Jie Fu

Anhui Normal University, Wu-hu-shih, Anhui Sheng, China

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Publications (10)26.33 Total impact

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    ABSTRACT: Based on the fluorescence quenching of Terbium (III)-sodium hexametaphosphate (Tb/SHMP) chelates in the presence chromate (III), a sensitive fluorimetric method was developed for the determination of trace amounts of chromium (III) in aqueous solutions. Under the optimum conditions, the linear calibration graph was obtained (R = 0.996). The linear range and detection limit of Cr (III) were 7.69 × 10(-7) to 1.15 × 10(-4) mol L(-1) and 4.50 × 10(-7) mol L(-1), respectively. The proposed method had a wider linear range and was proved to be very sensitive, rapid and simple. The method was applied successfully to the determination of chromium (III) in the synthetic samples and real water samples. Moreover, the reaction mechanism was discussed through the fluorescence lifetime and proved to be dynamic quenching behavior.
    Luminescence 11/2011; 26(6):434-8. · 1.27 Impact Factor
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    ABSTRACT: An efficient luminescence energy transfer (LET) system based on terbium(III)-sodium hexametaphosphate (Tb/SHMP) chelates as donor and 4-((4-(2-aminoethylamino)naphthalen-1-yl)diazenyl)benzenesulfonic acid dihydrochloride (ANDBS) as acceptor was developed for sensitive determination of trace nitrite. Stable and strong fluorescence Tb/SHMP chelates were prepared in aqueous solution. Based on Griess Reaction, ANDBS was generated by the quantitative reaction of nitrite, sulfanilamide and N-(1-naphtyl)-ethylenediamine dihydrochloride (N1NED). The degree of the overlap was effective for LET between the emission spectrum of Tb/SHMP chelates and the absorption spectrum of ANDBS. Based on the luminescence intensity quenching of Tb/SHMP chelates in proportion to the trace amounts of nitrite, a new assay for the selective and sensitive determination of nitrite was developed. Under the optimum conditions, the linear calibration graph was obtained with a linear range of 0.00040–0.20μgmL−1 (R=0.99657). The detection limit of NO2− was 0.00010μgmL−1 (R=0.99657). The method was applied successfully to the determination of nitrite for synthetic samples.
    Journal of Luminescence 01/2011; 131(1):83-87. · 2.14 Impact Factor
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    ABSTRACT: With the biomolecule glutathione (GSH) as a capping ligand, Eu(3+)-doped cadmium sulfide composite nanoparticles were successfully synthesized through a straightforward one-pot process. An efficient fluorescence energy transfer system with CdS nanoparticles as energy donor and Eu(3+) ions as energy accepter was developed. As a result of specific interaction, the fluorescence intensity of Eu(3+)-doped CdS nanoparticles is obviously reduced in the presence of Hg(2+). Moreover, the long fluorescent lifetime and large Stoke's shift of europium complex permit sensitive fluorescence detection. Under the optimal conditions, the fluorescence intensity of Eu(3+) at 614 nm decreased linearly with the concentration of Hg(2+) ranging from 10 nmol L(-1) to 1500 nmol L(-1), the limit of detection for Hg(2+) was 0.25 nmol L(-1). In addition to high stability and reproducibility, the composite nanoparticles show a unique selectivity towards Hg(2+) ion with respect to common coexisting cations. Moreover, the developed method was applied to the detection of trace Hg(2+) in aqueous solutions. The probable mechanism of reaction between Eu(3+)-doped CdS composite nanoparticles and Hg(2+) was also discussed.
    Talanta 11/2010; 83(1):139-44. · 3.50 Impact Factor
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    ABSTRACT: A fluorescent probe for mercury(II) ions, based on the quenching of fluorescence of terbium(III) ions doped in CdS nanoparticles, has been developed. The terbium(III)-doped cadmium sulfide composite nanoparticles were successfully synthesized through a straightforward one-pot process, with the biomolecule glutathione (GSH) as a capping ligand. In addition, the terbium(III) ions were observed an enhancement of emission intensity, owing to fluorescence energy transfer from the excited CdS particles to the emitting terbium(III). Because of a specific interaction, the fluorescence intensity of terbium(III)-doped CdS particles is obviously reduced in the presence of mercury(II) ions. The fluorescence quenching phenomenon of terbium(III) can be attributed to the fact that the energy transfer system was destroyed by combining with mercury(II). Under the optimal conditions, the fluorescent intensity of terbium(III) ions at 491nm decreased linearly with the concentration of mercury(II) ions ranging from 4.5nmolL(-1) to 550nmolL(-1). The limit of detection for mercury(II) was 0.1nmolL(-1). This method is simple, practical, relatively free of interference from coexisting substances and can be successfully applied to the determination of mercury(II) ions in real water samples. In addition, the probable mechanism of reaction between terbium(III)-doped CdS composite nanoparticles and mercury(II) was also discussed.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 10/2010; 77(3):625-9. · 1.98 Impact Factor
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    ABSTRACT: The sensitized fluorescence intensity of the terbium (III) ion can be notably enhanced in the presence of sodium hexametaphosphate (SHMP). Based on this, water-soluble Tb-SHMP chelate complexes were synthesized in aqueous solutions, and characterized by spectrofluorometry. 6-Mercapto-5-triazole[4,3-b]-S-tetrazine was generated by the quantitative reaction of HCHO with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole under alkaline conditions at room temperature. The spectral overlap between the emission of Tb-SHMP chelate complexes and absorption of 6-mercapto-5-triazole[4,3-b]-S-tetrazine meets the prerequisite for fluorescence energy transfer. Based on this, a novel efficient fluorescence energy transfer system between Tb-SHMP chelate complexes as donor and 6-mercapto-5-triazole[4,3-b]-S-tetrazine as acceptor was developed for the determination of HCHO in aqueous solutions. Under the optimal experimental conditions, this method is capable of detecting HCHO concentrations from 2.06×10(-5) to 6.18×10(-3) mg mL(-1) and the limit of detection was 7.11×10(-6) mg mL(-1). Compared with other general methods for the determination of HCHO, the proposed method improved the sensitivity and selectivity. Moreover, the proposed method was successfully applied to the determination of HCHO in water samples.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 10/2010; 78(1):371-4. · 1.98 Impact Factor
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    ABSTRACT: An efficient fluorescence energy transfer (FET) system between CePO(4):Tb(3+) nanocrystals as donor and 6-mercapto-5-triazole[4,3-b]-S-tetrazine as acceptor was built. CePO(4):Tb(3+) nanocrystals were synthesized in aqueous solutions, and characterized by transmission electron microscopy, electron diffraction pattern spectroscopy and spectrofluorometry. Under alkaline conditions, 6-mercapto-5-triazole[4,3-b]-S-tetrazine was generated by redox reaction of formaldehyde (HCHO) with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) at room temperature. The degree of the overlap was effective for FET between the emission spectrum of CePO(4):Tb(3+) and the absorption spectrum of 6-mercapto-5-triazole[4,3-b]-S-tetrazine. Based on this system, a simple and sensitive fluorescence method for the selective determination of formaldehyde in aqueous solutions was developed. Under optimal conditions, the quenched fluorescence intensity increased linearly with the concentration of HCHO ranging from 1.03 x 10(-9) to 1.03 x 10(-5) mg mL(-1) with a correlation coefficient of 0.9976. The limit of detection was 1.65 x 10(-10) mg mL(-1). Compared with several methods, the proposed method had a wider linear range, higher selectivity and sensitivity. Moreover, analytical application of the method was demonstrated by water samples.
    The Analyst 08/2010; 135(8):2139-43. · 4.23 Impact Factor
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    ABSTRACT: Glutathione (GSH)-capped CdS nanoparticles was successfully synthesized in aqueous solutions at room temperature. Based on the characteristics of synchronous fluorescence spectroscopy (SFS), a simple method with high sensitivity and selectivity was developed for determination of Hg(2+) with GSH-capped CdS nanoparticles as a fluorescence probe. The maximum synchronous fluorescence is located at 335 nm, scanning with excitation and emission wavelengths of 260 and 440 nm (Delta lambda=lambda(em)-lambda(ex)=180 nm), respectively. Under optimal conditions, the quenched fluorescence intensity increased linearly with the concentration of Hg(2+) ranging from 0.15 x 10(-7) to 125 x 10(-7) mol L(-1). The limit of detection was 4.5 x 10(-9) mol L(-1). Compared with several fluorescence methods, the proposed method exhibited several merits in terms of its linear range and the sensitivity. The quenching mechanism was also discussed. Moreover, analytical application of the method was demonstrated by water samples.
    Talanta 04/2010; 81(1-2):438-43. · 3.50 Impact Factor
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    ABSTRACT: One-step aqueous synthesis of CdS nanoparticles as a novel fluorescence probe for sensitive and selective determination of DNA with synchronous fluorescence spectrometric method has been developed. Different from the traditional organometallic route, in which toxic precursors or solvents might be used, the wet chemical approach demonstrated in this paper is superior in terms of simplicity, using of nontoxic materials, mild synthetic condition and good reproducibility. When Δλ=255nm, maximum synchronous fluorescence is produced at 264nm, the synchronous fluorescence intensity of the composite nanoparticles is significantly decreased in the presence of trace DNA at PH 0.91. Under optimal conditions, the linear ranges of the calibration curves are 0.08–30.0μgmL−1 for ctDNA and 0.05–35.0μgmL−1 for hsDNA, respectively. The detection limits are 1.5ngmL−1 for ctDNA and 2.2ngmL−1 for hsDNA, respectively. Furthermore, the method is successfully applied to the quantification of DNA in synthetic samples. The results show that this proposed method is stable, sensitive and practical for the determination of trace DNA.
    Journal of Luminescence 01/2010; 130(5):845-850. · 2.14 Impact Factor
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    ABSTRACT: A novel chemiluminescence method for the determination of 6-mercaptopurine was established based on 6-mercaptopurine inhibition of the chemiluminescence emission of potassium permanganate-thioacetamide-sodium hexametaphosphate system. The peak height was proportional to log 6-mercaptopurine concentration in the range 7.0 × 10(-10) to 1.0 × 10(-7)  g/mL and the detection limit was 1.9 × 10(-11)  g/mL (S/N = 3). The relative standard deviation was 1.5% for the determination of 8.0 × 10(-8)  g/mL 6-mercaptopurine (n = 11). The proposed sensor was successfully applied to the analysis of 6-mercaptopurine in human serum samples.
    Luminescence 09/2009; 25(6):431-5. · 1.27 Impact Factor
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    ABSTRACT: Based on the characteristics of synchronous fluorescence spectroscopy (SFS), a new method with high sensitivity and selectivity was developed for rapid determination of silver ion with functional cadmium sulphide (CdS) nanoparticles as a fluorescence probe. When Delta lambda (lambda(em) - lambda(ex)) = 215 nm, maximum synchronous fluorescence is produced at 304 nm. Under optimal conditions, functional cadmium sulphide displayed a calibration response for silver ion over a wide concentration range from 0.8x10(-10) to 1.5x10(-8) mol L(-1). The limit of detection was 0.4x10(-10) mol L(-1) and the relative standard deviation of seven replicate measurements for the lowest concentration (0.8x10(-10) mol L(-1)) was 2.8%. Compared with several fluorescence methods, the proposed method had a wider linear range and improved the sensitivity. Furthermore, the concentration dependence of the synchronous fluorescence intensity is effectively described by a Langmuir-type binding isotherm.
    Analytica chimica acta 07/2008; 616(2):170-6. · 4.31 Impact Factor