Article
Chemistry, Multidisciplinary
Maria Jose Heras Ojea, Jeff M. Van Raden, Shayan Louie, Richard Collins, Daniel Pividori, Jordi Cirera, Karsten Meyer, Ramesh Jasti, Richard A. Layfield
Summary: The addition of bipyridyl-embedded cycloparaphenylene nanohoop to an iron(II) complex leads to a distorted octahedral structure with spin-crossover behavior. Computational studies suggest that the size and curvature of the nanohoop play a critical role in determining the SCO properties of the iron(II) complex.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Applied
Sophie Schoenfeld, Felix Baier, Jennifer Jungklaus, Gerald Hoerner, Simon Winterstein, Axel Enders, Juergen Senker, Birgit Weber
Summary: This study investigates three novel iron(II) coordination compounds, two of which exhibit spin crossover behavior and were analyzed using XPS and impedance spectroscopic measurements to reveal the complex spin crossover behavior.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Chemistry, Inorganic & Nuclear
Bijoy Dey, Vadapalli Chandrasekhar
Summary: This review focuses on spin crossover phenomena, particularly in Fe-II complexes in the N4O2 coordination environment. It discusses three ligand families: Jager-type ligands, hydrazone-based ligands, and tridentate ligands with salicylaldehyde derivatives. It explores the assembly of mononuclear and multinuclear complexes, as well as the coupling of optical and magnetic properties.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
David Nieto-Castro, Felipe A. Garces-Pineda, Andrea Moneo-Corcuera, Irene Sanchez-Molina, Jose Ramon Galan-Mascaros
Summary: Bistable multifunctional materials have great potential in various devices, but the direct use of spin crossover materials in electronic devices is limited. Incorporating SCO spin crossover materials as probes in conducting organic polymer matrices can lead to low-resistance conductors with memory effect.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lee T. Birchall, Giada Truccolo, Lewis Jackson, Helena J. Shepherd
Summary: In this study, co-crystallisation is proposed as a strategy for materials discovery in the field of switchable spin crossover (SCO) systems. By synthesising 11 new cocrystals using different dipyridyl coformers, the authors demonstrate that the supramolecular architecture and spin crossover behavior of the cocrystals can be modified through changing the coformer. This presents a rapid, facile, and highly modular tool for the discovery of new switchable materials, and has the potential for wider applicability in the design of hybrid multifunctional materials.
Article
Chemistry, Inorganic & Nuclear
Shu-Ya Zhang, Hui-Ying Sun, Run-Guo Wang, Yin-Shan Meng, Tao Liu, Yuan-Yuan Zhu
Summary: The self-assembly of multinuclear SCO complexes is appealing for the discovery of unique properties. In this work, three dinuclear cobalt(II) complexes were prepared using a complementary terpyridine ligand pair strategy. The complexes show different spin crossover behaviors and demonstrate the practicality of the complementary terpyridine ligand pairing in constructing multinuclear SCO-active compounds.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Ruixin Li, Viktor M. Kalita, Hennadii Fylymonov, Wei Xu, Quanjun Li, Jose Antonio Real, Bingbing Liu, Georgiy Levchenko
Summary: In this study, the shape and content of the intermediate phase of spin transition in Hoffmann-like compounds [Fe(Fpz)(2)M(CN)(4)] (M = Pt, Pd) under external stimuli were investigated using magnetic and Raman spectroscopy. The pressure-induced spin transition showed a mixture of high-spin and low-spin states, while the temperature-induced spin transition exhibited a homogeneous state.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Hao Yuan, Jian-Gang Wo, Zheng Yue, Hua-Bing Yu, Wen-Ping Wang, Di Wang
Summary: We synthesized four thiophene-functionalized triazole ligands and successfully obtained five 1D iron chain complexes. The temperature-dependent magnetic susceptibility revealed that three complexes exhibited a transition between two spin states, while the other two complexes maintained a high spin state throughout the temperature range. Additionally, we synthesized two zero-dimensional molecules, both of which displayed weak antiferromagnetic exchange coupling and a high spin state.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Lee T. Birchall, Amber T. Raja, Lewis Jackson, Helena J. Shepherd
Summary: To improve strategies for spin-crossover material design, obtaining isostructural materials is crucial for developing and understanding structure-property relationships. In this study, we synthesized four isostructural cocrystal solvates using a specific complex and coformer. The spin-crossover properties of these materials were determined by single-crystal X-ray diffraction and were found to be influenced by the hydrogen bond basicity of the anions and solvents present.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Xue-Ru Wu, Zhi-Kun Liu, Min Zeng, Ming-Xing Chen, Jun Tao, Shu-Qi Wu, Hui-Zhong Kou
Summary: In this study, two novel fluorescent spin crossover (SCO) complexes were reported, and it was found that three-dimensional Hofmann-type coordination polymers exhibit abnormal fluorescence properties during the SCO process.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
N. Kazak, M. S. Platunov, Yu Knyazev, M. S. Molokeev, M. Gorev, S. G. Ovchinnikov, Z. Pchelkina, V. V. Gapontsev, S. Streltsov, J. Bartolome, A. Arauzo, V. V. Yumashev, S. Yu Gavrilkin, F. Wilhelm, A. Rogalev
Summary: In this study, the spin and oxidation states of Co in Co3BO5 were investigated using XMCD and magnetic susceptibility measurements. Results show that at low temperatures, Co2+ ions are in the HS state while Co3+ ions are in the LS state. The crystal structure shows anomalies at high temperatures.
Article
Chemistry, Multidisciplinary
Xiang Li, Dong Zhang, Yuqing Qian, Wenxuan Liu, Corine Mathonie, Rodolphe Clerac, Xin Bao
Summary: In 2019, a unique Fe-II complex with a low-spin ground state was described by our groups. The accessibility of the low-spin state was hindered by slow dynamics of the high-spin to low-spin phase transition. Here, we report the successful control of this spin-crossover process through metal-ion dilutions. The behavior of thermally induced spin-crossover was observed to emerge or be suppressed depending on the radius of the metal ion used for dilution (Ni-II or Zn-II). The reversible photo-switching was confirmed in all mixed-metal complexes where the low-spin state was thermally accessible.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Y. Singh, K. Affes, N. -I. Belmouri, K. Boukheddaden
Summary: This study investigates the effect of mechanical clamping on thermally induced spin transition in a deformable spin-crossover single crystal. It is found that straining the system edge not only changes the nature of the phase transition but also causes significant macroscopic bending effects. The spatiotemporal investigations reveal the formation of spatially organized tensile and compressive regions resulting from the system's bending.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Narsimhulu Pittala, Emmelyne Cuza, Dawid Pinkowicz, Michal Magott, Mathieu Marchivie, Kamel Boukheddaden, Smail Triki
Summary: A new 1D coordination polymer has been synthesized and characterized. The magnetic and vibrational infrared data analysis reveals the contribution of two Fe-II active centers. Photomagnetic experiment shows that the dehydrated phase exhibits a photomagnetic response.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Multidisciplinary
Yu Gong, Wang-Kang Han, Hui-Shu Lu, Qing-Tao Hu, Huan Tu, Pei-Ni Li, Xiaodong Yan, Zhi-Guo Gu
Summary: The ligand exchange induced SCSC transformation from 3D Hofmann-type frameworks to 2D layer networks, and different pillar-ligands presented significant influences on the structural assembly and spin-crossover properties.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Laura Abad Galan, David Aguila, Yannick Guyot, Veronica Velasco, Olivier Roubeau, Simon J. Teat, Massimiliano Massi, Guillem Aromi
Summary: The ligand H3L has been used to study energy transfer in dinuclear lanthanide analogues, showing that ET between Eu-III and Yb-III does not occur significantly, and that Yb-III emission originates from sensitization by the ligand. Energy migration seems to occur between the two Nd-III centers, with Yb-III luminescence being partially sensitized by ET from Nd.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
M. A. Andres, P. Fontaine, M. Goldmann, C. Serre, O. Roubeau, I Gascon
Summary: This study investigates the formation of MOF monolayer films at the air-water interface and the impact of solvent exchange processes on the adsorption capacity of MOF films. The results show that solvent exchange processes can significantly enhance the CO2 adsorption capacity of MOF films, providing important insights for optimizing the activation procedure of MOF films.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sakandar Rauf, Miguel A. Andres, Olivier Roubeau, Ignacio Gascon, Christian Serre, Mohamed Eddaoudi, Khaled N. Salama
Summary: The Langmuir-Blodgett method is used to deposit ordered monolayer and multilayer thin films of nanomaterials onto different substrates, with this study focusing on the deposition of nanoparticles of a porous metal-organic framework onto insulating or conductive threads and nylon fiber. Results show that the formation of LB films strongly depends on deposition orientation and the type of threads or fiber, with cotton thread and nylon fiber showing homogeneous monolayer coverage and MOF particles tending to aggregate between conductive thread fibers. These findings contribute significantly to the deposition of MOF monolayers onto single fibers and threads for future device fabrication.
Article
Chemistry, Inorganic & Nuclear
Laia Rafols, Dana Josa, David Aguila, Leoni A. Barrios, Olivier Roubeau, Jordi Cirera, Vanessa Soto-Cerrato, Ricardo Perez-Tomas, Manuel Martinez, Arnald Grabulosa, Patrick Gamez
Summary: The newly synthesized compounds showed poor cytotoxic activities in cell cultures, but displayed improved activities in aged DMSO solutions. It was found that the compounds underwent transformation reactions in DMSO, ultimately forming cyclometalated species.
INORGANIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Ines Tejedor, Miguel A. Andres, Arnau Carne-Sanchez, Monica Arjona, Marta Perez-Miana, Javier Sanchez-Lainez, Joaquin Coronas, Philippe Fontaine, Michel Goldmann, Olivier Roubeau, Daniel Maspoch, Ignacio Gascon
Summary: The formation of ultrathin films of Rh-MOPs were studied and controllable film thicknesses were achieved by modifying the properties of the films. The results also showed that the Rh-MOP-supported membranes can be used for efficient CO2 separation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Diamantoula Maniaki, Annika Sickinger, Leoni A. Barrios Moreno, David Aguila, Olivier Roubeau, Nicholas S. Settineri, Yannick Guyot, Francois Riobe, Olivier Maury, Laura Abad Galan, Guillem Aromi
Summary: We report the synthesis and structure of a pure [YbNdYb] coordination complex with short Yb...Nd distances, ideal for investigating intramolecular energy transfer from one Nd3+ ion to two Yb3+ centers. Selective allocation of both metal ions within the molecular structure is achieved by exploiting the difference in ionic radius and using two beta-diketone-type ligands. The efficiency of this process is confirmed by comparing emission and decay times of iso-absorbant solutions of 1, 2, and 3.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Leoni A. Barrios, Simon. J. Teat, Olivier Roubeau, Guillem Aromi
Summary: A biphenyl-spaced bis-pyrazolylpyridine ligand forms a dimetallic helical coordination cage when interacting with ferrous ions, which encapsulates an Fe3+ tris-anilate complex. The host-guest interaction breaks the symmetry of the Fe2+ centers, resulting in a differential spin crossover behavior that can be studied in detail using crystallographic methods.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Isabel Ciria-Ramos, Ines Tejedor, Lucia Caparros, Beatriz Donagueda, Oscar Lacruz, Ainhoa Urtizberea, Olivier Roubeau, Ignacio Gascon, Marta Haro
Summary: Metal-organic frameworks (MOFs) are promising materials for next-generation batteries due to their high surface area, well-defined metal centers, and organic linkers. In this study, a Ni-3(HHTP)(2) MOF was synthesized at the air-liquid interface and used as an electrode in lithium batteries. The MOF film protected the copper collector from oxidation and exhibited improved coulombic efficiency with the inclusion of crystallization time. The use of Langmuir technique allows for the testing of MOF-based materials without the need for additives in the electrodes.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Ines Tejedor, Ainhoa Urtizberea, Eva Natividad, Jesus I. Martinez, Ignacio Gascon, Olivier Roubeau
Summary: This study evaluates the use of pre-formed sub-micronic spherical particles of a doped Gd@Y hydroxycarbonate as a potential quantum hardware for hybrid quantum processors. The particles have adjustable number of spin carriers and show robust quantum coherence. The study offers new material and methodologies relevant to the development of viable hybrid quantum processors.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Ines Tejedor, Ainhoa Urtizberea, Eva Natividad, Jesus I. Martinez, Ignacio Gascon, Olivier Roubeau
Summary: This study evaluates the use of pre-formed sub-micronic spherical particles of doped Gd@Y hydroxycarbonate as a means to build hybrid quantum processors. The particles, which can be adjusted in terms of both size and doping, are shown to have robust quantum coherence and can be integrated into superconducting devices. The study offers new material and methods for the development of viable hybrid quantum processors.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Nuria Capo, Leoni A. Barrios, Joan Cardona, Jordi Ribas-Arino, Simon J. Teat, Olivier Roubeau, Guillem Aromi
Summary: The anion SiF62- plays a significant role in guiding the assembly of two different bispyridylpyrazolyl ligands, resulting in the formation of a novel triple stranded Fe(ii) dinuclear heteroleptic helicate.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ivana Borilovic, Olivier Roubeau, Boris Le Guennic, Joris van Slageren, Samuel Lenz, Simon J. Teat, Guillem Aromi
Summary: An asymmetric bis-phenol-beta-diketone (H4L) has been designed as a ligand that promotes the assembly of three magnetically exchanged [NiCu] pairs, each exhibiting an S = 1/2 spin. EPR and magnetometry measurements show that these pairs are good qubit realizations and non-equivalent within the molecule in the solid state, meeting the requirements for conditional quantum gates.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Diamantoula Maniaki, Diego Garay-Ruiz, Leoni A. Barrios, Daniel O. T. A. Martins, David Aguila, Floriana Tuna, Daniel Reta, Olivier Roubeau, Carles Bo, Guillem Aromi
Summary: This study successfully synthesized high-purity [LnLn'Ln] type molecules using a coordination chemistry scaffold and revealed their exceptional chemical selectivity through density functional theory calculations. The magnetic analysis and ab initio calculations suggest that these composite quantum gates have the potential to act as addressable, conditional multiqubit spin-based quantum gates. Furthermore, EPR analysis and pulsed experiments confirm the coherence and feasibility of these molecular systems.
Article
Chemistry, Multidisciplinary
Leoni A. Barrios, Rosa Diego, Mohanad Darawsheh, Jesus Martinez, Oliver Roubeau, Guillem Aromi
Summary: This article presents a designed dimetallic Fe(ii) helicate made with biphenylene-bridged bispyrazolylpyridine ligands, which exhibits spin crossover at temperatures higher than ambient. It is also demonstrated that this helicate has the ability to encapsulate an S = 5/2 tris-oxalato Fe(iii) ion, leading to a significant reduction in the spin relaxation dynamics of the encapsulated guest.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Inorganic & Nuclear
David Aguila, Olivier Roubeau, Guillem Aromi
Summary: This study explores the synthesis of lanthanide-based coordination compounds using dissymmetric organic ligands, enabling the access to well-defined heterolanthanide compositions and versatile quantum gate design. The weak interaction between the Ln ions allows for multi-qubit quantum logical operations and the implementation of quantum-error correction protocols. The research shows the vast potential of these systems in spin-based quantum information processing.
DALTON TRANSACTIONS
(2021)
