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首页> 外文期刊>Advanced Functional Materials >Triplet-Triplet Annihilation-Based Anti-Stokes Oxygen Sensing Materials with a Very Broad Dynamic Range
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Triplet-Triplet Annihilation-Based Anti-Stokes Oxygen Sensing Materials with a Very Broad Dynamic Range

机译：基于三重三重An灭的反斯托克斯氧感测材料，具有非常宽的动态范围

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摘要

A novel concept for designing optical oxygen sensing materials is reported. Oxygen-sensitive anti-Stokes emission is generated via triplet-triplet annihilation-based upconversion and serves as an analytical parameter. Porous glass beads are used to incorporate the "sensing chemistry" including a sensitizer and an annihilator dissolved in a high boiling solvent. The beads are dispersed in silicone rubber or Teflon AF to produce solid state optodes. Inexpensive low power light sources (LEDs) are used for the excitation. The upconverted emission shows unmatched sensitivity both for the luminescence decay time and for the luminescence intensity. The latter features unusual quadratic Stern-Volmer plots. Much lower sensitivity of the residual NIR luminescence of the sensitizer allows determination of pO_2 in the broad dynamic range from trace oxygen quantities to ≈40 kPa. Interrogation of the sensors in frequency domain is demonstrated. Influence of the excitation light power on the calibration, temperature effects, dynamic response to altering pO_2, and photostability of the sensing materials are also investigated.
机译：报道了设计光学氧感测材料的新颖概念。氧敏感的反斯托克斯发射是通过基于三重态-三重态an灭的上转换而产生的，并用作分析参数。多孔玻璃珠用于掺入“传感化学”，包括溶解在高沸点溶剂中的敏化剂和an灭剂。珠子分散在硅橡胶或Teflon AF中以产生固态光电二极管。廉价的低功率光源（LED）用于激励。上转换的发射对于发光衰减时间和发光强度均显示出无与伦比的灵敏度。后者具有不寻常的二次斯特恩-沃尔默图。敏化剂残留NIR发光的灵敏度大大降低，因此可以在从痕量氧到≈40 kPa的宽动态范围内测定pO_2。展示了在频域中对传感器的询问。还研究了激发光功率对标定，温度影响，对改变pO_2的动态响应以及感测材料的光稳定性的影响。

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  • 来源
    《Advanced Functional Materials》 |2012年第20期|p.4360-4368|共9页
  • 作者

    Sergey M. Borisov; Christoph Larndorfer; Ingo Klimant;

  • 作者单位

    Institute of Analytical Chemistry and Food Chemistry Graz University of Technology Stremayrgasse 9, 8010, Graz, Austria;

    Institute of Analytical Chemistry and Food Chemistry Graz University of Technology Stremayrgasse 9, 8010, Graz, Austria;

    Institute of Analytical Chemistry and Food Chemistry Graz University of Technology Stremayrgasse 9, 8010, Graz, Austria;

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