| 光谱学与光谱分析 |
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| Fluorescence Property of a Chemical Probe for Naked-Eye and Detection of Fe3+ |
| SONG Yu-min, MA Xin-xian, YANG Wu |
| College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China |
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Abstract A higher selective and sensitive probe for the detection of Fe(Ⅲ) in aqueous media was made using 2,4-Diisocyanatotoluene (TDI) as a bridge to couple Fe3O4 nanoparticles(NPs) and Rhodamine-6G hydrazide. The characterization of composite materials with Infrared spectra(IR), Thermal Gravimetric analysis(TGA) and Transmission Emission Microscopy(TEM) points to the graft of Rhodamine-6G hydrazide onto the surface of the Fe3O4. The obvious color change of the probe solution from light grey to pink upon the addition of Fe3+ demonstrated the probe could be used for “naked-eye” detection of Fe3+ in water at pH 7. The presence of 1 equivalent (10μmol·L-1 μm) of each of these metal ions, including Mn2+, Ni2+, Y2+, Eu3+, Ce3+, La3+, Pr3+, Cd2+, Cr3+, Sm3+, Fe2+, Cu2+and Zn2+ ions, did not demonstrate any obvious fluorescence change of the probe water solution, which confirmed the probe was a probe with remarkable selectivity for Fe3+. And the fluorescence images of HeLa cells in physiological solutions after incubation with Fe3+ and then further incubated with the probe leading to a strong intracellular fluorescence, which suggested the probe could penetrate the HeLa cell membrane and could respond to Fe3+ in intracellular within living cells.
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Received: 2012-06-25
Accepted: 2012-08-20
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Corresponding Authors:
SONG Yu-min
E-mail: songym@nwnu.edu.cn
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