研究目的
To synthesize a MOF derived from 4,4’-bipyridyl in a simple and inexpensive way afterwards doping with Ln (Eu3+, Tb3+) and study their luminescent properties.
研究成果
The study successfully synthesized and doped Zn-MOF with Eu3+ and Tb3+, demonstrating efficient energy transfer from the MOF to the lanthanide ions. The doped complexes exhibited tunable emission colors and high quantum yields, making them promising for applications in light-emitting devices.
研究不足
The study focuses on the luminescent properties of Zn-MOF doped with Eu3+ and Tb3+. The synthesis and doping process may require optimization for higher concentrations of lanthanides to avoid decrease in emission intensity.
1：Experimental Design and Method Selection:
The synthesis of Zn-MOF was carried out using a slow diffusion route with post-doping of rare earth ions (Eu3+, Tb3+). DFT and TD-DFT calculations were performed to understand the geometries, frontier molecular orbitals, and singlet and triplet state energies of the polymer.
2：Sample Selection and Data Sources:
Zn-MOF was doped with Eu3+ or Tb3+ in different proportions. The luminescent properties were studied using various spectroscopic techniques.
3：List of Experimental Equipment and Materials:
Instruments used include an EA 1108 analyser for elemental analyses, PerkinElmer Spectrum 400 spectrometer for FT-IR spectra, DSC1 Mettler Toledo for DSC analyses, Ocean Optics DT1000 CE UV/Vis Spectrophotometer for electronic absorption spectra, SpectraPro 2300i monochromator for emission and excitation spectra, and Edinburgh FS5 spectrofluorometer for quantum yields measurements.
4：Experimental Procedures and Operational Workflow:
The synthesis involved refluxing Zn-MOF with lanthanide ions in MeCN, followed by centrifugation, washing, and drying. The luminescent properties were then measured.
5：Data Analysis Methods:
The luminescent decay curves were fitted with a monoexponential function to obtain lifetimes. Quantum yields were measured using an integrating sphere.
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PerkinElmer Spectrum 400 spectrometer
Spectrum 400
PerkinElmer
Recording FT-IR spectra
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Ocean Optics DT1000 CE UV/Vis Spectrophotometer
DT1000 CE
Ocean Optics
Recording electronic absorption spectra of solid samples
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Hamamatsu R955
R955
Hamamatsu
Photomultiplier for decay curves measurement
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Edinburgh FS5 spectrofluorometer
FS5
Edinburgh
Measuring quantum yields
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Oxford Gemini
Gemini
Oxford
Single crystal structures by X-ray diffraction
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JEOL JSM-5900-LV
JSM-5900-LV
JEOL
Scanning electron microscopy measurements
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Oxford ISIS energy dispersive spectroscopy
ISIS
Oxford
Studying the lanthanides concentration in Zn-MOF
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4,4’-Bipyridilyl
Sigma-Aldrich
Organic linker in the synthesis of Zn-MOF
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zinc acetate dihydrate
Sigma-Aldrich
Metal source in the synthesis of Zn-MOF
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europium(III) nitrate pentahydrate
Sigma-Aldrich
Doping agent for Zn-MOF
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terbium(III) nitrate pentahydrate
Sigma-Aldrich
Doping agent for Zn-MOF
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methanol
Sigma-Aldrich
Solvent in the synthesis of Zn-MOF
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acetonitrile
Sigma-Aldrich
Solvent in the doping process of Zn-MOF
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Instruments EA 1108 analyser
EA 1108
Instruments
Elemental analysis of the rare earth doped MOFs
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DSC1 Mettler Toledo
DSC1
Mettler Toledo
Differential scanning calorimetry analyses
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SpectraPro 2300i monochromator
2300i
SpectraPro
Measuring emission, excitation spectra and luminescent decay curves
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