【摘要】 以稀土氧化物（Eu₂O₃,Gd₂O₃,La₂O₃）、对甲氧基苯甲酸（p-MOBA）、菲咯啉（phen）为原料制备了不同稀土离子(Gd³⁺,La³⁺)掺杂的Eu（p-MOBA）₃phen探针分子。将所合成的探针分子与甲基丙烯酸甲酯（MMA）混合,以过氧化苯甲酰（BPO）为引发剂引发聚合,制得不同稀土(Gd³⁺,La³⁺)掺杂的Eu（p-MOBA）₃phen/PMMA温敏漆样品。利用扫描电镜、紫外-可见吸收光谱、红外光谱和荧光光谱对探针分子的形貌、结构、发光性能及温敏漆的荧光温度猝灭特性进行表征。红外光谱、紫外可见吸收光谱及扫描电镜能谱分析表明,Eu³⁺与配体p-MOBA、phen成功配位,且掺入的稀土离子(Gd³⁺,La³⁺)未改变Eu（p-MOBA）₃phen结构,说明掺入的稀土离子(Gd³⁺,La³⁺)部分取代了Eu³⁺。荧光光谱表明,稀土离子(Gd³⁺,La³⁺)的掺入对Eu（p-MOBA）₃phen的发光均具有增益作用,并且相应的温敏漆在50～100℃温度范围内都具有良好的荧光温度猝灭特性。而且相比于镧掺杂的Eu（p-MOBA）₃phen/PMMA,钆掺杂的Eu（p-MOBA）₃phen/PMMA具有更强的荧光发射和更高的测温灵敏度。可见,不同的稀土(Gd³⁺,La³⁺)对Eu（p-MOBA）₃phen/PMMA的荧光及温敏特性影响是不同的。更多还原

【Abstract】 The different rare earth(Gd³⁺, La³⁺) doped Eu（ p-MOBA）₃ phen 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）₃ phen/PMMA temperature sensitive paints（TSPs） were fabricated by mix-ing 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 tempera-ture quenching property of the TSPs were characterized by scanning electron microscopy, UV-Vis absorption spec-tra, 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）₃ phen 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）₃ phen, and the corresponding TSPs have good fluorescence temperature quenching property in the temperature range of 50～100 ℃. Compared with La³⁺doped Eu（p-MOBA）₃ phen/PMMA, Gd³⁺doped Eu（ p-MOBA）₃ phen/PMMA has stronger fluorescence emis-sion 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）₃ phen/PMMA.更多还原