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Wang K, Zhang Y, Wang C, Zhao J, Liu L, Chen J, Wang Y. Discovery of a series of silicon-based ferrimagnets in CrMnSi n (n = 4-20) clusters. J Comput Chem 2024; 45:446-453. [PMID: 37942818 DOI: 10.1002/jcc.27250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/23/2023] [Accepted: 10/26/2023] [Indexed: 11/10/2023]
Abstract
Herein, the structural evolution, electronic and magnetic properties of silicon clusters with two different dopants, CrMnSin (n = 4-20) clusters were investigated at density functional theory (DFT) level. Small-sized CrMnSin (n = 4-9) clusters tend to adopt bipyramid-based geometries, while clusters with sizes n = 10 and 11 prefer to opening cage-like structures. For sizes n = 12 to 14, the half-encapsulated structures gradually transform into closed-cage Cr@Sin structures, with the Mn atom exposed outside. Starting from size 15, both the Cr and Mn atoms are completely encapsulated by silicon atoms. Meanwhile, the Cr and Mn atoms in smaller-sized CrMnSin (n = 4-7) clusters tend to be separated, while they prefer to stay together for larger sizes. Cr atom always acts as electron donor, but not for Mn atom. From the average binding energies, one can conclude that it is easier to form larger size clusters. Smaller and larger sized CrMnSin (n = 4-9 and 19-20) clusters prefer to exhibit ferromagnetic Cr-Mn coupling, while sizes n = 10-18 always exhibit ferrimagnetic state. To our knowledge, the CrMnSin clusters is the first kind of neutral transition-metal doped semiconductor clusters that show ferrimagnetic state within a wide size range.
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Affiliation(s)
- Kai Wang
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
| | - Ying Zhang
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
| | - Chaoyong Wang
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
| | - Jun Zhao
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
| | - Le Liu
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
| | - Jiaye Chen
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
| | - Yarui Wang
- Henan Engineering Research Centre of Building-Photovoltaics, School of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan, China
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Zhang LJ, Yang B, Li DZ, Pei L, Farooq U, Xu XL, Zheng WJ, Xu HG. Structural Evolution and Electronic Properties of V 2Si n-/0 ( n = 7-14) Clusters: Anion Photoelectron Spectroscopy and Theoretical Calculations. Inorg Chem 2023; 62:14727-14738. [PMID: 37646377 DOI: 10.1021/acs.inorgchem.3c02174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
A systematic study of the structures and electronic properties of V2-doped silicon clusters, V2Sin-/0 (n = 7-14), was carried out by anion photoelectron spectroscopic experiments combined with theoretical calculations. According to the experimental spectra of V2Sin- (n = 7-14) clusters, the V2Si12- cluster has the highest vertical detachment energy (VDE) of 3.66 eV, while V2Si7- and V2Si14- clusters have lower VDEs of 2.81 and 2.84 eV, respectively. The most stable structure searches find that two V atoms in the V2Sin- clusters with size n = 7 and 8 are located at the surface, while V2Sin- clusters with n ≥ 9 prefer cage-like structures. Based on the analysis of the structural evolution of V2Sin- (n = 9-14) clusters, it can be clearly seen how the antihexagonal prism with one V encapsulated in the cage is gradually built from n = 9 to 12 and further developed from n = 12 to 14 with the extra silicon atoms located at the surface of the Si12 cage. The molecular orbital and the atoms in molecule analysis of the V2Sin- (n = 7-14) anions demonstrate that the strong V-V bond and the delocalized interaction between the V2 moiety and the Sin ligand play a significant role in stabilizing the cluster structures. A strong linear correlation has been found between the Wiberg bond order of the V-V bond and the electron density at the V-V bond critical points.
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Affiliation(s)
- Li-Juan Zhang
- College of Chemical Engineering and Safety Engineering, Binzhou University, Binzhou, Shandong 256600, China
| | - Bin Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Da-Zhi Li
- College of Chemical Engineering and Safety Engineering, Binzhou University, Binzhou, Shandong 256600, China
| | - Ling Pei
- College of Chemical Engineering and Safety Engineering, Binzhou University, Binzhou, Shandong 256600, China
| | - Umar Farooq
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Department of Chemistry, COMSATS University Islamabad, Abbottabad-Campus, Abbottabad, Khyber Pakhtunkhwa 22060, Pakistan
| | - Xi-Ling Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei-Jun Zheng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong-Guang Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Structural evolution, electronic and magnetic properties investigation of V3Si− (n=14–18) clusters based on photoelectron spectroscopy and density functional theory calculations. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Mn2 Dimers Encapsulated in Silicon Cages: A Complex Challenge to MC-SCF Theory. Molecules 2022; 27:molecules27217544. [DOI: 10.3390/molecules27217544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/25/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022] Open
Abstract
MC-SCF wavefunctions for three endohedral Mn/Si clusters, Mn2Si10, Mn2Si12, and [Mn2Si13]+, show evidence for strong static correlation, both in the Mn-Si bonds (’in–out correlation’) and between the two Mn centers (’up–down correlation’). We use both Restricted and Generalized Active Spaces (RAS and GAS) to place constraints on the configurations included in the trial wavefunction, showing that, particularly in the high-symmetry cases, the GAS approach captures more of the static correlation. The important correlating pairs are similar across the series, indicating that the electronic structure of the endohedral Mn2 unit is, to a first approximation, independent of the size of the silicon cage in which it is embedded.
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Khanna V, Singh R, Claes P, Nguyen MT, Fielicke A, Janssens E, Lievens P, McGrady JE. Evolution of Vibrational Spectra in the Manganese-Silicon Clusters Mn 2Si n, n = 10, 12, and 13, and Cationic [Mn 2Si 13] . J Phys Chem A 2022; 126:1617-1626. [PMID: 35238570 PMCID: PMC9084549 DOI: 10.1021/acs.jpca.1c10027] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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A comparison
of DFT-computed and measured infrared spectra reveals
the ground state structures of a series of gas-phase silicon clusters
containing a common Mn2 unit. Mn2Si12 and [Mn2Si13]+ are both axially
symmetric, allowing for a clean separation of the vibrational modes
into parallel (a1) and perpendicular (e1) components.
Information about the Mn–Mn and Mn–Si bonding can be
extracted by tracing the evolution of these modes as the cluster increases
in size. In [Mn2Si13]+, where the
antiprismatic core is capped on both hexagonal faces, a relatively
simple spectrum emerges that reflects a pseudo-D6d geometry. In cases where the cluster is
more polar, either because there is no capping atom in the lower face
(Mn2Si12) or the capping atom is present but
displaced off the principal axis (Mn2Si13),
the spectra include additional features derived from vibrational modes
that are forbidden in the parent antiprism.
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Affiliation(s)
- Vaibhav Khanna
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Roshan Singh
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Pieterjan Claes
- Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Minh Tho Nguyen
- Institute for Computational Science and Technology (ICST), Quang Trung Software City, Ho Chi Minh City 53151, Vietnam
| | - André Fielicke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.,Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623, Berlin, Germany
| | - Ewald Janssens
- Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Peter Lievens
- Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - John E McGrady
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
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