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Citation: TANG Juan, SUN Jing, ZHOU Chen, ZHAO Ying, GUO Xin, YIN Yu-Ting. Effects of Rare Earths (Gd³⁺, La³⁺) on Fluorescence and Temperature Sensitivity of Eu(p-MOBA)₃phen/PMMA[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(8): 1485-1491. doi: 10.11862/CJIC.2020.145 shu

Effects of Rare Earths (Gd³⁺, La³⁺) on Fluorescence and Temperature Sensitivity of Eu(p-MOBA)₃phen/PMMA

School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Jilin Province Optical Materials and Chemical Technology Innovation Center, Joint Sino-Russian Laboratory of Optical Materials and Chemistry, Changchun 130022, China

Corresponding author: SUN Jing, sj-cust@126.com
Received Date: 7 April 2020
Revised Date: 22 April 2020

Figures(10)

The different rare earth (Gd³⁺, La³⁺) doped Eu(p-MOBA)₃phen probe molecules were prepared by using rare earth oxides (Eu₂O₃, Gd₂O₃, La₂O₃), p-methoxybenzoic acid (p-MOBA) and phenanthroline (phen). The different rare earth (Gd³⁺, La³⁺) doped Eu(p-MOBA)₃phen/PMMA temperature sensitive paints (TSPs) were fabricated by mixing the probe molecules with methyl methacrylate (MMA) and initiating polymerization with benzoyl peroxide (BPO). The morphology, structure, luminescence properties of the probe molecules, and the fluorescence temperature quenching property of the TSPs were characterized by scanning electron microscopy, UV-Vis absorption spectra, infrared spectrometer and fluorescence spectra. The infrared spectrum, UV-Vis absorption spectra and scanning electron microscopy spectra show that Eu³⁺ was successfully coordinated with the ligands p-MOBA and phen, and the structure of Eu(p-MOBA)₃phen was not changed when doped with rare earth ions (Gd³⁺, La³⁺), indicating that the doping of rare earth ions (Gd³⁺, La³⁺) partially replaced Eu³⁺. The fluorescence spectrum shows that the addition of rare earth ions (Gd³⁺, La³⁺) have a gain effect on the luminescence of Eu(p-MOBA)₃phen, and the corresponding TSPs have good fluorescence temperature quenching property in the temperature range of 50~100℃. Compared with La³⁺ doped Eu(p-MOBA)₃phen/PMMA, Gd³⁺ doped Eu(p-MOBA)₃phen/PMMA has stronger fluorescence emission and higher temperature sensitivity. It can be seen that different rare earths (Gd³⁺, La³⁺) have different effects on the fluorescence and temperature sensitivity properties of Eu(p-MOBA)₃phen/PMMA.
- rare earth,
- temperature sensitive paint,
- probe molecule,
- fluorescence,
- temperature quenching
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