Review
Chemistry, Inorganic & Nuclear
Valerie Waser, Thomas R. Ward
Summary: This review examines the effect of aqueous media on the stability and redox chemistry of biomimetic analogs and artificial [Fe4S4] proteins.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Mae Feo, Nikki J. Bakas, Aleksa Radovic, William Parisot, Anne Clisson, Lise-Marie Chamoreau, Mansour Haddad, Virginie Ratovelomanana-Vidal, Michael L. Neidig, Guillaume Lefevre
Summary: In this work, the design of stable iron(0) complexes with a phenanthroline-type ligand (phen) for cycloaddition catalysis is explored. The utilization of phen ligand in reduced iron oxidation states is challenging due to its strong noninnocence, resulting in unstable species. However, by strategically protecting the C4 and C7 positions of the phen ring, a stable (N,N)2Fe complex is obtained, which exhibits excellent thermal and kinetic stability and can be easily used as a precursor in catalytic processes. The electronic structure and catalytic activity of this noninnocent complex in alkyne [2 + 2 + 2] cyclizations are discussed.
Review
Chemistry, Inorganic & Nuclear
Anne Vessieres, Yong Wang, Michael J. McGlinchey, Gerard Jaouen
Summary: Organometallic quinone methides (OM-QMs) exhibit unique chemical and biological properties when incorporated into specific substrates like ferrocifens, leading to disruption of cancer cell metabolism and cytotoxicity. Among these, ferrocifens show the highest toxicity within the iron, ruthenium, osmium triad, and the complexes can be utilized as imaging probes.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Inorganic & Nuclear
Aleksandra Tobolska, Nina E. Wezynfeld, Urszula E. Wawrzyniak, Wojciech Bal, Wojciech Wroblewski
Summary: Electrochemical and spectroscopic studies showed that the N-truncated amyloid beta peptide A β(5-9) containing histidine at position 2 formed ternary complexes with copper(ii) and phosphate anions or groups. The recognition ability of Cu(ii)-A β(5-9) towards phosphate species opens up new possibilities for designing phosphate-selective molecular receptors.
DALTON TRANSACTIONS
(2021)
Article
Biochemistry & Molecular Biology
Meng Li, Razieh Mirshafian, Jining Wang, Harini Mohanram, Kollbe Ando Ahn, Shayan Hosseinzadeh, Konstantin V. Pervushin, J. Herbert Waite, Jing Yu
Summary: Polyelectrolyte coacervates play a crucial role in the formation of load-bearing macromolecular materials in living organisms and industrial material fabrication. However, the study of their useful attributes is challenging due to the metastability of coacervate colloidal droplets and the lack of suitable analytical methods. By using solution electrochemistry and nuclear magnetic resonance measurements, it is found that coacervates can act as solvent media for low-molecular-weight catechols. Catechols preferentially partition into the coacervate phase and the coacervates stabilize catechol redox potentials, suggesting their potential for isolating redox-unstable chemicals.
Article
Chemistry, Physical
Daniel Bim, Anastassia N. Alexandrova
Summary: Heme-iron oxidoreductases rely on the intramolecular electric fields exerted by the protein hosts to control enzyme specificity in redox reactions. The direction and magnitude of the electric fields at the active sites vary depending on the axial ligands, affecting the reactivity and selectivity of these enzymes. This study highlights the crucial role of protein scaffolds and axial ligands in modulating heme-iron chemistry.
Article
Chemistry, Multidisciplinary
Youngsuk Kim, Arun Sridharan, Daniel L. M. Suess
Summary: This study reports the synthesis of a three-member series of isostructural mononitrosylated [Fe4S4] clusters and reveals the significance of mononitrosylated intermediates in NO sensing/signaling.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Geosciences, Multidisciplinary
Eli K. Moore, Alex Ostroverkhova, Daniel Hummer, Shaunna Morrison, Yarissa Peralta, Stephanie J. Spielman
Summary: The mineral record reveals the changing redox conditions of Earth's crust and the availability of critical elements for life. Transition metal elements, such as iron, which are important for enzymes, can be tracked through preserved mineral chemistry. This study investigates the mineral chemistry of iron over geologic time using a new analysis platform. The findings show the increasing importance of oxygen abundance in the atmosphere and its influence on the diversity of iron minerals.
PRECAMBRIAN RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Joseph W. Ziller, William J. Evans
Summary: In this study, the U(v) imido complex 1 was observed for the first time by crystallography, providing new insights into the reaction mechanisms of U(III) compounds with azide reagents.
DALTON TRANSACTIONS
(2022)
Article
Engineering, Environmental
Li-Zhi Huang, Xuejie Zhang, Ru Liu, Liping Fang
Summary: The reductive dissolution of ferric (hydr)oxide-phosphate complex is believed to be responsible for P release under anoxic conditions. Our results demonstrate that the increased redox potential introduced by oxidants leads to the release of P from the GR-P complex, which deepens our understanding of the relationship between redox potential and the P fixation by iron-bearing minerals.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Callum R. Woof, Derek J. Durand, Natalie Fey, Emma Richards, Ruth L. Webster
Summary: The catalytic mechanism of iron-catalyzed alkene isomerization reaction was studied through a combination of experimental and theoretical approaches. The results suggest that the isomerization of alkenes can be achieved through the combination of a hydride source and an iron(II) beta-diketiminate pre-catalyst.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Chien-Wei Chiang, Kai-Wun Jhang, Jeng-Lung Chen, Liang-Ching Hsu, Wei-Hsiang Huang, Hung-Chi Chen, Ting-Jun Lin, Ci-Yang Sun, Yu-Ning Li
Summary: In this study, a bioinspired {Co(NO)(2)}(10) complex 1 was developed for S-nitrosation of Cys residues. By incorporating a ferrocenyl group, the nitrosation reaction was fine-tuned using the redox ability of Cys residues. Complex 1 was synthesized and characterized, showing its NO translation reactivity. Moreover, complex 1 successfully converted Cys into S-nitrosocysteine (Cys-SNO), as confirmed by UV-Vis, IR, and XAS spectroscopy. This study presents a promising approach for further exploration in the modification of Cys-containing peptides.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Egor Koemets, Timofey Fedotenko, Saiana Khandarkhaeva, Maxim Bykov, Elena Bykova, Marcel Thielmann, Stella Chariton, Georgios Aprilis, Iuliia Koemets, Konstantin Glazyrin, Hanns-Peter Liermann, Michael Hanfland, Eiji Ohtani, Natalia Dubrovinskaia, Catherine McCammon, Leonid Dubrovinsky
Summary: The study found that goethite decomposes into oxygen-rich fluid and different iron oxides under high-pressure and high-temperature conditions. Goethite, formed from about 3.8 billion years ago until 2.2 billion years ago, was transported into the mantle through plate tectonics.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Samuel M. M. Bhutto, Brandon Q. Q. Mercado, Patrick L. L. Holland
Summary: In this study, the capability of iron(I) alkynyl complexes to bind N-2 was explored and a crystal structure of an iron(I) alkynyl complex with N-2 was obtained. It was further demonstrated that the alkynyl ligand is resistant to migration possibly due to the high Fe-C bond energy.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sebastian Martinez-Vivas, Dmitry G. Gusev, Macarena Poyatos, Eduardo Peris
Summary: We report a rhodium(I) complex with modulable electronic nature through supramolecular and redox stimuli. The complex shows strong pi-pi-stacking interaction with coronene, affecting its electron-richness. Addition of tetrabutylammonium fluoride sequentially reduces the ligand's NDI moiety, enhancing its electron-donor strength. The complex's catalytic activity in the cycloisomerization of alkynoic acids can be modulated by the addition of fluoride, resulting in four levels of activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
