Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 397, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2023.134702
Keywords
Py-HOF; Ratiometric; Energy transfer; ECL; PM2.5
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This study developed a new Py-HOF material and constructed a dual-wavelength ECL sensor for rapid detection of heavy metal ions, Hg2+ and Pb2+, in PM2.5. The sensor showed superior electrochemiluminescence and provided improved accuracy for environmental monitoring and assay.
Rapid detection of heavy metal ions in PM2.5, especially Hg2+ and Pb2+, is a crucial analytical topic. Herein, a new pyrene-based hydrogen-bonded organic framework (Py-HOF) with very superior electrochemiluminescence (ECL) is developed, and a dual-wavelength ratiometric ECL sensor based on perfectly matched wavelength and energy transfer of Py-HOF and RuSiO2 was constructed to detect dual-target heavy metals. By designing Hg2+ triggered enzymatic amplification to release DNA 1, the RuSiO2 ECL probe was introduced onto the Py-HOFmodified electrode, so ECL of Py-HOF decreased and RuSiO2 ECL increased for Hg2+ detection. Furthermore, specific recognition of Pb2+ to the DNA enzyme capture strand induced increased ECL signal of Py-HOF and decreased ECL of RuSiO2 for Pb2+ assay. The work develops a HOF material and applies to a novel dualwavelength ECL sensor for detecting two heavy metals in PM2.5 for the first time, which opens a promising ECL strategy with improved accuracy for environmental monitoring and assay.
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