A novel europium-sensitive fluorescent nano-chemosensor based on new functionalized magnetic core-shell Fe3O4@SiO2 nanoparticles

被引：15

作者：

Ganjali, Mohammad Reza ^{[1
]}

Hosseini, Morteza ^{[2
]}

Khobi, Mehdi ^{[3
]}

Farahani, Shima ^{[1
]}

Shaban, Masoom ^{[1
]}

Faridbod, Farnoush ^{[1
]}

Shafiee, Abbas ^{[3
]}

Norouzi, Parviz ^{[1
]}

机构：

[1] Univ Tehran, Ctr Excellence Electrochem, Fac Chem, Tehran, Iran

[2] Univ Tehran, Dept Life Sci Engn, Fac New Sci & Technol, Tehran, Iran

[3] Univ Tehran Med Sci, Dept Med Chem, Fac Pharm & Pharmaceut Sci, Res Ctr, Tehran, Iran

来源：

TALANTA | 2013年 / 115卷

关键词：

Nano-chemosensor; Fluorescence; Magnetic core-shell silica nanoparticles; Europium; SPECTROPHOTOMETRIC DETERMINATION; QUANTITATIVE-DETERMINATION; LANTHANIDE IONS; SENSOR; LUMINESCENCE; RECOGNITION; DESIGN; BLOOD;

D O I：

10.1016/j.talanta.2013.04.010

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel Eu3+-sensitive fluorescent chemosensor is introduced. It is based on magnetic core-shell silica nanoparticle which is functionalized by Cinchonidine (CD-Fe3O4@SiO2). The nano-chemosensor was synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), scanning electron microscopy (SEM), UV-visible absorption and fluorescence emission. The fluorescent nano-chemosensor shows a selective interaction with Eu3+ ion. Fluorescence studies revealed that the emission intensity of the functionalized magnetic core-shell silica nanoparticles (CD-Fe3O4@SiO2 NPs) increases significantly by addition of various concentrations of Eu3+ ion. While in case of mono, di, and other trivalent cations, weak changes or either no changes in intensity were observed. The enhancement in fluorescence intensity of nano-chemosensor is because of the strong covalent binding of Eu3+ ion to CD-Fe3O4@SiO2 NPs with a large binding constant value of 1.7 x 10(5) mol L-1. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：271 / 276

页数：6

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