Achieving gas pressure-dependent luminescence from an AIEgen-based metal-organic framework

Zhijia Li, Feilong Jiang, Muxin Yu, Shengchang Li, Lian Chen () and Maochun Hong ()
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Zhijia Li: Chinese Academy of Sciences
Feilong Jiang: Chinese Academy of Sciences
Muxin Yu: Chinese Academy of Sciences
Shengchang Li: Chinese Academy of Sciences
Lian Chen: Chinese Academy of Sciences
Maochun Hong: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Materials exhibiting aggregation-induced emission (AIE) behaviour enable strong emission in solid state and can respond to various external stimuli, which may facilitate the development of materials for optical sensing, bioimaging or optoelectronic devices. Herein, we use an AIE luminogen 2’,5’-diphenyl-[1,1’:4’,1”-terphenyl]-4,4”-dicarboxylic acid as the ligand to prepare an AIEgen-based MOF (metal-organic framework) named FJI-H31. FJI-H31 exhibits bright luminescence under ambient conditions (under air and at room temperature), but almost no emission is observed under vacuum. Our investigation shows that the emission intensity displays a smooth and reversible enhancement with increased gas pressure, which may be attributed to the restriction of intramolecular motion brought by structural deformation under pressure stimulus. Unlike most pressure-responsive MOFs, the luminescence reverts to its original state once gas pressure recovers. By virtue of its unique optical properties, a luminescent MOF with sensing ability of gas-pressure is realized.

Date: 2022
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DOI: 10.1038/s41467-022-29737-z

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