Abstract
An optical sensor based on fluorescence quenching has been developed for detecting Quercetin and Rutin. The signal source for this sensor is a hybrid organic–inorganic lead-free copper halide perovskite material, OA3Cu2I4Cl (OACuH), synthesized from octadecylamine C18H39N (OA), CuI, and CuCl. When excited at a wavelength of 355 nm, the resulting material exhibits stability and emits bright light. Characterization of the synthesized material was conducted using various methods including as X-ray powder diffraction, Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy (XPS), and fluorescent analysis. Addition of Quercetin and Rutin to OACuH resulted in a reduction in its fluorescence. The proposed sensor demonstrates excellent selectivity and a low limit of detection (70 nM for quercetin and 50 nM for rutin) within the range of 0.1–200 µM. The reliability of the proposed assay was validated by quantifying Rutin and Quercetin in fruit samples.
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