期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 265, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2021.120340
关键词
Metal-organic framework; Fluorescence sensor; Test paper; Fluorescent ink; Luminescent materials
类别
资金
- National Natural Science Foundation of China [21373178, 21663031]
- Yan'an High-level Talents Special Foundation [2019-33]
- Doctoral Scientific Research Startup Project of Yan'an University [YDBK2019-22]
- Scientific Research Program Project of Yan'an University [YDY2020-42]
A highly stable heterometallic MOF was synthesized, capable of detecting Aspartic acid and sensitizing Eu3+ fluorescence. Eu3+@CdK-MOF can serve as a fluorescence sensor and fluorescent ink, with hidden information that can be read repeatedly.
A highly stable heterometallic MOF, {[(Me2NH2)(2)]center dot[Cd2K2(L)(2)(H2O)]}(n) (H4L = terphenyl-2, 2', 4, 4'-tetracarboxylic acid) (1), was synthesized. 1 featuring one-dimensional channels can efficiently detect Aspartic acid with a low limit of detection (LOD) value (2.5 mu M). More interestingly, 1 can encapsulate Eu3+ and sensitize the visible-emitting characteristic fluorescence of Eu3+ in aqueous solution. Then, Eu3+@CdK-MOF is found to be an excellent fluorescence sensor for the detection of Ornidazole (ODZ) and the portable ODZ test paper is also successfully designed. Eu3+@CdK-MOF can also be used as fluorescent ink to write some words. The words can be hidden when treated with acid vapor and then the words can be restored when treated with alkaline vapor. More importantly, the hidden information can be read repeatedly. Therefore, this reversible light-emitting and reusable property have great potential for development in information encryption and decryption and information storage. (C) 2021 Elsevier B.V. All rights reserved.
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