研究目的
To study the synthesis, characterization, luminescence, and optical properties of cerium complexes with nitrogen, oxygen, and sulfur donor ligands, including their magnetic and metamaterial behaviors.
研究成果
The cerium complexes exhibit promising luminescent, optical, magnetic, and metamaterial properties, with potential applications in semiconductors, optical waveguides, and electroluminescent devices. Future work could focus on practical implementations and further property enhancements.
研究不足
The study is limited to synthesized cerium complexes and may not generalize to other lanthanide complexes. The amorphous nature of some complexes could affect property measurements. Potential optimizations include exploring more ligands or conditions for enhanced properties.
1：Experimental Design and Method Selection:
The study involved synthesizing cerium complexes using conventional methods with various ligands, followed by characterization using multiple techniques to investigate their structural, thermal, magnetic, optical, and luminescent properties. Theoretical models for optical band gap and magnetic moment calculations were employed.
2：Sample Selection and Data Sources:
Samples included cerium complexes synthesized from cerium chloride heptahydrate and ligands such as pyrazolines, diethyldithiocarbamate, and ethylxanthate. Data were acquired through laboratory synthesis and instrumental analysis.
3：List of Experimental Equipment and Materials:
Equipment included FTIR spectrophotometer (Thermo Nicolet Model:6700), UV-Vis spectrophotometer (Varian, Cary 5000), DART mass spectrometer (JMS-T100LC Accu TOF), TGA (Perkin Elmer), PXRD (Bruker AXS D8 Advance), SEM (JEOL Model JSM-6390LV), TEM, VSM (Lakeshore VSM 7410), Abbe Refractometer (model R-8, M/S advance research instrument company), spectrofluorimeter (Jobin Yvon fluorolog), and life time system (JOBIN-VYON fluorocube). Materials included solvents (benzene, methanol, ethanol), cerium chloride heptahydrate (HPLC grade), diethyldithiocarbamate (S.D.Fine), o-hydroxyacetophenone (CDH), benzaldehydes (E.Merk), and synthesized ligands.
4：Experimental Procedures and Operational Workflow:
Complexes were synthesized by reacting cerium chloride with ligands in inert atmosphere, followed by purification. Characterization involved recording IR spectra (4000-400 cm?1), electronic spectra (1000-200 nm), mass spectra, thermal analysis (40-700°C under nitrogen), magnetic measurements at room temperature, refractive index measurements, and luminescence studies in dichloromethane.
5：Data Analysis Methods:
Data were analyzed using formulas for magnetic moment, optical band gap (Tauc plot), refractive index, extinction coefficient, and quantum yield. Statistical analysis was not explicitly mentioned, but standard methods from literature were referenced.
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FTIR Spectrophotometer
Model:6700
Thermo Nicolet
Recording IR spectra in the range 4000-400 cm?1
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PXRD
Bruker AXS D8 Advance
Bruker
X-ray diffraction studies
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SEM
JSM-6390LV
JEOL
SEM studies at magnification 5x to 300,000x
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VSM
7410
Lakeshore
Magnetic properties evaluation
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UV-Visible Spectrophotometer
Cary 5000
Varian
Recording electronic spectra in the range 1000-200 nm
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Mass Spectrometer
JMS-T100LC Accu TOF
JMS
Detecting molecular ion peaks for molecular weight determination
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TGA
Perkin Elmer
Thermal gravimetric analysis
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Refractometer
R-8
M/S advance research instrument company
Measuring refractive indices
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Spectrofluorimeter
fluorolog
Jobin Yvon
Luminescence studies in the range 200 to 1000 nm
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Life Time System
fluorocube
JOBIN-VYON
Emission life time measurements
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