The cluster [CoAs(CO)] was obtained by pyrolysis of [CoAs(CO)]. The metal cage features a closed-packed core inside a Co/As shell that progressively deforms from a cubic face-centered symmetry. The redox and acid-base reactivities were determined by cyclic voltammetry and spectrophotometric titrations. The calculated electron density revealed the shell-constrained distribution of the atomic charges, induced by the presence of arsenic.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9937531 | PMC |
http://dx.doi.org/10.1021/acs.inorgchem.2c00506 | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Key Laboratory of MEMS of Ministry of Education, School of Integrated Circuits, Southeast University, Nanjing 210096, China.
Metal-semiconductor contact plays a significant role in devices such as transistors, photoemitters, and photodetectors. Here, the AuIn alloy contact gives a state-of-the-art low (contact resistance) in GeSe devices. The of GeSe-AuIn is measured to be 25 kΩ μm under channel carrier concentration around = 2.
View Article and Find Full Text PDFJACS Au
January 2025
Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zurich, Switzerland.
Hydrogenation of CO to methanol is foreseen as a key step to close the carbon cycle. In this study, we show that introducing Ga into silica-supported nanoparticles based on group 8-9 transition noble metals (M = Ru, Os, Rh, and Ir - Ga@SiO) switches their reactivity from producing mostly methane (sel. > 97%) to producing methanol (>50% CHOH/DME sel.
View Article and Find Full Text PDFPvHCt, a 23-amino acid long, histidine-rich peptide derived from shrimp, becomes strongly antimicrobial upon Cu(ii) ion binding. We describe Zn(ii) and Cu(ii) complexes of this peptide, aiming to understand how metal binding and structure correlates to biological activity. Using NMR, UV-vis, CD and FTIR spectroscopies, along with cyclic voltammetry, potentiometry, and DFT calculations, we demonstrate that Cu(ii) binds to the central and C-terminal regions of the peptide, inducing significant structural changes.
View Article and Find Full Text PDFJ Phys Chem Lett
January 2025
Institute for Sustainable Energy/Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China.
The migration of Zn ions is significantly more challenging compared to that of Li ions within the same crystalline framework, leading to poor rate performance of zinc-ion batteries (ZIBs). Compared to Li, the slower migration rate of Zn is vaguely attributed to the stronger electrostatic interaction induced by Zn. Herein, the rule of how the size of the migration channel and electrostatic interaction affect Zn and Li migration in α-VO has been systematically investigated by first-principle calculations.
View Article and Find Full Text PDFRedox Biol
January 2025
Free Radical and Radiation Biology Program, Department of Radiation Oncology, Holden Comprehensive Cancer Center, The University of Iowa College of Medicine, Iowa City, IA 52242, USA; Interdisciplinary Graduate Program in Human Toxicology, The University of Iowa, Iowa City, IA, 52242, USA.
Differences in cancer and normal cell oxidative metabolism provide a unique therapeutic opportunity for developing combined modality approaches with redox-active small molecules as radio-chemosensitizers that are well-tolerated by normal tissues. Pentaazamacrocyclic Mn (II)-containing (MnPAM) superoxide dismutase (SOD) mimetics and pharmacological ascorbate given IV to achieve [mM] plasma levels (pharmacological ascorbate: P-AscH‾) have been shown to act individually as cancer cell radio- and chemosensitizers via the generation of HOin vivo. The current study shows that the combination of newly developed MnPAM dismutase mimetic, rucosopasem manganese (RUC) with P-AscH‾ radio-sensitizes non-small cell lung cancer cells (NSCLC) and increases steady state levels of intracellular HO with no additional toxicity to normal human bronchial epithelial cells (HBECs).
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!