The controlled assembly of well-defined planar nanoclusters from molecular precursors is synthetically challenging and often plagued by the predominant formation of 3D-structures and nanoparticles. Herein, we report planar iron hydride nanoclusters from reactions of main group element hydrides with iron(II) bis(hexamethyldisilazide). The structures and properties of isolated Fe , Fe , and Fe nanoplatelets and calculated intermediates enable an unprecedented insight into the underlying building principle and growth mechanism of iron clusters, metal monolayers, and nanoparticles.
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http://dx.doi.org/10.1002/open.202000307 | DOI Listing |
ChemMedChem
December 2024
University of Puerto Rico Rio Piedras: Universidad de Puerto Rico Recinto de Rio Piedras, Chemistry, 17 University Avenue, 00925, San Juan, UNITED STATES OF AMERICA.
Deferasirox (Def), an orally administered iron-chelating drug, has drawn significant interest in repurposing for anticancer application due to the elevated Fe demand by cancer cells. But there are also concerns about its severe off target health effects. Herein Cu(II) binding is studied as a potential off target interaction.
View Article and Find Full Text PDFSmall
December 2024
School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300354, P. R. China.
NiFe-based materials, especially NiFe layered double hydroxides (LDHs), are recognized as the most promising non-precious metal electrocatalysts for alkaline oxygen evolution reaction (OER). However, the precisely designed distribution of active sites for enhancing activities is still significantly restricted due to the lack of reasonable modulation strategies. Herein, sulfur doped Ni/Fe gradient-distributed LDH (GD-NiFe LDH/S) is fabricated by facile air-induced strategy at room temperature.
View Article and Find Full Text PDFMaterials (Basel)
November 2024
Grupo Novos Materiais, CINTECX (Centro de Investigación en Tecnoloxía, Enerxía e Procesos Industriais), Universidade de Vigo, 36310 Vigo, Spain.
Hyperthermia is nowadays intensively investigated as a promising strategy to improve the therapeutic efficacy against different types of cancer and resistant infections. In particular, the remote generation of localized hyperthermia by magnetic field through iron-oxide nanoparticles (IONPs) offers good thermal conductivity in a controlled area. The incorporation of these IONPs in 3D-printed scaffolds designed for bone tissue regeneration has been scarcely addressed in the literature.
View Article and Find Full Text PDFMol Psychiatry
December 2024
Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA.
Developmental changes in prefrontal cortex (PFC) excitatory (glutamatergic, Glu) and inhibitory (gamma- aminobutryic acid, GABA) neurotransmitter balance (E:I) have been identified during human adolescence, potentially reflecting a critical period of plasticity that supports the maturation of PFC-dependent cognition. Animal models implicate increases in dopamine (DA) in regulating changes in PFC E:I during critical periods of development, however, mechanistic relationships between DA and E:I have not been studied in humans. Here, we used high field (7T) echo planar imaging (EPI) in combination with Magnetic Resonance Spectroscopic Imaging (MRSI) to assess the role of basal ganglia tissue iron-reflecting DA neurophysiology-in longitudinal trajectories of dorsolateral PFC Glu, GABA, and their relative levels (Glu:GABA) and working memory performance from adolescence to adulthood in 153 participants (ages 10-32 years old, 1-3 visits, 272 visits total).
View Article and Find Full Text PDFJ Comput Chem
January 2025
Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, Ontario, Canada.
The interaction between different metals (M), axial ligands (L), and ring substituents (R) in porphyrins was investigated using density functional theory. Different combinations of iron and cobalt as metal centers; imidazole, chlorine, and an n-heterocyclic carbene (NHC) as axial ligands, and unsubstituted, octaethyl-, and tetraphenyl-porphyrins were explored in their low, intermediate, and high-spin states, alongside oxygen affinity. Remarkably, the n-heterocyclic carbene enhanced the affinity of cobalt porphyrins to oxygen, with binding energies on average 4.
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