Journal
MATERIALS CHEMISTRY FRONTIERS
Volume 4, Issue 5, Pages 1500-1506Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9qm00759h
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Funding
- National Natural Science Foundation of China [21975054, 21602014]
- first-class discipline construction project in Guizhou Province-Public Health and Preventive Medicine [2017[85]]
- Guizhou Provincial Natural Science Foundation [[2019]2792, [2018]5779-14]
- EPSRC [EP/R023816/1]
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A non-planar tetraphenylethylene-functionalized salicylaldehyde Schiff-base fluorescent probe (TPE-An-Py) with aggregation-induced enhanced emission (AIEE) characteristics was synthesized via a classical Knoevenagel condensation reaction, and exhibited a high sensitivity towards copper ions in aqueous media with a turn-off fluorescence mechanism; the limit of detection is 2.36 x 10(-7) mol L-1. Importantly, the coordination mode of the probe towards copper was further evaluated by UV-vis and NMR spectroscopy and a 1 : 2 stoichiometry was identified. A single crystal X-ray diffraction study confirmed the binding mode. In addition, the AIEE fluorescent probe can be applied to the detection of Cu2+ in practical samples with satisfactory recoveries in a range of 106-111% in lake water and 97-108% in tap water.
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