Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Indian Institute of Technology Madras, Chennai 600036, India.
Department of Chemistry, Indian Institute of Technology Indore (IIT Indore), Indore 453552, India.
Nanoscale. 2023 May 11;15(18):8141-8147. doi: 10.1039/d3nr00416c.
We present the fabrication and use of a film of a carborane-thiol-protected tetranuclear copper cluster with characteristic orange luminescence using ambient electrospray deposition (ESD). Charged microdroplets of the clusters produced by an electrospray tip deposit the clusters at an air-water interface to form a film. Different microscopic and spectroscopic techniques characterized the porous surface structure of the film. Visible and rapid quenching of the emission of the film upon exposure to 2-nitrotoluene (2-NT) vapours under ambient conditions was observed. Density functional theory (DFT) calculations established the favourable binding sites of 2-NT with the cluster. Desorption of 2-NT upon heating recovered the original luminescence, demonstrating the reusability of the sensor. Stable emission upon exposure to different organic solvents and its quenching upon exposure to 2,4-dinitrotoluene and picric acid showed selectivity of the film to nitroaromatic species.
我们展示了一种使用环境电喷雾沉积（ESD）制备的具有特征橙色发光的碳硼烷-巯基保护的四核铜簇薄膜的制造和应用。电喷雾尖端产生的带电微液滴在空气-水界面沉积铜簇以形成薄膜。不同的微观和光谱技术对薄膜的多孔表面结构进行了表征。在环境条件下，薄膜暴露于 2-硝基甲苯（2-NT）蒸气时，观察到发射的可见和快速猝灭。密度泛函理论（DFT）计算确定了 2-NT 与簇的有利结合位点。加热时 2-NT 的解吸恢复了原始发光，证明了传感器的可重复使用性。薄膜对不同有机溶剂的稳定发射及其对 2,4-二硝基甲苯和苦味酸的猝灭表明该薄膜对硝基芳烃物质具有选择性。
