Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu , Sichuan 610064 , China.
Analytical and Testing Center , Sichuan University , Chengdu 610064 , China.
Anal Chem. 2019 Apr 2;91(7):4860-4867. doi: 10.1021/acs.analchem.9b00592. Epub 2019 Mar 21.
Recognition of volatile organic compounds (VOCs) is a hot topic full of challenge from the perspective of environmental protection and human security. Here, we developed a novel ratiometric cataluminescence (RCTL) method for fast identification and detection gas compounds at various concentrations based on the energy transfer process, by the means of introducing rare earth ions codoped metal oxide into cataluminescence (CTL) sensor system to work as sensing material. When the prepared stick-like YO:Eu,Tb is exposed to kinds of analytes, different energy transfer process take place to emit two new signals at the characteristic wavelength of Tb (I) and Eu (I), which is available for us to identify miscellaneous gaseous compounds rely on the ratio of I to I (I/I). To confirm the feasibility of the proposed method, seven kinds of gas compounds, including homologous series and even structural isomers, were investigated and successfully distinguished in a wide range of concentrations. Besides, further discussion of the CTL sensing and recognition mechanism in this paper has facilitating effects on exploring reactive intermediates and explaining the essential principle of catalytic oxidation process.
挥发性有机化合物（VOCs）的识别是一个热门话题，从环境保护和人类安全的角度来看，这充满了挑战。在这里，我们开发了一种新颖的比率型催化发光（RCTL）方法，通过将稀土离子共掺杂金属氧化物引入到催化发光（CTL）传感器系统中作为传感材料，基于能量转移过程，实现了对各种浓度下气体化合物的快速识别和检测。当制备的棒状 YO：Eu，Tb 暴露于各种分析物时，会发生不同的能量转移过程，在 Tb（I）和 Eu（I）的特征波长处发射两个新信号，我们可以根据 I 与 I 的比值（I/I）来识别各种气态化合物。为了确认所提出方法的可行性，我们研究了包括同系物和甚至结构异构体在内的七种气体化合物，并在很宽的浓度范围内成功进行了区分。此外，本文对 CTL 传感和识别机制的进一步讨论有助于探索反应中间体并解释催化氧化过程的基本原理。
