A novel europium-sensitive fluorescent nano-chemosensor based on new functionalized magnetic core–shell Fe3O4@SiO2 nanoparticles Academic Article uri icon

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  • A novel Eu(3+)-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 Eu(3+) 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 Eu(3+) 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 Eu(3+) ion to CD-Fe3O4@SiO2 NPs with a large binding constant value of 1.7 × 10(5) mol L(-1).


  • Ganjali, Mohammad Reza
  • Hosseini, Morteza
  • Khobi, Mehdi
  • Farahani, Shima
  • Shaban, Masoom
  • Faridbod, Farnoush
  • Shafiee, Abbas
  • Norouzi, Parviz

publication date

  • October 2013