Xiaoxuan Yue, Chao-rui Li, Zheng-yin Yang
Aug 1, 2017
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0
Influential Citations
26
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract A novel Schiff-base, 7-acetamino-4-methyl-1,8-naphthyridine-2-carbaldehyde-(1′,8′-naphthalenedicarbonyl) hydrazone ( HL ) was designed, synthesized and evaluated as a fluorescent probe. The fluorescence properties of this probe towards various metal ions were investigated by UV–vis and fluorescence spectra in methanol. Test results indicated that the probe had high selectivity towards Al 3+ over other commonly coexisting metal ions. Upon addition of Al 3+ , the fluorescence intensity at 414 nm increased significantly due to the inhibition of the PET process. The binding constant (Ka) of Al 3+ binding to HL was calculated to be 5.64 × 10 4 M −1 from a Benesi-Hildebrand plot, and the detection limit (LOD) of HL for sensing Al 3+ was calculated to be 0.13 μM. The binding stoichiometry between HL and Al 3+ was determined as 1:1 by the Job’s plot. Furthermore, the probe was chemically reversible for Al 3+ in methanol by the addition of Na 2 EDTA solution.