Synergism of Light-Induced[4+4]Cycloaddition and Electron Transfer Toward Switchable Photoluminescence and Single-Molecule Magnet Behavior in a Dy_(4) Cubane  

作　　者：Yu-Han Wang Zhen-Ni Gao Shuai Liang Jie Li Wu-Ji Wei Song-De Han Yi-Quan Zhang Ji-Xiang Hu Guo-Ming Wang 

机构地区：[1]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China [2]Jiangsu Key Laboratory for NSLSCS,School of Physical Science and Technology,Nanjing Normal University,Nanjing 210023,China

出　　处：《Research》2025年第1期581-592,共12页研究(英文)

基　　金：supported by the National Natural Science Foundation of China(22171155,22071126,and 21973046);Natural Science Foundation of Shandong Province(ZR2022YQ07);Taishan Scholar Program(tsqn202306166);Qingdao University discipline cluster interdisciplinary joint research project(FZ2024201)。

摘　　要：Molecular materials possessing switchable magneto-optical properties are of great interest due to their potential applications in spintronics and molecular devices.However,switching their photoluminescence(PL)and single-molecule magnet(SMM)behavior via light-induced structural changes still constitutes a formidable challenge.Here,a series of cubane structures were synthesized via self-assembly of 9-anthracene carboxylic acid(HAC)and rare-earth ions.All complexes exhibited obvious photochromic phenomena and complete PL quenching upon Xe lamp irradiation,which were realized via the synergistic effect of photogenerated radicals and[4+4]photocycloaddition of the AC components.The quenched PL showed the largest fluorescence intensity change(99.72%)in electron-transfer photochromic materials.A reversible decoloration process was realized via mechanical grinding,which is unexpectedly in the electron-transfer photochromic materials.Importantly,an SMM behavior of the Dy analog was observed after room-temperature irradiation due to the photocycloaddition of AC ligands and the photogenerated stable radicals changed the electrostatic ligand field and magnetic coupling.Moreover,based on the remarkably photochromic and photoluminescent properties of these compounds,2 demos were applied to support their application in information anti-counterfeiting and inkless printing.This work,for the first time utilizing the simultaneous modulation of photocycloaddition and photogenerated radicals in one system,realizes complete PL quenching and light-induced SMM behavior,providing a dynamical switch for the construction of multifunctional polymorphic materials with optical response and optical storage devices.

关 键 词：light induced cycloaddition photochromic phenomena molecular deviceshoweverswitching switchable photoluminescence electron transfer single molecule magnet cubane structures molecular materials 

分 类 号：O641[理学—物理化学]