Morin as a spectrophotometric reagent for gold

Selective determination of Fe(III) in Fe(II) samples by UV-spectrophotometry with the aid of quercetin and morin

“…The second absorption band in the 260-340 nm region is characteristic of the oxidized form of the reagent. Similar absorption bands, identified as characteristic of quinone derived from the flavonoid compounds used, were observed earlier in the other systems containing quercetin and morin and metal ions of oxidizing properties, Ru(IV), Au(III) and Os(VIII) (9,11,12).…”

“…Occurrence of redox reactions has been observed in the systems containing metal ions and flavonoid compounds (6)(7)(8)(9)(10)(11)(12). In our earlier studies (9,11,12), we proved that the oxidized forms of quercetin and morin generated in the presence of ruthenium(IV), gold(III) and osmium(VIII) could be successfully used for quantification of metals in the examined solutions. In this work, the redox reaction of Fe(III) with quercetin has been used for its determination in Fe(II) samples.…”

Synthesis, characterization, spectroscopic and antioxidation studies of Cu(II)–morin complex

“…Due to well-situated location of the 5OH and 4CO as well as 3OH and 4CO groups in a molecule, morin forms chelate complexes with ions of p-, d-, and f-electron metals. Morin has been used as a colorimetric reagent for spectrophotometric determination of [14][15][16]. Morin hydrate can frequently be used as a food preservative and has been shown to prevent lipid per oxidation.…”

Synthesis and evaluation of antioxidant and antibacterial properties of morin complexes

“…Complex formation has importance in many life functions [3,21,22], presenting increased activity [23]. Morin (figure 1) is a phenolic compound derived from the hydroxyl substitution of flavone [24]. It is present in tea, coffee, cereal grains, fruits, vegetables, and many traditional Chinese herbal medicines [25].…”