Quercetin is found in many foods, as well as in seeds, nuts, flowers, barks, and leaves. It is the most abundant of the flavonoid molecules. Rutin is the sugar‐containing homologue of quercetin — quercetin‐3‐rutinoside. Visible photoluminescence spectra of solid state quercetin and rutin are under attention in this paper. The spectra were obtained at wavelenght of excited light 457.9 nm.

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