Synthesis of copper nanoclusters from Bacopa monnieri leaves for fluorescence sensing of dichlorvos

Abstract

AbstractIn this work, a facile one‐step green synthesis was developed for the fabrication of blue fluorescent copper nanocluster (Brahmi‐CuNCs) from the extract of Bacopa monnieri (common name is Brahmi) via a microwave method. The as‐prepared Brahmi‐CuNCs emitted blue fluorescence at 452 nm when excited at 352 nm and showed a quantum yield of 31.32%. Brahmi‐derived blue fluorescent CuNCs acted as a probe for fluorescence sensing of dichlorvos. Upon the addition of dichlorvos, the blue emission for Brahmi‐CuNCs was gradually turned off, favouring establishment of a calibration graph in the range 0.5–100 μM with a detection limit of 0.23 μM. The as‐synthesized Brahmi‐CuNCs exhibited marked sensitivity and selectivity towards dichlorvos, favourable for assaying dichlorvos in various samples (cabbage, apple juice, and rice).