Selective optosensing rutin and quercetin by novel hybrid organic-inorganic - inorganic lead-free copper halide perovskite

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 C 18 H 39 N (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 mu M. The reliability of the proposed assay was validated by quantifying Rutin and Quercetin in fruit samples.