研究目的
To synthesize novel organic-inorganic hybrid fluorescent microspheres (OI-FMs) without typical fluorophores and explore their applications as probes for Fe(III), Hg(II), and biothiols detection.
研究成果
OI-FMs-120 exhibits high fluorescence quantum yield and selective detection capabilities for Fe3+ in anhydrous ethanol and Hg2+ in aqueous solutions, with potential applications in environmental monitoring and biological sensing.
研究不足
The study is limited by the specificity of OI-FMs-120 to Fe3+ and Hg2+ in different solvents, and the need for optimization of experimental conditions for each application.
1：Experimental Design and Method Selection
The study utilized the St?ber method for synthesizing fluorescent silica microspheres, incorporating a fluorescent small molecule CA-AEAPMDS without typical fluorophores.
2：Sample Selection and Data Sources
Samples were prepared by heating OI-FMs at various temperatures to optimize fluorescence intensity. Real water samples (tap and river water) were used for practical application tests.
3：List of Experimental Equipment and Materials
Instruments included UV-vis spectrophotometer, fluorescence spectrometer, SEM, FTIR spectrometer, XPS, and TGA analyzer. Materials included citric acid, AEAPMDS, TEOS, and various solvents.
4：Experimental Procedures and Operational Workflow
OI-FMs were synthesized, heat-treated, and characterized. Fluorescence detection procedures for Hg2+ and Fe3+ were optimized for pH and incubation time. Biothiols detection was performed using the OI-FMs-120-Hg2+ system.
5：Data Analysis Methods
Fluorescence quenching and recovery data were analyzed using the Stern-Volmer equation. Detection limits were calculated based on linear regression analysis.
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UV2550 spectrophotometer
UV2550
Shimadzu
Determination of UV-vis spectra
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Fluoromax-4 fluorescence spectrometer
Fluoromax-4
Horiba
Capture of fluorescence spectra
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MercuryPlus-400 spectrometer
MercuryPlus-400
Measurement of nuclear magnetic resonance spectra
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LQC system
LQC
Finngan MAT
Gathering of mass spectra (ESI)
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QuadraSorb Station 2
QuadraSorb Station 2
Measurement of specific surface area and pore distribution by nitrogen adsorption-desorption isotherms
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SDTQ600 analyzer
SDTQ600
TA
Thermal gravimetric analysis (TGA)
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QUANTA FEG 250
QUANTA FEG 250
Characterization of microstructure and morphology by SEM
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NICOLET-iS50 spectrometer
NICOLET-iS50
Recording of Fourier transform infrared spectroscopy (FTIR) to characterize chemical groups
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ESCALAB 250XI
ESCALAB 250XI
XPS spectra measurements
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