Article
Biochemistry & Molecular Biology
Helen M. O'Connor, Sergio Sanz, Aaron J. Scott, Mateusz B. Pitak, Wim T. Klooster, Simon J. Coles, Nicholas F. Chilton, Eric J. L. McInnes, Paul J. Lusby, Hogni Weihe, Stergios Piligkos, Euan K. Brechin
Summary: Three new heterometallic coordination cubes have been synthesized using a paramagnetic metalloligand and corresponding Ni-II salt, showing weak ferromagnetic interactions between Cr-III and Ni-II ions. These compounds expand the structurally related family of heterometallic cubes containing Cr-III and Ni-II ions, demonstrating a modular approach to building related polymetallic complexes.
Article
Chemistry, Physical
S. N. Sofronova, N. Kazak, E. Eremin, E. M. Moshkina, A. Chernyshov, A. F. Bovina
Summary: The sign reversal of both magnetization and exchange bias field was studied in polycrystalline Ni5.33Ta0.67B2O10, with different exchange bias effects observed at different temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Dinar Abdullin, Tobias Hett, Nico Fleck, Kevin Kopp, Simon Cassidy, Sabine Richert, Olav Schiemann
Summary: A trityl radical attached to a copper(II) tetraphenylporphyrin was synthesized and its magnetic properties were studied. It was found that the electron spin-spin coupling constant between the trityl and Cu2+ spin centers is ferromagnetic, and the distribution of this coupling constant was analyzed. The study highlights the importance of molecular dynamics for the magnetic properties of trityl-based systems.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Ceramics
Kungwan Kang, Jinho Byun, Mijung Jeen, Giryeon Jo, Youn-Kyoung Baek, Jaekwang Lee, Hyoungjeen Jeen
Summary: Polycrystalline M-type strontium hexaferrite was synthesized and the effect of sintering conditions on its physical properties was studied. The results showed that longer sintering time led to grain growth, decrease in coercive field, and changes in electrical properties.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Lu Xi, Chaoyi Jin, Hongwei Song, Xiaotong Wang, Junfang Xie, Yue Ma, Jinkui Tang, Licun Li
Summary: By utilizing imino nitroxide biradical, two series of Ln-radical complexes have been successfully constructed, with the coordination of copper(II) ion playing a critical role in the magnetic relaxation behavior of dysprosium ion.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Multidisciplinary Sciences
Yiyao Chen, George Yumnam, Jiasen Guo, Laura Stingaciu, Piotr Zolnierczuk, Valeria Lauter, Deepak K. Singh
Summary: Novel mechanism for spin-based electrical transport at macroscopic length is provided by emerging concepts such as magnetic charge dynamics in two-dimensional magnetic material. The demonstration of a substantial increase in electrical conductivity at room temperature due to sub-picosecond relaxation of magnetic charge defects in artificial magnetic honeycomb lattice points to untapped potential for spintronic applications in this system.
Article
Chemistry, Multidisciplinary
Jia Wang, Yu Jing, Ming-Mui Cui, Yi-Ming Lu, Zhongwen Ouyang, Chongyun Shao, Zhenxing Wang, You Song
Summary: Qubits are the basic unit of quantum information and computation. Research on molecule-based electron spin qubits has primarily focused on ions with a spin S=1/2, but recent studies have explored ions or systems with S>1/2 for quantum operations requiring qubit interaction. A 2D oxygen-coordinated oxamato supramolecular coordination framework was studied as a potential qubit carrier, demonstrating field-induced slow magnetic relaxation with a weak magnetic anisotropy. The system's relatively long decoherence time is attributed to its near isotropic nature and phonon bottleneck effect, with further improvement in qubit performance achieved through dilution.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Sergei Chapyshev, Enrique Mendez-Vega, Wolfram Sander
Summary: High-spin nitrenes have the largest magnetic anisotropy among C-, N-, and O-centered polyradicals, making them significant for exploring organic molecular magnetism and quantum information processing. While quintet and septet nitrenes were obtained nearly 50 years ago, experimental and theoretical studies on these reactive species have only recently become feasible due to advancements in molecular spectroscopy and computational chemistry. Dozens of quintet dinitrenes and septet trinitrenes have been successfully characterized using IR, UV/Vis, and EPR spectroscopy, offering valuable insights into their electronic structure, magnetic properties, and reactivity.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Tiancong Zhu, Alexander J. Bishop, Tong Zhou, Menglin Zhu, Dante J. O'Hara, Alexander A. Baker, Shuyu Cheng, Robert C. Walko, Jacob J. Repicky, Tao Liu, Jay A. Gupta, Chris M. Jozwiak, Eli Rotenberg, Jinwoo Hwang, Igor Zutic, Roland K. Kawakami
Summary: This study successfully synthesized vdW MnBi2Se4 crystals using nonequilibrium molecular beam epitaxy, revealing its easy-plane anisotropy and gapless surface state, making it a new material that remains a topological insulator above the magnetic-ordering temperature.
Article
Chemistry, Applied
Valerya Vorobeva, Denis Starichenko, Matvey Gruzdev, Ulyana Chervonova, Ruslan Zaripov, Aleksander Korolev
Summary: The magnetic features of mononuclear iron (III) complexes with tridentate Schiff base ligands were studied using different techniques. The results showed that these complexes have different spin centers and exhibit different magnetic behaviors at different temperatures. Additionally, antiferromagnetic exchange interactions between neighboring Fe (III) ions in the complexes were detected.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Rong Luo, Chen-Ze Xie, Ming-Guang Chen, Hai-Yan Shi, Xiang-Jian Kong, Yu-Hua Fan, Feng Shao
Summary: A new family of trinuclear windwheel complexes were synthesized and characterized. Magnetic studies revealed their antiferromagnetic behavior and different magnetic anisotropies.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Rouven F. Pfleger, Soeren Schlittenhardt, Marcel P. Merkel, Mario Ruben, Karin Fink, Christopher E. Anson, Jesper Bendix, Annie K. Powell
Summary: Three structurally related single ion Dy compounds were synthesized using the pentadentate ligand H(2)dapp. The arrangement of H(2)dapp and its interactions with anionic ligands and counterions were found to influence the electronic and magnetic structure of the compounds. Additionally, different anionic ligands were observed to affect the relaxation properties of the compounds.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
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
Summary: By synthesizing and studying a VIVO-CuII porphyrin dimer, we observed measurable exchange coupling and good spin coherence, making it suitable for operating two-qubit molecular spin-based quantum gates under various conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Bibek Prajapati, Duy-Khoi Dang, Piotr J. Chmielewski, Marcin A. Majewski, Tadeusz Lis, Carlos J. Gomez-Garcia, Paul M. Zimmerman, Marcin Stcpieit
Summary: The study presents a hexaradicaloid molecule with alternating Kekule and non-Kekule connectivities, showing a singlet ground state with significant hexaradicaloid character. It exhibits multiple thermally accessible high-spin states and undergoes two consecutive one-electron oxidations at low potentials. This design strategy provides a new approach for multistate spin switches and redox-amphoteric NIR dyes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Luca Muenzfeld, Milena Dahlen, Adrian Hauser, Nolwenn Mahieu, Senthil Kumar Kuppusamy, Jules Moutet, Maxime Tricoire, Ralf Koeppe, Leo La Droitte, Olivier Cador, Boris Le Guennic, Gregory Nocton, Eufemio Moreno-Pineda, Mario Ruben, Peter W. Roesky
Summary: The solvation of [(CNT)Ln(eta(8)-COT)] complexes with tetrahydrofuran (THF) can lead to neutral and ionic species in a solid-to-solid transformation. These species exhibit switchable luminophores and single-molecule magnet properties due to the distortion caused by solvation. The desolvation of the coordinated solvents can be achieved through a dynamic vacuum or temperature gradient stimulus. Raman spectroscopic investigations confirm the fast and reversible solvation and desolvation processes, and a Nd:YAG laser is found to induce a spatially resolved self-sufficient switching process for the Ce(III) analogue.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Lucia Martin-Perez, Samara Medina Rivero, Manuel Vazquez Sulleiro, Alicia Naranjo, I. Jennifer Gomez, Maria Luisa Ruiz-Gonzalez, Andres Castellanos-Gomez, Mar Garcia-Hernandez, Emilio M. Perez, Enrique Burzuri
Summary: The recent development of magnetic layered van der Waals (vdW) materials has provided a platform to study exotic magnetism in two-dimensional (2D) limit. However, conventional magnetometry techniques are not suitable for directly probing the magnetic properties of 2D flakes, especially antiferromagnetic ones. In this study, an alternative approach using liquid-phase exfoliation (LPE) method was employed to obtain few-layer FePS3 flakes, which were then measured using a conventional SQUID magnetometer. The results showed direct magnetic evidence of the antiferromagnetic transition in the few-layer flakes, with a reduction in Neel temperature as the flake thickness decreased.
Article
Chemistry, Multidisciplinary
Lorenzo Tesi, Friedrich Stemmler, Mario Winkler, Sherri S. Y. Liu, Saunak Das, Xiuming Sun, Michael Zharnikov, Sabine Ludwigs, Joris van Slageren
Summary: The development of quantum technologies aims to achieve exponentially faster computations, ultrahigh performance sensing, and a comprehensive understanding of many-particle quantum systems. Molecular spins have emerged as excellent candidates for qubits due to their long coherence times, tunability through chemical synthesis, and compatibility with other quantum platforms. However, integrating molecular spin qubits into quantum devices and preserving their quantum properties on surfaces remains a challenge. This study presents a versatile bottom-up approach to arrange molecular qubits as self-assembled monolayers on surfaces, demonstrating the maintenance or even enhancement of qubit properties.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Marjan Hosseinzadeh, Sergio Sanz, Jan van Leusen, Natalya V. Izarova, Euan K. Brechin, Scott J. Dalgarno, Paul Koegerler
Summary: Phosphate ester bonds are stable in nature and can be isolated using a combination of phosphoryl and calix[4]arene moieties. In this study, hydrolyzed phosphoryl-calix[4]arene ligands were formed through Ln(III)-mediated P-OEt bond cleavage in L-PO. The resulting Ln(III) species were trapped as dimers, and the Dy derivative exhibited slow magnetization relaxation. This strategy can be further applied to create a broader range of hydrolyzed platforms that mimic nuclease enzymes.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Maria Jose Heras Ojea, Claire Wilson, Jordi Cirera, Hiroki Oshio, Eliseo Ruiz, Mark Murrie
Summary: A new family of 3d-4f complexes with an unusual four-blade propeller topology containing four Cu centers is designed using the multinucleating ligand H6L. The coordination of four {Cu(H4L)} units around the central Ln ion is achieved by using Cl- and ClO4- as co-ligands. Magneto-structural analysis reveals that the geometric arrangement of the Cu(ii) centers defined by the H4L2- ligands controls the magnetic communication between the different metal centers.
DALTON TRANSACTIONS
(2023)
Article
Physics, Applied
Gabriele Clemente, Massimo Moret, Andres Granados del Aguila, Muhammad Hussain, Zdenek Sofer, Jiayuan Zhou, Xue Liu, Marco Fanciulli, Fabrizio Moro
Summary: In this study, the electron spin resonance (ESR) properties of a van der Waals bulk CrBr3 single crystal were investigated. Angular- and temperature-dependent experiments were conducted in the range of the critical temperature for ferromagnetic order. The results revealed a strong uniaxial magnetic anisotropy constant and the occurrence of long wavelength spin fluctuations. The findings have implications for the potential application of CrBr3 in perpendicular magnetic tunneling junctions.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Sergio Martinez-Losa del Rincon, Ignacio Gimeno, Jorge Perez-Bailon, Victor Rollano, Fernando Luis, David Zueco, Maria Jose Martinez-Perez
Summary: By optimizing the geometry of the electromagnetic cavity and the ferromagnet, coherent exchange of information between cavity photons and ferromagnetic spin excitations can be achieved at high speeds. The fundamental frequency of the magnonic resonator is also influenced by the geometry of the ferromagnet. Experimental results show that the light-matter coupling strength can be estimated using open transmission lines or resonant cavities, with good agreement between the two methods. A theoretical framework based on electromagnetic and micromagnetic simulations successfully explains the experimental results.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Euan K. Brechin, Jurgen Schnack, Marco Evangelisti, Constantinos J. Milios, Thomais G. Tziotzi, David Gracia, Scott J. Dalgarno
Summary: Reaction of Gd(OAc)3 center dot 4H2O, salicylaldehyde, and CH3ONa in MeCN/MeOH leads to the formation of [Gd12Na6(OAc)25(HCO2)5(CO3)6(H2O)12]center dot 9H2O.0.5MeCN (1 center dot 9H2O.0.5MeCN), which exhibits a quadruple-wheel structure composed of two {Na3} and two {Gd6} rings. The magnetic properties of 1 show weak antiferromagnetic interactions between GdIII ions, resulting in a record magnetocaloric effect at low magnetic fields and temperatures. The magnetic entropy change reaches -Delta Sm= 29.3 J kg-1 K-1 for full demagnetization from B = 1 T at T = 0.5 K.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Enrique Burzuri, Maria Jose Martinez-Perez, Carlos Marti-Gastaldo, Marco Evangelisti, Samuel Manas-Valero, Eugenio Coronado, Jesus I. Martinez, Jose Ramon Galan-Mascaros, Fernando Luis
Summary: In this article, a novel 2D heterometallic oxalate complex is presented as a potential candidate for quantum spin liquid (QSL) material. It exhibits strong antiferromagnetic correlations and the absence of magnetic ordering, making it an appealing QSL candidate.
Article
Chemistry, Multidisciplinary
Mousumi Biswas, Athanasios Mavromagoulos, Mark Murrie, Debashis Ray
Summary: A unique family of heptanuclear 3d-4f complexes has been synthesized using a Schiff-base H2L and a solvent mixture, and their magnetic interactions have been studied. Single-crystal X-ray diffraction revealed the coordination aggregates grown around a unique mu(4)-O2- unit connecting four lanthanide ions. The magnetic studies in the solid state showed weak antiferromagnetic interactions between the 3d and 4f ions.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Lucinda R. B. Wilson, Marco Coletta, Mukesh K. Singh, Simon J. Teat, Adam Brookfield, Muralidharan Shanmugam, Eric J. L. McInnes, Stergios Piligkos, Scott J. Dalgarno, Euan K. Brechin
Summary: The reaction of 2,2'-bis-p-Bu-t-calix[4]arene (H8L) with Cu(NO3) (2)center dot 3H(2)O and N-methyldiethanolamine (MedeaH(2)) in a basic dmf/MeOH mixture results in the formation of [Cu-II (16)(L)(2)(Me-dea)(4)(mu(4)-NO3)(2)(mu-OH)(4)(dmf)(3.5)(MeOH)(0.5)(H2O)(2)] (H6L)center dot 16dmf center dot 4H(2)O (4). The metallic skeleton of the compound consists of a tetracapped square prism, [Cu-12], with Cu-II ions housed in the calix[4]arene polyphenolic pockets. Magnetic measurements show antiferromagnetic exchange interactions and a ground state of S = 1, while EPR indicates a large zero-field splitting.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Ryan Phelps, Alvaro Etcheverry-Berrios, Euan K. Brechin, J. Olof Johansson
Summary: Ultrafast transient absorption spectra were recorded for [MnIII(cyclam)(H2O)(OTf)][OTf]2 in water to study the equatorial expansion restriction after dxy-dz2 electronic transition. Strong oscillations in the excited state absorption signal were attributed to an excited state wavepacket. The structural rigidity of the cyclam ligand causes a complex reaction coordinate with certain frequencies, leading to a shorter compressed-state lifetime. Complementary density functional theory quantum chemistry calculations support the successful restriction of the wavepacket motion.
Article
Chemistry, Multidisciplinary
Thomais G. Tziotzi, David Gracia, Scott J. Dalgarno, Juergen Schnack, Marco Evangelisti, Euan K. Brechin, Constantinos J. Milios
Summary: The reaction of Gd(OAc)3 center dot 4H2O, salicylaldehyde, and CH3ONa in MeCN/MeOH yielded [Gd12Na6(OAc)25(HCO2)5(CO3)6(H2O)12]center dot 9H2O.0.5MeCN, which consists of a quadruple-wheel composed of two {Na3} and two {Gd6} rings. The magnetic properties of this compound exhibit weak antiferromagnetic interactions between GdIII ions, resulting in a record magnetocaloric effect at low temperatures and applied magnetic fields. The magnetic entropy change reaches -Delta Sm= 29.3 J kg-1 K-1 for full demagnetization at T = 0.5 K from B = 1 T.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Avik Bhanja, Sangeeta Roy Chaudhuri, Angelos B. Canaj, Shachi Pranjal Vyas, Fabrizio Ortu, Lucy Smythe, Mark Murrie, Ritobrata Goswami, Debashis Ray
Summary: Two new paths for coordination driven self-assembly reactions have been discovered using 2-((1-hydroxy-2-methylpropan-2-ylimino)methyl)-6-methoxyphenol (H2L) as a supporting ligand. The reaction procedure revealed the importance of HO- and Cl- ions in the mineral-like growth of the complexes derived from solvents and metal ion salts.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Dennis Schaefter, Jonathan Wischnat, Lorenzo Tesi, J. Alejandro De Sousa, Edmund Little, Jake McGuire, Marta Mas-Torrent, Concepcio Rovira, Jaume Veciana, Floriana Tuna, Nuria Crivillers, Joris van Slageren
Summary: In this article, the spin dynamics of chlorinated triphenylmethyl organic radicals were investigated, revealing long ensemble coherence times and the achievement of two-qubit and individual qubit addressability in the biradical system. These results highlight the potential of molecular materials in the development of quantum architectures.
ADVANCED MATERIALS
(2023)
