期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 28, 页码 10547-10552出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c04810
关键词
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资金
- Shenzhen Polytechnic
- Guangdong Basic and Applied Basic Research Foundation [2020A1515110420]
- Shenzhen Science and Technology Program [RCBS20200714114941230]
By utilizing linker engineering and a mixed-linker strategy, the emission behavior of UiO-68 type metal-organic frameworks can be systematically tuned, leading to significantly enhanced quantum yield and increased lifetime.
Luminescent metal-organic frameworks (LMOFs) demonstrate strong potential for a broad range of applications due to their tunable compositions and structures. However, the methodical control of the LMOF emission properties remains a great challenge. Herein, we show that linker engineering is a powerful method for systematically tuning the emission behavior of UiO-68 type metal-organic frameworks (MOFs) to achieve full-color emission, using 2,1,3-benzothiadiazole and its derivative-based dicarboxylic acids as luminescent linkers. To address the fluorescence self-quenching issue caused by densely packed linkers in some of the resultant UiO-68 type MOF structures, we apply a mixed-linker strategy by introducing nonfluorescent linkers to diminish the self-quenching effect. Steady-state and time-resolved photoluminescence (PL) experiments reveal that aggregation-caused quenching can indeed be effectively reduced as a result of decreasing the concentration of emissive linkers, thereby leading to significantly enhanced quantum yield and increased lifetime.
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