稀土铕、铽配合物在温度发光传感领域的研究进展

稀土发光配合物材料基于其独特的4f-4f电子跃迁表现出优异的发光性能,特别是铕和铽配合物材料,发光波长在可见光区范围内,发射谱带狭窄且尖锐(半峰宽通常小于10 nm),非常适合应用于显示设备和传感装置。同时,具备温度依赖发光性能的铕和铽配合物能够实现高灵敏度、高效的温度传感过程,使其有望用于流体动力学、航空航天、环境工程、能源技术等领域温度的测量和监控。本综述详细介绍了近10年来,铕和铽配合物温度传感体系的研究进展,总结了配合物材料类别以及温度响应灵敏度影响因素,进一步归纳了振动弛豫、能量转移等几类响应机制,并详细介绍了铕/铽发光配合物光学比率温度计的研究成果,为镧系金属配合物温度传感性能的研究进行了全面总结,以期打开此类材料实际应用的大门。

Research Progress of Europium or Terbium Complexes in Field of Thermo-Sensitive Luminescence

Luminescent lanthanide(Ⅲ) complex materials exhibit excellent luminescence properties based on their unique 4 f-4 f electronic transitions, especially europium and terbium complex materials. Their emission bands are narrow and sharp(the half-value width is usually less than 10 nm) and in the visible range, which make them very suitable for use as display equipment and sensing devices. At the same time, the europium and terbium complexes with thermo-sensitive luminescence properties can achieve a highly sensitive and efficient temperature sensing process, making it promising for temperature measurement and monitoring in fluid dynamics, aeronautical engineering, environmental engineering, energy technology and other fields. In this review, the research progress on thermo-sensitive luminescent materials based on europium and terbium complexes in the past ten years were introduced. We also summarized the structure characteristics of this type of materials and the influencing factors of temperature response sensitivity, and further generalized several types of response mechanisms such as vibration relaxation and energy transfer. The research results of the optical ratiometric thermometer of the europium/terbium luminescent complex were also introduced in detail, and the research on the temperature sensing performance of the lanthanide metal complex was comprehensively summarized, in order to open the door to the practical application of such materials.