期刊
SCIENCE CHINA-CHEMISTRY
卷 61, 期 11, 页码 1470-1474出版社
SCIENCE PRESS
DOI: 10.1007/s11426-018-9253-3
关键词
fluorescence; covalent organic frameworks; iron ion; fluorescent probe
资金
- National Basic Research Program of China [2015CB932001]
- National Natural Science Foundation of China [21775056, 21777074]
- Fundamental Research Funds for Central Universities [JUSRP51714B]
- Open Funds of the State Key Laboratory of Electroanalytical Chemistry [SKLEAC201705]
Covalent organic frameworks (COFs) have been widely applied in gas capture and separation, but the fluorescent property of COFs with large -conjugated system tends to be underexplored. Here we report the fluorescent properties of several COFs including TaTa, DhaTab, TRITER-1 and TzDa and the effect of metal ions of Na+, Mg2+, K+, Ca2+, Cu2+, Zn2+, Pb2+, Ag+, Cd2+ and Fe3+ on the fluorescence of these COFs. The results show that only Fe3+ significantly quenched the fluorescence of the studied COFs. The possibility of the four COFs for selective sensing of Fe3+ was demonstrated. The possible mechanism of the effect of Fe3+ on the fluorescence of the COFs was based on the absorption competition quenching.
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