Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7682096 | Talanta | 2013 | 28 Pages |
Abstract
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 1.7Ã105 mol Lâ1.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Mohammad Reza Ganjali, Morteza Hosseini, Mehdi Khobi, Shima Farahani, Masoom Shaban, Farnoush Faridbod, Abbas Shafiee, Parviz Norouzi,