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
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