Ahmed Shahnaz, Mohanta Dambarudhar, Baruah Kankana, Dolui Swapan Kumar
Department of Chemical Sciences, Tezpur University, Napaam, Tezpur, 784028, Assam, India.
Department of Physics, Tezpur University, Nappam, Tezpur, 784028, India.
Anal Methods. 2023 Nov 30;15(46):6394-6403. doi: 10.1039/d3ay01458d.
The uses of highly luminescent perovskite quantum dots in real analytical detection were limited by their supersensitive nature. Here, we have designed a CsPbBr perovskite based fluorometric sensor by integrating them with a zeolitic imidazole framework (ZIF-8) an one step technique and established its stability in aqueous and other polar solvents. The CsPbBr@ZIF-8 luminescence sensor functioned excellently for the trace detection of 4-nitroaniline and rhodamine blue dye molecules with a detection limit value of 8.367 ppb and 0.088 ppm, respectively. A comprehensive investigation found that the quenching of the fluorescence signal occurred fluorescence resonance energy transfer (FRET) for rhodamine blue dye and a H-bonding interaction induced trap density mediated quenching mechanism was responsible for 4-NA detection. The potential of this suggested sensor as a cheap portable test paper probe for analyte detection was also explored. This study introduces CsPbBr as a cutting-edge sensing platform for industrial pollutants such as dye molecules and nitroaromatics.
高发光性钙钛矿量子点在实际分析检测中的应用受到其超灵敏性质的限制。在此，我们通过一步法将CsPbBr钙钛矿与沸石咪唑框架（ZIF-8）整合，设计了一种基于荧光的传感器，并确定了其在水和其他极性溶剂中的稳定性。CsPbBr@ZIF-8发光传感器在痕量检测4-硝基苯胺和若丹明蓝染料分子方面表现出色，检测限分别为8.367 ppb和0.088 ppm。全面研究发现，若丹明蓝染料的荧光信号猝灭是通过荧光共振能量转移（FRET）发生的，而4-硝基苯胺检测则是由氢键相互作用诱导的陷阱密度介导的猝灭机制所致。我们还探索了这种建议的传感器作为用于分析物检测的廉价便携式试纸探针的潜力。本研究将CsPbBr引入作为用于检测染料分子和硝基芳烃等工业污染物的前沿传感平台。
