Electronic Properties, Redox Behavior, and Interactions with H2O2 of pH-Sensitive Hydroxyphenyl-1,2,4-triazole-Based Oxovanadium(V) Complexes
| Autor: | Browne, WR, Ligtenbarg, AGJ, de Boer, JW, van den Berg, TA, Lutz, M, Spek, AL, Hartl, F, Hage, R, Feringa, BL, Spek, Anthony L., Feringa, Bernard |
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| Přispěvatelé: | Molecular Inorganic Chemistry, Synthetic Organic Chemistry, Stratingh Institute of Chemistry, R¿ntgenparticipatieprogramma, Dep Scheikunde, Homogeneous and Supramolecular Catalysis (HIMS, FNWI) |
| Rok vydání: | 2006 |
| Předmět: |
Models
Molecular Magnetic Resonance Spectroscopy Inorganic chemistry Vanadium chemistry.chemical_element Electrons Methoxide Crystallography X-Ray Ligands VANADIUM BROMOPEROXIDASE Medicinal chemistry Redox Sensitivity and Specificity law.invention Inorganic Chemistry chemistry.chemical_compound HYDROGEN-PEROXIDE law ASYMMETRIC OXIDATION Electrochemistry Organometallic Compounds PEROXOVANADIUM COMPLEXES Reactivity (chemistry) CRYSTAL-STRUCTURE Physical and Theoretical Chemistry Electron paramagnetic resonance LIFETIME CATECHOL DIOXYGENASES Molecular Structure Ligand SCHIFF-BASE LIGANDS Electron Spin Resonance Spectroscopy SPECTROSCOPIC CHARACTERIZATION 1 2 4-Triazole Stereoisomerism Hydrogen Peroxide Hydrogen-Ion Concentration Triazoles chemistry DIOXOVANADIUM(V) COMPLEXES Spectrophotometry Ultraviolet Vanadates Vanadium bromoperoxidase Oxidation-Reduction CATALYZED OXIDATION |
| Zdroj: | Inorganic Chemistry, 45(7), 2903-2916. AMER CHEMICAL SOC Inorganic Chemistry, 45(7), 2903-2916. American Chemical Society Inorganic Chemistry, 45, 2903. American Chemical Society |
| ISSN: | 0020-1669 |
| Popis: | The syntheses and spectroscopic characterization of two 1,2,4-triazole-based oxovanadium(V) complexes are reported: 1(-)[VO(2)L1](-) and 2 [(VOL2)(2)(OMe)(2)] (where H(2)L1 = 3-(2'-hydroxyphenyl)-5-(pyridin-2"-yl)-H-1-1,2,4-triazole, H3L2 = bis-3,5-(2'-hydroxyphenyl)-1H-1,2,4-triazole). The ligand environment (N,N,O vs O,N,O) is found to have a profound influence on the properties and reactivity of the complexes formed. The presence of the triazolato ligand allows for pH tuning of the spectroscopic and electrochemical properties, as well as the interaction and stability of the complexes in the presence of hydrogen peroxide. The vanadium(IV) oxidation states were generated electrochemically and characterized by UV-vis and EPR spectroscopies, For 2, under acidic conditions, rapid exchange of the methoxide ligands with solvent [in particular, in the vanadium(IV) redox state] was observed. |
| Databáze: | OpenAIRE |
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