Reduction of nitrite to NO at a mononuclear copper(II)-phenolate site
摘要:
Transformation of nitrite to nitric oxide at transition metal sites is of significant interest due to its biogeochemical and physiological relevance. This report illustrates the synthesis and structural characterization of a novel mononuclear nitritocopper(II) complex [L1]Cu(kappa(2)-O2N) supported by a tridentate ligand bearing pyrazole and phenolate moieties. Moreover, oxygen-atom-transfer (OAT) reactivity of nitrite anion at a copper(II) site in [L1]Cu(kappa(2)-O2N) is illustrated with a detailed kinetic analysis revealing the mechanism for the reduction of nitrite to nitric oxide. This result implies the possibility of copper(II) mediated oxygen-atom-transfer (OAT) reactivity of nitrite in the presence of oxophilic functionalities in the biological milieu.
of Cu2O nanomaterials and provide the first experimental evidence that the nanocrystals having different crystal facets within the same crystal system exhibit different activities toward S-nitrosothiols. We used various imaging techniques and time-dependent spectroscopic measurements to understand the nature of catalytically active species involved in the surface reactions. The denitrosylation reactions
Flash and Continuous Photolysis Studies of the Thionitrosyl Complex Cr(CH<sub>3</sub>CN)<sub>5</sub>(NS)<sup>2+</sup> and the Nitric Oxide Analogs: Reactions of Nitrogen Monosulfide in Solution
作者:Johannes W. Dethlefsen、Erik D. Hedegård、R. Dale Rimmer、Peter C. Ford、Anders Døssing
DOI:10.1021/ic8016936
日期:2009.1.5
Photolysis of the thionitrosylcomplex Cr(CH3CN)5(NS)2+ (1) in acetonitrile solution leads to the dissociation of nitrogen monosulfide (NS). In deaerated solution, this reaction is reversible, and flash photolysis studies demonstrate that NS reacts with Cr(CH3CN)62+ according to the rate law d[1]/dt = kon[Cr(CH3CN)62+][NS] (kon = 2.3 × 108 M−1 s−1 at 298 K). The photolysis of 1 in deaerated acetonitrile
This work deals with the synthesis, computational molecular modeling, and vibrational/electronic spectroscopic analysis of the coordination complex [Fe(DDTC)2]. The complex was synthesized according to the guidelines provided by the graphical method. The optimization of the molecular structure was performed using Density Functional Theory with the exchange functional B3LYP and basis set 6–311G(d,p)
Ferroptosis has emerged as a promising therapeutic approach for glioma. However, its efficacy is often compromised by the activated GPX4-reduced glutathione (GSH) system and the poor brain delivery efficiency of ferroptosisinducers. Therefore, suppression of the GPX4-GSH axis to induce the accumulation of lipid peroxides becomes an essential strategy to augment ferroptosis. In this study, we present