稀土钇掺杂Eu(TTA)3/PMMA温敏漆的制备及性能分析

Preparation and Properties of Rare Earth Yttrium Doped Eu(TTA)3/PMMA Temperature Sensitive Paint

本文以氯化铕、氯化钇、噻吩甲酰基三氟丙酮（TTA）为原料合成了钇掺杂Eu（TTA）3探针分子。将探针分子掺杂到聚甲基丙烯酸甲酯（PMMA）基质中，获得稀土钇掺杂Eu（TTA）3/PMMA温敏漆。采用IR、紫外吸收光谱和激发发射光谱对探针分子结构及温敏漆荧光特性进行了表征。红外光谱表明，稀土Eu（Y）与TTA形成配位键，且钇的掺入未改变Eu（TTA）3结构。紫外吸收光谱表明，探针分子的最佳吸收波段位于290-376nm处。激发发射光谱表明,在340nm激发下，温敏漆在614nm处有最强发射峰，且钇对Eu（TTA）3发光具有增益作用，当钇含量为50％时,增益作用最强。不同温度下发射光谱表明，随着温度的升高，温敏漆的荧光发射强度逐渐减弱,说明温敏漆具有良好的温度猝灭特性，且掺入钇后温敏漆的测温灵敏度有所提高。

In this paper, the yttrium doped Eu （TTA）3 probe molecule were prepared, which the EuCl3, YCl3 and 2-Thenoyltrifluoroacetone （TTA） were used as raw materials, and then the yttrium doped Eu （TTA）3/Polymethyl- methacrylate （PMMA） temperature-sensitive paint （TSP） was obtained when the yttrium doped Eu （TTA）3 probe molecule were doped into the PMMA. The structure of the probe molecule and the properties of the TSP were characterized by IR, absorption spectra, excitation and emission spectra, IR analysis indicate that the coordinate bond between Eu（Y） and TTA was formed, and the structure of Eu（TTA）3 was not destroyed when the yttrium was doped into Eu（TTA）3. UV absorption spectra show that the absorption band of the probe molecule is 290-376 nm. Excitation and emission spectra illustrate that the strongest emission peak is 614 nm when the TSP was excited by 340 nm, and the emission of Eu （TTA）3 will be enhanced for the doping of yttrium, and the gain function was the strongest when the ratio between Eu and Y was 0.5：0.5. The emission spectra of the TSP at different temperatures illustrate that the emission strength of the TSP was decreased with the increasing of temperature, it shows that the TSP has good temperature quenching property, Furthermore, the temperature measure sensitivity was also enhanced for the doping of yttrium.