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Probing Magnetism in Self-Assembled Organometallic Complexes Using Kondo Spectroscopy.
ACS Nano
January 2025
Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany.
Article Synopsis
- Control of individual atomic spins is essential for advancements in spintronics, quantum sensing, and quantum information processing, with scanning tunneling microscopy (STM) being a effective tool for manipulation.
- The research presents a new method for self-assembling magnetic organometallic complexes using iron atoms and specific molecules (Cu(dbm) and FePc) on a silver substrate, effectively forming complexes that mimic metallocenes.
- Magnetic properties of these complexes show a notable Kondo effect, which is explained through density functional theory calculations indicating that the interaction between Fe 3d-orbitals and benzene π-orbitals enhances Kondo screening, offering insights for designing hybrid organometallic systems.
Combination of Phenylsilsesquioxane and Acetate Ligands as an Approach to a Record High Nuclear CuNa-Cage. Synthesis, Unique Structure, and Catalytic Activity.
Chemistry
December 2024
Centro de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
Self-assembly synthesis of mixed-ligand (silsesquioxane/acetate) complex allows to isolate record high nuclear copper(II) Cu-cage (1). In the presence of two additional sodium ions, a unique molecular architecture, with triple combination of ligands (cyclic and acyclic silsesquioxanes as well as acetates), has been formed. The structure was established by single-crystal X-ray diffraction based on the use of synchrotron radiation.
View Article and Find Full Text PDFGram-Scale, One-Pot Synthesis of a Cofacial Porphyrin Bridged by Ortho-xylene as a Scaffold for Dinuclear Architectures.
Inorg Chem
November 2024
Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York14260, United States.
Article Synopsis
- The reaction of four 1,2-dibromoxylenes with two tetra-3-pyridylporphyrins resulted in the creation of a metal-free organic nanocage (oNC) that was produced in a highly efficient 91.5% yield.
- The synthesized oNC was subsequently metalated with cobalt(II), copper(II), and nickel(II) ions to produce dinuclear complexes, which were characterized using various analytical techniques such as mass spectrometry and X-ray diffraction.
- The cofacial cobalt porphyrins showed significant potential as catalysts for the Oxygen Reduction Reaction, demonstrating high selectivity for producing hydroxyl during electrochemical processes, while the robust architecture of the oNC allows for potential applications with
An ionic CuNa-phenylsilsesquioxane/bis(triphenylphosphine)iminium complex: synthesis, unique structure, and catalytic activity.
Nanoscale
October 2024
Centro de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
The synthesis of a high nuclear (CuNa) complex 1 the self-assembly of copper(II) phenylsilsesquioxane induced by complexation with bis(triphenylphosphine)iminium chloride (PPNCl) was successfully achieved. This complex, which includes two bis(triphenylphosphine)iminium PPN cations, represents the first example of a metallasilsesquioxane/phosphazene compound. The CuNa-silsesquioxane cage demonstrates a nontrivial combination of two pairs of Si-cyclic/Si-acyclic silsesquioxane ligands and a fusion of two SiCuNa fragments, combined the central ninth copper ion.
View Article and Find Full Text PDFCarrier-free nanoparticles based on self-assembly of 5-FU and copper-genistein complexes for the combined treatment of hepatocellular carcinoma.
Drug Deliv Transl Res
August 2024
Institute of Pharmacy & Pharmacology, University of South China, Hengyang, Hunan, China.
5-Fluorouracil (5-FU) is commonly used as a chemotherapeutic drug for advanced HCC. However, the effectiveness of 5-FU is limited by the emergence of resistance and poor targeting efficiency. Combining 5-FU with natural compounds has shown promise in HCC treatment.
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