研究目的
To observe and analyze the fluorescence of solid individual compounds of Eu2+ ion, specifically EuCl2, EuI2, and EuBr2, for the first time.
研究成果
The study successfully demonstrated that Eu2+ ion fluorescence can be observed not only in solid matrices doped with small amounts of Eu2+, but also in the composition of individual inorganic compounds. The excitation and emission spectra, as well as the lifetimes of the Eu2+* ion for these europium dihalides at room temperature, were measured for the first time. These results could initiate investigations of fluorescence of other individual inorganic compounds for Eu2+ ions or Ln2+ ions of other lanthanides.
研究不足
The study is limited to the observation of fluorescence in solid individual compounds of Eu2+ ion under specific conditions (room temperature, argon atmosphere). The stability and intensity of fluorescence in air were noted, but further studies under varying conditions could provide more comprehensive insights.
1：Experimental Design and Method Selection:
The study aimed to observe fluorescence from solid individual compounds of Eu2+ ion. The methodology involved exciting powdered samples of Eu(II) halides with ultraviolet (UV) light at room temperature in an argon atmosphere.
2：Sample Selection and Data Sources:
Europium (II) dihalides EuX2 (X = Cl, Br, and I) of chemically pure grade were purchased from Sigma–Aldrich.
3：List of Experimental Equipment and Materials:
A Horiba Jobin Yvon Fluorolog‐3 spectrofluorometer (Model FL‐3‐22) was used to register FL spectra and the lifetime of the Eu2+* excited states in EuX
4：Experimental Procedures and Operational Workflow:
Solid samples of EuX2 were placed into the solid sample holder (Model 1933) and covered with a thin layer of quartz glass KU‐1 type. UV light was directed to the front wall of the glass cover at an angle of 90° to excite the sample, and FL was recorded at 60° from the surface of the samples.
5：Data Analysis Methods:
Emission spectra were corrected for source intensity and emission spectral response by standard instrument correction provided in the instrument software.
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