School of Chemistry and Chemical Engineering & School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
Analyst. 2016 Jul 21;141(14):4502-10. doi: 10.1039/c6an00840b. Epub 2016 May 9.
Rapid detection of nitroaromatic explosives is of utmost importance from the perspectives of civilian safety, the natural environment and human health. Herein, we design a simple yet powerful optical sensing motif based on an electrodeposited luminescent MOF thin film of {[Eu2(TDC)3(CH3OH)2]·CH3OH} (Eu-TDC, where TDC is thiophene-2,5-dicarboxylate). The parameters of the electrodeposition process were investigated and optimized. The phase and elemental composition of the Eu-TDC film were confirmed using powder X-ray diffraction (PXRD) and energy dispersive spectrometry (EDS), and its morphology and structure were examined using scanning electron microscopy (SEM). This thin film shows extremely good luminescence properties with characteristics of Eu(3+) that are sensitized by the electron-rich ligands, which allows for high efficiency in electron-deficient nitroaromatic explosive sensing. Selective and sensitive responses to a series of nitroaromatic explosives were exhibited, especially for nitrophenols (TNP/DNP/4-NP, KSV > 10(4) M(-1)). It is also an efficient luminescent sensor for detecting nitrobenzene vapour. Significantly, this film can be easily recycled just by washing with methanol. The potential sensing mechanisms are discussed in detail.
从民用安全、自然环境和人类健康的角度来看，快速检测硝基芳香族爆炸物至关重要。在此，我们设计了一种基于电沉积发光 MOF 薄膜 [{Eu2(TDC)3(CH3OH)2]·CH3OH}（Eu-TDC，其中 TDC 是噻吩-2,5-二甲酸酯）的简单而强大的光学传感基元。我们研究并优化了电沉积过程的参数。使用粉末 X 射线衍射（PXRD）和能量色散光谱法（EDS）确认了 Eu-TDC 薄膜的相和元素组成，并使用扫描电子显微镜（SEM）检查了其形态和结构。该薄膜具有极好的发光性能，具有由富电子配体敏化的 Eu(3+)的特征，使其在电子缺的硝基芳香族爆炸物传感中具有高效率。它对一系列硝基芳香族爆炸物表现出选择性和灵敏的响应，特别是对硝基苯酚（TNP/DNP/4-NP，KSV > 10(4) M(-1)）。它也是检测硝基苯蒸气的有效发光传感器。值得注意的是，该薄膜只需用甲醇洗涤即可轻松回收。详细讨论了潜在的传感机制。
