A novel Schiff-base fluorescent probe based on 1,8-naphthyridine and naphthalimide for Al3+

作者：Yue, Xiao-li; Li, Chao-rui; Yang, Zheng-yin^*

来源：Inorganica Chimica Acta, 2017, 464: 167-171.

DOI：10.1016/j.ica.2017.05.032

• Fluorescent probe
• 1,8-Naphthyridine
• Naphthalimide
• Aluminum ion
• Photo-induced electron transfer
• Reversibility

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.

• 出版日期2017-8-1
• 单位功能有机分子化学国家重点实验室; 兰州大学