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- W1024451115 abstract "Oxidativ katalizis metalloenzim modellekkel A bioszervetlen kemia egyik fontos kutatasi iranyzata a biomimetikus oxidaciok vizsgalata. Munkank soran vizsgaltuk a pirokatechin oxidaz, fenoxazinon szintetaz, szuperoxid dizmutaz es katalaz enzimek funkcionalis modellezeset mangan, vas es nikkel komplexekkel. Kimutattuk, hogy a dioximato-vas(II) es nikkel(II) komplexek gyorsitjak pirokatechin szarmazekok bazis katalizalt oxidaciojat. A reakciok mechanizmusanak tisztazasa erdekeben indokolt volt reszletes reakciokinetikai meresek elvegzese. A ferroxim(II)komplex ([Fe(Hdmg)2(Melm)2] alkalmasnak bizonyult a fenoxazinon szintetaz modellezesere, 2-amino-fenol szarmazekok, mint modell szubsztratumok oxidaciojaban. Megallapitottuk, hogy a [Mn2(HL)2](BPh4)2 {ahol H2L egy otfogu dioxim ligandum HON=C(CH3)C(CH3)=N-CH2CH2)2NH} szelektiv katalizatorkent viselkedik az adrenalin oxidaciojaban adrenokromma karbonat pufferben. Kimutattuk, hogy a dioximato-mangan(II)komplex gyorsitja a hidrogen peroxid bomlasat vizze es oxigenne, igy a katalaz enzim funkcionalis modelljenek tekinthető. | Oxidative catalysis using metalloenzyme models One of the major subjects of bioinorganic chemistry is the study of biomimetic oxidations. We have studied catechol oxidase, phenoxazinone synthase, superoxide dismutase and catalase enzymes using manganese, iron and nickel complexes as functional models. We have established that dioximato-iron(II) and nickel(II) complexes accelerate the base-catalyzed oxidation of catechol derivatives. For establishing the underlying mechanism, we have carried out detailed kinetic studies of the catalytic oxidation. Ferroxime(II) is a suitable model for phenoxazinone synthase in the oxidation of 2-amino-phenol derivatives as model substrates. The complex [Mn2(HL)2](BPh4)2 {where H2L is the quinquedentate dioxime ligand HON=C(CH3)C(CH3)=N-CH2CH2)2NH} was found to be a selective catalyst for the oxidation of epinephrine to adrenochrome in carbonate buffer. We have demonstrated that dioximato-manganese(II)complex accelerate the disproportionation of hydrogen-peroxide into water and dioxygen in buffered aqueous solution thus can be regarded as catalase model." @default.
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- W1024451115 date "2012-01-01" @default.
- W1024451115 modified "2023-10-18" @default.
- W1024451115 title "Oxidatív katalízis metalloenzim modellekkel = Oxidative catalysis using metalloenzyme models" @default.
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