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Solvent-dependent selective fluorescence sensing of Al3+ and Zn2+ using a single Schiff base
被引:49
|作者:
Kim, Dong Ha
[1
]
Im, Ye Seo
[1
]
Kim, Hyun
[2
,3
]
Kim, Cheal
[1
,2
,3
]
机构:
[1] Seoul Natl Univ Sci & Technol, Nowon Inst Educ Gifted Seoultech, Seoul 139743, South Korea
[2] Seoul Natl Univ Sci & Technol, Dept Fine Chem, Seoul 139743, South Korea
[3] Seoul Natl Univ Sci & Technol, Dept Interdisciplinary Bio IT Mat, Seoul 139743, South Korea
基金:
新加坡国家研究基金会;
关键词:
Al3+;
Zn2+;
Schiff base;
Fluorescent chemosensor;
C=N isomerization;
NAKED EYE DETECTION;
ALUMINUM IONS;
TURN-ON;
SENSOR;
CHEMOSENSOR;
CADMIUM;
MOIETY;
ZINC;
D O I:
10.1016/j.inoche.2014.03.036
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
The selective assay of Al3+ and Zn3+ ions is reported using fluorescence enhancement of a simple Schiff base receptor 1 (1 = 1-((E)-(1,3-dihydroxy-2-(hydroxymethyl)propan-2-ylimino)methyl)naphthalen-2-ol) in aqueous solvents. The Schiff base receptor 1 showed a turn-on fluorescence in the presence of Al3+ in a mixture of methanol-water, as a result of a restricted C=N isomerization mechanism. The ion selectivity of 1 could be switched for Zn2+ by swapping the solvent from methanol-water to DMF-water mixture. In particular, this chemosensor could clearly distinguish Zn2+ from Cd2+. The binding properties of 1 with the metal ions were investigated by UV-vis, fluorescence, electrospray ionization mass spectroscopy and H-1 NMR titration. (C) 2014 Elsevier B.V. All rights reserved.
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页码:15 / 19
页数:5
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