摘要
以稀土氯化物、噻吩甲酰基三氟丙酮（TTA）为原料分别合成了稀土离子Ln3＋（La3＋、Gd3＋、Y3＋）掺杂Eu（TTA）。探针分子；将探针分子与甲基丙烯酸甲酯（MMA）混合后聚合，获得Ln3＋掺杂Eu（TTA）。／PMMA温敏漆。采用红外光谱、紫外吸收光谱、激发发射光谱对探针分子结构及温敏漆荧光特性进行表征。红外光谱表明，Ln3＋与TTA配位成键，Ln3＋的掺入未改变Eu（TTA）。结构。紫外吸收光谱显示，探针分子的最佳吸收波段位于290～376nm。340nm激发下，发现温敏漆在614nm处具有最强荧光发射峰，且Ln3＋的掺入对Eu（TTA）。发光具有增益作用。不同温度下发射光谱表明，随着温度的升高，温敏漆的最强荧光发射峰强度逐渐减弱，说明温敏漆具有良好的温度猝灭特性，且Ln3＋的掺入能够提高温敏漆的测温灵敏度，其中Gd抖掺杂Eu（TTA）。／PMMA温敏漆测温灵敏度最高。
The rare earth ion Ln3＋ （La3＋ .Gd3＋ .y3＋ ） doped Eu（TTA）3 probe molecule was pre- pared separately,which the rare earth chloride and TTA was used as raw materials,and then the rare earth ion Ln3＋ （La3＋ . Gd3＋ . y3＋ ） doped Eu （TTA）3/PMMA temperature-sensitive paint （TSP） was obtained when the probe molecule was 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 spec- tra. IR analysis indicated that the coordinate bond between Ln3＋ and TTA was formed,and the struc- ture of Eu（TTA）3 was not destroyed when Ln3＋ was doped into Eu（TTA）3. UV absorption spectra showed that the absorption band of the probe molecule is 290~376 nm. 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 rare earth. The emission spectra of the TSP at different temperatures illustrated that the e- mission strength of the TSP is decreased with the increasing of temperature,it showed the TSP has good temperature quenching property. Furthermore, the temperature measure sensitivity is also en- hanced for the doping of rare earth and the gadolinium doped Eu（TTA）3/PMMA temperature-sensi- tive paint has the highest measure sensitivity.
出处
《弹性体》
CAS
2015年第6期15-19,共5页
China Elastomerics
基金
预研基金资助项目(BQ0302)
关键词
温敏漆
温度猝灭
发光探针分子
稀土
temperature sensitive paint
temperature quenching
luminescent probe molecules
rareearth
