Syntéza, krystalové struktury a katalytická oxidace aromatických uhlovodíků vanadičnými komplexy s amino-bis-phenolátovými ligandy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F07%3A00022069" target="_blank" >RIV/00216224:14310/07:00022069 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands

Popis výsledku v původním jazyce

The coordination chemistry of two aminebis(phenolate) ligands (H2L1 and H2L2) around vanadium(V)is described. Vanadium(V) oxo complexes (1, 2 and 3) of all the ligands were obtained readily by the reaction between the ligand precursors and [VO(acac)2]. Single crystal X-ray structure analysis showed that all of the complexes are penta-coordinated with trigonal bipyramidal geometry in NO4 coordination environment. The tripodal nitrogen atom of the respective ligands and monodentate alkoxo group occupy apical positions. These complexes structurally resemble very closely to the active sites of vanadium haloperoxidases (VHPO) and were found to catalyze the oxidation of toluene to benzoic acid and isomers of xylene to the corresponding hydroxy acids with turn over numbers ranging between 134 and 188. Based on mass spectra the mechanism of the catalytic process was proposed to proceed through the formation of hydroxo hydroperoxo intermediate, which is different from halo peroxidase reactions.

Název v anglickém jazyce

Synthesis, crystal structures and catalytic oxidation of aromatic hydrocarbons by oxovanadium(V) complexes of aminebis(phenolate) ligands

Popis výsledku anglicky

The coordination chemistry of two aminebis(phenolate) ligands (H2L1 and H2L2) around vanadium(V)is described. Vanadium(V) oxo complexes (1, 2 and 3) of all the ligands were obtained readily by the reaction between the ligand precursors and [VO(acac)2]. Single crystal X-ray structure analysis showed that all of the complexes are penta-coordinated with trigonal bipyramidal geometry in NO4 coordination environment. The tripodal nitrogen atom of the respective ligands and monodentate alkoxo group occupy apical positions. These complexes structurally resemble very closely to the active sites of vanadium haloperoxidases (VHPO) and were found to catalyze the oxidation of toluene to benzoic acid and isomers of xylene to the corresponding hydroxy acids with turn over numbers ranging between 134 and 188. Based on mass spectra the mechanism of the catalytic process was proposed to proceed through the formation of hydroxo hydroperoxo intermediate, which is different from halo peroxidase reactions.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of molecular catalysis A:Chemical

ISSN

1381-1169

e-ISSN

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Svazek periodika

270

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

153-159

Kód UT WoS článku

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EID výsledku v databázi Scopus

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