化学]