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 lumines-cent 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 TPPA+R6G@NKU-110.This 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.

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

School of Materials Science and Engineering,Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry,Nankai University,Tianjin 300350,China;State Key Laboratory of Elemento-Organic Chemistry,College of Chemistry,Nankai University,Tianjin 300071,China

中国化学（英文版）

[1]Yan-Yuan Jia;Jia-Cheng Yin;Na Li;Ying-Hui Zhang;Rui Feng;Zhao-Quan Yao;Xian-He Bu-.Crystalline-State Solvent:Metal-Organic Frameworks as a Platform for Intercepting Aggregation-Caused Quenching)[J].中国化学（英文版）,2022(05):589-596

Intercepting,OLMs,Pyronin,TPPA+R6G

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