Crystalline-State Solvent:Metal-Organic Frameworks as a Platform for Intercepting Aggregation-Caused Quenching  

作　　者：Yan-Yuan Jia Jia-Cheng Yin Na Li Ying-Hui Zhang Rui Feng Zhao-Quan Yao Xian-He Bu 

机构地区：[1]School of Materials Science and Engineering,Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry,Nankai University,Tianjin,300350 China [2]State Key Laboratory of Elemento-Organic Chemistry,College of Chemistry,Nankai University,Tianjin,300071 China

出　　处：《Chinese Journal of Chemistry》2022年第5期589-596,共8页中国化学（英文版）

基　　金：This work was supported by NSFC(Nos.21531005,91856124,and 21905142);the Programme of Introducing Talents of Dis-[9]cipline to Universities(B18030).

摘　　要：The sequestration of organic luminescent molecules(OLMs)within cage-based metal-organic frameworks(MOFs)as a dispersion platform has been developed to impede aggregation-caused quenching(ACQ).The homogenous encapsulation of distinct luminescent guests of different sizes and emissive behaviors in the cage structure of a MOF resulted in high fluorescent quantum yields of 44.8%for DAPI@NKU-110(DAPI=4',6-diamidino-2-phenylindole),65.4%for TPPA@NKU-110(TPPA=tris(4-(pyridin-4-yl)phenyl)amine),31.3%for R6G@NKU-110(R6G=Rhodamine 6G),and 58.3%for PY@NKU-110(PY=Pyronin Y),attributable to the confinement effect caused by the rigid cages of NKU-110.More significantly,a positive correlation of the encapsulated quantity of OLMs with their concentration in the in-situ solvothermal reaction was unveiled by spectral analysis and utilized to facilely fabricate a white-light-emitting crystal material [e-mail] material features a large crystal size on the millimeter-scale,broadband white emission,ideal CIE coordinates(0.33,0.34),and a high quantum yield(49.1%)when excited at 365 nm.Moreover,such a strategy can be easily generalized to an abundance of other cage-based MOFs and a plentiful volume of OLMs for the future development of colorful,high performance luminescent materials.

关 键 词：Metal-organic frameworks Cage compounds Fluorescence Color tunability In-situ encapsulation 

分 类 号：O62[理学—有机化学]