Title
‘Turn-on’ fluorescent chemosensors based on naphthaldehyde-2-pyridinehydrazone compounds for the detection of zinc ion in water at neutral pH
Author
Yuanyuan Liu, Yuanyuan Li, Qi Feng, Na Li, Kai Li, Hongwei Hou, Bing Zhang
Year
2017
Journal
Luminescence
Abstract
A series of naphthaldehyde-2-pyridinehydrazone derivatives were discovered to display interesting ‘turn-on’ fluorescence response to Zn2+ in 99% water/DMSO (v/v) at pH 7.0. Mechanism study indicated that different substituent groups in the naphthaldehyde moiety exhibited significant influence on the detection of Zn2+. The electron rich group resulted in longer fluorescence wavelengths but smaller fluorescence enhancement for Zn2+. Among these compounds, 1 showed the highest fluorescence enhancement of 19-fold with the lowest detection limit of 0.17 μmol/L toward Zn2+. The corresponding linear range was at least from 0.6 to 6.0 μmol/L. Significantly, 1 showed an excellent selectivity toward Zn2+ over other metal ions including Cd2+.
Instrument
FP-8300
Keywords
Fluorescence, Ligand binding, Chemical stability, Sensors, Optical properties, Materials