Results 11 to 20 of about 23,032 (162)

Nutation Spectroscopy of a Weakly Interacting Heterobimetallic Spin System. [PDF]

Chemistry
An heterobimetallic VIV−CuII complex is synthesized by a modular process involving external coordination sites of a porphyrinato ligand and a PdII linker. Pulsed Electron Paramagnetic Resonance experiments, in particular spin nutation spectroscopy at variable microwave powers or magnetic fields, reveals weak but non‐negligible magnetic interactions and
Appleton JL, Le Breton N, Choua S, Ruppert R, Boudalis AK.   +4 more
europepmc   +2 more sources

Conclusive Insight into the Coordination Complexes of a Flexible Bis(β-diketonato) Ligand and Their Phase-Dependent Structure: A Multi-Technique Approach. [PDF]

Chemistry
Complexes of flexible bis(β‐diketonato) ligand bdhb2− are dimeric in the crystalline state but rearrange to monomeric in organic solution. The transformation, first detected on paramagnetic VO2+ and Co2+ derivatives, is conclusively proved through the preparation of diamagnetic [Zn2(bdhb)2(py)2] and its investigation by high‐resolution 1H NMR ...
Imperato M, Nicolini A, Mironova O, Benassi E, Demitri N, Gigli L, Mucci A, Cornia A.   +7 more
europepmc   +2 more sources

A Heterometallic Porphyrin Dimer as a Potential Quantum Gate: Magneto‐Structural Correlations and Spin Coherence Properties

Angewandte Chemie, Volume 135, Issue 48, November 27, 2023., 2023
Electron paramagnetic resonance (EPR) shows that a vanadyl‐copper meso‐meso linked bisporphyrin complex has good spin coherence and a sizeable magnetic exchange interaction, making it suitable for operating two‐qubit molecular spin‐based quantum gates over a wide range of operation conditions.
Davide Ranieri, Alberto Privitera, Fabio Santanni, Karolina Urbanska, Grant J. Strachan, Brendan Twamley, Enrico Salvadori, Yu‐Kai Liao, Mario Chiesa, Mathias O. Senge, Federico Totti, Lorenzo Sorace, Roberta Sessoli   +12 more
wiley   +2 more sources

Impact of Asphaltenes on the Adsorption Behavior of Petroleum Vanadyl Porphyrins: Kinetic and Thermodynamic Aspects

, 2021
In the present work, the first data on the adsorption behavior of petroleum vanadyl porphyrins in the presence and absence of asphaltenes are afforded. As adsorptives, N,N′-dimethylformamide extract of asphaltenes containing 9.88 wt % vanadyl porphyrins ...
Svetlana Yakubova (11279069), Svetlana Yakubova, Dmitry Milordov, Makhmut Yakubov, Guzalia Abilova (11279066), Nikolay Mironov (11279054), Nikolay Mironov, Damir Tazeev, Damir Tazeev (11279063), Dmitry Milordov (11279057), Guzalia Abilova, Makhmut Yakubov (11279072), Elvira Tazeeva (11279060), Elvira Tazeeva   +13 more
core   +1 more source

Non-Destructive Analysis of Mummification Balms in Ancient Egypt, Based on EPR of Vanadyl and Organic Radical Markers of Bitumen [PDF]

, 2020
The black matter employed in funeral context by ancient Egyptian is a complex mixture of plant-based compounds with variable amounts of bitumen. Asphaltene, the most resistant component of bitumen, contain Vanadyl porphyrins and carbonaceous radicals ...
Hitomi, Fujii, Charles-Emmanuel, Dutoit, Laurent, Binet, Didier, Gourier, Agnes, Lattuati-Derieux   +4 more
core   +2 more sources

Axial Ligand Coordination in Sterically Strained Vanadyl Porphyrins: Synthesis, Structure, and Properties

, 2016
A hitherto unknown family of six-coordinate vanadyl porphyrins of the sterically crowded, nonplanar 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetranitroporphyrin incorporating axial ligand L [where L is pyridine, tetrahydrofuran (THF), or methanol (MeOH)]
Sudip Kumar Ghosh (1881037), Sankar Prasad Rath (1655494), Ranjan Patra (1984582)   +2 more
core   +4 more sources

Large Faraday Rotation in Liquid Crystals With Embedded Paramagnetic Ions (Cu2+, VO2+) at Room Temperature

Advanced Optical Materials, Volume 14, Issue 28, 24 July 2026.
Large Faraday rotation at room temperature is observed in thin films of discotic copper (Cu2+: 3d9) and vanadyl (VO2+: 3d1) enaminoketone complexes. The large Verdet constant originates from a high density of paramagnetic centers, metal‐ligand p−d hybridization and π orbitals involved in optical transitions (identified by DFT calculations), as well as ...
Karolina Łempicka‐Mirek, Adam Krówczyński, Mateusz Król, Nevill Gonzalez Szwacki, Paulina Rybak, Damian Pociecha, Paweł W. Majewski, Barbara Piętka, Jacek Szczytko   +8 more
wiley   +1 more source

Selective Adsorption of Vanadyl Porphyrin on Solid Adsorbent in the Presence of Polycyclic Aromatic Hydrocarbon: Kinetics, Equilibrium, and Thermodynamic Studies

Chemistry
The presence of vanadium compounds in heavy oils poses a significant challenge by poisoning and deactivating refining catalysts, making their removal an essential processing step.
Xiu Chen, Chen Huang, Haidong Li, Suoqi Zhao, Linzhou Zhang   +4 more
doaj   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, Volume 36, Issue 15, 19 February 2026.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

A Triple‐Catalytic, Fully Biogenic Synthesis of Cyclic Carbonates

ChemSusChem, Volume 19, Issue 1, January 2026.
A three‐step synthesis of cyclic carbonates from biogenic resources (fatty acids, O2, CO2) is reported. The process operates via a visible light‐mediated hydrocarbon oxidation, with an overall 100% atom‐economy, in the presence of easily accessible catalysts (porphyrin, VO(acac)2, pyridine) but without intermediate work‐up procedures.
Robin Stuhr, Leon Liu, Axel Jacobi von Wangelin   +2 more
wiley   +1 more source