A new optical sensor for Al3+/Fe3+ based on PET and chelation-enhanced fluorescence

被引：17
|
作者：
Gao, Meiling [1 ]
Xie, Puhui [2 ]
Wang, Lingyu [1 ]
Miao, Xiaohui [1 ]
Guo, Fengqi [1 ]
机构：
[1] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Peoples R China
[2] Henan Agr Univ, Coll Sci, Zhengzhou 450002, Peoples R China
来源：
RESEARCH ON CHEMICAL INTERMEDIATES | 2015年 / 41卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Fluorescent probe; Ratiometric; PET; Chelation-enhanced fluorescence; Al(III); LARGE STOKES SHIFT; SELECTIVE DETECTION; AQUEOUS-MEDIA; MOLECULAR PROBE; TRIVALENT IONS; AL3+; FE3+; CHEMOSENSOR; ALUMINUM; AL(III);
D O I：
10.1007/s11164-015-1956-y
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A simple probe (compound 1) sensing Al3+ or Fe3+ by suppression of photoinduced electron/energy transfer (PET) process and chelation-enhanced fluorescence is described. Compound 1 was prepared from 2-(bromomethyl)benzo[d]thiazole and pyridine-2,6-diamine. Compound 1 showed a much stronger fluorescence response to Al(III) than to Fe(III). The best fluorescence response of 1 to Al3+ was found to be at pH near 7. The results indicated that 1 could be a promising fluorescent turn-on chemosensor for Al3+ or Fe3+. Ratiometric sensing of 1 to Al3+ or Fe3+ was accomplished by plotting the absorbance ratio at 338 to 310 nm versus Al3+ or Fe3+ concentration. The fluorescent turn-on response of 1 to Al3+ or Fe3+ can be attributed to suppression of PET process and chelation-enhanced fluorescence upon binding with Al3+ or Fe3+. The binding mode of 1-Al3+ or 1-Fe3+ was found to be a 1:1 complex based on Job's plot, electrospray ionization (ESI) mass spectroscopy (MS) data, and density functional theory (DFT) calculation results.
引用
收藏
页码：9673 / 9685
页数：13
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