期刊
TALANTA
卷 236, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2021.122877
关键词
Covalent organic frameworks; Post synthetic modification; Lanthanide hybrid luminescent materials; Fluorescent sensor
资金
- National Natural Science Foundation of China [21971194]
- Developing Science Funds of Tongji University
A covalent organic framework with remarkable luminescence properties, named TpDq, was synthesized and used as a fluorescent probe for detecting glutaraldehyde. The probe showed advantages of reusability, high pH stability, fast response time, and low detection limit.
A covalent organic framework (named as TpDq) linked by beta-ketoamine was prepared by imine condensation reaction with 1,3,5-triformylphloroglucinol (TFP) and 2,6-diaminoanthraquinone (DAAQ) as building blocks. Via employing a functionalized modification strategy, a new lanthanide complex Eu3+-beta-diketone functionalized covalent organic framework hybrid material, Eu-TTA@TpDq (TTA = 2-thenoyltrifluoroacetone), has been synthesized. After post-synthetic modification (PSM), the shape and structure of the parent framework is well preserved and the modified material shows remarkable luminescence properties. Based on this, we designed it as a fluorescent probe and tried to use it to sense common aldehydes. The results indicate that Eu-TTA@TpDq exhibits a turn-off response toward glutaraldehyde which can distinguish from other common aldehydes. The fluorescent probe has the advantages of reusability, pH stability (4.50-8.52), fast luminescence response (<1 min) and low detection limit. The linear range of this method was 0-100 mu M; the detection limit was 4.55 mu M; the relative standard deviation was 2.16%. Furthermore, it has broad application prospect in both practical sensing of glutaraldehyde in water environment and simple detection of glutaraldehyde vapor. In addition, we preliminarily discussed the possible sensing mechanism.
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