Journal
CHINESE CHEMICAL LETTERS
Volume 33, Issue 9, Pages 4317-4320Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2022.01.009
Keywords
Hydrogen-bonded organic frameworks (HOFs); Charge-assisted hydrogen bonding; Fluorescence amplification; Aniline detection; Low detection limit
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Funding
- National Natural Science Foundation of China [21673039, 21573042, 21805039, 21975044, 21971038, 21922810]
- Fujian Provincial Department of Education [JAT200 077]
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This study reports a hydrogen-bonded organic framework (HOF) material FJU-360 constructed from disodium 6-hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonate (SSY) and terephthalimidamide. FJU-360 exhibits stronger fluorescence than SSY and can be used as a luminescence sensor for the rapid detection of aniline. The detection limit of FJU-360 for aniline reached 3.2 nmol/L, which is the lowest reported value.
Although the construction of specific functional crystalline materials is still challenging, the multi-component molecular assembly has become a key solution for the design of functional materials. Here, we report a hydrogen-bonded organic framework (HOF) material FJU-360 constructed from disodium 6-hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonate (SSY) and terephthalimidamide. The charge-assisted hydrogen bonding between amidinium and sulfonate makes FJU-360 produce much stronger fluorescence than SSY, and can be used as a luminescence sensor to rapidly quench aniline through luminescence quenching. FJU-360 is sensitive and highly selective for the detection of aniline, and the detection limit reached 3.2 nmol/L, which is the lowest value reported currently. The mechanism of aniline response was analyzed through the aniline@FJU-360 single crystal structure, and the luminescence mechanism was clarified through density function theory calculations. This work is an important step towards the rational synthesis and assembly of sensing materials. (C) 2022 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
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