1
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Zhu T, Lu XZ, Aoyama T, Fujita K, Nambu Y, Saito T, Takatsu H, Kawasaki T, Terauchi T, Kurosawa S, Yamaji A, Li HB, Tassel C, Ohgushi K, Rondinelli JM, Kageyama H. Thermal multiferroics in all-inorganic quasi-two-dimensional halide perovskites. NATURE MATERIALS 2024; 23:182-188. [PMID: 38182809 DOI: 10.1038/s41563-023-01759-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 11/13/2023] [Indexed: 01/07/2024]
Abstract
Multiferroic materials, particularly those possessing simultaneous electric and magnetic orders, offer a platform for design technologies and to study modern physics. Despite the substantial progress and evolution of multiferroics, one priority in the field remains to be the discovery of unexplored materials, especially those offering different mechanisms for controlling electric and magnetic orders1. Here we demonstrate the simultaneous thermal control of electric and magnetic polarizations in quasi-two-dimensional halides (K,Rb)3Mn2Cl7, arising from a polar-antipolar transition, as evidenced using both X-ray and neutron powder diffraction data. Our density functional theory calculations indicate a possible polarization-switching path including a strong coupling between the electric and magnetic orders in our halide materials, suggesting a magnetoelectric coupling and a situation not realized in oxide analogues. We expect our findings to stimulate the exploration of non-oxide multiferroics and magnetoelectrics to open access to alternative mechanisms, beyond conventional electric and magnetic control, for coupling ferroic orders.
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Affiliation(s)
- Tong Zhu
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan
| | - Xue-Zeng Lu
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Takuya Aoyama
- Department of Physics, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Koji Fujita
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan
| | - Yusuke Nambu
- Institute for Materials Research, Tohoku University, Sendai, Japan
- Organization for Advanced Studies, Tohoku University, Sendai, Japan
- FOREST, Japan Science and Technology Agency, Kawaguchi, Japan
| | - Takashi Saito
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tokai, Japan
| | - Hiroshi Takatsu
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan
| | - Tatsushi Kawasaki
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan
| | - Takumi Terauchi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan
| | - Shunsuke Kurosawa
- Institute for Materials Research, Tohoku University, Sendai, Japan
- New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japan
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Akihiro Yamaji
- Institute for Materials Research, Tohoku University, Sendai, Japan
- New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japan
| | - Hao-Bo Li
- SANKEN, Osaka University, Ibaraki, Japan
- Spintronics Research Network Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Japan
| | - Cédric Tassel
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan
| | - Kenya Ohgushi
- Department of Physics, Graduate School of Science, Tohoku University, Sendai, Japan
| | - James M Rondinelli
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
| | - Hiroshi Kageyama
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan.
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2
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Saber M, Behara SS, Van der Ven A. Redox Mechanisms, Structural Changes, and Electrochemistry of the Wadsley-Roth Li xTiNb 2O 7 Electrode Material. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:9657-9668. [PMID: 38047183 PMCID: PMC10687872 DOI: 10.1021/acs.chemmater.3c02003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/30/2023] [Accepted: 10/31/2023] [Indexed: 12/05/2023]
Abstract
The TiNb2O7 Wadsley-Roth phase is a promising anode material for Li-ion batteries, enabling fast cycling and high capacities. While already used in commercial batteries, many fundamental electronic and thermodynamic properties of LixTiNb2O7 remain poorly understood. We report on an in-depth first-principles study of the redox mechanisms, structural changes, and electrochemical properties of LixTiNb2O7 as a function of Li concentration. First-principles electronic structure calculations reveal an unconventional redox mechanism upon Li insertion that results in the formation of metal-metal bonds. This metal dimer redox mechanism has important structural consequences as it results in a shortening of cation-pair distances, which in turn affects lattice parameters of the host and thereby alters Li site preferences as the Li concentration is varied. The new insights about redox mechanisms in TiNb2O7 and their effect on the structure and Li site preferences provide guidance on how the electrochemical properties of a promising class of anode materials can be tailored by exploiting the tremendous structural and chemical diversity of Wadsley-Roth phases.
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Affiliation(s)
- Muna Saber
- Department
of Chemical Engineering, University of California,
Santa Barbara, Santa
Barbara, California 93106, United States
| | - Sesha Sai Behara
- Materials
Department, University of California, Santa
Barbara, Santa Barbara, California 93106, United States
| | - Anton Van der Ven
- Materials
Department, University of California, Santa
Barbara, Santa Barbara, California 93106, United States
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3
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Saber M, Reynolds C, Li J, Pollock TM, Van der Ven A. Chemical and Structural Factors Affecting the Stability of Wadsley-Roth Block Phases. Inorg Chem 2023; 62:17317-17332. [PMID: 37816157 DOI: 10.1021/acs.inorgchem.3c02595] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
Wadsley-Roth phases have emerged as highly promising anode materials for Li-ion batteries and are an important class of phases that can form as part of the oxide scales of refractory multiprinciple element alloys. An algorithmic approach is described to systematically enumerate two classes of Wadsley-Roth crystallographic shear structures. An analysis of algorithmically generated Wadsley-Roth phases reveals that a diverse set of oxide crystal structures belongs to the Wadsley-Roth family of phases. First-principles calculations enable the identification of crystallographic and chemical factors that affect Wadsley-Roth phase stability, pointing in particular to the importance of the number and nature of the edges shared by neighboring metal-oxygen octahedra. A systematic study of Wadsley-Roth phases in the Ti-Nb-O ternary system shows that the cations with the highest oxidation states segregate to octahedral sites that minimize the number of shared edges, while cations with the lowest oxidation state accumulate to edge-sharing octahedra at shear boundaries.
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Affiliation(s)
- Muna Saber
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Colleen Reynolds
- Materials Department, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Jonathan Li
- Materials Department, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Tresa M Pollock
- Materials Department, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Anton Van der Ven
- Materials Department, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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4
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Mallick S, Orlandi F, Manuel P, Zhang W, Halasyamani PS, Hayward MA. MnCaTa 2O 7-A Magnetically Ordered Polar Phase Prepared via Cation Exchange. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:7839-7846. [PMID: 37780409 PMCID: PMC10538500 DOI: 10.1021/acs.chemmater.3c01850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/30/2023] [Indexed: 10/03/2023]
Abstract
Reaction between the pseudo-Ruddlesden-Popper phase Li2CaTa2O7 and MnCl2 at 375 °C yields MnCaTa2O7, a paramagnetic polar phase (space group P21nm), which adopts an a-b-c+/b-a-c+ distorted, layered perovskite structure. Magnetization and neutron diffraction data show that MnCaTa2O7 adopts an antiferromagnetically ordered state below TN = 56 K and exhibits large lattice parameter anomalies and a transient increase in its polar distortion mode at TA = 50 K. However, in contrast to the related phase MnSrTa2O7, MnCaTa2O7 shows no strong signature of weak ferromagnetism and thus shows no signs of magnetoelectric coupling. The differences in physical behavior between the two MnATa2O7 phases appear to be related to their differing Mn cation-order and differing TaO6 tilting schemes and demonstrate that even subtle changes to these orderings can have large effects on the distortion-mode couplings, which drive complex behavior of this class of "hybrid improper" ferroelectric material.
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Affiliation(s)
- Subhadip Mallick
- Department
of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK
| | - Fabio Orlandi
- ISIS
Facility, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK
| | - Pascal Manuel
- ISIS
Facility, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK
| | - Weiguo Zhang
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - P. Shiv Halasyamani
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Michael A. Hayward
- Department
of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK
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5
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Lou XY, Zhou Y, Chen WF, Jiang XM, Liu BW, Guo GC. Open honeycomb frameworks of sulphides AHg 4Ga 5S 12 (A = Rb, Cs) exhibiting infrared nonlinear optical properties. Dalton Trans 2023; 52:4873-4879. [PMID: 36942557 DOI: 10.1039/d2dt03683e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2023]
Abstract
A crystal structure with a diamond-like anionic framework belongs to a non-centrosymmetric macrostructure due to the aligned arrangement of tetrahedral units, meeting the premise of second-order nonlinear optical (NLO) materials. Herein, two new Hg-based sulphides, namely RbHg4Ga5S12 (1) and CsHg4Ga5S12 (2), which are isostructural and crystallise in the trigonal space group R3, are successfully isolated in sealed silica tubes by a solid-state reaction. The features of their three-dimensional open honeycomb frameworks are attributed to the parallel alignment of tetrahedral MS4 (M is disordered by 0.444 Hg and 0.555 Ga) building motifs, accompanied by Rb+ (or Cs+) reseating in the cavities. Notably, although the band gap values of 1 and 2 are 2.30 and 2.36 eV, separately, their thermal expansion anisotropies (0.15 and 0.41, respectively) are favourable for achieving laser-induced damage thresholds (5.6 and 5.8 times that of AgGaS2 for 1 and 2, respectively). In addition, the strong polarisability of tetrahedral MS4 building motifs in the diamond-like anionic structures is responsible for the promising second-harmonic generation (SHG) intensities (1.1 and 1.8 times that of AgGaS2 for 1 and 2, respectively) in the particle size range of 50-75 μm with non-phase-matchable behaviour at 1910 nm. Furthermore, theoretical investigation elaborates that electron transitions in compounds 1 and 2 mainly occur from valence band S-3p to conduction band Hg-6s and Ga-4s states, demonstrating that the linear and nonlinear optical properties originate primarily from the synergy of tetrahedral MS4 units.
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Affiliation(s)
- Xiao-Yu Lou
- Fuzhou University, Fuzhou, Fujian 350108, People's Republic of China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
| | - Yu Zhou
- Fuzhou University, Fuzhou, Fujian 350108, People's Republic of China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
| | - Wen-Fa Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
| | - Xiao-Ming Jiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
| | - Bin-Wen Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
| | - Guo-Cong Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
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6
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Ferrari JJ, Ball TJ, Polinski MJ. Effect of Reaction Time on Lanthanide Borate Perrhenate Complexes. Inorg Chem 2023; 62:4696-4704. [PMID: 36893389 DOI: 10.1021/acs.inorgchem.3c00218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Six new trivalent lanthanide borate perrhenate structures─the isostructural series Ln[B8O11(OH)4(H2O)(ReO4)] (Ln = Ce-Nd, Sm, Eu; 1) and La[B6O9(OH)2(H2O)(ReO4)] (2)─have been prepared and structurally characterized. Single-crystal X-ray diffraction analysis reveals that both structures crystallize in the P21/n space group, contain 10-coordinated trivalent lanthanides in a capped triangular cupola geometry, are 3D borate framework materials, and contain either terminal (1) or bridging (2) perrhenate moieties. The presence or lack of a bridging perrhenate, along with the identity of the basal ligands, dictates how the layers are tethered together, ultimately leading to the different structures. Furthermore, the formation of 1 is sensitive to the reaction time employed. Herein, the synthesis, structural descriptions, and spectroscopy of these trivalent lanthanide perrhenate borate complexes are presented.
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Affiliation(s)
- John J Ferrari
- Department of Biochemistry, Chemistry, Engineering, and Physics, Commonwealth University of Pennsylvania, 400 E. 2nd Street, Bloomsburg, Pennsylvania 17815, United States
| | - Tucker J Ball
- Department of Biochemistry, Chemistry, Engineering, and Physics, Commonwealth University of Pennsylvania, 400 E. 2nd Street, Bloomsburg, Pennsylvania 17815, United States
| | - Matthew J Polinski
- Department of Biochemistry, Chemistry, Engineering, and Physics, Commonwealth University of Pennsylvania, 400 E. 2nd Street, Bloomsburg, Pennsylvania 17815, United States
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7
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Katayama T, Choi TK, Khakhulin D, Dohn AO, Milne CJ, Vankó G, Németh Z, Lima FA, Szlachetko J, Sato T, Nozawa S, Adachi SI, Yabashi M, Penfold TJ, Gawelda W, Levi G. Atomic-scale observation of solvent reorganization influencing photoinduced structural dynamics in a copper complex photosensitizer. Chem Sci 2023; 14:2572-2584. [PMID: 36908966 PMCID: PMC9993854 DOI: 10.1039/d2sc06600a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Photochemical reactions in solution are governed by a complex interplay between transient intramolecular electronic and nuclear structural changes and accompanying solvent rearrangements. State-of-the-art time-resolved X-ray solution scattering has emerged in the last decade as a powerful technique to observe solute and solvent motions in real time. However, disentangling solute and solvent dynamics and how they mutually influence each other remains challenging. Here, we simultaneously measure femtosecond X-ray emission and scattering to track both the intramolecular and solvation structural dynamics following photoexcitation of a solvated copper photosensitizer. Quantitative analysis assisted by molecular dynamics simulations reveals a two-step ligand flattening strongly coupled to the solvent reorganization, which conventional optical methods could not discern. First, a ballistic flattening triggers coherent motions of surrounding acetonitrile molecules. In turn, the approach of acetonitrile molecules to the copper atom mediates the decay of intramolecular coherent vibrations and induces a further ligand flattening. These direct structural insights reveal that photoinduced solute and solvent motions can be intimately intertwined, explaining how the key initial steps of light harvesting are affected by the solvent on the atomic time and length scale. Ultimately, this work takes a step forward in understanding the microscopic mechanisms of the bidirectional influence between transient solvent reorganization and photoinduced solute structural dynamics.
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Affiliation(s)
- Tetsuo Katayama
- Japan Synchrotron Radiation Research Institute Kouto 1-1-1, Sayo Hyogo 679-5198 Japan.,RIKEN SPring-8 Center 1-1-1 Kouto, Sayo Hyogo 679-5148 Japan
| | - Tae-Kyu Choi
- XFEL Division, Pohang Accelerator Laboratory Jigok-ro 127-80 Pohang 37673 Republic of Korea
| | | | - Asmus O Dohn
- Science Institute, University of Iceland 107 Reykjavík Iceland .,DTU Physics, Technical University of Denmark Kongens Lyngby Denmark
| | | | - György Vankó
- Wigner Research Centre for Physics, Hungarian Academy of Sciences H-1525 Budapest Hungary
| | - Zoltán Németh
- Wigner Research Centre for Physics, Hungarian Academy of Sciences H-1525 Budapest Hungary
| | | | - Jakub Szlachetko
- SOLARIS National Synchrotron Radiation Centre, Jagiellonian University PL-30392 Kraków Poland
| | - Tokushi Sato
- European XFEL Holzkoppel 4, Schenefeld 22869 Germany
| | - Shunsuke Nozawa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) 1-1 Oho Tsukuba Ibaraki 305-0801 Japan.,Department of Materials Structure Science, School of High Energy Accelerator Science, The Graduate University for Advanced Studies 1-1 Oho Tsukuba Ibaraki 305-0801 Japan
| | - Shin-Ichi Adachi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) 1-1 Oho Tsukuba Ibaraki 305-0801 Japan.,Department of Materials Structure Science, School of High Energy Accelerator Science, The Graduate University for Advanced Studies 1-1 Oho Tsukuba Ibaraki 305-0801 Japan
| | - Makina Yabashi
- RIKEN SPring-8 Center 1-1-1 Kouto, Sayo Hyogo 679-5148 Japan
| | - Thomas J Penfold
- Chemistry-School of Natural and Environmental Sciences, Newcastle University Newcastle Upon-Tyne NE1 7RU UK
| | - Wojciech Gawelda
- Departamento de Química, Universidad Autónoma de Madrid, Campus Cantoblanco 28047 Madrid Spain.,IMDEA-Nanociencia, Campus Cantoblanco C/Faraday 9 28049 Madrid Spain.,Faculty of Physics, Adam Mickiewicz University 61-614 Poznań Poland
| | - Gianluca Levi
- Science Institute, University of Iceland 107 Reykjavík Iceland
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8
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Jia H, Horton M, Wang Y, Zhang S, Persson KA, Meng S, Liu M. Persona of Transition Metal Ions in Solids: A Statistical Learning on Local Structures of Transition Metal Oxides. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202756. [PMID: 35871555 PMCID: PMC9507351 DOI: 10.1002/advs.202202756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/29/2022] [Indexed: 06/15/2023]
Abstract
The local structure of a transition metal (TM) ion is a function of cation elements and valence states. More than that, in this work, by employing a trove of first-principles data of TM oxides, the local structures of TM cations are statistically analyzed to extract detailed information about cation site preference, bond length, site structural distortion, and cation magnetization. It is found that cation radius alone poorly describes the local structure of a transition metal oxide, while the statistics of coordination number as well as the TMO bond length distribution, especially that of the 3d TMs, can provide comprehensive knowledge for understanding the behavior of TM elements. Based on these statistics, the interplay of site distortion due to the Jahn-Teller effect, cation site similarity, and a new set of ionic radii are all obtained to chart the "persona" of transition metal ions in solids.
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Affiliation(s)
- Huaxian Jia
- Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing100190China
- School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Matthew Horton
- Materials Science DivisionLawrence Berkeley National LaboratoryBerkeleyCA94720USA
| | - Yanan Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Shengjie Zhang
- Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing100190China
- School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
| | - Kristin A. Persson
- Molecular FoundryLawrence Berkeley National LaboratoryBerkeleyCA94720USA
- Department of Materials Science and EngineeringUniversity of California BerkeleyBerkeleyCA94720USA
| | - Sheng Meng
- Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Miao Liu
- Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
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9
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Thomas-Colwell J, Sookezian A, Kurtz DA, Kallick J, Henling LM, Stich TA, Hill MG, Hunter BM. Tuning Cobalt(II) Phosphine Complexes to be Axially Ambivalent. Inorg Chem 2022; 61:12625-12634. [PMID: 35920800 PMCID: PMC9387527 DOI: 10.1021/acs.inorgchem.2c01562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
We report the isolation and characterization of a series
of three
cobalt(II) bis(phosphine) complexes with varying numbers of coordinated
solvent ligands in the axial position. X-ray quality crystals of [Co(dppv)2][BF4]2(1), [Co(dppv)2(NCCH3)][BPh4]2(2), and [Co(dppv)2(NCCH3)2][BF4]2(3) (dppv = cis-1,2-bis(diphenylphosphino)ethylene) were grown under slightly different
conditions, and their structures were compared. This analysis revealed
multiple crystallization motifs for divalent cobalt(II) complexes
with the same set of phosphine ligands. Notably, the 4-coordinate
complex 1 is a rare example of a square-planar cobalt(II)
complex, the first crystallographically characterized square-planar
Co(II) complex containing only neutral, bidentate ligands. Characterization
of the different axial geometries via EPR and UV–visible spectroscopies
showed that there is a very shallow energy landscape for axial ligation.
Ligand field angular overlap model calculations support this conclusion,
and we provide a strategy for tuning other ligands to be axially labile
on a phosphine scaffold. This methodology is proposed to be used for
designing cobalt phosphine catalysts for a variety of oxidation and
reduction reactions. A
square-planar cobalt(II) complex featuring two chelating
diphosphine ligands was isolated with 0, 1, and 2 axial acetonitrile
ligands. AOM calculations, validated by EPR, suggest this “axial
ambivalence” results from the near degeneracy of the dx2 − y2/dz2 orbital energies, with a change in the parentage
of the SOMO upon axial ligation. The calculations additionally provide
a simple method of predicting square-planar ligand sets/geometries
tuned to bind axial substrates with varying s-donor strengths.
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Affiliation(s)
- Jack Thomas-Colwell
- Department of Chemistry, Occidental College, Los Angeles, California 90041, United States
| | - Arvin Sookezian
- Department of Chemistry, Occidental College, Los Angeles, California 90041, United States
| | - Daniel A Kurtz
- Rowland Institute at Harvard University, Cambridge, Massachusetts 02142, United States
| | - Jeremy Kallick
- Department of Chemistry, Occidental College, Los Angeles, California 90041, United States
| | - Lawrence M Henling
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Troy A Stich
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, United States
| | - Michael G Hill
- Department of Chemistry, Occidental College, Los Angeles, California 90041, United States
| | - Bryan M Hunter
- Rowland Institute at Harvard University, Cambridge, Massachusetts 02142, United States
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10
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Jiao J, Cheng M, Yang R, Yan Y, Zhang M, Zhang F, Yang Z, Pan S. Promising Deep-Ultraviolet Birefringent Materials via Rational Design and Assembly of Planar π-Conjugated [B(OH) 3 ] and [B 3 O 3 (OH) 3 ] Functional Species. Angew Chem Int Ed Engl 2022; 61:e202205060. [PMID: 35485801 DOI: 10.1002/anie.202205060] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Indexed: 11/10/2022]
Abstract
Birefringent materials play a significant role in modulating polarized light in optical communication and the laser industry. However, the discovery of deep ultraviolet (DUV, λ<200 nm) birefringent materials still faces a serious challenge. Herein, we propose hydroxylated π-conjugated [B(OH)3 ] and [B3 O3 (OH)3 ] units for designing DUV birefringent materials. Innovatively, four new hydroxyborates have been synthesized under mild synthesis conditions. They present four novel pseudo layers that benefit from the large degree of freedom assembly modes of [B(OH)3 ] and [B3 O3 (OH)3 ] genes and large birefringence (0.057-0.123@532 nm). Moreover, the Cs3 [B(OH)3 ]2 Cl3 crystal features a short DUV cutoff edge (180 nm), which further indicates that the reported compounds are potential DUV birefringent crystals. Free and flexible assembly modes of π-conjugated [B(OH)3 ] and [B3 O3 (OH)3 ] groups endow them a particular advantage as significant genes for exploring promising DUV birefringent materials.
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Affiliation(s)
- Jiahao Jiao
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meng Cheng
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Rong Yang
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuchen Yan
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China
| | - Min Zhang
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fangfang Zhang
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhihua Yang
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shilie Pan
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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11
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David G, Ben Amor N, Zeng T, Suaud N, Trinquier G, Malrieu JP. Difficulty of the evaluation of the barrier height of an open-shell transition state between closed shell minima: The case of small C 4n rings. J Chem Phys 2022; 156:224104. [PMID: 35705394 DOI: 10.1063/5.0090129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
C4n cyclacenes exhibit strong bond-alternation in their equilibrium geometry. In the two equivalent geometries, the system keeps an essentially closed-shell character. The two energy minima are separated by a transition state suppressing the bond-alternation, where the wave function is strongly diradical. This paper discusses the physical factors involved in this energy difference and possible evaluations of the barrier height. The barrier given as the energy difference between the restricted density functional theory (DFT)/B3LYP for the equilibrium and the broken symmetry DFT/B3LYP of the transition state is either negative or small, in contradiction with the most reliable Wave Function Theory calculations. The minimal (two electrons in two molecular orbitals) Complete Active Space self-consistent field (CASSCF) overestimates the barrier, and the subsequent second-order perturbation cancels it. Due to the collective character of the spin-polarization effect, it is necessary to perform a full π CASSCF + second-order perturbation to reach a reasonable value of the barrier, but this type of treatment cannot be applied to large molecules. DFT procedures treating on an equal foot the closed-shell and open-shell geometries have been explored, such as Mixed-Reference Spin-Flip Time-dependent-DFT and a new spin-decontamination proposal, namely, DFT-dressed configuration interaction, but the results still depend on the density functional. M06-2X without or with spin-decontamination gives the best agreement with the accurate wave function results.
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Affiliation(s)
- Grégoire David
- University Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Nadia Ben Amor
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626, Université Paul-Sabatier (Toulouse III), 31062 Toulouse Cedex 4, France
| | - Tao Zeng
- Department of Chemistry, York University, Toronto, Ontario M3J1P3, Canada
| | - Nicolas Suaud
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626, Université Paul-Sabatier (Toulouse III), 31062 Toulouse Cedex 4, France
| | - Georges Trinquier
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626, Université Paul-Sabatier (Toulouse III), 31062 Toulouse Cedex 4, France
| | - Jean-Paul Malrieu
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626, Université Paul-Sabatier (Toulouse III), 31062 Toulouse Cedex 4, France
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12
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Liu BW, Pei SM, Jiang XM, Guo GC. Broad transparency and wide band gap achieved in a magnetic infrared nonlinear optical chalcogenide by suppressing d-d transitions. MATERIALS HORIZONS 2022; 9:1513-1517. [PMID: 35322848 DOI: 10.1039/d2mh00060a] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Magnetic infrared (IR) nonlinear optical (NLO) materials, particularly those containing d-block metals, have attracted considerable attention due to the contributions of d-orbitals to large NLO efficiency. However, the d-d transitions from the d-block metals lead to strong optical absorption and narrow band gap, seriously hindering their practical applications. The structural flexibility of salt-inclusion systems provides a good opportunity for modulating the crystal field of magnetic ions to suppress the d-d transitions but allowing the NLO-active d-s and d-p transitions. These ideas afford a new salt-inclusion sulfide [K3Cl][Mn2Ga6S12], which features a rare nanoporous [MnGa3S6]- framework with tunnels of inner diameter of 9.0 Å and possesses a broad transparency (0.39-25.0 μm) and the widest band gap (3.17 eV) among all magnetic IR NLO chalcogenides. Remarkably, it exhibits a strong phase-matchable second-harmonic generation intensity (0.8 × AgGaS2 at 1910 nm and 3.1 × AgGaS2 at 1064 nm) and a high laser-induced damage threshold (12.5 × AgGaS2 at 1064 nm), achieving the important criteria of an advanced IR NLO material.
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Affiliation(s)
- Bin-Wen Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Shao-Min Pei
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
- University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Xiao-Ming Jiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Guo-Cong Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
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13
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Jiao J, Cheng M, Yang R, Yan Y, Zhang M, Zhang F, Yang Z, Pan S. Promising Deep‐Ultraviolet Birefringent Materials via Rational Design and Assembly of Planar π‐Conjugated [B(OH)3] and [B3O3(OH)3] Functional Species. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jiahao Jiao
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Meng Cheng
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Rong Yang
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Yuchen Yan
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Min Zhang
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Fangfang Zhang
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Zhihua Yang
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
| | - Shilie Pan
- Xinjiang Technical Institute of Physics and Chemistry CAS Key Laboratory of Functional Materials and Devices for Special Environments 40-1 South Beijing Road 830011 Urumqi CHINA
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14
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Jiang TK, Yan SN, Hu CL, Li YF, Kong F, Mao JG. K 3ZrF 4(SbF 4)(SbF 5) and K 8(ZrF 6)(Sb 2Zr 2F 20): Two Zirconium Fluoroantimonites with Low Dimensional Structures and Wide Transparency Range. Inorg Chem 2022; 61:4801-4805. [PMID: 35285612 DOI: 10.1021/acs.inorgchem.2c00341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first examples of zirconium fluoroantimonites, namely, K3ZrF4(SbF4)(SbF5) and K8(ZrF6)(Sb2Zr2F20), have been successfully synthesized by facial hydrothermal reactions. K3ZrF4(SbF4)(SbF5) features a unique 1D (ZrSb2F13)3- double-chain structure, while K8(ZrF6)(Sb2Zr2F20) displays a special 0D construction composed of Zr2Sb2F20 tetranuclear clusters and isolated ZrF6 octahedra. The two fluorides can exhibit a broad transparency range with almost no absorption peaks from ultraviolet to near-IR. For K8(ZrF6)(Sb2Zr2F20), a phase transformation was found before decomposition. The band structures, density of states, and linear-optical properties for the title compounds were also obtained.
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Affiliation(s)
- Ting-Kun Jiang
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Sheng-Nan Yan
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Chun-Li Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Ya-Feng Li
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
| | - Fang Kong
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China.,University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Jiang-Gao Mao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
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15
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Zhou J, Li R. Introducing a New d 0 Sc 3+ Asymmetric Ion for Functional Materials: Large Birefringence Enhancement by ScO 6 in Ba 3 Sc 2 (BO 3 ) 4. Chemphyschem 2022; 23:e202200002. [PMID: 35147278 DOI: 10.1002/cphc.202200002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/29/2022] [Indexed: 11/05/2022]
Abstract
Transition metal ions with d0 electronic states (Ti4+ , Zr4+ , Nb5+ and Ta5+ ) are widely investigated as functional materials. This work first illustrates that Sc3+ ion, long-time ignored, displays a second-order Jahn-Teller (SOJT) effect similar to asymmetric oxide-coordinated transition metal ions, thus providing a new ground to seek for asymmetric functional materials with enhanced performances. In Ba3 Sc2 (BO3 )4 , BO3 groups are parallelly arranged, satisfying the ideal arrangement to produce large birefringence. Importantly, distorted octahedral ScO6 with Sc3+ ion in its d0 electronic state enlarges birefringence unexpectedly up to 0.149 @ 550 nm, which is larger than previously reported borates containing solely BO3 , even to B3 O6 units. Subsequently, the SOJT influence of distorted ScO6 octahedra on birefringence is verified by a comparison between experimental data and theoretical calculations. In addition, Ba3 Sc2 (BO3 )4 also displays a high transmittance in the range of 230 nm-3.5 μm with a UV cut-off wavelength at 198 nm and a large laser induced damage threshold (2.7 GW/cm2 ), comparable to α-BaB2 O4 . Above characteristics imply that the title compound may be a promising birefringent material.
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Affiliation(s)
- Jingfang Zhou
- Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Rukang Li
- Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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16
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Mallick S, Zhang W, Batuk M, Gibbs AS, Hadermann J, Halasyamani PS, Hayward MA. The crystal and defect structures of polar KBiNb 2O 7. Dalton Trans 2022; 51:1866-1873. [PMID: 35018920 DOI: 10.1039/d1dt04064b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
KBiNb2O7 was prepared from RbBiNb2O7 by a sequence of cation exchange reactions which first convert RbBiNb2O7 to LiBiNb2O7, before KBiNb2O7 is formed by a further K-for-Li cation exchange. A combination of neutron, synchrotron X-ray and electron diffraction data reveal that KBiNb2O7 adopts a polar, layered, perovskite structure (space group A11m) in which the BiNb2O7 layers are stacked in a (0, ½, z) arrangement, with the K+ cations located in half of the available 10-coordinate interlayer cation sites. The inversion symmetry of the phase is broken by a large displacement of the Bi3+ cations parallel to the y-axis. HAADF-STEM images reveal that KBiNb2O7 exhibits frequent stacking faults which convert the (0, ½, z) layer stacking to (½, 0, z) stacking and vice versa, essentially switching the x- and y-axes of the material. By fitting the complex diffraction peak shape of the SXRD data collected from KBiNb2O7 it is estimated that each layer has approximately a 9% chance of being defective - a high level which is attributed to the lack of cooperative NbO6 tilting in the material, which limits the lattice strain associated with each fault.
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Affiliation(s)
- Subhadip Mallick
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - Weiguo Zhang
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, USA
| | - Maria Batuk
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Alexandra S Gibbs
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK
| | - Joke Hadermann
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - P Shiv Halasyamani
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, USA
| | - Michael A Hayward
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
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17
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Synthesis and characterization of new families of lanthanide perrhenate complexes. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2021.122780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Yan SN, Wang XX, Hu CL, Li BX, Kong F, Mao JG. Na3Ti3O3(SeO3)4F: A Phase-Matchable Nonlinear-Optical Crystal with Enlarged Second-Harmonic-Generation Intensity and Band Gap. Inorg Chem 2022; 61:2686-2694. [DOI: 10.1021/acs.inorgchem.1c03738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sheng-Nan Yan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
| | - Xiao-Xue Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Chun-Li Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Bing-Xuan Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Fang Kong
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Jiang-Gao Mao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
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19
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Sigmund LM, Maier R, Greb L. The inversion of tetrahedral p-block element compounds: general trends and the relation to the second-order Jahn-Teller effect. Chem Sci 2022; 13:510-521. [PMID: 35126983 PMCID: PMC8729809 DOI: 10.1039/d1sc05395g] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/14/2021] [Indexed: 12/31/2022] Open
Abstract
The tetrahedron is the primary structural motif among the p-block elements and determines the architecture of our bio- and geosphere. However, a broad understanding of the configurational inversion of tetrahedral compounds is missing. Here, we report over 250 energies (DLPNO-CCSD(T)) for square planar inversion of third- and fourth-period element species of groups 13, 14, and 15. Surprisingly low inversion barriers are identified for compounds of industrial relevance (e.g., ≈100 kJ mol-1 for Al(OH)4 -). More fundamentally, the second-order Jahn-Teller theorem is disclosed as suitable to rationalize substituent and central element effects. Bond analysis tools give further insights into the preference of eight valence electron systems with four substituents to be tetrahedral. Hence, this study develops a model to understand, memorize, and predict the angular flexibility of tetrahedral species. Perceiving the tetrahedron not as forcingly rigid but as a dynamic structural entity might leverage new approaches and visions for adaptive matter.
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Affiliation(s)
- Lukas M Sigmund
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Rouven Maier
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Department of Chemistry and Biochemistry - Inorganic Chemistry, Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
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20
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Wang ZL, Chen TT, Chen WJ, Li WL, Zhao J, Jiang XL, Li J, Wang LS, Hu HS. The smallest 4f-metalla-aromatic molecule of cyclo-PrB 2− with Pr–B multiple bonds. Chem Sci 2022; 13:10082-10094. [PMID: 36128247 PMCID: PMC9430590 DOI: 10.1039/d2sc02852b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 07/18/2022] [Indexed: 11/25/2022] Open
Abstract
The concept of metalla-aromaticity proposed by Thorn–Hoffmann (Nouv. J. Chim. 1979, 3, 39) has been expanded to organometallic molecules of transition metals that have more than one independent electron-delocalized system. Lanthanides, with highly contracted 4f atomic orbitals, are rarely found in multiply aromatic systems. Here we report the discovery of a doubly aromatic triatomic lanthanide-boron molecule PrB2− based on a joint photoelectron spectroscopy and quantum chemical investigation. Global minimum structural searches reveal that PrB2− has a C2v triangular structure with a paramagnetic triplet 3B2 electronic ground state, which can be viewed as featuring a trivalent Pr(III,f2) and B24−. Chemical bonding analyses show that this cyclo-PrB2− species is the smallest 4f-metalla-aromatic system exhibiting σ and π double aromaticity and multiple Pr–B bonding characters. It also sheds light on the formation of the rare B24− tetraanion by the high-lying 5d orbitals of the 4f-elements, completing the isoelectronic B24−, C22−, N2, and O22+ series. We report the smallest 4f-metalla-aromatic molecule of PrB2− exhibiting σ and π double aromaticity and multiple Pr–B bond characters.![]()
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Affiliation(s)
- Zhen-Ling Wang
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Teng-Teng Chen
- Department of Chemistry, Brown University, Providence 02912, Rhode Island, USA
| | - Wei-Jia Chen
- Department of Chemistry, Brown University, Providence 02912, Rhode Island, USA
| | - Wan-Lu Li
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Jing Zhao
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Xue-Lian Jiang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jun Li
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence 02912, Rhode Island, USA
| | - Han-Shi Hu
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, 100084, China
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21
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Stereochemical expression of ns2 electron pairs in metal halide perovskites. Nat Rev Chem 2021; 5:838-852. [PMID: 37117392 DOI: 10.1038/s41570-021-00335-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2021] [Indexed: 12/20/2022]
Abstract
Metal halide perovskites (MHPs) are characterized as strongly anharmonic and dynamic lattices. While there is a consensus on the solvation-like polarization effect in these materials, whether static polarization, that is, ferroelectricity, exists or not in 3D MHPs remains controversial. In this Review, we resolve this controversy by analysing the stereochemical expression (SE) of the ns2 electron pair (NSEP) on group IV metal cations. The SE-NSEP is key to lattice instability, which governs the breaking of inversion symmetry and induces ferroelectricity. The SE-NSEP is diminishingly small in commonly studied 3D lead iodide or bromide perovskites, indicating an absence of ferroelectricity. In contrast, 2D MHPs promote the SE-NSEP and produce unambiguous ferroelectricity or antiferroelectricity. Irrespective of ferroelectricity, the dynamic manifestation of the SE-NSEP provides the missing link to understanding polar fluctuations and efficient dielectric screening in MHPs, thus, contributing to the long carrier lifetimes and diffusion lengths.
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22
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Mallick S, Khalsa G, Kaaret JZ, Zhang W, Batuk M, Gibbs AS, Hadermann J, Halasyamani PS, Benedek NA, Hayward MA. The influence of the 6s 2 configuration of Bi 3+ on the structures of A'BiNb 2O 7 (A' = Rb, Na, Li) layered perovskite oxides. Dalton Trans 2021; 50:15359-15369. [PMID: 34642733 DOI: 10.1039/d1dt02974f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solid state compounds which exhibit non-centrosymmetric crystal structures are of great interest due to the physical properties they can exhibit. The 'hybrid improper' mechanism - in which two non-polar distortion modes couple to, and stabilize, a further polar distortion mode, yielding an acentric crystal structure - offers opportunities to prepare a range of novel non-centrosymmetric solids, but examples of compounds exhibiting acentric crystal structures stabilized by this mechanism are still relatively rare. Here we describe a series of bismuth-containing layered perovskite oxide phases, RbBiNb2O7, LiBiNb2O7 and NaBiNb2O7, which have structural frameworks compatible with hybrid-improper ferroelectricity, but also contain Bi3+ cations which are often observed to stabilize acentric crystal structures due to their 6s2 electronic configurations. Neutron powder diffraction analysis reveals that RbBiNb2O7 and LiBiNb2O7 adopt polar crystal structures (space groups I2cm and B2cm respectively), compatible with stabilization by a trilinear coupling of non-polar and polar modes. The Bi3+ cations present are observed to enhance the magnitude of the polar distortions of these phases, but are not the primary driver for the acentric structure, as evidenced by the observation that replacing the Bi3+ cations with Nd3+ cations does not change the structural symmetry of the compounds. In contrast the non-centrosymmetric, but non-polar structure of NaBiNb2O7 (space group P212121) differs significantly from the centrosymmetric structure of NaNdNb2O7, which is attributed to a second-order Jahn-Teller distortion associated with the presence of the Bi3+ cations.
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Affiliation(s)
- Subhadip Mallick
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
| | - Guru Khalsa
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Jeffrey Z Kaaret
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, USA
| | - Weiguo Zhang
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, USA
| | - Maria Batuk
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Alexandra S Gibbs
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK
| | - Joke Hadermann
- EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - P Shiv Halasyamani
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, USA
| | - Nicole A Benedek
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Michael A Hayward
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
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23
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Kee J, Ok KM. Hydrogen-Bond-Driven Synergistically Enhanced Hyperpolarizability: Chiral Coordination Polymers with Nonpolar Structures Exhibiting Unusually Strong Second-Harmonic Generation. Angew Chem Int Ed Engl 2021; 60:20656-20660. [PMID: 34097326 DOI: 10.1002/anie.202106812] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Indexed: 11/06/2022]
Abstract
Four chiral coordination polymers (CPs), M[(S,S)-C14 H14 N2 O6 ] and M[(R,R)-C14 H14 N2 O6 ] (M=Zn or Cd), have been exclusively synthesized in high yields with the aid of newly designed chiral ligand under hydrothermal condition. The CPs crystallizing in the orthorhombic nonpolar space group, C2221 , reveal three-dimensional framework structures composed of MO4 tetrahedra and the corresponding homochiral linkers. Powder second-harmonic generation (SHG) measurements indicate that the nonpolar CPs reveal very strong SHG efficiency of ca. 5-9 times that of KH2 PO4 and exhibit type-I phase-matching behavior. Density functional theory calculations suggest that the unusually large SHG efficiency found from the nonpolar CPs should be attributable to the synergistic effect of polarizable metal cations and enhanced hyperpolarizability in the donor-acceptor system originating from the hydrogen bonding in the coordinated linkers.
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Affiliation(s)
- Joonhyuk Kee
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107, Korea
| | - Kang Min Ok
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107, Korea
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24
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Cui ZH, Liu YQ, Wang MH. Linear Group 13 E≡E Triple Bonds in E 2 Li 6 2. Chemphyschem 2021; 22:1996-2003. [PMID: 34396650 DOI: 10.1002/cphc.202100366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/27/2021] [Indexed: 11/07/2022]
Abstract
The triply bonded heavier main-group compounds have a textbook trans-bent geometry, in contrast to a familiar linear form found for the lightest analogues. Strikingly, the unexpected linear group 13 E≡E triple bonds were herein found in the D4h -symmetry E2 Li6 2+ clusters, and they possess a large barrier (>18.0 kcal/mol) towards the dissociation of Li+ . The perfectly surrounded Li4 motifs and two linear coordinated Li atoms strongly suppress the increasing nonbonded electron density of heavier E atoms, making two degenerate π bonds and one multi-center σ bond in linear heavier main-group triple bonds. The surrounding Li6 motifs not only creates an effective electronic structure to form a linear E≡E triple bond, but the resulting electrostatic interactions account for the highly stable global E2 Li6 2+ clusters.
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Affiliation(s)
- Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun, China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, China
| | - Yu-Qian Liu
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun, China
| | - Meng-Hui Wang
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun, China
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25
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Zhu T, Orlandi F, Manuel P, Gibbs AS, Zhang W, Halasyamani PS, Hayward MA. Directed synthesis of a hybrid improper magnetoelectric multiferroic material. Nat Commun 2021; 12:4945. [PMID: 34400623 PMCID: PMC8368162 DOI: 10.1038/s41467-021-25098-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 07/22/2021] [Indexed: 11/09/2022] Open
Abstract
Preparing materials which simultaneously exhibit spontaneous magnetic and electrical polarisations is challenging as the electronic features which are typically used to stabilise each of these two polarisations in materials are contradictory. Here we show that by performing low-temperature cation-exchange reactions on a hybrid improper ferroelectric material, Li2SrTa2O7, which adopts a polar structure due to a cooperative tilting of its constituent TaO6 octahedra rather than an electronically driven atom displacement, a paramagnetic polar phase, MnSrTa2O7, can be prepared. On cooling below 43 K the Mn2+ centres in MnSrTa2O7 adopt a canted antiferromagnetic state, with a small spontaneous magnetic moment. On further cooling to 38 K there is a further transition in which the size of the ferromagnetic moment increases coincident with a decrease in magnitude of the polar distortion, consistent with a coupling between the two polarisations.
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Affiliation(s)
- Tong Zhu
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, Oxford, UK
| | - Fabio Orlandi
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, UK
| | - Pascal Manuel
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, UK
| | | | - Weiguo Zhang
- Department of Chemistry, University of Houston, Houston, TX, USA
| | | | - Michael A Hayward
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, Oxford, UK.
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26
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Turnbull D, Wetmore SD, Gerken M. Stabilisation of [W V F 4 ] + by N- and P-Donor Ligands: Second-Order Jahn-Teller Effects in Octacoordinate d 1 Complexes. Chemistry 2021; 27:11335-11343. [PMID: 33882177 DOI: 10.1002/chem.202100863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 12/24/2022]
Abstract
The first isolated examples of cationic fluoridotungsten(V) complexes are reported as octacoordinate [WF4 (L)4 ]+ (L=C5 H5 N, P(CH3 )3 ). The [WF4 (NC5 H5 )4 ]+ cation is synthesised as its [O3 SCF3 ]- salt upon reaction of WF5 (NC5 H5 )2 with [(CH3 )3 Si(NC5 H5 )][O3 SCF3 ] in excess C5 H5 N, whereas [WF4 {P(CH3 )3 }4 ]+ is accessed directly from WF6 upon reaction with (CH3 )3 SiO3 SCF3 and excess P(CH3 )3 . These salts were characterised by X-ray crystallography and Raman spectroscopy in the solid state. New geometry indices for octacoordinate complexes (τ8 and τ8 ') are introduced, allowing for the facile differentiation of trigonal-dodecahedral (TD) and square-antiprismatic (SA) geometries. This has disambiguated the SA geometries of [WF4 (L)4 ]+ and the geometries of a series of previously reported d0 and d1 MA4 B4 complexes. Computational (DFT-B3LYP) studies of [WF4 (PH3 )4 ]2+/+ and related model systems demonstrate the occurrence of a second-order Jahn-Teller (SOJT) distortion from TD in d0 complexes to SA in d1 complexes, with the degree of SOJT stabilisation being most significant in 5d complexes containing fluorido ligands and monodentate neutral donors.
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Affiliation(s)
- Douglas Turnbull
- Canadian Centre for Research in Advanced Fluorine Technologies and Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, AB, Canada
| | - Stacey D Wetmore
- Canadian Centre for Research in Advanced Fluorine Technologies and Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, AB, Canada
| | - Michael Gerken
- Canadian Centre for Research in Advanced Fluorine Technologies and Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, AB, Canada
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27
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Kee J, Ok KM. Hydrogen‐Bond‐Driven Synergistically Enhanced Hyperpolarizability: Chiral Coordination Polymers with Nonpolar Structures Exhibiting Unusually Strong Second‐Harmonic Generation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106812] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Joonhyuk Kee
- Department of Chemistry Sogang University 35 Baekbeom-ro, Mapo-gu Seoul 04107 Korea
| | - Kang Min Ok
- Department of Chemistry Sogang University 35 Baekbeom-ro, Mapo-gu Seoul 04107 Korea
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28
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Lee DW, Noh HR, Kim TH, Lee J, Kim JY, Ko KT, Lim SH. Mixed-valent titanium tellurium oxides, Ti1-Te Te3O8+ (x = 0, 0.1, and 0.12): Hydrothermal synthesis, structure, and characterization. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Bandeira NAG, Liu H, Calhorda MJ. A lacunary tungstomolybdophosphate as an electronic pendulum: The "blue" electron under examination. J Chem Phys 2021; 154:124301. [PMID: 33810680 DOI: 10.1063/5.0039092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photoreduction of a Keggin type lacunary tungstomolybdophosphate, α-(Bu4N)4[H3PW9Mo2O39], in acetonitrile, led to the formation of a monoreduced lacunary heteropoly anion, or a one electron reduced "heteropoly blue" species, whereby the added "blue" electron was captured by the molybdenum atoms. The magnetic properties and behavior of the "blue" electron were studied by a modified Evans nuclear magnetic resonance method (small downshift of the 31P signal) and variable-temperature electron paramagnetic resonance (g = 1.936 for MoV). The intermolecular exchange of the "blue" electron was limited by a geometrical factor, which requires the contact between Mo caps to exchange it between the heteropoly couple. The intramolecular exchange of the "blue" electron between Mo atoms was rather fast (5.3 × 109 s-1), with a rate of more than six orders of magnitude larger than the intermolecular exchange rate. Density functional theory was used to determine the most prevalent protonation sites in the mixed lacunary isomers with the aim of studying the intramolecular electron transfer pathway in the isolated [H4PW9Mo2O39]4- species. The singly occupied molecular orbital (SOMO) is essentially localized in one of the two nonequivalent molybdenum sites. The kinetics of the intramolecular electron exchange equilibrium MoV + MoVI → MoVI + MoV between the two molybdenum atoms bridged by an oxygen atom was found to be fast in agreement with the experimental result. The transition state is of mixed-valence type, with the SOMO delocalized over the Mo-O-Mo group. Spectroscopic parameters were found to be in fair agreement with experimental results.
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Affiliation(s)
- Nuno A G Bandeira
- BioISI - Biosystems and Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - Huizhang Liu
- BioISI - Biosystems and Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - Maria José Calhorda
- BioISI - Biosystems and Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
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30
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Widita R, Muhammady S, Prasetiyawati RD, Marlina R, Suryanegara L, Purnama B, Kurniadi R, Darma Y. Revisiting the Structural, Electronic, and Magnetic Properties of (LaO)MnAs: Effect of Hubbard Correction and Origin of Mott-Insulating Behavior. ACS OMEGA 2021; 6:4440-4447. [PMID: 33644556 PMCID: PMC7906576 DOI: 10.1021/acsomega.0c05889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/28/2021] [Indexed: 05/28/2023]
Abstract
We study the structural, electronic, and magnetic properties of the antiferromagnetic-layered oxyarsenide (LaO)MnAs system from the first-principle calculation. The increasing Hubbard energy (U) in the Mn 3d orbital induces the increasing local-symmetry distortions (LSDs) in MnAs4 and OLa4 tetrahedra. The LSD in MnAs4 tetrahedra is possibly promoted by the second-order Jahn-Teller effect in the Mn 3d orbital. Furthermore, the increasing U also escalates the bandgap (E g) and the magnetic moment of Mn (μMn). The value of U = 1 eV is the most appropriate by considering the structural properties. This value leads to E g and μMn of 0.834 eV and 4.31 μB, respectively. The calculated μMn is lower than the theoretical value for the high-spin state of Mn 3d (5 μB) due to the hybridization between Mn 3d and As 4p states. However, d xy states are localized and show the weakest hybridization with valence As 4p states. The Mott-insulating behavior in the system is characterized by the E g transition between the valence and conduction d zx /d zy states. This work shows new physical insights for advanced functional device applications, such as spintronics.
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Affiliation(s)
- Rena Widita
- Department
of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Shibghatullah Muhammady
- Department
of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Rahma Dhani Prasetiyawati
- Department
of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Resti Marlina
- Research
Center for Biomaterials, Indonesian Institute
of Sciences, Jl. Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
| | - Lisman Suryanegara
- Research
Center for Biomaterials, Indonesian Institute
of Sciences, Jl. Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
| | - Budi Purnama
- Department
of Physics, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Ir. Sutami 36, Surakarta 57126, Indonesia
| | - Rizal Kurniadi
- Department
of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Yudi Darma
- Department
of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
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31
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Choi H, Ok KM. Systematic centricity control using a chiral template: novel noncentrosymmetric polar niobium oxyfluorides and tantalum fluorides directed by chiral histidinium cations, [( l-hisH 2)NbOF 5], [( d-hisH 2)NbOF 5], [( l-hisH 2)TaF 7], and [( d-hisH 2)TaF 7]. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00634g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel noncentrosymmetric polar niobium and tantalum (oxy)fluorides have been systematically synthesized by using a chiral histidinium template.
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Affiliation(s)
- HeeJung Choi
- Department of Chemistry
- Sogang University
- Seoul 04107
- Republic of Korea
| | - Kang Min Ok
- Department of Chemistry
- Sogang University
- Seoul 04107
- Republic of Korea
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32
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Liu YQ, Wang MH, Huang R, Zhao L, Cui ZH. EE triple bonds (E = Group 13) promoted by charge transfer from alkali metals. NEW J CHEM 2021. [DOI: 10.1039/d1nj03611d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical bonding analysis shows that strong charge transfer arises from M4 (M = Li and Na) motifs to E2 (E = Group 13), further making an EE triple bond composed of two π bonds and one delocalized σ bond.
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Affiliation(s)
- Yu-qian Liu
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun, China
| | - Meng-hui Wang
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun, China
| | - Runfeng Huang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Lili Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Zhong-hua Cui
- Institute of Atomic and Molecular Physics, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University, Changchun, China
- Beijing National Laboratory for Molecular Sciences, China
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33
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Müller L, Nadurata VL, Cula B, Hoof S, Herwig C, Limberg C. Versatile Coordination Behavior of the Asymmetric Bis(3‐mesityl‐pyrazol‐1‐yl)(5‐mesitylpyrazol‐1‐yl) Hydroborate Ligand towards Late 3 d M
2+
Ions. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lars Müller
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Vincent L. Nadurata
- School of Chemistry University of Melbourne Parkville Victoria 3010 Australia
| | - Beatrice Cula
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Santina Hoof
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Herwig
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Limberg
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
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34
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Abbenseth J, Goicoechea JM. Recent developments in the chemistry of non-trigonal pnictogen pincer compounds: from bonding to catalysis. Chem Sci 2020; 11:9728-9740. [PMID: 34094237 PMCID: PMC8162179 DOI: 10.1039/d0sc03819a] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 08/18/2020] [Indexed: 01/01/2023] Open
Abstract
The combination of well-established meridionally coordinating, tridentate pincer ligands with group 15 elements affords geometrically constrained non-trigonal pnictogen pincer compounds. These species show remarkable activity in challenging element-hydrogen bond scission reactions, such as the activation of ammonia. The electronic structures of these compounds and the implications they have on their electrochemical properties and transition metal coordination are described. Furthermore, stoichiometric and catalytic bond forming reactions involving B-H, N-H and O-H bonds as well as carbon nucleophiles are presented.
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Affiliation(s)
- Josh Abbenseth
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Jose M Goicoechea
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
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35
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Popp J, Hanf S, Hey‐Hawkins E. Unusual Racemization of Tertiary P-Chiral Ferrocenyl Phosphines. Chemistry 2020; 26:5765-5769. [PMID: 32048370 PMCID: PMC7317868 DOI: 10.1002/chem.202000218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Indexed: 11/11/2022]
Abstract
Tertiary phosphines are generally known to withstand inversion under moderate conditions. In this work, a remarkable racemization process of three P-chiral ferrocenyl phosphines is reported. Subjected to conventional column chromatography as highly enantioenriched compounds, they greatly experienced racemization when collected at the column outlet within minutes. Initially, attention was drawn to this unusual inversion behavior after observing that the superb enantiomeric excess of these ligands (>95 % ee in all cases) was almost lost in their corresponding ruthenium(II) complexes. Successively excluding possible racemization causes, these P-chiral ferrocenyl phosphines were found to undergo a significant, acid-catalyzed racemization process at room temperature within a few minutes. This process is mainly observed during standard column chromatography by using conventional silica or alumina, but can also be triggered deliberately by addition of certain acids. Therefore, the stereochemical preservation of P-chiral phosphines during their purification may per se not always be guaranteed, since column chromatography is the most frequently used technique for purifying such types of compounds.
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Affiliation(s)
- John Popp
- Faculty of Chemistry and MineralogyInstitute of Inorganic ChemistryLeipzig UniversityJohannisallee 2904103LeipzigGermany
| | - Schirin Hanf
- Faculty of Chemistry and MineralogyInstitute of Inorganic ChemistryLeipzig UniversityJohannisallee 2904103LeipzigGermany
- Department of ChemistryCambridge UniversityLensfield RoadCambridgeCB2 1EWUK
| | - Evamarie Hey‐Hawkins
- Faculty of Chemistry and MineralogyInstitute of Inorganic ChemistryLeipzig UniversityJohannisallee 2904103LeipzigGermany
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36
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Wang Q, Zhou W, Dong W, Wen H, Wang B, Yao Q, Li J, Wang J. Rb 21.89W 32.66O 108: An Excellent Mid- and Far-IR Nonlinear-Optical Material with a Wide Band Gap. Inorg Chem 2020; 59:4601-4607. [PMID: 32159947 DOI: 10.1021/acs.inorgchem.9b03711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
IR nonlinear-optical (NLO) crystal is the important device in IR laser technology. Nevertheless, the application of most IR NLO crystals in high-power lasers is always limited by the low laser damage threshold (LDT), which is mainly caused by the narrow optical band gap (Eg). Here, the physical properties of the Rb21.89W32.66O108 (RWO) crystal with a longer absorption cutoff edge and a wide Eg were systematically studied for the first time. A preliminary measurement of the LDT was performed, and the result shows that RWO has a high powder LDT of about 42 times that of AgGaS2. In order to better understand the relationship between the structure and properties, the dipole moments of WO6 octahedra were accurately calculated and analyzed. Meanwhile, it was indicated that RWO exhibits an ideal frequency doubling strength with the type I phase matching. Finally, it was revealed that RWO has great application value as an IR NLO crystal.
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Affiliation(s)
- Qingbo Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Wenju Zhou
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Weimin Dong
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Hang Wen
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Biao Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Qian Yao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Jing Li
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Jiyang Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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37
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Nisbet ML, Pendleton IM, Nolis GM, Griffith KJ, Schrier J, Cabana J, Norquist AJ, Poeppelmeier KR. Machine-Learning-Assisted Synthesis of Polar Racemates. J Am Chem Soc 2020; 142:7555-7566. [DOI: 10.1021/jacs.0c01239] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew L. Nisbet
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Ian M. Pendleton
- Department of Chemistry, Haverford College, 370 Lancaster Avenue, Haverford, Pennsylvania 19041, United States
| | - Gene M. Nolis
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, Illinois 60607, United States
| | - Kent J. Griffith
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Joshua Schrier
- Department of Chemistry, Fordham University, 441 E. Fordham Road, The Bronx, New York, New York 10458, United States
| | - Jordi Cabana
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, Illinois 60607, United States
| | - Alexander J. Norquist
- Department of Chemistry, Haverford College, 370 Lancaster Avenue, Haverford, Pennsylvania 19041, United States
| | - Kenneth R. Poeppelmeier
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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38
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Abstract
After the experimental evidence of polyynic as the stable form of cyclo[18]carbon, in the present paper, using ab initio electronic structure calculations, we show that this result is a symmetry breaking event, a consequence of the second-order Jahn-Teller effect. We show that the eigenfunctions associated with lowest unoccupied molecular orbitals (LUMO) and LUMO + 1, the excited states of this ring molecule, interact with the eigenfunctions associated with the ground state (occupied states), and this interaction stabilizes the less symmetric polyynic form of cyclo[18]carbon with D9h symmetry, instead of the cumulenic form. The frontier state interactions are responsible for the distortions in the symmetry in the electronic structures, lowering the energy and making the polyynic form the stable one with alternating triple and single bonds.
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Affiliation(s)
- Zenner S Pereira
- Departamento de Ciência e Tecnologia , Universidade Federal Rural do Semi-Árido (UFERSA) , Campus Caraúbas , 59780000 Caraúbas , Rio Grande do Norte , Brazil
| | - Edison Z da Silva
- Institute of Physics "Gleb Wataghin", UNICAMP, CP 6165 , 13083-9859 Campinas , São Paulo , Brazil
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39
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Wedler HB, Wendelboe P, Tantillo DJ, Power PP. Second order Jahn-Teller interactions at unusually high molecular orbital energy separations. Dalton Trans 2020; 49:5175-5182. [PMID: 32236283 DOI: 10.1039/d0dt00137f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Second order Jahn-Teller (SOJT) effects arise from interactions between filled and empty molecular orbitals of like symmetry. These interactions often lead to structural distortions whose extent is inversely proportional to the energy difference between the interacting orbitals. The main objectives of the work described here are (1) the calculation (using density functional theory methods) of the energies of the valence molecular orbitals in the species EH3 (E = N, P, As or Sb), HEEH (E = C, Si, Ge or Sn), and H2EEH2, (E = C, Si, Ge or Sn) and (2) the correlation of these energies with barriers for planarization or linearization. The calculations suggest an upper limit of about 12 eV energy separation of the interacting levels for SOJT effects to be significant, which is considerably larger than previously thought and implies that SOJT effects may be more common than currently realized.
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Affiliation(s)
- Henry B Wedler
- Department of Chemistry, University of California-Davis, Davis, CA, USA.
| | - Paul Wendelboe
- Department of Chemistry, University of California-Davis, Davis, CA, USA.
| | - Dean J Tantillo
- Department of Chemistry, University of California-Davis, Davis, CA, USA.
| | - Philip P Power
- Department of Chemistry, University of California-Davis, Davis, CA, USA.
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40
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Muhammady S, Widita R, Darma Y. Influence of Ch substitution on structural, electronic, and thermoelectric properties of layered oxychalcogenides (La 0.5Bi 0.5O)CuCh (Ch = S, Se, Te): a new insight from first principles. RSC Adv 2020; 10:27481-27491. [PMID: 35516961 PMCID: PMC9055621 DOI: 10.1039/d0ra05187j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 07/17/2020] [Indexed: 11/21/2022] Open
Abstract
Substituting Ch from S to Se to Te enhances local-symmetry distortion and thermoelectricity of (La0.5Bi0.5O)CuCh from first principles.
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Affiliation(s)
- Shibghatullah Muhammady
- Department of Physics
- Faculty of Mathematics and Natural Sciences
- Institut Teknologi Bandung
- Bandung
- Indonesia
| | - Rena Widita
- Department of Physics
- Faculty of Mathematics and Natural Sciences
- Institut Teknologi Bandung
- Bandung
- Indonesia
| | - Yudi Darma
- Department of Physics
- Faculty of Mathematics and Natural Sciences
- Institut Teknologi Bandung
- Bandung
- Indonesia
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41
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Lee H, Ok KM. Na
2
Mg
1−
x
Zn
x
SiO
4
(0 ≤
x
≤ 1): Noncentrosymmetric Sodium Metal Silicate Solid Solutions with Ultraviolet Nonlinear Optical Properties. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11935] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hyeshin Lee
- Department of ChemistryChung‐Ang University Seoul 06974 Republic of Korea
| | - Kang Min Ok
- Department of ChemistrySogang University Seoul 04107 Republic of Korea
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42
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Poupon M, Barrier N, Pautrat A, Perez O. Evidence of magnetoelectric effect in Co4(H2O)3(SeO3)4. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.120962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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43
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Rahmani N, Ghazi ME, Izadifard M, Wang D, Shabani A, Sanyal B. Density functional study of structural, electronic and magnetic properties of new half-metallic ferromagnetic double perovskite Sr 2MnVO 6. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:475501. [PMID: 31349237 DOI: 10.1088/1361-648x/ab35f7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this paper, a new half-metallic (HM) double perovskite compound is predicted with the simultaneous presence of ferromagnetism and polar distortion. The structural, electronic and magnetic properties of Sr2MnVO6 (SMVO) are calculated by density functional theory (DFT) with both generalized gradient approximation (GGA) and GGA + U approaches, where U is the on-site Coulomb interaction parameter. Different orderings of B (B') cationic sites in A2BB'O6 double perovskite structure are evaluated, including rocksalt, columnar and layered arrangements for cubic, monoclinic and tetragonal crystal structures. It is found that the most stable ordering is obtained when B and B' are placed in a layered type ordering for a tetragonal crystal structure with I4/m space group, which is confirmed by phonon calculations. The B-site ordering of the Mn3+ and V5+ ions in a layered configuration leads to ferromagnetically coupled magnetic moments of 4.17 µ B at Mn site and 0.23 µ B at V site. Finally, SMVO is found to be a half-metallic ferromagnetic (HM-FM) compound with a band gap of 0.65 eV in a spin down channel with off-centered displacement of V atoms in the octahedral cage (second order Jahn -Teller effect) which can cause ferroelectricity. Therefore, SMVO is predicted to be a polar HM material and a promising candidate for multiferroic property with potential application in spintronics.
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Affiliation(s)
- Neda Rahmani
- Faculty of Physics, Shahrood University of Technology, Shahrood, Iran. Department of Physics and Astronomy, Uppsala University, Box 516, 75120, Uppsala, Sweden
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44
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Kawai K, Asakura D, Nishimura SI, Yamada A. Stabilization of a 4.5 V Cr 4+/Cr 3+ redox reaction in NASICON-type Na 3Cr 2(PO 4) 3 by Ti substitution. Chem Commun (Camb) 2019; 55:13717-13720. [PMID: 31657818 DOI: 10.1039/c9cc04860j] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of high-voltage cathode materials composed of abundant metals for rechargeable batteries is a crucial task to realize higher energy density in large-scale electrical energy storage systems. Here we report a reversible Cr4+/Cr3+ redox reaction at 4.5 V vs. Na/Na+ in NASICON-type Na2CrTi(PO4)3 (NCTP). An unstable Cr4+/Cr3+ redox in Na3Cr2(PO4)3 is successfully stabilized by the substitution of Ti with Cr. The charge/discharge mechanism of NCTP was studied by powder X-ray diffraction and soft X-ray absorption spectroscopy.
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Affiliation(s)
- Kosuke Kawai
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan. .-tokyo.ac.jp
| | - Daisuke Asakura
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8564, Japan
| | - Shin-Ichi Nishimura
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan. .-tokyo.ac.jp and Elemental Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Atsuo Yamada
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan. .-tokyo.ac.jp and Elemental Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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45
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Selb E, Declara L, Bayarjargal L, Podewitz M, Tribus M, Heymann G. Crystal Structure and Properties of a UV-Transparent High-Pressure Polymorph of Mg3
TeO6
with Second Harmonic Generation Response. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900998] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elisabeth Selb
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Lisa Declara
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Lkhamsuren Bayarjargal
- Institut für Geowissenschaften; Universität Frankfurt; Altenhöferallee 1 60438 Frankfurt/Main Germany
| | - Maren Podewitz
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Martina Tribus
- Institut für Mineralogie und Petrographie; Leopold-Franzens-Universität Innsbruck; Innrain 52 6020 Innsbruck Austria
| | - Gunter Heymann
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
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46
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Cross JN, Lee TH, Kang CJ, Yao YX, Cary SK, Stritzinger JT, Polinski MJ, McKinley CD, Albrecht Schmitt TE, Lanata N. Origins of the odd optical observables in plutonium and americium tungstates. Chem Sci 2019; 10:6508-6518. [PMID: 31341603 PMCID: PMC6610570 DOI: 10.1039/c9sc01174a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/17/2019] [Indexed: 11/21/2022] Open
Abstract
A series of f-block tungstates show atypical coloration for both the Ce(iii) and Pu(iii) compounds; whereas the other lanthanide and Am(iii) compounds possess normal absorption features. The different optical properties are actually derived from the tungstate component rather than from 5f electrons/orbitals.
A series of trivalent f-block tungstates, MW2O7(OH)(H2O) (M = La, Ce, Pr, Nd, and Pu) and AmWO4(OH), have been prepared in crystalline form using hydrothermal methods. Both structure types take the form of 3D networks where MW2O7(OH)(H2O) is assembled from infinite chains of distorted tungstate octahedra linked by isolated MO8 bicapped trigonal prisms; whereas AmWO4(OH) is constructed from edge-sharing AmO8 square antiprisms connected by distorted tungstate trigonal bipyramids. PuW2O7(OH)(H2O) crystallizes as red plates; an atypical color for a Pu(iii) compound. Optical absorption spectra acquired from single crystals show strong, broadband absorption in the visible region. A similar feature is observed for CeW2O7(OH)(H2O), but not for AmWO4(OH). Here we demonstrate that these significantly different optical properties do not stem directly from the 5f electrons, as in both systems the valence band has mostly O-2p character and the conduction band has mostly W-5d character. Furthermore, the quasi-particle gap is essentially unaffected by the 5f degrees of freedom. Despite this, our analysis demonstrates that the f-electron covalency effects are quite important and substantially different energetically in PuW2O7(OH)(H2O) and AmWO4(OH), indicating that the optical gap alone cannot be used to infer conclusions concerning the f electron contribution to the chemical bond in these systems.
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Affiliation(s)
- Justin N Cross
- Chemistry Division and the Plutonium Science and Manufacturing Directorate , Los Alamos National Laboratory , PO Box 1663 , Los Alamos , New Mexico , 87545 USA
| | - Tsung-Han Lee
- Department of Physics and Astronomy , Rutgers University , Piscataway , New Jersey 08856 , USA
| | - Chang-Jong Kang
- Department of Physics and Astronomy , Rutgers University , Piscataway , New Jersey 08856 , USA
| | - Yong-Xin Yao
- Department of Physics and Astronomy and Ames Laboratory , U.S. Department of Energy , Iowa State University , Ames , Iowa 50011 , USA
| | - Samantha K Cary
- Chemistry Division and the Plutonium Science and Manufacturing Directorate , Los Alamos National Laboratory , PO Box 1663 , Los Alamos , New Mexico , 87545 USA
| | - Jared T Stritzinger
- Chemistry Division and the Plutonium Science and Manufacturing Directorate , Los Alamos National Laboratory , PO Box 1663 , Los Alamos , New Mexico , 87545 USA
| | - Matthew J Polinski
- Department of Chemistry and Biochemistry , Bloomsburg University of Pennsylvania , Bloomsburg , Pennsylvania 17815 , USA
| | - Carla D McKinley
- Department of Chemistry and Biochemistry , Florida State University , 95 Chieftan Way, 310 DLC , Tallahassee , Florida 32306 , USA .
| | - Thomas E Albrecht Schmitt
- Department of Chemistry and Biochemistry , Florida State University , 95 Chieftan Way, 310 DLC , Tallahassee , Florida 32306 , USA .
| | - Nicola Lanata
- Department of Physics and Astronomy , Aarhus University , 8000 , Aarhus C , Denmark .
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47
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Lee S, Jo H, Ok KM. Bi2Te2O6(NO3)2(OH)2(H2O): A layered bismuth tellurium nitrate hydroxide with multiple noncentrosymmetric chromophores. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Nakamura T, Kudo T. The planarity of heteroatom analogues of benzene: Energy component analysis and the planarization of hexasilabenzene. J Comput Chem 2019; 40:581-590. [PMID: 30575087 DOI: 10.1002/jcc.25743] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/03/2018] [Accepted: 10/09/2018] [Indexed: 11/07/2022]
Abstract
There are various nonplanar heteroatom analogues of benzene-cyclic 6π electron systems-and among them, hexasilabenzene (Si6 H6 ) is well known as a typical example. To determine the factors that control their planarity, quantum chemical calculations and an energy component analysis were performed. The results show that the energy components mainly controlling the planarity of benzene and hexasilabenzene are different. For hexasilabenzene, electron repulsion energy was found to be significantly important for the planarity. The application of the pseudo Jahn-Teller effect and the Carter-Goddard-Malrieu-Trinquier model for the interpretation of the planarity of the benzene analogues was also investigated. Furthermore, based on the quantitative results, it was revealed that the planarization of hexasilabenzene is realized by introducing substituents with π-accepting ability, such as the boryl group, that bring about a reduction of the π-electron repulsion on the silicon skeleton. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Taiji Nakamura
- Devision of Pure and Applied Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Takako Kudo
- Devision of Pure and Applied Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
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49
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Ai H, Song X, Qi S, Li W, Zhao M. Intrinsic multiferroicity in two-dimensional VOCl 2 monolayers. NANOSCALE 2019; 11:1103-1110. [PMID: 30574655 DOI: 10.1039/c8nr08270g] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The coexistence of ferroelectricity and magnetism in two-dimensional (2D) multiferroic materials with the thickness of few atomic layers offers a tantalizing potential for high-density multistate data storage but has been rarely verified in experiments. Herein, we propose a realistic 2D multiferroic material, VOCl2 monolayer, which is mechanically strippable from the bulk material. It has a large intrinsic in-plane spontaneous electric polarization of 312 pC m-1 and stable antiferromagnetism with the Néel temperature of 177 K. The off-center displacement of V ions that contributes to the ferroelectricity can be ascribed to the pseudo Jahn-Teller distortion. The energy barrier (0.18 eV) between two ferroelectric states with opposite electronic polarization renders the thermodynamic stability of the ferroelectricity and the switchability of the electric polarizations. The interplay between electric polarization and magnetism would lead to tunable ferroelectricity. Our findings are expected to offer a realistic platform for the study of 2D multiferroic materials as well as their applications in miniaturized memory devices.
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Affiliation(s)
- Haoqiang Ai
- School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China.
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50
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Cho EJ, Oh SJ, Jo H, Lee J, You TS, Ok KM. Layered Bismuth Oxyfluoride Nitrates Revealing Large Second-Harmonic Generation and Photocatalytic Properties. Inorg Chem 2019; 58:2183-2190. [DOI: 10.1021/acs.inorgchem.8b03343] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Eun Jeong Cho
- Department of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Seung-Jin Oh
- Department of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hongil Jo
- Department of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Junsu Lee
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Tae-Soo You
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Kang Min Ok
- Department of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
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