Article
Chemistry, Inorganic & Nuclear
Wei Lv, Hui-Hui Cui, Lei Chen, Yi-Quan Zhang, Xue-Tai Chen, Zhenxing Wang, Zhong-Wen Ouyang, Zi-Ling Xue
Summary: Recently, the influence of ligand choice and geometric control on the magnetic properties of mononuclear Co(II) complexes has been studied. The results show that the coordination environment plays a significant role in the magnetic relaxation behavior of the complexes.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Organic
Jie Yang, Lizhi Gai, Xiaoyang Chen, Yanfei Liu, Shengmei Wu, Jiao Feng, Xinbing Sui, Hua Lu
Summary: This study synthesized dyes with stable seven-membered N,O-boron-chelated skeleton and thoroughly investigated their photophysical properties through spectroscopic tests and theoretical calculations. Single-crystal X-ray diffraction studies provided evidence of their structure. These dyes produced singlet oxygen species under laser irradiation, showing potential as photosensitizers for treating superficial tumors.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
James P. Durrant, Benjamin M. Day, Jinkui Tang, Akseli Mansikkamaki, Richard A. Layfield
Summary: Replacing the ligands in dysprosium single-molecule magnets with a different type leads to larger energy barriers to magnetization reversal. The distances between the ligands in the new complexes suggest a different crystal field splitting. Theoretical analysis shows that the magnetic axes in the ground Kramers doublets are oriented towards the new ligands. Introducing new parameters allows for comparisons between different single-molecule magnets, indicating the potential for improved performance in the new system.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Tong-Kai Luo, Xiang Zhong, Qing-Yun Zhang, Xiao-Feng Chen, Hui Xu, Yan Peng, Sui-Jun Liu, Zhao-Bo Hu, He-Rui Wen
Summary: Four Co(II) complexes based on symmetric Schiff base ligands were synthesized and characterized. These complexes are symmetric Co(II) dimers, with Co(II) ions in complexes 1 and 2 being four-coordinate tetrahedral, and Co(II) ions in complexes 3 and 4 being five-coordinate trigonal bipyramidal. The coordination geometries of the Co(II) ions can be changed from tetrahedral to trigonal bipyramidal by regulating the coordination anions. Magnetic studies show that the remote substituents of the ligands and coordination geometries have no significant effect on the magnetic properties of these Co(II) dimer complexes.
Review
Chemistry, Inorganic & Nuclear
Pradip Kumar Sahu, Ranjan Kharel, Shraoshee Shome, Soumyabrata Goswami, Sanjit Konar
Summary: Single-molecule magnets (SMMs) are molecules that exhibit slow relaxation of magnetization and have potential applications in information storage and quantum computing. To make them practical, high blocking temperature and effective energy for magnetization reversal are required. Enhancing magnetic anisotropy can reduce quantum tunneling of magnetization. Among transition metal ions, Co(II) is a superior choice for designing single-ion magnets.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Ivan Nemec, Ondrej F. Fellner, Berenika Indruchova, Radovan Herchel
Summary: By simple reactions, we have successfully synthesized three different carboxylate complexes. Experimental and theoretical investigations revealed magnetic properties and magnetic anisotropy behavior of these compounds.
Article
Chemistry, Physical
Zuzana Bielkova, Jan Titis, Jaromir Marek, Jan Moncol, Alena Klokocikova, Christoph Wesemann, Franz Renz, Cyril Rajnak
Summary: In this study, a series of tetracoordinate mononuclear Co(II) complexes were synthesized and characterized. The magnetic properties of the complexes were investigated and compared with theoretical calculations.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Chemistry, Inorganic & Nuclear
Maria-Gabriela Alexandru, Diana Visinescu, Sergiu Shova, Joan Cano, Nicolas Moliner, Francesc Lloret, Miguel Julve
Summary: A new mixed-valence one-dimensional coordination polymer was obtained by reacting Ph4P[Co-II(dmphen)(CN)(3)] with cobalt(II) acetate tetrahydrate. The structure analysis revealed the formation of a neutral 4,2-ribbon-like chain of vertex-sharing cyanido-bridged {(Co2Co2II)-Co-III} squares. The polymer exhibits slow magnetic relaxation under non-zero applied dc fields, making it a new example of field-induced SIM with easy-plane magnetic anisotropy.
Article
Chemistry, Organic
Robindo Chatterjee, Bappaditya Goswami, Ambika Devi, Swati Rani, Manas Khatua, Subhas Samanta
Summary: Unprecedented metal-free complete o-phenylenebridged N (4)-cyclophanes (M1 and M2) were synthesized via sequential palladium-catalyzed Buchwald-Hartwig N-arylation reactions. These cyclophanes can be considered as aromatic analogues of aliphatic group-spaced N (4)-macrocycles. Physicochemical characterization techniques and single crystal X-ray structure determination were used to fully characterize them. Their redox and spectral properties were characterized by cyclic voltammetry, UV-vis spectro-electrochemistry, fluorescence spectral studies, and DFT calculations. These studies revealed rich redox, spectral, and photophysical properties, making both M1 and M2 potential candidates for various applications.
Article
Chemistry, Multidisciplinary
Subrata Ghosh, Sujit Kamilya, Sakshi Mehta, Radovan Herchel, Mikhail Kiskin, Sergey Veber, Matvey Fedin, Abhishake Mondal
Summary: Four cobalt(II) complexes incorporating ethylenedioxythiophene based redox-active luminescence ligands were synthesized and characterized. These complexes exhibit different structures and magnetic properties, and display slow magnetic relaxation behavior.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Kaili Wu, Xin Wang, Wenqing Wang, Yan Luo, Wei Cao, Yiyao Cao, Haijiao Xie, Yan Yan, Huijuan Lin, Jixin Zhu, Kun Rui
Summary: A straightforward topochemical strategy is presented to construct Co-based heterostructured nanofiber stereoassembled with P-O coupled nanosheet, which leads to prominent electron redistribution and enhanced catalytic activities. The rational interface engineering accelerates charge transfer and optimizes surface adsorption/desorption behaviors, resulting in boosted kinetics for both hydrogen evolution reaction and oxygen evolution reaction.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhongtao Li, Jun Yang, Zhou Chen, Caiyan Zheng, Liang Qin Wei, Yingchun Yan, Han Hu, Mingbo Wu, Zhenpeng Hu
Summary: A Co-V oxide structure has been successfully established to eliminate the energy barrier caused by sluggish charge carrier transfer mobility during the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), and to stimulate the OER through a more effective lattice oxygen oxidation mechanism.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Martina Cirulli, Enrico Salvadori, Zhi-Hui Zhang, Michael Dommett, Floriana Tuna, Heiko Bamberger, James E. M. Lewis, Amanpreet Kaur, Graham J. Tizzard, Joris van Slageren, Rachel Crespo-Otero, Stephen M. Goldup, Maxie M. Roessler
Summary: Mechanically chelating ligands have potential for designing metal complexes, as demonstrated in Co-II-based single-ion magnets, with the ability to evaluate and understand magnetic properties through a combined experimental and theoretical approach.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Shan Xue, Mengwei Li, Yi Han, Yulan Chen
Summary: A series of N,O-bidentated BPh2 complexes were designed and synthesized, showing inherent D-A structures, distorted molecular conformations, and loose packing in crystal structures. The compounds exhibited high solid-state fluorescence efficiency and color contrast reversible mechanochromic properties, with sensitivity and response modulated by electronic and steric effects. The study suggests that N,O-bidentated BPh2 based emitters enable the development of excellent MCL-active materials with potential applications in optical force sensors and optoelectronic devices.
Article
Chemistry, Inorganic & Nuclear
J. Rolando Aguilar-Calderon, Dominik Fehn, Dieter Sorsche, Matthias Miehlich, Patrick J. Carroll, Ethan Zars, Karsten Meyer, Daniel J. Mindiola
Summary: The study focused on the characterization of Fe and Co nitrene complexes, as well as the synthesis of new compounds using a nitrene transfer strategy.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Aritz Landart-Gereka, Maria Mar Quesada-Moreno, Maria A. Palacios, Ismael F. Diaz-Ortega, Hiroyuki Nojiri, Mykhaylo Ozerov, J. Krzystek, Enrique Colacio
Summary: Replaced pyridine with 1-methyl-imidazol in the arms of a N-6-tripodal ligand to prepare two new Co-II complexes with quasi-ideal triangular prismatic geometry, which act as SIMs with enhanced axial magnetic anisotropy, magnetic relaxation times, and magnetic hysteresis at zero dc field.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Malay Dolai, Surajit Biswas, Eufemio Moreno-Pineda, Wolfgang Wernsdorfer, Mahammad Ali, Razan A. Alshgari, Saikh Md. Wabaidur, Ashutosh Ghosh
Summary: Two dinuclear complexes were synthesized and characterized, and their catalytic activity in the carbon dioxide insertion reaction into epoxides for the formation of organic cyclic carbonates was studied. The complexes showed efficient catalytic activity with high yields and turnover numbers.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
D. Rieger, S. Guenzler, M. Spiecker, P. Paluch, P. Winkel, L. Hahn, J. K. Hohmann, A. Bacher, W. Wernsdorfer, I. M. Pop
Summary: By using a self-structured aluminum nanojunction, a nonlinearity medium can be formed between superconducting electrodes, acting as a replacement for Josephson junctions. The new type of qubit, gralmonium, exhibits similar performance to the traditional fluxonium qubit, but the lack of a mesoscopic parallel plate capacitor leads to a significantly larger charging energy for the aluminum nanojunction, providing a powerful diagnostic tool for microscopic defects in superconducting materials.
Article
Materials Science, Multidisciplinary
Juan-Ramon Jimenez, Sandra Miguez-Lago, Maxime Poncet, Yating Ye, Cesar Lopez Ruiz, Carlos M. M. Cruz, Araceli G. G. Campana, Enrique Colacio, Claude Piguet, Juan Manuel Herrera
Summary: In this study, chiral luminescent (CrN6)-N-III complex doped silica nanoparticles (Cr@SiO(2)NPs) and highly luminescent Eu(tta)(3)(phen-Si) post-functionalized silica nanoparticles (EuCr@SiO(2)NPs) were synthesized and characterized. The hybrid materials displayed efficient and bright long-lived dual simultaneous non-polarized red and polarized NIR-I luminescence. The encapsulated Cr-III complex showed enhanced CPL brightness compared to the non-encapsulated complex.
JOURNAL OF MATERIALS CHEMISTRY C
(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
Chemistry, Inorganic & Nuclear
Gheorghe Taran, Edgar Bonet, Eufemio Moreno-Pineda, Mario Ruben, Wolfgang Wernsdorfer
Summary: Through numerical simulation, we find that phonon-modulated hyperfine interaction opens a direct relaxation channel between the nuclear spins and the phonon bath. The mechanism is of potential importance for the theory of spin bath and the relaxation dynamics of the molecular spins.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Applied
A. Chiesa, S. Roca, S. Chicco, M. C. de Ory, A. Gomez-Leon, A. Gomez, D. Zueco, F. Luis, S. Carretta
Summary: In this study, a blueprint of a molecular spin quantum processor is presented, which uses molecular spins as qudits. The performance of this platform is evaluated through numerical simulations, showing the feasibility of the molecular route towards a universal quantum processor.
PHYSICAL REVIEW APPLIED
(2023)
Review
Chemistry, Multidisciplinary
Veacheslav Vieru, Silvia Gomez-Coca, Eliseo Ruiz, Liviu F. Chibotaru
Summary: This review discusses the synthesis methods of single-molecule magnets (SMMs) and the basic factors affecting their performance, as well as the strategies for further enhancing SMM performance. Practical approaches for designing SMMs for memory devices are also presented.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Ting-Ting Ruan, Eufemio Moreno-Pineda, Michael Schulze, Soeren Schlittenhardt, Thomas Brietzke, Hans-Jurgen Holdt, Senthil Kumar Kuppusamy, Wolfgang Wernsdorfer, Mario Ruben
Summary: This article describes two dysprosium-based isotopologues and investigates their magnetic properties. The study found that shorter distances between Dy(III) are crucial for creating Qudits with enlarged Hilbert spaces.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Emilio Macaluso, Alessandro Chiesa, Paolo Santini, Robert Bittl, Stefano Carretta
Summary: Investigating the role of chiral-induced spin selectivity in the generation of spin correlated radical pairs in a photoexcited donor-chiral bridge-acceptor system is fundamental to exploit it in quantum technologies. This requires a minimal master equation description of both charge separation and recombination through a chiral bridge. To achieve this without adding complexity and entering in the microscopic origin of the phenomenon, we investigate the implications of spin-polarizing reaction operators to the master equation. The explicit inclusion of coherent evolution yields non-trivial behaviors in the charge and spin dynamics of the system. Finally, we apply this master equation to a setup comprising a molecular qubit attached to the donor-bridge-acceptor molecule, enabling qubit initialization, control, and read-out. Promising results are found by simulating this sequence of operations assuming realistic parameters and achievable experimental conditions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Applied
D. Rieger, S. Guenzler, M. Spiecker, A. Nambisan, W. Wernsdorfer, I. M. Pop
Summary: Resonator measurements are a powerful tool for characterizing a material's microwave response. The losses of a resonant mode can be quantified by its internal quality factor Qi, which can be affected by Fano interference. Limited knowledge of interfering paths in a setup leads to uncertainty in Qi, increasing with the coupling coefficient. This study demonstrates the relevance of Fano interference in microwave resonator measurements and provides insight into eliminating systematic errors.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Enrique Ortega-Forte, Anna Rovira, Marta Lopez-Corrales, Alba Hernandez-Garcia, Francisco Jose Ballester, Eduardo Izquierdo-Garcia, Mireia Jorda-Redondo, Manel Bosch, Santi Nonell, Maria Dolores Santana, Jose Ruiz, Vicente Marchan, Gilles Gasser
Summary: Photodynamic therapy (PDT) is a promising cancer treatment method, but it is limited by its oxygen dependency and poor tissue penetration of some photosensitizers (PSs) activatable with short wavelengths. In this study, a novel hypoxia-active PS with operability in the near-infrared (NIR) region was developed, which showed high photoactivity toward cancer cells even under hypoxic environments. This strategy could potentially pave the way for the development of novel NIR- and hypoxia-active Ru(ii)-based theragnostic PSs.
Article
Chemistry, Inorganic & Nuclear
Pawan Kumar, Pankaj Kalita, Maria A. Palacios, Vierandra Kumar, Joydev Acharya, Enrique Colacio, Vadapalli Chandrasekhar
Summary: The synthesis, structure, and magnetic properties of homometallic hexanuclear lanthanide complexes have been reported. These complexes consist of two trinuclear triangular sub-units linked through phenoxide bridging groups. Complex 1 exhibits a magnetocaloric effect with a maximum value of -Delta S-m = 21.03 J kg(-1) K-1 at T = 3 K and Delta B = 5 T. Complex 3 shows slow relaxation of magnetization even under zero applied field, and a clear maximum in the out-of-phase component of the ac susceptibility is observed under an applied field of 0.2 T.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Akhilesh Kumar, Amit Rajput, Pawanjeet Kaur, Indresh Verma, Rohan D. Erande, Saleem Javed, Julia Klak, Shefa' F. Alrebei, Antonio J. Mota, Enrique Colacio, Himanshu Arora
Summary: Two new coordination complexes have been synthesized and characterized. Complex 1 is a dinuclear coordination complex and complex 2 is a tetranuclear coordination complex. Magnetic studies reveal weak antiferromagnetic coupling between low-spin Fe-III and high-spin Mn-II ions in complex 1, while complex 2 exhibits both ferro- and antiferromagnetic coupling between metal ions in the tetranuclear Cu2(II)Fe2(III) unit.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Andoni Zabala-Lekuona, Aritz Landart-Gereka, Maria Mar Quesada-Moreno, Antonio J. Mota, Ismael F. Diaz-Ortega, Hiroyuki Nojiri, Jurek Krzystek, Jose M. Seco, Enrique Colacio
Summary: A new linear trinuclear Co(II)(3) complex has been synthesized and exhibits interesting magnetic behavior.
INORGANIC CHEMISTRY
(2023)
