CsPbBr 3 perovskite quantum dot decorated ZIF-8 MOF: a selective dual recognition fluorometric visual probe for 4-nitroaniline and rhodamine blue

• Published in: Analytical methods 2023-11, Vol.15 (46), p.6394-6403
• Main Authors: Ahmed, Shahnaz, Mohanta, Dambarudhar, Baruah, kankana, Dolui, Swapan Kumar
• Format: Article
• Language: English
• ISSN: 1759-9660; 1759-9679
• 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 3 perovskite based fluorometric sensor by integrating them with a zeolitic imidazole framework (ZIF-8) via an in situ one step technique and established its stability in aqueous and other polar solvents. The CsPbBr 3 @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 via 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 3 as a cutting-edge sensing platform for industrial pollutants such as dye molecules and nitroaromatics.