期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 37, 页码 13023-13027出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201602974
关键词
fluorescence; metal-organic frameworks; fluorescent probes; ratiometric luminescence
资金
- NSFC [21401086, 21401087]
- Natural Science Foundation of Jiangsu Province [BK20140234]
- PAPD
- TAPP of Jiangsu Higher Education Institutions
A heteroatom-rich 3D noninterpenetrating metal-organic framework (MOF) Cd-EDDA constructed from an ethylene glycol ether bridging tetracarboxylate ligand H4EDDA (5,5'-(ethane-1,2-diylbis(oxy))diisophthalic acid) shows good chemical resistance to both acidic and alkaline solutions with a pH ranging from 2.0 to 12.2. There is a corresponding ratiometric luminescence response to pH from 2.0 to 11.5, and the sensing mechanism is also discussed through ion chromatography and molecular force field-based calculations. Importantly, the probe can easily be regenerated simply by modulating the pH of the solution, thus being the first example of a regenerable MOF-based ratiometric luminescent probe for pH.
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