在PMMA/EuIII复杂膜中结合拉曼波段和发光波段的光学比度温度计
Tayne P Pereira1, Felipe S M Canisares1, Leandro R Marques1
1Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo (USP), São Paulo, São Paulo 05508-000, Brazil.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|November 20, 2025
概括
这项研究介绍了一种新的混合光学温度计,它结合了拉曼和发光. 这种创新方法通过在聚合物矩阵内使用欧协调化合物来提高温度传感灵敏度.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 频谱学是一种光谱学.
背景情况:
- 光学温度传感对于监控各种过程至关重要.
- 拉曼温度计提供结构洞察力,而发光温度计提供高热灵敏度.
- 兰化物 ((III) 协调化合物是光学温度探测器,特别是比度方法的关键,但实现高灵敏度仍然具有挑战性.
研究的目的:
- 通过整合拉曼波段和发光波段来开发混合光学温度计.
- 为增强温度传感创建一个比度温度参数 (Δ = I发光/I拉曼).
- 为了研究混合系统的温度依赖行为和灵敏度.
主要方法:
- 在聚甲基酸盐 (PMMA) 基质中加入[Eu(nta) 3]复合物,形成透明的薄膜.
- 在同一拉曼光谱内同时检测PMMA振动 (拉曼波段) 和EuIII排放 (发光波段).
- 对发光和拉曼波段进行比度分析,以确定100420K范围内的温度.
主要成果:
- 通过使用EuIII-PMMA薄膜成功制造了一种混合光学温度计.
- 对比度参数观察到两种不同的温度依赖模式:在280K以下以拉曼为主 (Sm = 1.1% K-1) 和在280K以上以发光为主 (Sm = 5.2% K-1).
- 温度参数在9个加热-冷却周期中显示出强大的可重复性.
结论:
- 混合光学温度计采用了结合发光和拉曼波段的比度方法,为温度传感提供了一个多功能和灵活的平台.
- 这种方法显著提高了热灵敏度,相比传统的比度方法,仅依赖于发光.
- 开发的基于协调化合物的EuIII探测器显示出对高度敏感的光学温度监测应用非常有前途.
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