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Molecules 2016, 21(8), 1066; doi:10.3390/molecules21081066

Magnetic, Fluorescence and Transition Metal Ion Response Properties of 2,6-Diaminopyridine Modified Silica-Coated Fe3O4 Nanoparticles

1
Department of Chemistry and Chemical Engineering, Xi’an University, Xi’an 710065, China
2
Department of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 23 June 2016 / Revised: 10 August 2016 / Accepted: 10 August 2016 / Published: 15 August 2016
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Abstract

Multi-functional nanoparticles possessing magnetic, fluorescence and transition metal ion response properties were prepared and characterized. The particles have a core/shell structure that consists of silica-coated magnetic Fe3O4 and 2,6-diaminopyridine anchored on the silica surface via organic linker molecules. The resultant nanoparticles were found by transmission electron microscopy to be well-dispersed spherical particles with an average diameter of 10–12 nm. X-ray diffraction analysis suggested the existence of Fe3O4 and silica in/on the particle. Fourier transform infrared spectra revealed that 2,6-diaminopyridine molecules were successfully covalently bonded to the surface of magnetic composite nanoparticles. The prepared particles possessed an emission peak at 364 nm with an excitation wavelength of 307 nm and have a strong reversible response property for some transition metal ions such as Cu2+ and Zn2+. This new material holds considerable promise in selective magneto separation and optical determination applications. View Full-Text
Keywords: multi-functional nanoparticles; magnetic; fluorescence; metal ions response multi-functional nanoparticles; magnetic; fluorescence; metal ions response
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Zhai, Y.; Song, R.; Zhang, C.; He, Q.; Han, Q.; Qu, Y. Magnetic, Fluorescence and Transition Metal Ion Response Properties of 2,6-Diaminopyridine Modified Silica-Coated Fe3O4 Nanoparticles. Molecules 2016, 21, 1066.

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