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Mathialagan SK, Parreiras SO, Tenorio M, Černa L, Moreno D, Muñiz‐Cano B, Navío C, Valvidares M, Valbuena MA, Urgel JI, Gargiani P, Miranda R, Camarero J, Martínez JI, Gallego JM, Écija D. On-Surface Synthesis of Organolanthanide Sandwich Complexes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308125. [PMID: 38610109 PMCID: PMC11200025 DOI: 10.1002/advs.202308125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/23/2024] [Indexed: 04/14/2024]
Abstract
The synthesis of lanthanide-based organometallic sandwich compounds is very appealing regarding their potential for single-molecule magnetism. Here, it is exploited by on-surface synthesis to design unprecedented lanthanide-directed organometallic sandwich complexes on Au(111). The reported compounds consist of Dy or Er atoms sandwiched between partially deprotonated hexahydroxybenzene molecules, thus introducing a distinct family of homoleptic organometallic sandwiches based on six-membered ring ligands. Their structural, electronic, and magnetic properties are investigated by scanning tunneling microscopy and spectroscopy, X-ray absorption spectroscopy, X-ray linear and circular magnetic dichroism, and X-ray photoelectron spectroscopy, complemented by density functional theory-based calculations. Both lanthanide complexes self-assemble in close-packed islands featuring a hexagonal lattice. It is unveiled that, despite exhibiting analogous self-assembly, the erbium-based species is magnetically isotropic, whereas the dysprosium-based compound features an in-plane magnetization.
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Affiliation(s)
| | - Sofia O. Parreiras
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
| | - Maria Tenorio
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
| | - Lenka Černa
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
- Brno University of TechnologyBrno60190Czech Republic
| | - Daniel Moreno
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
| | - Beatriz Muñiz‐Cano
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
| | - Cristina Navío
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
| | | | - Miguel A. Valbuena
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
| | - José I. Urgel
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
- Unidad de Nanomateriales AvanzadosIMDEA NanoscienceUnidad Asociada al CSIC por el ICMMMadrid28049Spain
| | | | - Rodolfo Miranda
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
- Departamento de Física de la Materia Condensada and Condensed Matter Physics Center (IFIMAC)Universidad Autónoma de MadridCantoblancoMadrid28049Spain
| | - Julio Camarero
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
- Departamento de Física de la Materia Condensada and Condensed Matter Physics Center (IFIMAC)Universidad Autónoma de MadridCantoblancoMadrid28049Spain
| | - José I. Martínez
- Instituto de Ciencia de Materiales de Madrid (ICMM)CSICCantoblancoMadrid28049Spain
| | - José M. Gallego
- Instituto de Ciencia de Materiales de Madrid (ICMM)CSICCantoblancoMadrid28049Spain
| | - David Écija
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience)Madrid28049Spain
- Unidad de Nanomateriales AvanzadosIMDEA NanoscienceUnidad Asociada al CSIC por el ICMMMadrid28049Spain
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2
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Ji Y, Lv H, Wu X. First-principles calculations of inorganic metallocene nanowires. NANOSCALE ADVANCES 2024; 6:985-989. [PMID: 38298596 PMCID: PMC10825901 DOI: 10.1039/d3na00926b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 12/29/2023] [Indexed: 02/02/2024]
Abstract
Inspired by the recently synthesized inorganic metallocene derivatives Fe(P4)22-, we have identified four stable inorganic metallocene nanowires, MP4 (M = Sc, Ti, Cr and Fe) in configurations of either regular quadrangular prism (Q-type) or anticube (A-type), and further investigated their magnetic and electronic characteristics utilizing the first-principles calculation. It shows that CrP4 is a ferromagnetic metal, while other nanowires are semiconducting antiferromagnets with bandgaps of 0.44, 1.88, and 2.29 eV within the HSE06 level. It also shows that both ScP4 and TiP4 can be stabilized in the Q-type and A-type, corresponding to the antiferromagnetic and ferromagnetic ground states, respectively, indicating a configuration-dependent magnetism. The thermodynamic and lattice stabilities are confirmed by the ab initio molecular dynamics and phonon spectra. This study has unmasked the structural and physical properties of novel inorganic metallocene nanowires, and revealed their potential application in spintronics.
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Affiliation(s)
- Yangqi Ji
- School of Chemistry and Materials Science, CAS Key Laboratory of Materials for Energy Conversion, CAS Center for Excellence in Nanoscience, University of Science and Technology of China Hefei Anhui 230026 China
| | - Haifeng Lv
- School of Chemistry and Materials Science, CAS Key Laboratory of Materials for Energy Conversion, CAS Center for Excellence in Nanoscience, University of Science and Technology of China Hefei Anhui 230026 China
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China Hefei Anhui 230026 China
| | - Xiaojun Wu
- School of Chemistry and Materials Science, CAS Key Laboratory of Materials for Energy Conversion, CAS Center for Excellence in Nanoscience, University of Science and Technology of China Hefei Anhui 230026 China
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China Hefei Anhui 230026 China
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Münzfeld L, Gillhuber S, Hauser A, Lebedkin S, Hädinger P, Knöfel ND, Zovko C, Gamer MT, Weigend F, Kappes MM, Roesky PW. Synthesis and properties of cyclic sandwich compounds. Nature 2023; 620:92-96. [PMID: 37532814 DOI: 10.1038/s41586-023-06192-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 05/10/2023] [Indexed: 08/04/2023]
Abstract
Cyclic nanometre-scale sandwich complexes assembled from individual building blocks were synthesized. Sandwich complexes, in which a metal ion is π-coordinated by two planar aromatic organic rings belong to the foundations of organometallic chemistry. They have been successfully used in a wide variety of applications ranging from catalysis, synthesis and electrochemistry to nanotechnology, materials science and medicine1,2. Extending the sandwich structural motif leads to linear multidecker compounds, in which aromatic organic rings and metal atoms are arranged in an alternating fashion. However, the extension to a cyclic multidecker scaffold is unprecedented. Here we show the design, synthesis and characterization of an isomorphous series of circular sandwich compounds, for which the term 'cyclocenes' is suggested. These cyclocenes consist of 18 repeating units, forming almost ideally circular, closed rings in the solid state, that can be described by the general formula [cyclo-MII(μ-η8:η8-CotTIPS)]18 (M = Sr, Sm, Eu; CotTIPS = 1,4-(iPr3Si)2C8H62-). Quantum chemical calculations lead to the conclusion that a unique interplay between the ionic metal-to-ligand bonds, the bulkiness of the ligand system and the energy gain on ring closure, which is crucially influenced by dispersion interactions, facilitate the formation of these cyclic systems. Up to now, only linear one-dimensional multidecker sandwich compounds have been investigated for possible applications such as nanowires3-10. This textbook example of cyclic sandwich compounds is expected to open the door for further innovations towards new functional organometallic materials.
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Affiliation(s)
- Luca Münzfeld
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Sebastian Gillhuber
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Adrian Hauser
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Sergei Lebedkin
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Pauline Hädinger
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Nicolai D Knöfel
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Christina Zovko
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Michael T Gamer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Florian Weigend
- Department of Chemistry, Philipps University of Marburg, Marburg, Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.
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Zhang K, Wu X, Yang J. Transition metal dichalcogenide magnetic atomic chains. NANOSCALE ADVANCES 2022; 4:4905-4912. [PMID: 36381508 PMCID: PMC9642364 DOI: 10.1039/d2na00543c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Reducing the dimensions of a material to the atomic scale endows them with novel properties that are significantly different from their bulk counterparts. A family of stoichiometric transition metal dichalcogenide (TMD) MX2 (M = Ti to Mn, and X = S to Te) atomic chains is proposed. The results reveal that the MX2 atomic chains, the smallest possible nanostructure of a TMD, are lattice-dynamically stable, as confirmed from their phonon spectra and ab initio molecular dynamics simulations. In contrast to their bulk and two-dimensional (2D) counterparts, the TiX2 atomic chains are nonmagnetic semiconductors, while the VX2, CrX2, and MnX2 chains are unipolar magnetic, bipolar magnetic, and antiferromagnetic semiconductors, respectively. In addition, the VX2, CrX2, and MnX2 chains can be converted via carrier doping from magnetic semiconductors to half metals with reversible spin-polarization orientation at the Fermi level. Of these chains, the MnX2 chains exhibit either ferromagnetic or antiferromagnetic half metallicity depending on the injected carrier type and concentration. The diverse and tunable electronic and magnetic properties in the MX2 chains originate, based on crystal field theory, from the occupation of the metal d orbitals and the exchange interaction between the tetrahedrally coordinated metal atoms in the atomic chain. The calculated interaction between the carbon nanotubes and the MX2 chains implies that armchair (7,7) or armchair (8,8) carbon nanotubes are appropriate sheaths for growing MX2 atomic single-chains in a confined channel. This study reveals the diverse magnetic properties of MX2 atomic single-chains and provides a promising building block for nanoscale electronic and spintronic devices.
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Affiliation(s)
- Kai Zhang
- Hefei National Research Center of Physical Sciences at the Microscale, University of Science and Technology of China Hefei Anhui 230026 China
| | - Xiaojun Wu
- Hefei National Research Center of Physical Sciences at the Microscale, University of Science and Technology of China Hefei Anhui 230026 China
- School of Chemistry and Materials Sciences, CAS Key Laboratory of Materials for Energy Conversion, Synergetic Innovation of Quantum Information & Quantum Technology, CAS Center for Excellence in Nanoscience, University of Science and Technology of China Hefei Anhui 230026 China
| | - Jinlong Yang
- Hefei National Research Center of Physical Sciences at the Microscale, University of Science and Technology of China Hefei Anhui 230026 China
- School of Chemistry and Materials Sciences, CAS Key Laboratory of Materials for Energy Conversion, Synergetic Innovation of Quantum Information & Quantum Technology, CAS Center for Excellence in Nanoscience, University of Science and Technology of China Hefei Anhui 230026 China
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Ji J, Guo T, Qian L, Xu X, Yang H, Xie Y, He M, Yao X, Zhang X, Liu Y. Ab Initio Study of Structural, Electronic and Magnetic Properties of TM&(B@C 60) (TM = V, Cr) Sandwich Clusters and Infinite Molecular Wires. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2770. [PMID: 36014635 PMCID: PMC9415518 DOI: 10.3390/nano12162770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
The geometrical structure, electronic and magnetic properties of B-endoped C60 (B@C60) ligand sandwich clusters, TM&(B@C60)2 (TM = V, Cr), and their one-dimensional (1D) infinite molecular wires, [TM&(B@C60)]∞, have been systematically studied using first-principles calculations. The calculations showed that the TM atoms can bond strongly to the pentagonal (η5-coordinated) or hexagonal rings (η6-coordinated) of the endoped C60 ligands, with binding energies ranging from 1.90 to 3.81 eV. Compared to the configurations with contrast-bonding characters, the η6- and η5-coordinated bonding is energetically more favorable for V-(B@C60) and Cr-(B@C60) complexes, respectively. Interestingly, 1D infinite molecular wire [V&(B@C60)-η6]∞ is an antiferromagnetic half-metal, and 1D [Cr&(B@C60)-η5]∞ molecular wire is a ferromagnetic metal. The tunable electronic and magnetic properties of 1D [TM&(B@C60)]∞ SMWs are found under compressive and tensile stains. These findings provide additional possibilities for the application of C60-based sandwich compounds in electronic and spintronic devices.
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Affiliation(s)
- Jie Ji
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Tianxia Guo
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Liyan Qian
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Xiaokang Xu
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Huanning Yang
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Yue Xie
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Maoshuai He
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xiaojing Yao
- College of Physics and Hebei Advanced Thin Film Laboratory, Hebei Normal University, Shijiazhuang 050024, China
| | - Xiuyun Zhang
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
| | - Yongjun Liu
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
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Lv H, Li X, Wu D, Liu Y, Li X, Wu X, Yang J. Enhanced Curie Temperature of Two-Dimensional Cr(II) Aromatic Heterocyclic Metal-Organic Framework Magnets via Strengthened Orbital Hybridization. NANO LETTERS 2022; 22:1573-1579. [PMID: 35148110 DOI: 10.1021/acs.nanolett.1c04398] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Two-dimensional (2D) metal-organic frameworks (MOFs) with room-temperature magnetism are highly desirable but challenging due to the weak superexchange interaction between metal atoms. For this purpose, strengthening the hybridization between metal ion and organic linkage presents an experiment-feasible chemical solution to enhance the Curie temperature. Here, we report three 2D Cr(II) aromatic heterocyclic MOF magnets with enhanced Curie temperature by bridging Cr(II) ions with pyrazine, 1,4-diphosphinine, and 1,4-diarsenin linkers, i.e., Cr(pyz)2, Cr(diphos)2, and Cr(diarse)2, and using first-principles calculations. Our results show that Cr(pyz)2, Cr(diphos)2, and Cr(diarse)2 are ferrimagnetic semiconductors. In particular, the Curie temperature of Cr(pyz)2 is estimated to be about 344 K and could be enhanced to 512 and 437 K in Cr(diphos)2 and Cr(diarse)2 by strengthening the hybridization between Cr ions and organic linkers via d-π* direct exchange interaction. This study presents a prototype to obtain room-temperature magnetism in 2D Cr(II)-based MOF magnets for nanoscale spintronics applications.
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Affiliation(s)
- Haifeng Lv
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiangyang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Daoxiong Wu
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ying Liu
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xingxing Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory for Materials for Energy Conversion, School of Chemistry and Materials Science, CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
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Mallada B, Błoński P, Langer R, Jelínek P, Otyepka M, de la Torre B. On-Surface Synthesis of One-Dimensional Coordination Polymers with Tailored Magnetic Anisotropy. ACS APPLIED MATERIALS & INTERFACES 2021; 13:32393-32401. [PMID: 34227386 DOI: 10.1021/acsami.1c04693] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
One-dimensional (1D) metalloporphyrin polymers can exhibit magnetism, depending on the central metal ion and the surrounding ligand field. The possibility of tailoring the magnetic signal in such nanostructures is highly desirable for potential spintronic devices. We present low-temperature (4.2 K) scanning tunneling microscopy and spectroscopy (LT-STM/STS) in combination with high-resolution atomic force microscopy (AFM) and a density functional theory (DFT) study of a two-step synthetic protocol to grow a robust Fe-porphyrin-based 1D polymer on-surface and to tune its magnetic properties. A thermally assisted Ullmann-like coupling reaction of Fe(III)diphenyl-bromine-porphyrin (2BrFeDPP-Cl) on Au(111) in ultra-high vacuum results in long (up to 50 nm) 1D metal-organic wires with regularly distributed magnetic and (electronically) independent porphyrins units, as confirmed by STM images. Thermally controlled C-H bond activation leads to conformational changes in the porphyrin units, which results in molecular planarization steered by 2D surface confinement, as confirmed by high-resolution AFM images. Spin-flip STS images in combination with DFT self-consistent spin-orbit coupling calculations of porphyrin units with different structural conformations reveal that the magnetic anisotropy of the triplet ground state of the central Fe ion units drops down substantially upon intramolecular rearrangements. These results point out to new opportunities for realizing and studying well-defined 1D organic magnets on surfaces and demonstrate the feasibility of tailoring their magnetic properties.
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Affiliation(s)
- Benjamin Mallada
- Regional Centre of Advanced Technologies and Material, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 783 71 Olomouc, Czech Republic
- Institute of Physics, The Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic
| | - Piotr Błoński
- Regional Centre of Advanced Technologies and Material, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 783 71 Olomouc, Czech Republic
| | - Rostislav Langer
- Regional Centre of Advanced Technologies and Material, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 783 71 Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacký University Olomouc, 78371 Olomouc, Czech Republic
| | - Pavel Jelínek
- Regional Centre of Advanced Technologies and Material, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 783 71 Olomouc, Czech Republic
- Institute of Physics, The Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic
| | - Michal Otyepka
- Regional Centre of Advanced Technologies and Material, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 783 71 Olomouc, Czech Republic
- IT4Innovations, Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava-Poruba,Czech Republic
| | - Bruno de la Torre
- Regional Centre of Advanced Technologies and Material, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 783 71 Olomouc, Czech Republic
- Institute of Physics, The Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic
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8
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Liu Y, Lv H, Wu X. Metal cyclopropenylidene sandwich cluster and nanowire: structural, electronic, and magnetic properties. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:235301. [PMID: 33618336 DOI: 10.1088/1361-648x/abe8a0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
Organometallic sandwich clusters and nanowires can offer prototypes for molecular ferromagnet and nanoscale spintronic devices due to the strong coupling of local magnetic moments in the nanowires direction and experimental feasibility. Here, on the basis of first-principles calculations, we reportTMn(c-C3H2)n+1(TM= Ti, Mn;n= 1-4) sandwich clusters and 1D [TM(c-C3H2)]∞sandwich nanowires building from transitional metal and the smallest aromatic carbene of cyclopropenylidene (c-C3H2). Based on the results of lattice dynamic and thermodynamic studies, we show that the magnetic moment of Mnn(c-C3H2)n+1clusters increases linearly with the number ofn, and 1D [Mn(c-C3H2)]∞nanowire is a stable ferromagnetic semiconductor, which can be converted into half metal with carrier doping. In contrary, both Tin(c-C3H2)n+1and 1D [Ti(c-C3H2)]∞nanowire are nonmagnetic materials. This study reveals the potential application of the [TM(c-C3H2)]∞nanowire in spintronics.
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Affiliation(s)
- Ying Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, CAS Key Laboratory of Materials for Energy Conversion, Hefei, Anhui 230026, People's Republic of China
- CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Haifeng Lv
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, CAS Key Laboratory of Materials for Energy Conversion, Hefei, Anhui 230026, People's Republic of China
- CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, CAS Key Laboratory of Materials for Energy Conversion, Hefei, Anhui 230026, People's Republic of China
- CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
- Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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9
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Ren Y, Wu M. 0D/1D organic ferroelectrics/multiferroics for ultrahigh density integration: Helical hydrogen-bonded chains, multi-mode switching, and proton synaptic transistors. J Chem Phys 2021; 154:044705. [PMID: 33514112 DOI: 10.1063/5.0035745] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
In recent years, room-temperature ferroelectricity has been experimentally confirmed in a series of two-dimensional (2D) materials. Theoretically, for isolated ferroelectricity in even lower dimensions such as 1D or 0D, the switching barriers may still ensure the room-temperature robustness for ultrahigh-density non-volatile memories, which has yet been scarcely explored. Here, we show ab initio designs of 0D/1D ferroelectrics/multiferroics based on functionalized transition-metal molecular sandwich nanowires (SNWs) with intriguing properties. Some functional groups such as -COOH will spontaneously form into robust threefold helical hydrogen-bonded chains around SNWs with considerable polarizations. Two modes of ferroelectric switching are revealed: when the ends of SNWs are not hydrogen-bonded, the polarizations can be reversed via ligand reorientation that will reform the hydrogen-bonded chains and alter their helicity; when both ends are hydrogen-bonded, the polarizations can be reversed via proton transfer without changing the helicity of chains. The combination of those two modes makes the system the smallest proton conductor with a moderate migration barrier, which is lower compared with many prevalent proton-conductors for higher mobility while still ensuring the robustness at ambient conditions. This desirable feature can be utilized for constructing nanoscale artificial ionic synapses that may enable neuromorphic computing. In such a design of synaptic transistors, the migration of protons through those chains can be controlled and continuously change the conductance of MXene-based post-neuron for nonvolatile multilevel resistance. The success of mimicking synaptic functions will make such designs promising in future high-density artificial neutral systems.
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Affiliation(s)
- Yangyang Ren
- School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Menghao Wu
- School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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Lu K, Gao W, Xu M, Sun Y, Li J, Yao X, Liu Y, Zhang X. Spin Transport Properties of One-Dimensional Benzene Ligand Organobimetallic Sandwich Molecular Wires. ACS OMEGA 2020; 5:5534-5539. [PMID: 32201846 PMCID: PMC7081641 DOI: 10.1021/acsomega.0c00206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Organometallic sandwich complexes, composed of cyclic hydrocarbon ligands and transition-metal atoms, display unique physical and chemical properties. In this work, the electronic and spin transport properties of one-dimensional (1D) VBz2 ligand bimetallic sandwich complexes, VBz2-TM (TM = Cr, Mn, and Fe), are systematically investigated using density functional theory and nonequilibrium Green's function method. The results show that all the 1D infinite molecular wires [(VBz2)TM]∞ (TM = Cr-Fe) are found to be thermodynamically stable with high binding energies (∼1.0-3.45 eV). In particular, they are predicted to be ferromagnetic half metals. Moreover, the I-V curves exhibit negative differential resistance for one, two, and three VBz2-TM wires at TM = Cr, Mn, and Fe, respectively, which is of great significance for certain electronic applications. Our findings strongly suggest that the benzene ligand bimetallic sandwich molecular wires are good candidates for potential electronics and spintronics.
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Affiliation(s)
- Keyu Lu
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
| | - Weicheng Gao
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
| | - Mingxia Xu
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
| | - Yi Sun
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
| | - Jie Li
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
| | - Xiaojing Yao
- Department
of Physics, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China
| | - Yongjun Liu
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
| | - Xiuyun Zhang
- College
of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China
- Shandong
Key Laboratory of Biochemical Analysis; College of Chemistry and Molecular
Engineering, Qingdao University of Science
and Technology, Qingdao 266042, PR China
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11
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Zhang LC, Zhang L, Qin G, Zheng QR, Hu M, Yan QB, Su G. Two-dimensional magnetic metal-organic frameworks with the Shastry-Sutherland lattice. Chem Sci 2019; 10:10381-10387. [PMID: 32110327 PMCID: PMC6988603 DOI: 10.1039/c9sc03816g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 09/24/2019] [Indexed: 01/05/2023] Open
Abstract
Mn-PBP is discovered to be the first ferromagnetic 2D MOF with the Shastry-Sutherland lattice and the predicted Curie temperature is 105 K.
Inspired by the successful synthesis of Fe/Cu-5,5′-bis(4-pyridyl)(2,2′-bipirimidine) (PBP), a family of two-dimensional (2D) metal–organic frameworks (MOFs) with the Shastry-Sutherland lattice, i.e., transition metal (TM)-PBP (TM = Cr, Mn, Fe, Co, Ni, Cu, Zn) has been systematically investigated by means of first-principles density functional theory calculations and Monte Carlo simulations. Mn-PBP is discovered to be the first ferromagnetic 2D MOF with the Shastry-Sutherland lattice and the Curie temperature is predicted to be about 105 K, while Fe-PBP, TM-PBP (TM = Cr, Co, Ni) and TM-PBP (TM = Cu, Zn) are found to be stripe-order antiferromagnetic, magnetic-dimerized and nonmagnetic, respectively. The electronic structure calculations reveal that TM-PBP MOFs are semiconductors with band gaps ranging from 0.12 eV to 0.85 eV, which could be easily modulated by various methods. Particularly, Mn-PBP would exhibit half-metallic behavior under compressive strain or appropriate electron/hole doping and a Mn-PBP based spintronic device has been proposed. This study not only improves the understanding of the geometric, electronic and magnetic properties of the 2D TM-PBP MOF family, but also provides a novel spin lattice playground for the research of 2D magnetic systems, which has diverse modulating possibilities and rich potential applications.
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Affiliation(s)
- Li-Chuan Zhang
- Center of Materials Science and Optoelectronics Engineering , College of Materials Science and Opto-Electronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , China . .,Peter Grünberg Institut and Institute for Advanced Simulation , Forschungszentrum Jülich , JARA , 52425 Jülich , Germany.,Department of Physics , RWTH Aachen University , 52056 Aachen , Germany
| | - Lizhi Zhang
- Department of Physics and Astronomy , University of Tennessee , Knoxville , Tennessee 37916 , USA
| | - Guangzhao Qin
- Department of Mechanical Engineering , University of South Carolina , Columbia , SC 29208 , USA .
| | - Qing-Rong Zheng
- School of Physics , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Ming Hu
- Department of Mechanical Engineering , University of South Carolina , Columbia , SC 29208 , USA .
| | - Qing-Bo Yan
- Center of Materials Science and Optoelectronics Engineering , College of Materials Science and Opto-Electronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , China .
| | - Gang Su
- School of Physics , University of Chinese Academy of Sciences , Beijing 100049 , China.,CAS Center for Excellence in Topological Quantum Computation , Kavli Institute for Theoretical Sciences , University of Chinese Academy of Sciences , Beijing 100190 , China .
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12
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Shao P, Ding LP, Luo DB, Lu C. Probing the structural, bonding, electronic and magnetic properties of transition–metal borazine systems: Com(borazine)n (m = 1, 2; n = 1–3). Mol Phys 2019. [DOI: 10.1080/00268976.2019.1667542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Peng Shao
- Department of Physics, Shaanxi University of Science & Technology, Xi’an, People’s Republic of China
| | - Li Ping Ding
- Department of Physics, Shaanxi University of Science & Technology, Xi’an, People’s Republic of China
| | - Dao-Bin Luo
- Department of Physics, Shaanxi University of Science & Technology, Xi’an, People’s Republic of China
| | - Cheng Lu
- Department of Physics, Nanyang Normal University, Nanyang, People’s Republic of China
- Department of Physics and High Pressure Science and Engineering Center, University of Nevada, Las Vegas, NV, USA
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13
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Li X, Yang J. Computational Design of One‐Dimensional Ferromagnetic Semiconductors in Transition Metal Embedded Stannaspherene Nanowires. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xingxing Li
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum PhysicsUniversity of Science and Technology of China Hefei Anhui 230026 China
| | - Jinlong Yang
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum PhysicsUniversity of Science and Technology of China Hefei Anhui 230026 China
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14
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Gao W, Yao X, Sun Y, Sun W, Liu H, Liu J, Liu Y, Zhang X. Theoretical Study on Sandwich-Like Transition-Metal-Cyclooctatetraene Clusters and One-Dimensional Infinite Molecular Wires. ACS OMEGA 2019; 4:9739-9744. [PMID: 31460064 PMCID: PMC6648966 DOI: 10.1021/acsomega.9b00637] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 05/09/2019] [Indexed: 06/10/2023]
Abstract
Using density functional theory calculations, we investigated the structure and electronic properties of cyclooctatetraene (C8H8, COT)-ligand mono- or bi-transition-metal (M) sandwich clusters, M n (COT) n+1 (M = Sc, Ti, Cr, Mn, n = 1, 2) or (COT)M1(COT)M2(COT), as well as their one-dimensional infinite molecular wires. All the sandwich M-COT clusters and molecular wires are rather stable with their binding energies ranging from 3.20 to 7.48 eV per transition-metal atom. Superior to M n Bz n+1 complexes, most sandwich M-COT complexes are in their high spin states with ultrahigh magnetic moments. Moreover, one-dimensional infinite molecular wires, [Cr(COT)]∞, [(COT)V(COT)Ti]∞ and [(COT)Sc(COT)Cr]∞, are predicted to be ferromagnetic half-metals. Our findings suggest that such M-COT sandwich complexes may be potential candidates for applications in spintronics.
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Affiliation(s)
- Weicheng Gao
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
| | - Xiaojing Yao
- College of Physics Science and Information Engineering, Hebei Normal University, No. 20 Road East. 2nd Ring South, Yuhua District, Shijiazhuang 050024, China
| | - Yi Sun
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
| | - Weikang Sun
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
| | - Hongfei Liu
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
| | - Jianshuang Liu
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
| | - Yongjun Liu
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
| | - Xiuyun Zhang
- College of Physics
Science and Technology, Yangzhou University, No.180 Siwangting Road, Yangzhou 225002, China
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15
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Niaz S, Pandith AH. Transition‐Metal‐Based Multidecker Complexes as Hydrogen Storage Materials: A Theoretical Study. ChemistrySelect 2019. [DOI: 10.1002/slct.201900372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Saba Niaz
- Department of ChemistryUniversity of Kashmir Srinagar - 190006, J&K India
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16
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Li SS, Wang YP, Hu SJ, Chen D, Zhang CW, Yan SS. Robust half-metallicity in transition metal tribromide nanowires. NANOSCALE 2018; 10:15545-15552. [PMID: 30087972 DOI: 10.1039/c8nr03322f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
One-dimensional (1D) nanowires (NWs) with robust half-metallicity are a rising star in spintronics. Herein, we theoretically investigate the magnetic and electronic properties of 3d transition-metal tribromide NWs, i.e. TMBr3 (TM = Sc, Ti, V, Cr, Co, and Cu). These systems represent repeated TMBr3 motifs with octahedral configuration, and are expected to be synthesized in a nanotube using an established method. Among these NWs, both VBr3 and CuBr3 NWs exhibit a ferromagnetic (FM) ground state, accompanied by sizable magnetocrystalline anisotropic energy, which is dominated by the superexchange coupling between the TM atoms. Strikingly, a half-metallic nature with a magnetic moment of 4.0μB per unit cell is predicted for the VBr3 NW. By combining with a tight-binding model, we demonstrate that the origin behind the half-metallicity is the half-filled e2 orbitals of the V atoms. The Curie temperature is evaluated to be up to 80 K using Monte Carlo simulations, which is comparable to the temperature of liquid nitrogen. We also find that the half-metallic behavior shows a favorable tolerance to the longitudinal elongation of the wire (∼10%). Additionally, a transition from FM semiconductor to half-metal can be realized in the CuBr3 NW through carrier doping. The coexistence of intrinsic high-temperature FM ordering and half-metallicity endows 1D TMBr3 NWs with great promise for spintronic and photoelectron device applications.
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Affiliation(s)
- Sheng-Shi Li
- School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, P. R. China.
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17
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Zhao P, Li J, Jin H, Yu L, Huang B, Ying D. Designing lateral spintronic devices with giant tunnel magnetoresistance and perfect spin injection efficiency based on transition metal dichalcogenides. Phys Chem Chem Phys 2018; 20:10286-10291. [DOI: 10.1039/c8cp00557e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A robust spin-filtering device based on two-dimensional TMDs.
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Affiliation(s)
- Pei Zhao
- School of Physics, State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Jianwei Li
- College of Physics and Energy
- Shenzhen Key Laboratory of Advanced Thin Films and Applications
- Shenzhen University
- Shenzhen 518060
- People's Republic of China
| | - Hao Jin
- College of Physics and Energy
- Shenzhen Key Laboratory of Advanced Thin Films and Applications
- Shenzhen University
- Shenzhen 518060
- People's Republic of China
| | - Lin Yu
- School of Physics, State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Baibiao Huang
- School of Physics, State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Dai Ying
- School of Physics, State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- People's Republic of China
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18
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Thi Thu Huong V, Tai TB, Jiang JC, Nguyen MT. Spin-polarized transport properties in some transition metal dithiolene complexes. Phys Chem Chem Phys 2017; 19:32536-32543. [PMID: 29188831 DOI: 10.1039/c7cp05962k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin filtering materials are of great current interest in part due to their applications in molecular electronics. In this study, we carried out a theoretical investigation on the charge transport properties of transition metal (TM) dithiolene complexes with TM = Ni, Fe and Mn by using non-equilibrium Green's function/density functional theory (NEGF-DFT) methods. The characteristics of current-voltage and spin-resolved transmission spectra pointed out that Ni complexes are non-polarized, while Fe and Mn complexes exhibit high polarization and can be regarded as excellent candidates for spin-filtering materials with high spin-filtering efficiency. These differences were rationalized on the basis of electron delocalization over the molecular junction of the partial distribution of α- and β-spin molecular projected self-consistent Hamiltonian (MPSH) orbitals, and also the first eigenchannels of molecular junctions.
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Affiliation(s)
- Vu Thi Thu Huong
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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19
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Tong Y, Guo Y, Mu K, Shan H, Dai J, Liu Y, Sun Z, Zhao A, Zeng XC, Wu C, Xie Y. Half-Metallic Behavior in 2D Transition Metal Dichalcogenides Nanosheets by Dual-Native-Defects Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1703123. [PMID: 28861927 DOI: 10.1002/adma.201703123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/30/2017] [Indexed: 06/07/2023]
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) have been regarded as one of the best nonartificial low-dimensional building blocks for developing spintronic nanodevices. However, the lack of spin polarization in the vicinity of the Fermi surface and local magnetic moment in pristine TMDs has greatly hampered the exploitation of magnetotransport properties. Herein, a half-metallic structure of TMDs is successfully developed by a simple chemical defect-engineering strategy. Dual native defects decorate titanium diselenides with the coexistence of metal-Ti-atom incorporation and Se-anion defects, resulting in a high-spin-polarized current and local magnetic moment of 2D Ti-based TMDs toward half-metallic room-temperature ferromagnetism character. Arising from spin-polarization transport, the as-obtained T-TiSe1.8 nanosheets exhibit a large negative magnetoresistance phenomenon with a value of -40% (5T, 10 K), representing one of the highest negative magnetoresistance effects among TMDs. It is anticipated that this dual regulation strategy will be a powerful tool for optimizing the intrinsic physical properties of TMD systems.
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Affiliation(s)
- Yun Tong
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yuqiao Guo
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Kejun Mu
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Huan Shan
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Jun Dai
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Yi Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zhe Sun
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Aidi Zhao
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiao Cheng Zeng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Changzheng Wu
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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20
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Tao LL, Wang J. Giant magnetoresistance and perfect spin filter effects in manganese phthalocyanine based molecular junctions. NANOSCALE 2017; 9:12684-12689. [PMID: 28828430 DOI: 10.1039/c7nr03532b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The spin-filter transport and magnetoresistance effects are of particular interest in the field of molecular spintronics. In this work, based on first-principles quantum transport calculations, we report on the spin-dependent transport properties of a molecular junction made of two manganese phthalocyanine (MnPc) molecules linked by single-walled carbon nanotubes. Owing to the half-metallicity of MnPc around the Fermi energy, a perfect spin-filter effect and a giant magnetoresistance effect are observed in the molecular junction. The current-voltage characteristics show nearly ohmic behavior for the junction in an anti-parallel magnetic configuration, while a very low-bias negative differential resistance effect is observed for the junction in a parallel magnetic configuration. The results are well understood from the analysis of molecular frontier orbitals, scattering states and transmission spectra. Our results provide some fundamental understanding of spin-dependent transport in molecular junctions that are useful for the design of future spintronic devices.
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Affiliation(s)
- L L Tao
- Department of Physics and the Center of Theoretical and Computational Physics, The University of Hong Kong, Hong Kong, China.
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21
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Ketkov SY, Tzeng SY, Wu PY, Markin GV, Tzeng WB. DFT-Supported Threshold Ionization Study of Chromium Biphenyl Complexes: Unveiling the Mechanisms of Substituent Influence on Redox Properties of Sandwich Compounds. Chemistry 2017; 23:13669-13675. [DOI: 10.1002/chem.201702226] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Sergey Yu. Ketkov
- G.A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin St. 49, GSP-445 Nizhny Novgorod 603950 Russian Federation
| | - Sheng-Yuan Tzeng
- Institute of Atomic and Molecular Sciences; Academia Sinica, 1 Section 4; Roosevelt Road Taipei 6017 Taiwan
| | - Pei-Ying Wu
- Institute of Atomic and Molecular Sciences; Academia Sinica, 1 Section 4; Roosevelt Road Taipei 6017 Taiwan
| | - Gennady V. Markin
- G.A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin St. 49, GSP-445 Nizhny Novgorod 603950 Russian Federation
| | - Wen-Bih Tzeng
- Institute of Atomic and Molecular Sciences; Academia Sinica, 1 Section 4; Roosevelt Road Taipei 6017 Taiwan
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22
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Li X, Lv H, Dai J, Ma L, Zeng XC, Wu X, Yang J. Half-Metallicity in One-Dimensional Metal Trihydride Molecular Nanowires. J Am Chem Soc 2017; 139:6290-6293. [DOI: 10.1021/jacs.7b01369] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiuling Li
- CAS
Key Laboratory of Materials for Energy Conversion, School of Chemistry
and Materials Sciences, CAS Center for Excellence in Nanoscience,
and Hefei National Laboratory of Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
- Department
of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Haifeng Lv
- CAS
Key Laboratory of Materials for Energy Conversion, School of Chemistry
and Materials Sciences, CAS Center for Excellence in Nanoscience,
and Hefei National Laboratory of Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jun Dai
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Liang Ma
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Xiao Cheng Zeng
- CAS
Key Laboratory of Materials for Energy Conversion, School of Chemistry
and Materials Sciences, CAS Center for Excellence in Nanoscience,
and Hefei National Laboratory of Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Xiaojun Wu
- CAS
Key Laboratory of Materials for Energy Conversion, School of Chemistry
and Materials Sciences, CAS Center for Excellence in Nanoscience,
and Hefei National Laboratory of Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Synergetic Innovation of Quantum Information & Quantum Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
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23
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Li X, Yang J. Low-dimensional half-metallic materials: theoretical simulations and design. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2017. [DOI: 10.1002/wcms.1314] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xingxing Li
- Hefei National Laboratory for Physical Sciences at the Microscale; University of Science and Technology of China; Hefei China
- Synergetic Innovation Center of Quantum Information & Quantum Physics; University of Science and Technology of China; Hefei China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale; University of Science and Technology of China; Hefei China
- Synergetic Innovation Center of Quantum Information & Quantum Physics; University of Science and Technology of China; Hefei China
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24
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Fetisov EO, Gloriozov IP, Nechaev MS, Kahlal S, Saillard JY, Oprunenko YF. Thermally induced inter-ring haptotropic rearrangements in π-complexes of molybdenum with nitrogen containing polyaromatic heterocycles: A DFT study. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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25
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Shekar SC, Kumar Meena S, Swathi RS. Interlocked benzenes in triangular π-architectures: anchoring groups dictate ion binding and transmission. Phys Chem Chem Phys 2017; 19:10264-10273. [DOI: 10.1039/c6cp08898h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Graphynes and graphenylenes – potential materials for lithium ion batteries.
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Affiliation(s)
- S. Chandra Shekar
- School of Chemistry
- Centre for Computation
- Modelling and Simulation (CCMS)
- Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM)
- India
| | - Sanjay Kumar Meena
- School of Chemistry
- Centre for Computation
- Modelling and Simulation (CCMS)
- Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM)
- India
| | - R. S. Swathi
- School of Chemistry
- Centre for Computation
- Modelling and Simulation (CCMS)
- Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM)
- India
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26
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Karolak M, Jacob D. Effects of valence, geometry and electronic correlations on transport in transition metal benzene sandwich molecules. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:445301. [PMID: 27605217 DOI: 10.1088/0953-8984/28/44/445301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We study the impact of the valence and the geometry on the electronic structure and transport properties of different transition metal-benzene sandwich molecules bridging the tips of a Cu nanocontact. Our density-functional calculations show that the electronic transport properties of the molecules depend strongly on the molecular geometry which can be controlled by the nanocontact tips. Depending on the valence of the transition metal center certain molecules can be tuned in and out of half-metallic behaviour facilitating potential spintronics applications. We also discuss our results in the framework of an Anderson impurity model, indicating cases where the inclusion of local correlations alters the ground state qualitatively. For Co and V centered molecules we find indications of an orbital Kondo effect.
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Affiliation(s)
- M Karolak
- Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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Masubuchi T, Iwasa T, Nakajima A. Multiple-decker and ring sandwich formation of manganese-benzene organometallic cluster anions: Mn nBz n- (n = 1-5 and 18). Phys Chem Chem Phys 2016; 18:26049-26056. [PMID: 27711615 DOI: 10.1039/c6cp05380g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organometallic multiple-decker sandwich clusters are topics of great interest due to their unique electronic and magnetic properties originating from anisotropic structures. We report a joint anion photoelectron spectroscopic and computational study on a new family of manganese (Mn)-benzene (Bz) anionic clusters MnnBzn-. In stark contrast to the most widely studied vanadium-Bz sandwich clusters, it is found that MnnBzn- (n = 1-5) clusters exhibit unprecedented multiple-decker structures with a tilted Mn-Bz stacking and a monotonically increasing behavior of their high spin multiplicities. Furthermore, a couple of closed ring forms of Mn18Bz18- and its neutral state are computationally anticipated as an intriguing "cluster of Mn1Bz1 clusters" in which the neutral Mn18Bz18 has extremely high C18h symmetry with an uncommon spin state of 2S + 1 = 55. The extensively delocalized electron environment of Mn18Bz18 allows the simple Hückel model to reveal the strong intra-atomic exchange interactions within the Mn 3d electrons.
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Affiliation(s)
- Tsugunosuke Masubuchi
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
| | - Takeshi Iwasa
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. and JST, ERATO, Nakajima Designer Nanocluster Assembly Project, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
| | - Atsushi Nakajima
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. and JST, ERATO, Nakajima Designer Nanocluster Assembly Project, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan and Keio Institute of Pure and Applied Sciences (KiPAS), Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Wang X, Wang Q, Yuan C, Zhao XF, Li JJ, Li D, Wu YB, Wang X. The degree of π electron delocalization and the formation of 3D-extensible sandwich structures. Phys Chem Chem Phys 2016; 18:11942-50. [PMID: 27004750 DOI: 10.1039/c5cp07372c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
DFT B3LYP/6-31G(d) calculations were performed to examine the feasibility of graphene-like C42H18 and starbenzene C6(BeH)6 (SBz) polymers as ligands of 3D-extensible sandwich compounds (3D-ESCs) with uninterrupted sandwich arrays. The results revealed that sandwich compounds with three or more C42H18 ligands were not feasible. The possible reason may be the localization of π electrons on certain C6 hexagons due to π-metal interactions, which makes the whole ligand lose its electronic structure basis (higher degree of π electron delocalization) to maintain the planar structure. For comparison, with the aid of benzene (Bz) molecules, the SBz polymers can be feasible ligands for designing 3D-ESCs because the C-Be interactions in individual SBz are largely ionic, which will deter the π electrons on one C6 ring from connecting to those on neighbouring C6 rings. This means that high degree of π electron delocalization is not necessary for maintaining the planarity of SBz polymers. Such a locally delocalized π electron structure is desirable for the ligands of 3D-ESCs. Remarkably, the formation of a sandwich compound with SBz is thermodynamically more favourable than that found for bis(Bz)chromium. The assembly of 3D-ESCs is largely exothermic, which will facilitate future experimental synthesis. The different variation trends on the HOMO-LUMO gaps in different directions (relative to the sandwich axes) suggest that they can be developed to form directional conductors or semiconductors, which may be useful in the production of electronic devices.
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Affiliation(s)
- Xiang Wang
- Key Laboratory of Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
| | - Qiang Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, The Chinese Academy of Sciences, Taiyuan, Shanxi 030001, People's Republic of China
| | - Caixia Yuan
- Key Laboratory of Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
| | - Xue-Feng Zhao
- Key Laboratory of Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
| | - Jia-Jia Li
- Key Laboratory of Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
| | - Debao Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, The Chinese Academy of Sciences, Taiyuan, Shanxi 030001, People's Republic of China
| | - Yan-Bo Wu
- Key Laboratory of Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
| | - Xiaotai Wang
- Department of Chemistry, University of Colorado Denver, Campus Box 194, P.O. Box 173364, Denver, Colorado 80217-3364, USA
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Abstract
Abstract
Spintronics is one of the most promising next generation information technology, which uses the spins of electrons as information carriers and possesses potential advantages of speeding up data processing, high circuit integration density, and low energy consumption. However, spintronics faces a number of challenges, including spin generation and injection, long distance spin transport, and manipulation and detection of spin orientation. In solving these issues, new concepts and spintronics materials were proposed one after another, such as half metals, spin gapless semiconductors, and bipolar magnetic semiconductors. Topological insulators can also be viewed as a special class of spintronics materials, with their surface states used for pure spin generation and transportation. In designing these spintronics materials, first-principles calculations play a very important role. This article attempts to give a brief review of the basic principles and theoretical design of these materials. Meanwhile, we also give some attentions to the antiferromagnetic spintronics, which is mainly based on antiferromagnets and has aroused much interest in recent years.
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Affiliation(s)
- Xingxing Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
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Gan T, Zhang G, Shang Y, Su X, Yang ZD, Sun X. Electronic and transport properties of the (VBz)n@MoS2NT nanocable. Phys Chem Chem Phys 2016; 18:4385-93. [PMID: 26790537 DOI: 10.1039/c5cp07315d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The electronic structure of a novel inorganic (8, 8) MoS2 nanotube nanocable, (VBz)n@MoS2NT, (where Bz refers as C6H6), is investigated using density functional theory. Transport property calculations are further performed employing non-equilibrium Green's function methods by modeling a two-probe device with a finite-sized nanocable sandwiched between two electrodes of its own. It is found that the transport properties of the nanocable agree well with its electronic structure. The core (VBz)n nanowire in the (VBz)n@MoS2NT plays a significant role in electron transportation, meanwhile, the sheath MoS2NT also participates in electron transportation. This phenomenon is different from those of (VBz)n@CNT and (VBz)n@BNNT nanocables. For the (VBz)n@CNT, the transport properties are majorly dominated by the metallic CNT sheath, while for the (VBz)n@BNNT, it is merely decided by the core (VBz)n. The conductivity of the (VBz)n@MoS2NT is slightly better in comparison with pure (VBz)n. Similar to pure (VBz)n, the (VBz)n@MoS2NT shows spin-polarized transport properties: the spin-down state gives a higher conductivity than the spin-up state. The values of the spin filter efficiency of the (VBz)n@MoS2NT can be up to >80%, indicating it to be a good candidate for spin filters. In addition, it is also found that encapsulating (VBz)n into the MoS2NT could introduce magnetism. More importantly, the ferromagnetic (VBz)n@MoS2NT is thermally rather stable. Therefore, encapsulating (VBz)n into the MoS2NT can effectively tune the electronic and transport properties for exploring novel functional nanodevices.
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Affiliation(s)
- Tian Gan
- College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Guiling Zhang
- College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Yan Shang
- College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Xiaohong Su
- Heilongjiang Polytechnic, Harbin 150080, China
| | - Zhao-Di Yang
- College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Xiaojun Sun
- College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China.
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Ketkov SY, Markin GV, Tzeng SY, Tzeng WB. Fine Substituent Effects in Sandwich Complexes: A Threshold Ionization Study of Monosubstituted Chromium Bisarene Compounds. Chemistry 2016; 22:4690-4. [DOI: 10.1002/chem.201505039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Sergey Yu. Ketkov
- G. A. Razuvaev Institute of Organometallic Chemistry; RAS; Tropinin St. 49, GSP-445 Nizhny Novgorod 603950 Russian Federation
| | - Gennady V. Markin
- G. A. Razuvaev Institute of Organometallic Chemistry; RAS; Tropinin St. 49, GSP-445 Nizhny Novgorod 603950 Russian Federation
| | - Sheng Y. Tzeng
- Institute of Atomic and Molecular Sciences, Academia Sinica; 1 Section 4, Roosevelt Road Taipei 6017 Taiwan
| | - Wen B. Tzeng
- Institute of Atomic and Molecular Sciences, Academia Sinica; 1 Section 4, Roosevelt Road Taipei 6017 Taiwan
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Yan X, Li X, Sun Z, Li Q, Meng L. Dinuclear first-row transition metal–(C8Me6)2complexes: metal–metal and metal–ligand bonds determined by the d electron configuration of the metal atom. NEW J CHEM 2016. [DOI: 10.1039/c5nj02469b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The nature and strength of the metal–metal and metal–ligand bonds depend on the d electron configuration of the transition metal.
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Affiliation(s)
- Xiuli Yan
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
- Key Laboratory of Inorganic Nano-materials of Hebei Province
| | - Xiaoyan Li
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
- Key Laboratory of Inorganic Nano-materials of Hebei Province
| | - Zheng Sun
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
- Key Laboratory of Inorganic Nano-materials of Hebei Province
| | - Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry
- Science and Engineering College of Chemistry and Biology
- Yantai University
- Yantai
- China
| | - Lingpeng Meng
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
- Key Laboratory of Inorganic Nano-materials of Hebei Province
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33
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Shang Y, Sun C, Zhang G, Yang Z, Wang X. Electronic and transport properties of [V(Bz) 2] n@SWCNT and [V(Bz) 2] n@DWCNT nanocables. RSC Adv 2016. [DOI: 10.1039/c6ra08222j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Novel nanocables with [V(Bz)2]n inside SWCNT and DWCNT.
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Affiliation(s)
- Yan Shang
- College of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Cuicui Sun
- College of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Guiling Zhang
- College of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Zhaodi Yang
- College of Chemical and Environmental Engineering
- Harbin University of Science and Technology
- Harbin 150040
- China
| | - Xin Wang
- College of Chemistry
- Sichuan University
- Chengdu
- China
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Ideal Spintronics in Molecule-Based Novel Organometallic Nanowires. Sci Rep 2015; 5:12772. [PMID: 26239021 PMCID: PMC4523865 DOI: 10.1038/srep12772] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 07/09/2015] [Indexed: 01/11/2023] Open
Abstract
With the purpose of searching for new intriguing nanomaterial for spintronics, a series of novel metalloporphyrin nanowires (M-PPNW, M = Cr, Mn, Fe, Co, Ni, Cu and Zn) and hybrid nanowires fabricated by metalloporphyrin and metal-phthalocyanine (M-PCNW) are systematically investigated by means of first-principles calculations. Our results indicate that the transition metal atoms (TMs) embedded in the frameworks distribute regularly and separately, without any trend to form clusters, thus leading to the ideally ordered spin distribution. Except for the cases embedded with Ni and Zn, the others are spin-polarized. Remarkably, the Mn-PPNW, Mn-PCNW, MnCu-PPNW, MnCr-PCNW, and MnCu-PCNW frameworks all favor the long-ranged ferromagnetic spin ordering and display half-metallic nature, which are of greatest interest and importance for electronics and spintronics. The predicted Curie temperature for the Mn-PCNW is about 150 K. In addition, it is found that the discrepancy in magnetic coupling for these materials is related to the competition mechanisms of through-bond and through-space exchange interactions. In the present work, we propose not only two novel sets of 1D frameworks with appealing magnetic properties, but also a new strategy in obtaining the half-metallic materials by the combination of different neighboring TMs.
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35
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Masubuchi T, Iwasa T, Nakajima A. Experimental and theoretical studies of the structural and electronic properties of vanadium-benzene sandwich clusters and their anions: V(n)Bz(n)(0/-) (n = 1-5) and V(n)Bz(n-1)(0/-) (n = 2-5). J Chem Phys 2014; 141:214304. [PMID: 25481141 DOI: 10.1063/1.4902367] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
One end open V(n)Bz(n)(-) (n = 1-5; Bz = benzene) and both ends open V(n)Bz(n-1)(-) (n = 2-5) vanadium-benzene cluster anions were studied using anion photoelectron spectroscopy and density functional calculations. The smaller (n ≤ 3) V(n)Bz(n) and V(n)Bz(n-1) clusters and corresponding anions were found to have structural isomers, whereas full-sandwiched V(n)Bz(n+1) clusters preferred to form multiple-decker sandwich structures. Several isomeric V2Bz2 structures were identified theoretically and the anion photoelectron spectra of V2Bz2(0/-) were explained well by the coexistence of two isomeric structures: (1) a V2-core structure sandwiched between benzene molecules and (2) an alternating sandwich structure with the spin state strongly dependent on the structure. The adiabatic electron affinity of both V(n)Bz(n) and V(n)Bz(n-1) was found to increase with the cluster size at larger sizes (n = 4 or 5) and approaches to that of V(n)Bz(n+1). The evolution of the structural and electronic properties of V(n)Bz(m) and V(n)Bz(m)(-) (m = n and n - 1) with size is discussed in comparison with V(n)Bz(n+1) and V(n)Bz(n+1)(-).
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Affiliation(s)
- Tsugunosuke Masubuchi
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takeshi Iwasa
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Atsushi Nakajima
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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36
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Li D, Zhang S, Liu J, Tang C. Vanadium Sandwich Complexes with Boroxine and Boronyl Boroxine Ligands. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402258] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Da‐Zhi Li
- Binzhou Key Laboratory of Material Chemistry, Department of Chemistry and Chemical Engineering, Binzhou University Binzhou 256603, People's Republic of China, http://hgx.bzu.edu.cn/
| | - Shi‐Guo Zhang
- Binzhou Key Laboratory of Material Chemistry, Department of Chemistry and Chemical Engineering, Binzhou University Binzhou 256603, People's Republic of China, http://hgx.bzu.edu.cn/
| | - Jun‐jie Liu
- Binzhou Key Laboratory of Material Chemistry, Department of Chemistry and Chemical Engineering, Binzhou University Binzhou 256603, People's Republic of China, http://hgx.bzu.edu.cn/
| | - Cui Tang
- Binzhou Key Laboratory of Material Chemistry, Department of Chemistry and Chemical Engineering, Binzhou University Binzhou 256603, People's Republic of China, http://hgx.bzu.edu.cn/
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Aguilera-Granja F, Aguilera-del-Toro RH, Vega A, Balbás LC. Structural and Electronic Properties of TMn[(BN)3H6]m Complexes with TM = Co (n, m = 1–3) and with TM = Fe, Ni, Ru, Rh, Pd (n = m = 1–3). J Phys Chem A 2014; 118:2976-83. [DOI: 10.1021/jp500191v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- F. Aguilera-Granja
- Instituto de Fı́sica, Universidad Autónoma de San Luis Potosı́, San Luis Potosı́, México
| | | | - A. Vega
- Departamento
de Fı́sica Teórica, Universidad de Valladolid, 47011 Valladolid, Spain
| | - L. C. Balbás
- Departamento
de Fı́sica Teórica, Universidad de Valladolid, 47011 Valladolid, Spain
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38
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Yang Z, Zhang B, Liu X, Li X, Yang Y, Xiong S, Xu B. Size-dependent magnetic order and giant magnetoresistance in organic titanium-benzene multidecker cluster. Phys Chem Chem Phys 2014; 16:1902-8. [PMID: 24336893 DOI: 10.1039/c3cp54352h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Using density functional theory and non-equilibrium Green's function method, we investigated the magnetic and transport properties of small organic titanium-benzene sandwich clusters TinBzn+1 (n = 1-3). The results show that TiBz2 is nonmagnetic while Ti2Bz3 and Ti3Bz4 are ferromagnetic, and our prediction is in agreement with experimental observation. The double exchange mechanism plays a key role in the ferromagnetism of larger clusters. With Ni as the two electrodes, significant spin-filter efficiency (SFE) and giant magnetoresistance (GMR) were found in the TinBzn+1 molecular junction. These transport properties could be controlled by cluster size, bias voltage or gate voltage. Specially, a sign-reversible GMR effect was observed in the Ti2Bz3 molecular junction. Finally, the microscopic mechanisms of SFE and GMR were suggested.
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Affiliation(s)
- Zhi Yang
- Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
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Ketkov S, Isachenkov N, Rychagova E, Tzeng WB. Electronic excited states of chromium and vanadium bisarene complexes revisited: interpretation of the absorption spectra on the basis of TD DFT calculations. Dalton Trans 2014; 43:17703-11. [DOI: 10.1039/c4dt01481b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of the (η6-arene)2M (M = Cr, V, Cr+) composition on parameters of intravalency and Rydberg transitions is explained on the basis of time-dependent DFT.
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Affiliation(s)
- Sergey Ketkov
- G.A. Razuvaev Institute of Organometallic Chemistry RAS
- Nizhny Novgorod 603950, Russian Federation
- Nizhny Novgorod State University
- Nizhny Novgorod 603950, Russian Federation
| | - Nikolai Isachenkov
- G.A. Razuvaev Institute of Organometallic Chemistry RAS
- Nizhny Novgorod 603950, Russian Federation
| | - Elena Rychagova
- G.A. Razuvaev Institute of Organometallic Chemistry RAS
- Nizhny Novgorod 603950, Russian Federation
- Nizhny Novgorod State University
- Nizhny Novgorod 603950, Russian Federation
| | - Wen-Bih Tzeng
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617, Taiwan
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40
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Yang XF, Liu YS, Zhang X, Zhou LP, Wang XF, Chi F, Feng JF. Perfect spin filtering and large spin thermoelectric effects in organic transition-metal molecular junctions. Phys Chem Chem Phys 2014; 16:11349-55. [DOI: 10.1039/c4cp00390j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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41
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Pan L, Song B, Sun J, Zhang L, Hofer W, Du S, Gao HJ. The origin of half-metallicity in conjugated electron systems--a study on transition-metal-doped graphyne. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:505502. [PMID: 24275545 DOI: 10.1088/0953-8984/25/50/505502] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We studied the mechanism of half-metallicity (HM) formation in transition-metal-doped conjugated carbon based structures by first-principles electronic structure simulations. It is found that the HM is a rather complex phenomenon, determined by the ligand field splitting of d-orbitals of the transition metal atoms, the exchange splitting and the number of valence electrons. Since most of the conjugated carbon based structures possess ligands with intermediate strength, the ordering of the d-orbital splitting is similar in all structures, and the HM properties evolve according to the number of valence electrons. Based on this insight we predict that Cr-, Fe- and Co-doped graphyne will show HM, while Mn- and Ni-doped graphyne will not. By tuning the number of valence electrons, we are thus able to control the emergence of HM and control the energy gaps evolving in the majority or minority spin channels.
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Affiliation(s)
- Lida Pan
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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42
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Ma Y, Dai Y, Li X, Li Z, Huang B. First-principles study of one-dimensional sandwich wires [(P)₅TM]∞ (TM = Ti, V, Cr, Mn, Fe, Co). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:395503. [PMID: 24002217 DOI: 10.1088/0953-8984/25/39/395503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Since the discovery of ferrocene, many one-dimensional metallic sandwich molecular wires have been identified. However, most of the known systems are assembled from organic molecules. Suffering from many drawbacks has, however, hampered their widespread applications. With the goal of breaking this logjam, we provide a blueprint for the designing of a variety of novel sandwich molecular wires ([(P)5TM]∞, TM = Ti, V, Cr, Mn, Fe, and Co) assembled from ferrocene-like inorganic molecules (P)5TM, offering evidence of the existence of inorganic molecular wires in this class. We present first-principles calculations to investigate systematically the electronic and magnetic properties of such novel inorganic sandwich molecular wires. Compared with the organic molecular wires, all the inorganic [(P)5TM]∞ wires are of large magnetic moment. Among them, we find that [(P)5V]∞, [(P)5Cr]∞ and [(P)5Mn]∞ display ferromagnetic character, while for [(P)5Ti]∞, [(P)5Fe]∞ and [(P)5Co]∞, the magnetic coupling is antiferromagnetic. More remarkably, the TM atoms distributed in these wires show regular docking and lead to structures with ordered spin signals, which is a long-term dream of spintronics. We propose that the difference in magnetic coupling for the studied systems is related to the competition between two exchange interactions of TM atoms. Specifically, we propound that the general mechanism for the formation of stable 1D [(P)5TM]∞ involves the transfer of one electron from the TM atom to the P5 ligand forming [Formula: see text] and TM(+) alternating structure.
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Affiliation(s)
- Yandong Ma
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
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Zhu S, Fu H, Gao G, Wang S, Ni Y, Yao K. A first principles study of novel one-dimensional organic half-metal vanadium-cyclooctatetraene wire. J Chem Phys 2013; 139:024309. [PMID: 23862945 DOI: 10.1063/1.4813406] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The structural, electronic, and magnetic properties of one-dimensional vanadium-cyclooctatetraene[(V-COT)]∞ wire and sandwich clusters are investigated by means of density functional theory. It is found that the (V-COT)∞ SMW is half-metallic. Through the spin transportation calculations, the system for V-COT clusters coupled to gold electrodes performs nearly perfect spin filters. In addition, the I-V curve shows obviously negative differential resistance effects. These results suggest the potential applications of (V-COT)∞ in spintronics.
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Affiliation(s)
- Sicong Zhu
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
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Li DZ, Bai H, Chen Q, Lu H, Zhai HJ, Li SD. Perfectly planar boronyl boroxine D3h B6O6: A boron oxide analog of boroxine and benzene. J Chem Phys 2013; 138:244304. [DOI: 10.1063/1.4811330] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Zhang T, Tian Z, Zhu L, Zhang X, Chen Q, Wang J. Theoretical investigations on structural, electronic, and magnetic properties of TM2Np2 (Np=Naphthalene, TM=Sc–Ni) sandwich clusters. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2013.02.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bagrets A. Spin-Polarized Electron Transport Across Metal–Organic Molecules: A Density Functional Theory Approach. J Chem Theory Comput 2013; 9:2801-15. [DOI: 10.1021/ct4000263] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Alexei Bagrets
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, 76344 Eggenstein-Leopoldshafen, Germany, and Steinbuch
Centre for Computing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen,
Germany
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[(B3O3H3)(n)M]+ (n = 1, 2;M = Cu, Ag, Au): a new class of metal-cation complexes. J Mol Model 2013; 19:3219-24. [PMID: 23636641 DOI: 10.1007/s00894-013-1846-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 04/02/2013] [Indexed: 10/26/2022]
Abstract
A density functional theory (DFT) investigation into the structures and bonding characteristics of [(B3O3H3)nM](+)(n = 1, 2;M = Cu, Ag, Au) complexes was performed. DFT calculations and natural bond orbital (NBO) analyses indicate that the ΙB metal complexes of boroxine exhibit intriguing bonding characteristics, different from the typical cation-π interactions between ΙB metal-cations and benzene. The complexes of [B3O3H3M](+) and [(B3O3H3)2 M](+) (M = Cu, Ag, and Au) favor the conformation of perfectly planar structures with the C2v and D2h symmetry along one of the threefold molecular axes of boroxine, respectively. Detailed natural resonance theory (NRT) and canonical molecular orbitals (CMOs) analyses show that interaction between the metal cation and the boroxine in [B3O3H3M](+) (M = Cu, Ag, and Au) is mainly ionic, while the ΙB metal-cations←π donation effect is responsible for the binding site. In these complexes, boroxine serves as terminals η(1)-B3O3H3 with one O atom of the B3O3 ring. The infra-red (IR) spectra of [B3O3H3M](+) were simulated to facilitate their future experimental characterization. The complexes all give two IR active modes at about 1,300 and 2,700 cm(-1), which are inactive in pure boroxine. Simultaneously, the B-H stretching modes of the complexes are red-shifted due to the interaction between the metal-cation and boroxine. To explore the possibility of the structural pattern developed in this work forming mesoporous materials, complexes [(B3O3H3M)6](6+) (M = Cu, Ag, and Au) were also studied, which appear to be unique and particular interesting: they are all true minima with D6h symmetries and pore sizes ranging from 12.04 Å to 13.65 Å.
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Nakajima A. Study on Electronic Properties of Composite Clusters toward Nanoscale Functional Advanced Materials. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20120298] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Atsushi Nakajima
- Department of Chemistry, Faculty of Science and Technology, Keio University
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Li P, Yang Z, Zhang W, Xiong S. The magnetic properties and spin-filter effects of manganese–borazine sandwich clusters. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.01.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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