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Li C, Liu K, Jiang D, Yan H, Chen E, Ma Y, Cheng H, Wen T, Yue B, Wang Y. Pressure-Driven Polymorphic Transition, Emergent Insulator-To-Metal Transition, and Photoconductivity Switching in Violet Phosphorus. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306758. [PMID: 37852946 DOI: 10.1002/smll.202306758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Indexed: 10/20/2023]
Abstract
Polymorphic phase transition is an essential phenomenon in condensed matter that the physical properties of materials may undergo significant changes due to the structural transformation. Phase transition has thus become an important means and dimension for regulating material properties. Herein, this study demonstrates the pressure-induced multi-transition of both structure and physical properties in violet phosphorus, a novel phosphorus allotrope. Under compression, violet phosphorus undergoes sequential polymorphic phase transitions. Concomitant with the first phase transition, violet phosphorus exhibits emergent insulator-metal transition, superconductivity, and dramatic switching from positive to negative photoconductivity. Remarkably, the resistance of violet phosphorus shows a sudden drop of around 107 along with the phase transition. In addition, piezochromism from translucent red to opaque black and suppression of photoluminescence are observed upon compression. Of particular interest is that the sample irreversibly transforms into black phosphorus with a pronounced discrepancy in physical properties from the pristine violet phosphorus after decompression. The abundant polymorphic transitions and property changes in violet phosphorus have significant implications for designing novel pressure-responsive electronic/optoelectronic devices and exploring concealed polymorphic transition materials.
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Affiliation(s)
- Chen Li
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Ke Liu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Dequan Jiang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Huacai Yan
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - En Chen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Yingying Ma
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Haoming Cheng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Ting Wen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Binbin Yue
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Yonggang Wang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
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2
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Günther D, Baumann D, Schnick W, Oeckler O. Modular Principle for Complex Disordered Tetrahedral Frameworks in Quenched High-Pressure Phases of Phosphorus Oxide Nitrides. Chemistry 2023; 29:e202203892. [PMID: 36720700 DOI: 10.1002/chem.202203892] [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: 12/12/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/02/2023]
Abstract
The crystal structures of the new phosphorus oxide nitrides P40 O31 N46 and P74 O59 N84 , which were synthesized from amorphous phosphorus oxide nitride imide, exhibit complex frameworks built up from P(O,N)4 tetrahedra. The latter form various chain-like building units with various degrees of branching. These modular units can be combined and arranged in different ways, which leads to closely related structures and several disordered configurations in each compound. As the material was obtained by high-pressure high-temperature synthesis, the disorder is most likely a consequence of quenching a high-pressure phase with P(O,N)5 trigonal bipyramids. Under ambient conditions, P atoms are expected to relax by moving to the centers of the face-sharing tetrahedra that constitute the bipyramid. Diffraction patterns acquired with microfocused synchrotron radiation reveal that domains of both compounds are intergrown with H3 P8 O8 N9 , whose tetrahedral framework represents a cutout of the structures of both P40 O31 N46 and P74 O59 N84 . Powder diffraction patterns do not indicate any further phases.
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Affiliation(s)
- Daniel Günther
- Faculty for Chemistry and Mineralogy, Institute for Mineralogy, Crystallography and Materials Science, Leipzig University, Scharnhorststraße 20, 04275, Leipzig, Germany
| | - Dominik Baumann
- University of Munich (LMU), Butenandtstraße 5-13, (D) 81377, München, Germany
| | - Wolfgang Schnick
- University of Munich (LMU), Butenandtstraße 5-13, (D) 81377, München, Germany
| | - Oliver Oeckler
- Faculty for Chemistry and Mineralogy, Institute for Mineralogy, Crystallography and Materials Science, Leipzig University, Scharnhorststraße 20, 04275, Leipzig, Germany
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3
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Petersen H, Stegmann N, Fischer M, Zibrowius B, Radev I, Philippi W, Schmidt W, Weidenthaler C. Crystal Structures of Two Titanium Phosphate-Based Proton Conductors: Ab Initio Structure Solution and Materials Properties. Inorg Chem 2021; 61:2379-2390. [PMID: 34807595 PMCID: PMC8826274 DOI: 10.1021/acs.inorgchem.1c02613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Transition-metal
phosphates show a wide range of chemical compositions,
variations of the valence states, and crystal structures. They are
commercially used as solid-state catalysts, cathode materials in rechargeable
batteries, or potential candidates for proton-exchange membranes in
fuel cells. Here, we report on the successful ab initio structure
determination of two novel titanium pyrophosphates, Ti(III)p and Ti(IV)p,
from powder X-ray diffraction (PXRD) data. The low-symmetry space
groups P21/c for Ti(III)p and P1̅ for
Ti(IV)p required the combination of spectroscopic and diffraction
techniques for structure determination. In Ti(III)p, trivalent titanium
ions occupy the center of TiO6 polyhedra, coordinated by
five pyrophosphate groups, one of them as a bidentate ligand. This
secondary coordination causes the formation of one-dimensional six-membered
ring channels with a diameter dmax of
3.93(2) Å, which is stabilized by NH4+ ions.
Annealing Ti(III)p in inert atmospheres results in the formation of
a new compound, denoted as Ti(IV)p. The structure of this compound
shows a similar three-dimensional framework consisting of [PO4]3– tetrahedra and TiIV+O6 octahedra and an empty one-dimensional channel with a diameter dmax of 5.07(1) Å. The in situ PXRD of the transformation of Ti(III)p to Ti(IV)p reveals a two-step
mechanism, i.e., the decomposition of NH4+ ions
in a first step and subsequent structure relaxation. The specific
proton conductivity and activation energy of the proton migration
of Ti(III)p, governed by the Grotthus mechanism, belong to the highest
and lowest, respectively, ever reported for this class of materials,
which reveals its potential application in electrochemical devices
like fuel cells and water electrolyzers in the intermediate temperature
range. The crystal structures of two novel transition-metal
phosphates
were solved via the combination of spectroscopic and diffraction methods.
The reaction mechanism of the transformation of the structures was
studied in situ. Additionally, the proton conductivity
of the compounds was analyzed.
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Affiliation(s)
- Hilke Petersen
- Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Niklas Stegmann
- Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Michael Fischer
- MAPEX Center for Materials and Processes, University of Bremen, 28334 Bremen, Germany.,Crystallography/Geosciences, University of Bremen, Klagenfurter Straße, 28359 Bremen, Germany
| | - Bodo Zibrowius
- Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Ivan Radev
- The Hydrogen and Fuel Cell Center ZBT GmbH, Carl-Benz-Straße 201, 47057 Duisburg, Germany
| | - Wladimir Philippi
- The Hydrogen and Fuel Cell Center ZBT GmbH, Carl-Benz-Straße 201, 47057 Duisburg, Germany
| | - Wolfgang Schmidt
- Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Claudia Weidenthaler
- Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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4
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Bykov M, Bykova E, Ponomareva AV, Abrikosov IA, Chariton S, Prakapenka VB, Mahmood MF, Dubrovinsky L, Goncharov AF. Stabilization of Polynitrogen Anions in Tantalum–Nitrogen Compounds at High Pressure. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maxim Bykov
- Department of Mathematics Howard University Washington DC 20059 USA
- The Earth and Planets Laboratory Carnegie Institution for Science Washington DC 20015 USA
| | - Elena Bykova
- The Earth and Planets Laboratory Carnegie Institution for Science Washington DC 20015 USA
| | - Alena V. Ponomareva
- Materials Modeling and Development Laboratory, National University of Science and Technology 'MISIS' 119049 Moscow Russia
| | - Igor A. Abrikosov
- Department of Physics, Chemistry and Biology (IFM) Linköping University 58183 Linköping Sweden
| | - Stella Chariton
- Center for Advanced Radiation Sources University of Chicago Lemont IL 60437 USA
| | | | | | | | - Alexander F. Goncharov
- The Earth and Planets Laboratory Carnegie Institution for Science Washington DC 20015 USA
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5
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Bykov M, Bykova E, Ponomareva AV, Abrikosov IA, Chariton S, Prakapenka VB, Mahmood MF, Dubrovinsky L, Goncharov AF. Stabilization of Polynitrogen Anions in Tantalum–Nitrogen Compounds at High Pressure. Angew Chem Int Ed Engl 2021; 60:9003-9008. [DOI: 10.1002/anie.202100283] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Indexed: 02/03/2023]
Affiliation(s)
- Maxim Bykov
- Department of Mathematics Howard University Washington DC 20059 USA
- The Earth and Planets Laboratory Carnegie Institution for Science Washington DC 20015 USA
| | - Elena Bykova
- The Earth and Planets Laboratory Carnegie Institution for Science Washington DC 20015 USA
| | - Alena V. Ponomareva
- Materials Modeling and Development Laboratory, National University of Science and Technology 'MISIS' 119049 Moscow Russia
| | - Igor A. Abrikosov
- Department of Physics, Chemistry and Biology (IFM) Linköping University 58183 Linköping Sweden
| | - Stella Chariton
- Center for Advanced Radiation Sources University of Chicago Lemont IL 60437 USA
| | | | | | | | - Alexander F. Goncharov
- The Earth and Planets Laboratory Carnegie Institution for Science Washington DC 20015 USA
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6
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Pereira ALDJ, Santamaría-Pérez D, Vilaplana R, Errandonea D, Popescu C, da Silva EL, Sans JA, Rodríguez-Carvajal J, Muñoz A, Rodríguez-Hernández P, Mujica A, Radescu SE, Beltrán A, Otero-de-la-Roza A, Nalin M, Mollar M, Manjón FJ. Experimental and Theoretical Study of SbPO 4 under Compression. Inorg Chem 2020; 59:287-307. [PMID: 31876414 DOI: 10.1021/acs.inorgchem.9b02268] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
SbPO4 is a complex monoclinic layered material characterized by a strong activity of the nonbonding lone electron pair (LEP) of Sb. The strong cation LEP leads to the formation of layers piled up along the a axis and linked by weak Sb-O electrostatic interactions. In fact, Sb has 4-fold coordination with O similarly to what occurs with the P-O coordination, despite the large difference in ionic radii and electronegativity between both elements. Here we report a joint experimental and theoretical study of the structural and vibrational properties of SbPO4 at high pressure. We show that SbPO4 is not only one of the most compressible phosphates but also one of the most compressible compounds of the ABO4 family. Moreover, it has a considerable anisotropic compression behavior, with the largest compression occurring along a direction close to the a axis and governed by the compression of the LEP and the weak interlayer Sb-O bonds. The strong compression along the a axis leads to a subtle modification of the monoclinic crystal structure above 3 GPa, leading from a 2D to a 3D material. Moreover, the onset of a reversible pressure-induced phase transition is observed above 9 GPa, which is completed above 20 GPa. We propose that the high-pressure phase is a triclinic distortion of the original monoclinic phase. The understanding of the compression mechanism of SbPO4 can aid to improve the ion intercalation and catalytic properties of this layered compound.
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Affiliation(s)
- André Luis de Jesus Pereira
- Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team , Universitat Politècnica de València , València , Spain.,Grupo de Pesquisa de Materiais Fotonicos e Energia Renovável-MaFER , Universidade Federal da Grande Dourados , Dourados , Mato Grosso do Sul , Brazil
| | - David Santamaría-Pérez
- Departament de Física Aplicada-ICMUV, MALTA Consolider Team , Universitat de València , Burjassot , Spain
| | - Rosário Vilaplana
- Centro de Tecnologías Físicas, MALTA Consolider Team , Universitat Politecnica de València , València 46022 , Spain
| | - Daniel Errandonea
- Departament de Física Aplicada-ICMUV, MALTA Consolider Team , Universitat de València , Burjassot , Spain
| | - Catalin Popescu
- CELLS-ALBA Synchrotron Light Facility , 08290 Cerdanyola, Barcelona , Spain
| | - Estelina Lora da Silva
- Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team , Universitat Politècnica de València , València , Spain
| | - Juan Angel Sans
- Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team , Universitat Politècnica de València , València , Spain
| | | | - Alfonso Muñoz
- Departamento de Física, Instituto de Materiales y Nanotecnología, MALTA Consolider Team , Universidad de La Laguna , Tenerife , Spain
| | - Plácida Rodríguez-Hernández
- Departamento de Física, Instituto de Materiales y Nanotecnología, MALTA Consolider Team , Universidad de La Laguna , Tenerife , Spain
| | - Andres Mujica
- Departamento de Física, Instituto de Materiales y Nanotecnología, MALTA Consolider Team , Universidad de La Laguna , Tenerife , Spain
| | - Silvana Elena Radescu
- Departamento de Física, Instituto de Materiales y Nanotecnología, MALTA Consolider Team , Universidad de La Laguna , Tenerife , Spain
| | - Armando Beltrán
- Departament de Química Física i Analítica, MALTA Consolider Team , Universitat Jaume I , Castelló , Spain
| | - Alberto Otero-de-la-Roza
- Departamento de Química Física y Analítica, MALTA Consolider Team , Universidad de Oviedo , 33006 Oviedo , Spain
| | - Marcelo Nalin
- Instituto de Quimica, Departamento de Química Geral e Inorgânica , UNESP-Campus de Araraquara , São Paulo , Brazil
| | - Miguel Mollar
- Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team , Universitat Politècnica de València , València , Spain
| | - Francisco Javier Manjón
- Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team , Universitat Politècnica de València , València , Spain
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7
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Errandonea D. Exploring the high-pressure behaviour of polymorphs of AMO4 ternary oxides: crystal structure and physical properties. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1663-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Vogel S, Bykov M, Bykova E, Wendl S, Kloß SD, Pakhomova A, Chariton S, Koemets E, Dubrovinskaia N, Dubrovinsky L, Schnick W. Boron Phosphorus Nitride at Extremes: PN 6 Octahedra in the High-Pressure Polymorph β-BP 3 N 6. Angew Chem Int Ed Engl 2019; 58:9060-9063. [PMID: 31020764 DOI: 10.1002/anie.201902845] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Indexed: 01/12/2023]
Abstract
The high-pressure behavior of non-metal nitrides is of special interest for inorganic and theoretical chemistry as well as materials science, as these compounds feature intriguing elastic properties. The double nitride α-BP3 N6 was investigated by in situ single-crystal X-ray diffraction (XRD) upon cold compression to a maximum pressure of about 42 GPa, and its isothermal bulk modulus at ambient conditions was determined to be 146(6) GPa. At maximum pressure the sample was laser-heated, which resulted in the formation of an unprecedented high-pressure polymorph, β-BP3 N6 . Its structure was elucidated by single-crystal XRD, and can be described as a decoration of a distorted hexagonal close packing of N with B in tetrahedral and P in octahedral voids. Hence, β-BP3 N6 is the first nitride to contain PN6 octahedra, representing the much sought-after proof of principle for sixfold N-coordinated P that has been predicted for numerous high-pressure phases of nitrides.
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Affiliation(s)
- Sebastian Vogel
- Department of Chemistry, University of Munich (LMU), Butenandtstraße 5-13, 81377, Munich, Germany
| | - Maxim Bykov
- Bayerisches Geoinstitut (BGI), University of Bayreuth, 95440, Bayreuth, Germany
| | - Elena Bykova
- Deutsches Elektronen-Synchrotron (DESY), 22607, Hamburg, Germany
| | - Sebastian Wendl
- Department of Chemistry, University of Munich (LMU), Butenandtstraße 5-13, 81377, Munich, Germany
| | - Simon D Kloß
- Department of Chemistry, University of Munich (LMU), Butenandtstraße 5-13, 81377, Munich, Germany
| | - Anna Pakhomova
- Deutsches Elektronen-Synchrotron (DESY), 22607, Hamburg, Germany
| | - Stella Chariton
- Bayerisches Geoinstitut (BGI), University of Bayreuth, 95440, Bayreuth, Germany
| | - Egor Koemets
- Bayerisches Geoinstitut (BGI), University of Bayreuth, 95440, Bayreuth, Germany
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme Conditions, University of Bayreuth, 95440, Bayreuth, Germany
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut (BGI), University of Bayreuth, 95440, Bayreuth, Germany
| | - Wolfgang Schnick
- Department of Chemistry, University of Munich (LMU), Butenandtstraße 5-13, 81377, Munich, Germany
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9
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Penta- and hexa-coordinated beryllium and phosphorus in high-pressure modifications of CaBe 2P 2O 8. Nat Commun 2019; 10:2800. [PMID: 31243286 PMCID: PMC6594954 DOI: 10.1038/s41467-019-10589-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 05/08/2019] [Indexed: 11/23/2022] Open
Abstract
Beryllium oxides have been extensively studied due to their unique chemical properties and important technological applications. Typically, in inorganic compounds beryllium is tetrahedrally coordinated by oxygen atoms. Herein based on results of in situ single crystal X-ray diffraction studies and ab initio calculations we report on the high-pressure behavior of CaBe2P2O8, to the best of our knowledge the first compound showing a step-wise transition of Be coordination from tetrahedral (4) to octahedral (6) through trigonal bipyramidal (5). It is remarkable that the same transformation route is observed for phosphorus. Our theoretical analysis suggests that the sequence of structural transitions of CaBe2P2O8 is associated with the electronic transformation from predominantly molecular orbitals at low pressure to the state with overlapping electronic clouds of anions orbitals. Beryllium in inorganic compounds is usually coordinated to four oxygen atoms, but higher coordination numbers have been predicted. Here the authors observe a pressure induced stepwise transition in CaBe2P2O8 where Be coordination changes to trigonal-bipyramidal and octahedral, implying that d orbitals are not mandatory for high coordination.
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10
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Vogel S, Bykov M, Bykova E, Wendl S, Kloß SD, Pakhomova A, Chariton S, Koemets E, Dubrovinskaia N, Dubrovinsky L, Schnick W. Boron Phosphorus Nitride at Extremes: PN
6
Octahedra in the High‐Pressure Polymorph β‐BP
3
N
6. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902845] [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)
- Sebastian Vogel
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Maxim Bykov
- Bayerisches Geoinstitut (BGI)University of Bayreuth 95440 Bayreuth Germany
| | - Elena Bykova
- Deutsches Elektronen-Synchrotron (DESY) 22607 Hamburg Germany
| | - Sebastian Wendl
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Simon D. Kloß
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Anna Pakhomova
- Deutsches Elektronen-Synchrotron (DESY) 22607 Hamburg Germany
| | - Stella Chariton
- Bayerisches Geoinstitut (BGI)University of Bayreuth 95440 Bayreuth Germany
| | - Egor Koemets
- Bayerisches Geoinstitut (BGI)University of Bayreuth 95440 Bayreuth Germany
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme ConditionsUniversity of Bayreuth 95440 Bayreuth Germany
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut (BGI)University of Bayreuth 95440 Bayreuth Germany
| | - Wolfgang Schnick
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
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11
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Raguž B, Wittich K, Glaum R. Two New, Metastable Polymorphs of Lithium Pyrophosphate Li
4
P
2
O
7. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801100] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Branimir Raguž
- Institut für Anorganische Chemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
| | - Knut Wittich
- Institut für Anorganische Chemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
| | - Robert Glaum
- Institut für Anorganische Chemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Gerhard‐Domagk‐Straße 1 53121 Bonn Germany
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12
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Abstract
A Verwey-type charge-ordering transition in magnetite at 120 K leads to the formation of linear units of three iron ions with one shared electron, called trimerons. The recently-discovered iron pentoxide (Fe4O5) comprising mixed-valent iron cations at octahedral chains, demonstrates another unusual charge-ordering transition at 150 K involving competing formation of iron trimerons and dimerons. Here, we experimentally show that applied pressure can tune the charge-ordering pattern in Fe4O5 and strongly affect the ordering temperature. We report two charge-ordered phases, the first of which may comprise both dimeron and trimeron units, whereas, the second exhibits an overall dimerization involving both the octahedral and trigonal-prismatic chains of iron in the crystal structure. We link the dramatic change in the charge-ordering pattern in the second phase to redistribution of electrons between the octahedral and prismatic iron chains, and propose that the average oxidation state of the iron cations can pre-determine a charge-ordering pattern. The charge order transition of commonly known magnetite has only recently been unraveled. Here, the measurement of the low-temperature high-pressure phase diagram of a related material (Fe4O5) elucidates the interplay of average oxidation state and charge-ordering phenomena in the iron oxide family.
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13
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Vogel S, Baumann D, Niklaus R, Bykova E, Bykov M, Dubrovinskaia N, Dubrovinsky L, Schnick W. Stishovite's Relative: A Post-Coesite Form of Phosphorus Oxonitride. Angew Chem Int Ed Engl 2018; 57:6691-6695. [PMID: 29656431 DOI: 10.1002/anie.201803610] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Indexed: 11/07/2022]
Abstract
Phosphorus oxonitride (PON) is isoelectronic with SiO2 and may exhibit a similar broad spectrum of intriguing properties as silica. However, PON has only been sparsely investigated under high-pressure conditions and there has been no evidence on a PON polymorph with a coordination number of P greater than 4. Herein, we report a post-coesite (pc) PON polymorph exhibiting a stishovite-related structure with P in a (5+1) coordination. The pc-PON was synthesized using the multianvil technique and characterized by powder X-ray diffraction, solid-state NMR spectroscopy, TEM measurements and in situ synchrotron X-ray diffraction in diamond anvil cells. The structure model was verified by single-crystal X-ray diffraction at 1.8 GPa and the isothermal bulk modulus of pc-PON was determined to K0 =163(2) GPa. Moreover, an orthorhombic PON polymorph (o-PON) was observed under high-pressure conditions and corroborated as the stable modification at pressures above 17 GPa by DFT calculations.
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Affiliation(s)
- Sebastian Vogel
- Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377, Munich, Germany
| | - Dominik Baumann
- Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377, Munich, Germany
| | - Robin Niklaus
- Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377, Munich, Germany
| | - Elena Bykova
- Deutsches Elektronen-Synchrotron (DESY), 22607, Hamburg, Germany
| | - Maxim Bykov
- Bayerisches Geoinstitut (BGI), University of Bayreuth, 95440, Bayreuth, Germany
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme Conditions, University of Bayreuth, 95440, Bayreuth, Germany
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut (BGI), University of Bayreuth, 95440, Bayreuth, Germany
| | - Wolfgang Schnick
- Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377, Munich, Germany
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14
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Vogel S, Baumann D, Niklaus R, Bykova E, Bykov M, Dubrovinskaia N, Dubrovinsky L, Schnick W. Stishovite's Relative: A Post‐Coesite Form of Phosphorus Oxonitride. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sebastian Vogel
- Department of ChemistryUniversity of Munich (LMU) Butenandtstrasse 5–13 81377 Munich Germany
| | - Dominik Baumann
- Department of ChemistryUniversity of Munich (LMU) Butenandtstrasse 5–13 81377 Munich Germany
| | - Robin Niklaus
- Department of ChemistryUniversity of Munich (LMU) Butenandtstrasse 5–13 81377 Munich Germany
| | - Elena Bykova
- Deutsches Elektronen-Synchrotron (DESY) 22607 Hamburg Germany
| | - Maxim Bykov
- Bayerisches Geoinstitut (BGI)University of Bayreuth 95440 Bayreuth Germany
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme ConditionsUniversity of Bayreuth 95440 Bayreuth Germany
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut (BGI)University of Bayreuth 95440 Bayreuth Germany
| | - Wolfgang Schnick
- Department of ChemistryUniversity of Munich (LMU) Butenandtstrasse 5–13 81377 Munich Germany
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15
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Two-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditions. Nat Chem 2018; 10:776-779. [DOI: 10.1038/s41557-018-0061-4] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 04/05/2018] [Indexed: 11/08/2022]
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16
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Zhang X, Wu H, Liu Q, Dong X, Chen Y, Yang Z, Wen XD, Pan S. Application of the dimensional reduction formalism to Pb9−xBax[Li2(P2O7)2(P4O13)2] (x = 0, 2, 6, 7): a series of phosphates with two types of isolated polyphosphate groups. Dalton Trans 2017; 46:4678-4684. [DOI: 10.1039/c7dt00509a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Dimensional reduction is used to design and synthesise Pb9[Li2(P2O7)2(P4O13)2] by using Li2O to dismantle Pb3P4O13.
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Affiliation(s)
- Xiangyu Zhang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Hongping Wu
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS
- Xinjiang Technical Institute of Physics & Chemistry of CAS
- Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
| | - Qiong Liu
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS
- Xinjiang Technical Institute of Physics & Chemistry of CAS
- Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
| | - Xiaoyu Dong
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS
- Xinjiang Technical Institute of Physics & Chemistry of CAS
- Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
| | - Yunlei Chen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Zhihua Yang
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS
- Xinjiang Technical Institute of Physics & Chemistry of CAS
- Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Shilie Pan
- Key Laboratory of Functional Materials and Devices for Special Environments of CAS
- Xinjiang Technical Institute of Physics & Chemistry of CAS
- Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
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