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RESEARCH PRODUCT

Oxidation of diclofenac in the presence of iron(II) octacarboxyphthalocyanine

Małgorzata A. BrodaŁUkasz KołodziejAnna PoliwodaJoanna Nackiewicz

subject

Environmental EngineeringDiclofenacAbsorption spectroscopyIronHealth Toxicology and MutagenesisRadical0208 environmental biotechnology02 engineering and technology010501 environmental sciencesDFT calculations01 natural sciencesHigh-performance liquid chromatographyCatalysischemistry.chemical_compoundDiclofenacmedicineEnvironmental ChemistryFerrous Compounds0105 earth and related environmental sciencesMS analysisHplc analysisChemistryPublic Health Environmental and Occupational HealthMs analysisHydrogen PeroxideGeneral MedicineGeneral ChemistryUV–Vis spectraPollution020801 environmental engineeringTD-DFT spectraMonomerIron octacarboxyphthalocyanineHPLCOxidation-ReductionNuclear chemistrymedicine.drug

description

Abstract This paper presents the results of the research on the influence of catalytic activity of iron(II) octacarboxyphthalocyanines (FePcOC) on the transformation of diclofenac (DCF) which is the most popular anti-inflammatory analgesic. Diclofenac poses a serious threat to the natural environment. The paper demonstrates that diclofenac, in the presence a monomeric form of iron octacarboxyphthalocyanine and hydroxyl radicals (HO•) (from H2O2), undergoes a transformation into diclofenac-2,5-iminoquinone (DCF-2,5-IQ), causing distinct changes in the UV–Vis absorption spectrum. In the presence of iron octacarboxyphthalocyanine and H2O2, the previously colourless diclofenac solution becomes intense orange. As a result, a new band at approx. 450 nm appears in the absorption spectrum. HPLC analysis has shown that the concentration of diclofenac decreases with time. TD-DFT calculations using the CAM-B3LYP/6-31+G (d, p) method have been conducted to confirm experimental data concerning the formation of a new band at λmax = 450 nm.

yearjournalcountryeditionlanguage
2021-02-01Chemosphere
10.1016/j.chemosphere.2020.129145https://doi.org/10.1016/j.chemosphere.2020.129145