Redox activation of small molecules at biological metal centers

R Silaghi-Dumitrescu - Applications of Density Functional Theory to …, 2013 - Springer
Some recent applications of density functional theory (DFT) are described and specifically
the review addresses the activation of small molecules such as water, molecular oxygen and …

DFT and the electromerism in complexes of iron with diatomic ligands

R Silaghi-Dumitrescu, I Silaghi-Dumitrescu - Journal of inorganic …, 2006 - Elsevier
A reliable procedure is proposed for assigning the electronic structures for large biologically-
relevant systems, where the size of the model confines one to the use of density functional …

[PDF][PDF] Corrosion inhibition efficiency of quinoxalines based on electronic structure and quantum computational analysis

DM Mamand, HM Qadr - Revue Roumaine de Chimie, 2023 - revroum.lew.ro
Based on the quantum chemical parameters obtained from density functional theory (DFT)
with 6-311++ G (d, p) basis set at B3LYP level, a theoretical study of the corrosion inhibition …

Siroheme‐containing sulfite reductase: A density functional investigation of the mechanism

R Silaghi‐Dumitrescu… - International Journal of …, 2012 - Wiley Online Library
Siroheme‐containing sulfite reductases (SiR) catalyze the six‐electron reduction of sulfite to
sulfide via a mechanism involving sulfite binding at the heme iron. The exact sequence in …

Transient species involved in catalytic dioxygen/peroxide activation by hemoproteins: possible involvement of protonated Compound I species

R Silaghi-Dumitrescu, CE Cooper - Dalton Transactions, 2005 - pubs.rsc.org
Interaction of hemoproteins with peroxide leads in several cases to transient formation of
ferric peroxo, ferric hydroperoxo, and “high-valent”, formally Fe (V), oxo or hydroxo …

A density functional study of heme–peroxynitrite adducts

R Silaghi-Dumitrescu - Journal of Molecular Structure: THEOCHEM, 2005 - Elsevier
The geometries of several possible isomers (N-bonded, O-bonded, protonated,
deprotonated) of ferrous and ferric heme–peroxynitrite adducts are examined with density …

O–S Bond Activation in Structures Isoelectronic with Ferric Peroxide Species Known in O–O‐Activating Enzymes: Relevance for Sulfide Activation and Sulfite …

M Surducan, SV Makarov… - European Journal of …, 2014 - Wiley Online Library
The interactions of H2S with FeIVO porphyrin radical‐cation structures and of peroxide‐like
H2OS systems with ferric heme have been investigated by DFT. The data are relevant for the …

Electromerism and linkage isomerism in biologically-relevant FeSO complexes

M Surducan, D Lup, A Lupan, SV Makarov… - Journal of Inorganic …, 2013 - Elsevier
Sulfur monoxide, SO, is a relatively unstable molecule whose metal-coordinating properties
have received little attention in bioinorganic chemistry. Reported here is a density functional …

Halide activation by heme peroxidases: theoretical predictions on putative adducts of halides with Compound I

R Silaghi‐Dumitrescu - 2008 - Wiley Online Library
The first density functional theory (DFT) results on models of the putative FeIII–OX and FeIII–
HOX (X= halogen) adducts of chloroperoxidase (CPO) and myeloperoxidase (MPO) are …

Computational investigation of the initial two-electron, two-proton steps in the reaction mechanism of hydroxylamine oxidoreductase

AAA Attia, R Silaghi-Dumitrescu - The Journal of Physical …, 2014 - ACS Publications
Reported here is a computational study based on density functional theory that presents the
first attempt to investigate the 2-electron 2-proton reaction of Fe (III)–H2NOH to Fe (III)–HNO …