Journal
CHEMISTRYSELECT
Volume 5, Issue 34, Pages 10632-10636Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202002232
Keywords
COFs; Covalent organic frameworks; Fluorescence detection; Squaric acid; ST-COF-1
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Funding
- National Natural Science Foundation of China [21765013]
- Natural Science Foundation of Gansu Province [18JR3RA220]
- 2018 Gansu Provincial Youth Science and Technology Talents Lifting Project of Gansu Provincial Science and Technology Association of China [2018-135]
- Doctoral Research Start-up Fund of Lanzhou City University [LZCU-BS2019-22]
- Provincical Key Laboratory of Gansu Higher Education for City Enviromental Pollution Control
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A new triazinyl-based covalent organic frameworks(COFs) linked by squaraine(ST-COF-1) was synthesized via condensation of squaric acid (SA) and 1,3,5-triazine-2,4,6-triamine (Melamine, MA). The BET surface area of ST-COF-1 was calculated as 484.12 m(2) g(-1). The suspension of this material will emit strong blue fluorescence under the irradiation of 365 nm ultraviolet lamp. Strong quenching effects of Fe(3+)on the fluorescence of the COFs allowed selective chemosensing for Fe(3+)cation. In addition, some nitro aromatic compounds also cause strong fluorescence quenching, which proves that this material can also be used for the qualitative detection of nitro aromatic compounds.
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