Investigation of 3d-transition metal acetates in the oxidation of substituted dioxolene and phenols

Weakly antiferromagnetic vanillin and acetate bridged dinuclear Ni(ii) compound exhibiting catecholase-like activity and biological properties

“…To identify the oxidised product, the reaction medium was allowed to evaporate at room temperature, resulting in the formation of dark brown crystals which were isolated and further purified using column chromatography and characterized using NMR spectroscopy in CDCl 3 . The 1 H NMR data of the product shown in Fig S5, ESI† is similar to that reported in the literature for 3,5-DTBQ, 82 thereby confirming the formation of the o -quinone derivative in the reaction medium at 405 nm. The kinetics for the oxidation of 3,5-DTBC to 3,5-DTBQ were determined by the initial rate method at room temperature.…”

“…From the figure, it is clear that a new band appeared at around 405 nm, the intensity of which increases with time, suggesting the formation of the product in the reaction mixture. To identify the oxidised product, the reaction medium was allowed to evaporate at room temperature, resulting in the formation of dark brown crystals which were isolated and further purified using column chromatography and characterized using NMR spectroscopy in 82 thereby confirming the formation of the o-quinone derivative in the reaction medium at 405 nm. The kinetics for the oxidation of 3,5-DTBC to 3,5-DTBQ were determined by the initial rate method at room temperature.…”

“…61 Some reports suggest that the formation of H 2 O 2 largely depends on the metal center involved during the oxidation process. 82 Hence, it was essential to know which species are formed during the reaction; hence, we utilized the iodometric method. The oxidation of I À species to iodine followed by the generation of I 3À species is evident in our case from the absorption band obtained near 353 nm from the UV-Vis spectral study (Fig.…”

Cu(iii)–bis-thiolato complex forms an unusual mono-thiolato Cu(iii)–peroxido adduct

“…Multiple examples have been reported of Cu(II) complexes with semiquinone-based ligands similar to the structure of the dithiolate used here, which produce similar EPR spectra. 22,23 These complexes arise from the oxidation of the aryl ring. Quantitation of peaks in the EPR spectrum suggests that the paramagnetic Cu(II) complex is present only in trace amounts (ca.…”

Water treatment by the AC gliding arc air plasma

“…14. Hydrogen peroxide may be produced by combination of hydroxyl radicals and also can increase the ability of acidity of plasma, and the wavelength is approximately in the range of 379-430 nm [20,21]. By increasing hydrogen peroxide as indicated in Figs.…”