Article
Chemistry, Multidisciplinary
Junhao Wang, Jakub J. J. Zakrzewski, Mikolaj Zychowicz, Yue Xin, Hiroko Tokoro, Szymon Chorazy, Shin-ichi Ohkoshi
Summary: A new approach combining the behavior of Single-Molecule Magnets (SMMs) and luminescence thermometry has been studied for the contactless temperature readout of future SMM-based devices. It was found that the structural transformation of Tb-III-based emissive SMMs formed in a cyanido-bridged framework can enhance the SMM effect, resulting in SMM features up to 42 K. Both systems exhibit emission related to f-f electronic transitions, allowing for optical thermometry below 100 K. Dehydration expands the temperature overlap between SMM behavior and thermometry, from 6 K to 42 K.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Cai-Ming Liu, Xiang Hao, De-Qing Zhang
Summary: Two new Zn(II)-Dy(II) complexes exhibit rare magnetic properties with a NO(7) triangular dodecahedral coordination sphere, showing field-induced single-molecule magnet behavior. Among them, complex 2 has a higher energy barrier value compared to the Dy(III) complexes reported in the literature with the DyNO(7) triangular dodecahedral coordination configuration.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Review
Chemistry, Physical
Xiang Yin, Li Deng, Liuxia Ruan, Yanzhao Wu, Feifei Luo, Gaowu Qin, Xiaoli Han, Xianmin Zhang
Summary: Single-molecule magnets (SMMs) based on rare earth elements have great potential for application in molecular spintronic devices. This review highlights the recent progress in rare earth SMMs, focusing on the modulation of magnetic anisotropy, effective energy barrier, and blocking temperature. Terbium- and dysprosium-based SMMs have shown a high effective energy barrier of 1541 cm(-1) and an increased blocking temperature of 80 K, surpassing the boiling point temperature of liquid nitrogen. The development of preparation technology for rare earth SMMs is also summarized. This review offers important implications and insights for the design and research of Ln-SMMs.
Article
Nanoscience & Nanotechnology
Jeffrey A. Ivie, Nathan D. Bamberger, Keshaba N. Parida, Stuart Shepard, Dylan Dyer, Aldilene Saraiva-Souza, Roland Himmelhuber, Dominic McGrath, Manuel Smeu, Oliver L. A. Monti
Summary: This study investigates the relationship between chemical substituents and the conductance of metal-single-molecule-metal junctions, revealing complex effects on energy-level alignment in the junction. The proposed design principles are capable of predicting conductance trends and aid in suggesting novel strategies for maximizing conductance tunability in single-molecule systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Chen Wang, Yin-Shan Meng, Shang-Da Jiang, Bing-Wu Wang, Song Gao
Summary: Single-molecule magnets (SMMs) with slow magnetization relaxation and purely molecular hysteresis are promising for information storage, spintronics, and quantum computing. Improving the blocking temperature (T-B) and effective relaxation barrier (U-eff) is crucial for their application. Multidisciplinary research has achieved SMMs with a U-eff up to 2,000 K and a T-B in the liquid nitrogen region. Enhancing the uniaxiality of magnetic anisotropy is critical for high-performance SMMs.
SCIENCE CHINA-CHEMISTRY
(2023)
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)
Review
Chemistry, Multidisciplinary
Vijay S. Parmar, David P. Mills, Richard E. P. Winpenny
Summary: Recent studies have shown that mononuclear lanthanide (Ln) complexes can be high-performing single-molecule magnets (SMMs). The focus is on mononuclear Dy-III alkoxide and aryloxide SMMs with coordination numbers up to eight, covering synthesis, solid-state structures and magnetic attributes. Brief overviews are also provided of mononuclear Tb-III, Ho-III, Er-III and Yb-III alkoxide and aryloxide SMMs.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yu-Xia Wang, Yinina Ma, Jie-Su Wang, Yue Yang, Yun-Nan Guo, Yi-Quan Zhang, Kui-Juan Jin, Young Sun, Peng Cheng
Summary: A new material, ferroelectric single-molecule magnets (FE SMMs), which exhibit single-molecule magnetic behaviors, toroidal magnetic moments, and room-temperature ferroelectricity, has been reported. The presence of toroidal moments and ferroelectricity, along with quantum magnetism, in these rare-earth single-molecule magnets, leads to a unique class of multiferroics.
Review
Chemistry, Inorganic & Nuclear
Zeng-Xi Yang, Feng Gong, Dunmin Lin, Yu Huo
Summary: Single-molecule magnets (SMMs) are attracting attention for their potential applications in high-density information storage and spintronic devices. Organic ligands and inorganic polyoxometalates (POMs) have been used to achieve high-performance SMMs. POMs offer advantages such as excluding dipole-dipole coupling and providing rigid frameworks for surface deposition and device applications. This review systematically summarizes the research progress and design strategies for POM-based SMMs, as well as the multifunctional properties for future application devices.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Qian-Cheng Luo, Ning Ge, Yuan-Qi Zhai, Tengbo Wang, Lin Sun, Qi Sun, Fanni Li, Zhendong Fu, Yan-Zhen Zheng
Summary: Two erbium(III) complexes, [ErCl(OArAd)3][Na(THF)6] (1) and Er(OArAd)3 (2), were prepared using a hard base ligand with large steric hindrance. The change in coordination geometry around the Er(III) site from distorted tetrahedral to flat trigonal pyramid geometry in different solvent environments enhanced the single-molecule magnet (SMM) behavior, with a field-induced effective energy barrier (Ueff) of 43(1) cm -1 for the latter. The study demonstrates the importance of a strong equatorial ligand field and high local symmetry in suppressing quantum tunneling of the magnetization (QTM) to achieve high-performance erbium(III)-based SMMs.
CHINESE CHEMICAL LETTERS
(2023)
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
Chia-Hsiang Chen, Lukas Spree, Emmanouil Koutsouflakis, Denis S. Krylov, Fupin Liu, Ariane Brandenburg, Georgios Velkos, Sebastian Schimmel, Stanislav M. Avdoshenko, Alexander Fedorov, Eugen Weschke, Fadi Choueikani, Philippe Ohresser, Jan Dreiser, Bernd Buchner, Alexey A. Popov
Summary: This study demonstrates a facile solution-based procedure for preparing functional magnetic sub-monolayers by self-assembling fullerene-SMM derivatives on metal substrates, with DySc2N@C-80 grafted on gold showing magnetic bistability up to 10 K.
Article
Chemistry, Multidisciplinary
Lukas Spree, Fupin Liu, Volker Neu, Marco Rosenkranz, Georgios Velkos, Yaofeng Wang, Sandra Schiemenz, Jan Dreiser, Pierluigi Gargiani, Manuel Valvidares, Chia-Hsiang Chen, Bernd Buchner, Stanislav M. Avdoshenko, Alexey A. Popov, H. Chen
Summary: Chemical functionalization of fullerene single molecule magnet enables the facile preparation of robust monolayers on graphene and highly oriented pyrolytic graphite without impairing their magnetic properties. Monolayers of endohedral fullerene functionalized with pyrene exhibit magnetic bistability up to a temperature of 28 K, showing potential for integration of spin carrying units encapsulated by fullerene cages on graphitic substrates.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Xiao Guo, Qiuhao Zhu, Liyan Zhou, Wei Yu, Wengang Lu, Wenjie Liang
Summary: This study investigates the two-stage Kondo effect using single molecule transistor devices, demonstrating universal quadratic dependence of Kondo resonance. The research reveals the differences in conductance between the two-stage Kondo effect and the spin 1/2 Kondo effect.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yang Zhou, Run-Zhuo Yao, Xingwei Cai, Zhenxing Wang, Peipei Cen, Yong Yang, Aihua Yuan, Yisong Tang, Xiaoyun Chen, Shuanhong Zhang, Zhong-Wen Ouyang, Lei Chen
Summary: Soft donor ligands play a critical role in the construction of 3d transition-metal complexes with large magnetic anisotropy. In this study, a soft tripodal ligand was used to construct a high-spin mononuclear complex, which exhibited single-molecule magnet behavior.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Multidisciplinary
Miguel Gavara-Edo, Francisco Javier Valverde-Munoz, Rosa Cordoba, M. Carmen Munoz, Javier Herrero-Martin, Jose Antonio Real, Eugenio Coronado
Summary: In this study, three new neutral Fe(II) SCO molecules belonging to the {Fe[H2B(pz)(2)](2)(L)} family were synthesized, and their crystallographic structure and magnetic properties were investigated. These compounds exhibited thermal- and light-induced SCO transitions with different degrees of cooperativity and effectiveness. Furthermore, two of the compounds were demonstrated to be sublimable, forming homogeneous thin films that retained the chemical integrity of the original molecules. SCO/2D horizontal hybrid devices based on CVD-graphene were successfully produced using these films, enabling the detection of the thermal SCO transition through the electric properties of CVD-graphene.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Medicinal
Gonzalo Duran-Sampedro, Evelyn Y. Xue, Marta Moreno-Simoni, Celia Paramio, Tomas Torres, Dennis K. P. Ng, Gema de la Torre
Summary: Pt(II)-BODIPY complexes combine the chemotherapeutic activity of Pt(II) with the photocytotoxicity of BODIPYs. Additional conjugation with targeting ligands can boost the uptake by cancer cells that overexpress the corresponding receptors. Both Pt(II) triangles, 1 and 2, built with pyridyl BODIPYs functionalized with glucose or triethylene glycol methyl ether, showed higher singlet oxygen quantum yields and cellular uptake compared to non-functionalized BODIPYs.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Henrik Gotfredsen, Dominik Thiel, Phillip M. Greibel, Lan Chen, Marcel Krug, Ilias Papadopoulos, Michael J. Ferguson, Mogens Brondsted Nielsen, Tomas Torres, Timothy Clark, Dirk M. Guldi, Rik R. Tykwinski
Summary: This study investigates the influence of sensitizer-chromophore geometry on the separation of singlet excited states into triplet excited states. Two conjugates with different arrangements were synthesized and compared. The results show that the energy transfer rate is 26 times faster in the peripheral arrangement, even though the chromophores are farther apart. This rate acceleration is attributed to the more favorable relative orientation of the transition dipole moments in the peripheral structure. These findings are of significant importance for solar energy research.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Jorge Labella, Tomas Torres
Summary: Subphthalocyanines (SubPcs) have been extensively researched due to their unique properties, rich chemistry, and wide applicability. Significant progress has been made in understanding the molecular structure-property relationship of SubPcs and implementing them in advanced technological devices. However, SubPcs still have untapped potential more than 50 years after their discovery. In this short review, we highlight the main trends in SubPc chemistry, with a focus on their use as molecular materials.
TRENDS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Francisco Marques-Moros, Carla Boix-Constant, Samuel Manas-Valero, Josep Canet-Ferrer, Eugenio Coronado
Summary: We conducted a comprehensive optical characterization of the van der Waals semiconductor metamagnet CrSBr using temperature- and magnetic-field-dependent photoluminescence. We observed a characteristic peak that disappeared when switching the ferromagnetic layers and exhibited a different temperature dependence from excitonic peaks. This peak's contribution to photoluminescence was enhanced around 30-40 K, coinciding with the hidden order magnetic transition temperature. Our findings reveal the connection between optical and magnetic properties through the ionization of magnetic donor vacancies and demonstrate the potential of designing 2D heterostructures with magnetic and excitonic properties.
Article
Chemistry, Multidisciplinary
Ainhoa Salazar, Marta Moreno-Simoni, Sunit Kumar, Jorge Labella, Tomas Torres, Gema de la Torre
Summary: This study introduces a supramolecular cage that acts as a catalytic molecular reactor for transformations over fullerenes in aqueous medium. The cage, based on metallo-organic Pd(II)-subphthalocyanine, facilitates Diels-Alder reactions between C60 and anthracene with high regioselectivity. Catalytic turnover is achieved by the lower stability of the host:guest complex with the resulting C60 cycloadduct, allowing for better conversions in the hydrophobic environment provided by the cage.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Evgenii N. Ivanov, Veronica Almeida-Marrero, Oskar I. Koifman, Viktor V. Aleksandriiskii, Tomas Torres, Mikhail K. Islyaikin
Summary: New substituted [30]trithiadodecaazahexaphyrines (hemihexaphyrazines) were synthesized by a crossover condensation of 2,5-diamino-1,3,4-thiadiazole with 4-chloro-5-(2,6-diisopropylphenoxy)- or 4,5-bis-(2,6-diisopropylphenoxy)phthalonitriles. The compounds were characterized by various spectroscopic and analytical techniques.
Article
Materials Science, Multidisciplinary
Anna-Sophie Wollny, Giulia Lavarda, Ilias Papadopoulos, Ismael Lopez-Duarte, Henrik Gotfredsen, Yuxuan Hou, Rik R. Tykwinski, Tomas Torres, Dirk M. Guldi
Summary: In this study, the energy donor BODIPY is combined with pentacene dimer to form a conjugate BODIPYPnc(2) that can absorb a broad range of solar spectrum. Upon photoexcitation, the singlet excited state energy of BODIPY is transferred to the pentacene dimer through FRET, and then the pentacene dimer undergoes singlet fission. The results indicate that solvent polarity affects the system, with the highest FRET rate and triplet quantum yield obtained in the most polar solvent benzonitrile.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Electrochemistry
Jose Garcia-Calvo, Rosemary R. Cranston, Ismael Lopez-Duarte, Tomas Torres, Benoit H. Lessard
Summary: This article discusses the synthesis and implementation of two novel ruthenium phthalocyanine derivatives in organic thin-film transistors (OTFTs). One derivative showed promising performance, while the other did not. This study provides a promising starting point for the future development of ruthenium phthalocyanine electronic devices.
Article
Pharmacology & Pharmacy
Irene Paramio, Ainhoa Salazar, Mireia Jorda-Redondo, Santi Nonell, Tomas Torres, Gema de la Torre
Summary: In this study, the authors demonstrated the ability of amphiphilic Phthalocyanine (Pc) photosensitizers (PS) to assemble into cationic nanoparticles in water and effectively kill bacterial strains through photoinactivation. The stability and characteristics of the PS nanoparticles were investigated using various spectroscopic and imaging techniques. Among the synthesized PS, PS1 showed the highest efficacy in killing both gram-positive S. aureus and gram-negative E. coli, potentially due to its lower stability and ability to recover the photophysical properties of the non-aggregated species after binding to the bacteria surface.
ADVANCED THERAPEUTICS
(2023)
Article
Chemistry, Multidisciplinary
Mario Palacios-Corella, Victor Garcia-Lopez, Joao Carlos Waerenborgh, Bruno J. C. Vieira, Guillermo Minguez Espallargas, Miguel Clemente-Leon, Eugenio Coronado
Summary: A bifunctionalized polyoxometalate containing a redox active hexavanadate moiety and two tridentate 2,6-bis(pyrazol-1-yl)pyridine ligands was synthesized and characterized. Reaction with Fe(ii) or Zn(ii) ions resulted in the formation of crystalline 1D networks with tunable magnetic and redox properties. The structures exhibited spin-crossover behavior, which could be induced by light irradiation, and reversible solvent exchange. Additionally, the hexavanadate unit could be reduced and reoxidized, leading to changes in the spin state of Fe(ii) and creating a multifunctional material that can be controlled by various stimuli.
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
Multidisciplinary Sciences
Junhyeon Jo, Yuan Peisen, Haozhe Yang, Samuel Manas-Valero, Jose J. Baldovi, Yao Lu, Eugenio Coronado, Felix Casanova, F. Sebastian Bergeret, Marco Gobbi, Luis E. Hueso
Summary: We demonstrate novel devices based on the unique properties of two-dimensional materials, including infinite magnetoresistance and nonreciprocal charge transport, using NbSe2/CrSBr van der Waals superconducting spin valves. We also show the realization of a superconductive spin valve with multiple stable resistance states by integrating different CrSBr crystals in a lateral heterostructure.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Miguel Gavara-Edo, Francisco Javier Valverde-Munoz, M. Carmen Munoz, Safaa Elidrissi Moubtassim, Francisco Marques-Moros, Javier Herrero-Martin, Kateryna Znovjyak, Maksym Seredyuk, Jose Antonio Real, Eugenio Coronado
Summary: Materials based on spin crossover molecules have attracted significant attention in molecular magnetism. This study presents a novel spin crossover material that can form thermally stable thin films while retaining its molecular bistability.
CHEMISTRY OF MATERIALS
(2023)
