期刊
LUMINESCENCE
卷 33, 期 1, 页码 54-63出版社
WILEY
DOI: 10.1002/bio.3372
关键词
aluminium; fluorescence probe; naphthalimide; recognition; Schiff base
资金
- Foundation of A Hundred Youth Talents Training Program of Lanzhou Jiaotong University
- Natural Science Foundation of Gansu Province [1212RJZA037]
- National Natural Science Foundation of China [21367017]
A new fluorescent Al3+-probe, N-allyl-4-[3,3'-((2-aminoethyl)azanediyl)-bis(N'-(2-hydroxybenzylidene)propanehy-drazide)]-1,8-naphthalimide (L), was designed and synthesized based on 1,8-naphthalimide. The probe L contains 1,8-naphthalimide moiety as the fluorophore and a Schiff base as the recognition group. The structure of L was determined by single crystal X-ray. L emission at 526 nm increased on addition of Al3+ under excitation wavelength at 350 nm. L exhibited high selectivity and sensitivity fluorescence emission towards to Al3+ in ethanol/Tris-HCl buffer solution (1:1, v/v, pH = 7.2) as compared with other tested metal ions. A good linearity with a correlation coefficient (R-2) of 0.99 was observed in the concentration range 2-10 M. The binding constant and the detection limit of L for Al3+ were calculated to 2.6 x 10(4) M-1 and 0.34 M, respectively. The results of experiments that including Job plot, ultraviolet-visible (UV-Vis) light titration, fluorescence titration, ESI-MS and H-1 NMR titration, indicated a 1:1 stoichiometric complex between L and Al3+. L was highly effective in monitoring Al3+ in real-life Yellow River and tap water samples.
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