期刊
INORGANICA CHIMICA ACTA
卷 464, 期 -, 页码 167-171出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2017.05.032
关键词
Fluorescent probe; 1,8-Naphthyridine; Naphthalimide; Aluminum ion; Photo-induced electron transfer; Reversibility
资金
- National Natural Science Foundation of China [81171337]
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 Al3+ over other commonly coexisting metal ions. Upon addition of Al3+, the fluorescence intensity at 414 nm increased significantly due to the inhibition of the PET process. The binding constant (Ma) of Al3+ binding to HL was calculated to be 5.64 x 10(4) M-1 from a Benesi-Hildebrand plot, and the detection limit(LOD) of HL for sensing Al3+ was calculated to be 0.13 mu M. The binding stoichiometry between HL and Al3+ was determined as 1:1 by the Job's plot. Furthermore, the probe was chemically reversible for Al3+ in methanol by the addition of Na(2)EDTA solution. (C) 2017 Published by Elsevier B.V.
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