Article
Chemistry, Multidisciplinary
Lewis R. Thomas-Hargreaves, David Hunger, Michal Kern, Ashley J. Wooles, Joris van Slageren, Nicholas F. Chilton, Stephen T. Liddle
Summary: In this study, the synthesis of a lanthanide-(bis)boryloxide complex with idealized D-4h@Dy(iii) point-group symmetry was reported. The complex exhibits single-molecule magnetism with one of the highest energy barriers among six-coordinate lanthanide-SMM systems. The validation of electrostatic model predictions by complex 2Dy informs future design of lanthanide-SMMs.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Lu Zhang, Jin Xiong, Yin-Shan Meng, Tao Liu
Summary: Five mononuclear compounds were synthesized by combining cyclopentadiene, β-diketonate, tripyrazoylborate ligands, and dysprosium ion. Magnetic studies revealed that compounds 1Dy and 3Dy exhibited typical butterfly-type hysteresis, while compounds 1Dy-4Dy showed magnetic relaxation governed by the Orbach and Raman processes. Compound 3Dy showed a two-step magnetic relaxation attributed to the static disordering of the coordinated THF molecule. Magnetic anisotropy analysis indicated that the strength of interactions between Dy III and surrounding ligands determined the orientation of the magnetic easy axis.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yun-Lan Li, Zhong-Ming Huang, Hai-Ling Wang, Zhong-Hong Zhu, Fu-Pei Liang, Hua-Hong Zou
Summary: This study synthesized two Dy-8 clusters with opposite framework structures and revealed their excellent molecular magnetic properties. The self-assembly process of the clusters was successfully tracked using HRESI-MS, and a possible self-assembly mechanism was proposed.
Article
Chemistry, Multidisciplinary
Matteo Briganti, Fabio Santanni, Lorenzo Tesi, Federico Totti, Roberta Sessoli, Alessandro Lunghi
Summary: This study highlights the unique electronic and magnetic properties of lanthanide molecular complexes, focusing on the importance of understanding spin-phonon relaxation mechanisms for further advancements in synthetic chemistry. By computing relaxation times ab initio and examining spin-phonon coupling mechanisms, the research provides a novel set of chemically sound design rules for addressing spin relaxation at any temperature, offering a comprehensive guide for the future development of the field.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Selvakumar Arumugam, Bjoern Schwarz, Prathap Ravichandran, Sunil Kumar, Liviu Ungur, Kartik Chandra Mondal
Summary: This work investigates the dynamic magnetic properties of a complex [(Cp-Ar3)(4)(Dy2Cl4K2)-Cl-III]& BULL;3.5(C7H8) synthesized using a tri-aryl-substituted cyclopentadienyl ligand (Cp-Ar3). The Dy(III)-metallocene weakly couples via K2Cl4 and exhibits slow relaxation of magnetization below 14.5 K under zero applied dc field through KD3 energy levels with an energy barrier of 136.9/133.7 cm(-1) at the Dy sites. The coordination of two chloride ions at each Dy centre leads to geometrical distortion and reduction of the single-ion axial anisotropy energy barrier.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xin-Da Huang, Xiu-Fang Ma, Tao Shang, Yi-Quan Zhang, Li-Min Zheng
Summary: In this study, two new compounds with unique structures and properties were synthesized by incorporating photoreactive anthracene moieties into binuclear metal motifs. One of the compounds undergoes a reversible structural transformation under light and heat treatment, accompanied by changes in magnetic dynamics and photoluminescent properties. This is the first binuclear metal complex that exhibits photocontrollable magnetic dynamics and photoluminescence.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Surya Narayan Panda, Sudip Majumder, Samiran Choudhury, Arpan Bhattacharya, Sumona Sinha, Anjan Barman
Summary: This study investigates the magnetization dynamics in graphene/ferromagnet hybrid heterostructures and reveals an inverse relationship between ultrafast demagnetization time and Gilbert damping parameter, induced by interfacial spin accumulation and pure spin-current transport. The findings can contribute to the understanding of magnetic damping and aid in the design of graphene-based ultrahigh-speed spintronic devices.
Article
Chemistry, Multidisciplinary
Pengfei Tan, Yimou Yang, Wei Lv, Rong Jing, Huihui Cui, Shao-Jun Zheng, Lei Chen, Aihua Yuan, Xue-Tai Chen, Yuyuan Zhao
Summary: A novel 1D polymeric chain complex, based on the combination of cyanometallate- and carbonate-bridged ligands, was synthesized. Magnetic studies revealed two field-induced slow relaxation processes in this chain complex.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Haiquan Tian, Fu-Ping Huang, Yongfei Li, Peiqiong Chen, Keyu Chai, Jing Lu, Hou-Ting Liu, Suyuan Zeng, Dacheng Li, Jianmin Dou
Summary: Two complexes were successfully synthesized by varying the hydrazone ligands in the Dy-phosphonate system, resulting in significant structural transformations. Magnetic studies indicated similar single molecule magnet behaviors for both complexes, demonstrating an effective molecular assembly tactic for developing highly complicated lanthanide coordination clusters.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Jianfeng Wu, Qianqian Yang, Haoyu Wang, Yan Ge, Jinkui Tang, Zhenhui Qi
Summary: The anion-adaptive self-assembly method described in the study successfully produced large single-molecule magnets and explored the influence of structural factors on magnetic properties. X-ray diffraction and magnetic investigations revealed that the resulting hexagonal metallacycle exhibited unique characteristics, behaving as a double relaxation single-molecule magnet under a dc field.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Tian Han, You-Song Ding
Summary: A complex with a dysprosium ion coordinated by two bulky chelating silyldiamide ligands was synthesized and characterized. The coordination geometry allowed slow magnetic relaxation up to 42 K, making it the first silyldiamido dysprosium single-molecule magnet.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiao-Jiao Song, Yu Jing, Xin Feng, Zhao-Bo Hu, Ming Kong, Xiao-Ming Xue, Yi-Quan Zhang, You Song
Summary: A new dinuclear complex Dy2L2(H2L)Cl-2(EtOH)2 has been synthesized and its magnetic behaviors have been studied. Multiple and intricate relaxation pathways have been observed, which differ from previous literature reports.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jing Xi, Peipei Cen, Yan Guo, Yuzhu Li, Yuanyuan Qin, Yi-Quan Zhang, Weiming Song, Xiangyu Liu
Summary: The reversible single-crystal-to-single-crystal conversion of PBP Dy(III) complexes has been achieved, providing insights into the magnetic switches with fascinating transformation processes.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Kieran Hymas, Alessandro Soncini
Summary: This study investigates the contributions of radical-lanthanide exchange coupling and crystal-field tunnel splitting to the energy gap between ground and first-excited states in a 4 f single-ion magnet coupled to a noninnocent ligand. A microscopic theory is presented for continuous measurement of dissipative Landau-Zener transitions, which can help disentangle the magnetic coupling and tunnel splitting effects on the energy gap. The model also explains the decoherent spin tunneling observed in the TbPc2 spin transistor, highlighting the role of phonon-mediated spin relaxation and sequential electron transport through the noninnocent ligand in a time-dependent magnetic field.
Article
Chemistry, Inorganic & Nuclear
Arpan Mondal, Sanjit Konar
Summary: Two mononuclear dysprosium complexes, one with dimethoxydiphenyleborate and the other with NCS and MeOH, were synthesized. Magnetic measurements indicate the presence of field-induced slow relaxation of magnetization in the former complex, while no such phenomenon was observed in the latter complex. The axial anisotropy provided by the larger ligand affects the magnetic properties, indicating the potential for high-performance Dy-based single-ion magnets.
DALTON TRANSACTIONS
(2022)
Article
Multidisciplinary Sciences
Z. Guguchia, C. Mielke, D. Das, R. Gupta, J. -X. Yin, H. Liu, Q. Yin, M. H. Christensen, Z. Tu, C. Gong, N. Shumiya, Md Shafayat Hossain, Ts Gamsakhurdashvili, M. Elender, Pengcheng Dai, A. Amato, Y. Shi, H. C. Lei, R. M. Fernandes, M. Z. Hasan, H. Luetkens, R. Khasanov
Summary: In this study, pressure-tuned and ultra-low temperature muon spin spectroscopy was used to uncover the unconventional nature of superconductivity in RbV3Sb5 and KV3Sb5. It was found that at ambient pressure, time-reversal symmetry breaking charge order was observed in RbV3Sb5, and the superconducting state displayed a nodal energy gap and reduced superfluid density. Applying pressure suppressed the charge-order transitions, increased the superfluid density, and progressively evolved the superconducting state from nodal to nodeless. The optimal superconductivity state was found to break time-reversal symmetry. These results offer unique insights into the nature of the pairing state and highlight the tunable nodal kagome superconductivity competing with time-reversal symmetry-breaking charge order.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Felix Houard, Guiseppe Cucinotta, Thierry Guizouarn, Yan Suffren, Guillaume Calvez, Carole Daiguebonne, Olivier Guillou, Franck Artzner, Matteo Mannini, Kevin Bernot
Summary: This study demonstrates the assembly and transfer of single-chain magnets (SCMs) in the gel phase. SCMs based on Tb-III ions and nitronyl-nitroxides radicals with short alkyl chains can form crystalline supramolecular nanotubes interacting with heptane to create a robust gel. The gel is composed of supramolecular nanotubes, as confirmed by small-angle X-ray scattering, and exhibits SCM behavior in magnetism. Gelation on the surface allows for the deposition of supramolecular nanotubes as thick films or sub-monolayers.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Alessandro Chiesa, Alberto Privitera, Emilio Macaluso, Matteo Mannini, Robert Bittl, Ron Naaman, Michael R. Wasielewski, Roberta Sessoli, Stefano Carretta
Summary: Molecular spins are potential building blocks for future quantum technologies due to the flexibility provided by chemistry. However, their weak interaction with external stimuli makes it difficult to access their state at the single-molecule level. A solution using the chirality-induced spin selectivity effect on electron transfer processes is envisioned, which enables initialization, manipulation, and single-spin readout of molecular qubits and qudits even at relatively high temperatures.
ADVANCED MATERIALS
(2023)
Article
Physics, Condensed Matter
Jennifer Fowlie, Alexandru B. Georgescu, Andreas Suter, Bernat Mundet, Constance Toulouse, Nicolas Jaouen, Michel Viret, Claribel Dominguez, Marta Gibert, Zaher Salman, Thomas Prokscha, Duncan T. L. Alexander, Jens Kreisel, Antoine Georges, Andrew J. Millis, Jean-Marc Triscone
Summary: Thin films of the solid solution Nd1-xLaxNiO3 are grown to investigate the 0 K phase transitions at a specific composition. Experimental measurements and theoretical calculations suggest a discontinuous insulator-metal transition at x = 0.2, while structural analysis indicates no corresponding structural change. Temperature-dependence of the transition is estimated, revealing a narrow insulator-metal phase coexistence with x. Non-static magnetic moments are observed, supporting the first order nature of the 0 K transition and its associated phase coexistence regime.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Instruments & Instrumentation
Lars Gerchow, Sayani Biswas, Gianluca Janka, Carlos Vigo, Andreas Knecht, Stergiani Marina Vogiatzi, Narongrit Ritjoho, Thomas Prokscha, Hubertus Luetkens, Alex Amato
Summary: The pioneering work on Muon-induced x-ray emission (MIXE) technique was conducted at the Paul Scherrer Institute (PSI) in the 1980s for non-destructive assessment of elemental compositions. In recent years, this method has been improved and adopted at many muon facilities worldwide. The GermanIum Array for Non-destructive Testing (GIANT) setup at PSI is a dedicated MIXE spectrometer that offers excellent performance and has been used for various applications such as archaeological research and collaboration with the industry.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Physics, Applied
Ryan M. L. McFadden, Md. Asaduzzama, Thomas Prokscha, Zaher Salman, Andreas Suter, Tobias Junginger
Summary: We present depth-resolved measurements of the Meissner screening profile in surface-treated Nb samples using low-energy muon spin rotation. We find no evidence for any anomalous modifications to the Meissner profiles, with all data well described by a London model. Differences in screening properties between surface treatments can be explained by changes to the carrier mean free paths resulting from dopant profiles near the material's surface.
PHYSICAL REVIEW APPLIED
(2023)
Article
Multidisciplinary Sciences
Evan Kiefl, Ozcan C. Esen, Samuel E. Miller, Kourtney L. Kroll, Amy D. Willis, Michael S. Rappe, Tao Pan, A. Murat Eren
Summary: Comprehensive sampling of natural genetic diversity with metagenomics enables highly resolved insights into the interplay between ecology and evolution. Analyzing genetic variation in the context of predicted protein structures reveals a tight association between genetic variation and protein structure. This approach provides insights into the governing principles of evolution and enables structure-aware investigations of microbial population genetics.
Article
Chemistry, Physical
Claudio Pereti, Kevin Bernot, Thierry Guizouarn, Frantisek Laufek, Anna Vymazalova, Luca Bindi, Roberta Sessoli, Duccio Fanelli
Summary: We propose an approach based on DeepSet technology for supervised classification and regression of superconductive materials. The method takes the chemical constituents as input, avoiding artefacts from ordering in the list. Successful performance is achieved in classifying superconducting materials and quantifying their critical temperature. Using the trained neural network, we searched the International Mineralogical Association list and identified three superconducting candidates, confirming superconductivity in the synthetic analogue of michenerite and observing it for the first time in monchetundraite with critical temperatures in good agreement with theory predictions. This marks the first certified superconducting material identified through artificial intelligence methodologies.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Humanities, Multidisciplinary
Sayani Biswas, Isabel Megatli-Niebel, Lilian Raselli, Ronald Simke, Thomas Elias Cocolios, Nilesh Deokar, Matthias Elender, Lars Gerchow, Herbert Hess, Rustem Khasanov, Andreas Knecht, Hubertus Luetkens, Kazuhiko Ninomiya, Angela Papa, Thomas Prokscha, Peter Reiter, Akira Sato, Nathal Severijns, Toni Shiroka, Michael Seidlitz, Stergiani Marina Vogiatzi, Chennan Wang, Frederik Wauters, Nigel Warr, Alex Amato
Summary: A knob bow fibula of the Leutkirch type was excavated in 2018 in Switzerland and analyzed for its elemental composition. The fibula was made of bronze and consisted of two workpieces, with one being cast bronze and the other being forged bronze. The main elements in the fibula were copper, zinc, tin, and lead.
Article
Anthropology
Beda A. Hofmann, Sabine Bolliger Schreyer, Sayani Biswas, Lars Gerchow, Daniel Wiebe, Marc Schumann, Sebastian Lindemann, Diego Ramirez Garcia, Pierre Lanari, Frank Gfeller, Carlos Vigo, Debarchan Das, Fabian Hotz, Katharina von Schoeler, Kazuhiko Ninomiya, Megumi Niikura, Narongrit Ritjoho, Alex Amato
Summary: A search for meteoritic iron artefacts in the Lake of Biel area in Switzerland has led to the identification of a single object, an arrowhead, with meteoritic origin. The object's elemental composition, mineralogy, and presence of cosmogenic 26Al provide strong evidence for its meteoritic nature. This discovery is significant for understanding the use and distribution of meteoritic iron in ancient societies.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2023)
Article
Computer Science, Interdisciplinary Applications
Anna Lo Grasso, Ada Fort, Fariba Fahmideh Mahdizadeh, Agnese Magnani, Chiara Mocenni
Summary: This study proposes a new mathematical model for describing the dynamics of growing bacterial cultures, which is a first order non-linear differential equation and a generalization of the logistic equation. The model is compared with other widely studied mathematical models and numerically fitted to experimental data collected from the incubation of Pseudomonas fluorescens. The experimental data shows that the new model, as well as the Baranyi-Roberts model, has the lowest fit error and equivalent performance. Simulations of the fitting algorithm also demonstrate the new model's simplicity, manageability, and good convergence time compared to the Baranyi-Roberts model.
MATHEMATICAL AND COMPUTER MODELLING OF DYNAMICAL SYSTEMS
(2023)
Article
Biochemistry & Molecular Biology
Luigi Talarico, Simone Pepi, Surama Susino, Gemma Leone, Claudia Bonechi, Marco Consumi, Ilaria Clemente, Agnese Magnani
Summary: Principles of quality by design and design of experiments are important in the discovery and application of new drug carriers. This study presents an optimized synthesis of solid lipid nanoparticles loaded with Triamcinolone Acetonide using Stearic Acid, soy PC, and Tween 80. The design considers lipid and nonionic surfactant quantities and sonication amplitude to optimize particle size and Zeta potential. Experimental results show good accordance with predicted values, with a small difference in size and Zeta potential from the predicted values.
Article
Biochemistry & Molecular Biology
Claudia Bonechi, Fariba Fahmideh Mahdizadeh, Luigi Talarico, Simone Pepi, Gabriella Tamasi, Gemma Leone, Marco Consumi, Alessandro Donati, Agnese Magnani
Summary: Glaucoma, a group of neurodegenerative diseases, is the second leading cause of irreversible blindness worldwide. The limited penetration of drugs through the ocular barrier reduces the systemic bioavailability, leading to the need for frequent drug administration and potential toxic effects. Liposomes and other novel drug-delivery systems can enhance the therapeutic efficacy of antiglaucomatous drugs by improving drug penetration, bioavailability, sustained release, tissue targeting, and reduction in intraocular pressure.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
