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Silva RX, Hora RR, Nonato A, García-Fernández A, Salgado-Beceiro J, Señarís-Rodríguez MA, Andújar MS, Ayala AP, Paschoal CWA. Order-disorder phase transition and molecular dynamics in the hybrid perovskite [(CH 3) 3NH][Mn(N 3) 3]. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 289:122198. [PMID: 36502746 DOI: 10.1016/j.saa.2022.122198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 11/08/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
We present a temperature-dependent Raman scattering study of a [(CH3)3NH][Mn(N3)3] hybrid organic-inorganic azide-perovskite, in which we have analysed in detail the wavenumber and full width at half-maximum (FWHM) of lattice modes and internal modes of the NC3 skeleton, N3- and CH3 molecular groups. In general, the modes exhibited unusual behaviour during the phase transitions, including discontinuity in the phonon wavenumber, bandwidth, and unconventional shifts upon temperature variation. Spectral features on heating reveal the absence of significant distortions in the NC3 skeleton and a relatively restricted order-disorder process of the TrMA+ cations. On the other hand, linewidth anomalies of the δNC3 and νasNC3 modes have been attributed to the molecular dynamics of encapsulated cations. The unconventional blue shift of the symmetric stretching modes of azide ligands indicates the weakening of the intermolecular interactions between the TrMA+ cations and azido-bridges, and the strengthening of the intramolecular bonds. Additionally, we have used differential scanning calorimetry to confirm the subtle monoclinic to monoclinic (P21/c → C2/c) phase transition at around 330 K; and the phase transition to trigonal structure (R3¯m) above 359 K, whose associated entropy variation turns to be |ΔS| ∼ 22.3 J·kg-1 K-1 and displays a barocaloric (BC) tunability |δTt/δP| ∼ 3.17 K kbar-1, according to our estimations using the Clausius-Clapeyron method. Although the obtained values of entropy change and BC tunability are very close to those reported on formate-perovskites and other important caloric materials, those parameters are much lower than the giant entropy change of ∼80 Jkg-1 K-1 and large BC tunability ∼12 K kbar-1 observed for the analogue azide-perovskite [(CH3)4N][Mn(N3)]3 (TMAMnN3). Very interestingly, our combined study shed light to understand such different behaviour, as they reveal that the hydrogen bonds created between the TrMA+ cations and the framework prevent an extensive order-disorder process that is needed to obtain large entropy changes and large BC coefficients as it occurs in the case of related azide-perovskites with no H-bonds between the A cations (for example TMA) and the framework.
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Affiliation(s)
- R X Silva
- Departamento de Física, Universidade Federal do Ceará, Campus do Pici, 65455-900 Fortaleza, CE, Brazil; Coordenação de Ciências Naturais, Universidade Federal do Maranhão, Campus de Codó, 65400-000 Codó, MA, Brazil.
| | - R R Hora
- Departamento de Física, Universidade Federal do Ceará, Campus do Pici, 65455-900 Fortaleza, CE, Brazil
| | - A Nonato
- Coordenação de Ciências Naturais, Universidade Federal do Maranhão, Campus de Bacabal, 65700-000 Bacabal, MA, Brazil
| | - Alberto García-Fernández
- Grupo QuiMolMat, Departamento de Química Fundamental, Facultad de Ciencias y CICA, Universidade da Coruña, Campus A Coruña, 15071 A Coruña, Spain
| | - Jorge Salgado-Beceiro
- Grupo QuiMolMat, Departamento de Química Fundamental, Facultad de Ciencias y CICA, Universidade da Coruña, Campus A Coruña, 15071 A Coruña, Spain
| | - María Antonia Señarís-Rodríguez
- Grupo QuiMolMat, Departamento de Química Fundamental, Facultad de Ciencias y CICA, Universidade da Coruña, Campus A Coruña, 15071 A Coruña, Spain
| | - Manuel Sánchez Andújar
- Grupo QuiMolMat, Departamento de Química Fundamental, Facultad de Ciencias y CICA, Universidade da Coruña, Campus A Coruña, 15071 A Coruña, Spain
| | - A P Ayala
- Departamento de Física, Universidade Federal do Ceará, Campus do Pici, 65455-900 Fortaleza, CE, Brazil
| | - C W A Paschoal
- Departamento de Física, Universidade Federal do Ceará, Campus do Pici, 65455-900 Fortaleza, CE, Brazil
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2
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Ptak M, Sieradzki A, Šimėnas M, Maczka M. Molecular spectroscopy of hybrid organic–inorganic perovskites and related compounds. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214180] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Hadjiivanov KI, Panayotov DA, Mihaylov MY, Ivanova EZ, Chakarova KK, Andonova SM, Drenchev NL. Power of Infrared and Raman Spectroscopies to Characterize Metal-Organic Frameworks and Investigate Their Interaction with Guest Molecules. Chem Rev 2020; 121:1286-1424. [DOI: 10.1021/acs.chemrev.0c00487] [Citation(s) in RCA: 150] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
| | - Dimitar A. Panayotov
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Mihail Y. Mihaylov
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Elena Z. Ivanova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Kristina K. Chakarova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Stanislava M. Andonova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Nikola L. Drenchev
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
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4
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da Silva RX, de Araujo Paschoal CW, Costa dos Santos C, García-Fernández A, Salgado-Beceiro J, Señarís-Rodríguez MA, Sanchez-Andujar M, Nonato Almeida de Abreu Silva A. Raman Spectroscopy Studies on the Barocaloric Hybrid Perovskite [(CH 3) 4N][Cd(N 3) 3]. Molecules 2020; 25:molecules25204754. [PMID: 33081238 PMCID: PMC7587568 DOI: 10.3390/molecules25204754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/13/2020] [Accepted: 10/14/2020] [Indexed: 11/16/2022] Open
Abstract
Temperature-dependent Raman scattering and differential scanning calorimetry were applied to the study of the hybrid organic-inorganic azide-perovskite [(CH3)4N][Cd(N3)3], a compound with multiple structural phase transitions as a function of temperature. A significant entropy variation was observed associated to such phase transitions, |∆S| ~ 62.09 J·kg-1 K-1, together with both a positive high barocaloric (BC) coefficient |δTt/δP| ~ 12.39 K kbar-1 and an inverse barocaloric (BC) coefficient |δTt/δP| ~ -6.52 kbar-1, features that render this compound interesting for barocaloric applications. As for the obtained Raman spectra, they revealed that molecular vibrations associated to the NC4, N3- and CH3 molecular groups exhibit clear anomalies during the phase transitions, which include splits and discontinuity in the phonon wavenumber and lifetime. Furthermore, variation of the TMA+ and N3- modes with temperature revealed that while some modes follow the conventional red shift upon heating, others exhibit an unconventional blue shift, a result which was related to the weakening of the intermolecular interactions between the TMA (tetramethylammonium) cations and the azide ligands and the concomitant strengthening of the intramolecular bondings. Therefore, these studies show that Raman spectroscopy is a powerful tool to gain information about phase transitions, structures and intermolecular interactions between the A-cation and the framework, even in complex hybrid organic-inorganic perovskites with highly disordered phases.
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Affiliation(s)
- Rosivaldo Xavier da Silva
- Coordenação de Ciências Naturais, Universidade Federal do Maranhão, Campus VII, São Luís 65400-000, Brazil;
| | | | | | - Alberto García-Fernández
- Departamento de Química, Facultade de Ciencias y CICA, Universidade da Coruña, 15071 A Coruña, Spain; (A.G.-F.); (J.S.-B.); (M.S.-A.)
| | - Jorge Salgado-Beceiro
- Departamento de Química, Facultade de Ciencias y CICA, Universidade da Coruña, 15071 A Coruña, Spain; (A.G.-F.); (J.S.-B.); (M.S.-A.)
| | - María Antonia Señarís-Rodríguez
- Departamento de Química, Facultade de Ciencias y CICA, Universidade da Coruña, 15071 A Coruña, Spain; (A.G.-F.); (J.S.-B.); (M.S.-A.)
- Correspondence: (M.A.S.-R.); (A.N.A.d.A.S.); Tel.: +34-981-167000 (ext. 2013) (M.A.S.-R.); +55-98-982054803 (A.N.A.d.A.S.)
| | - Manuel Sanchez-Andujar
- Departamento de Química, Facultade de Ciencias y CICA, Universidade da Coruña, 15071 A Coruña, Spain; (A.G.-F.); (J.S.-B.); (M.S.-A.)
| | - Ariel Nonato Almeida de Abreu Silva
- Coordenação de Ciências Naturais, Universidade Federal do Maranhão, Campus do Bacabal, São Luís 65700-000, Brazil
- Correspondence: (M.A.S.-R.); (A.N.A.d.A.S.); Tel.: +34-981-167000 (ext. 2013) (M.A.S.-R.); +55-98-982054803 (A.N.A.d.A.S.)
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5
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Cañadillas-Delgado L, Fabelo O, Rodríguez-Velamazán JA, Stunault A, Zhao JP, Bu XH, Rodríguez-Carvajal J. Spin-density studies of the multiferroic metal-organic compound [NH 2(CH 3) 2][Fe IIIFe II(HCOO) 6]. IUCRJ 2020; 7:803-813. [PMID: 32939272 PMCID: PMC7467164 DOI: 10.1107/s205225252000737x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Polarized neutron diffraction is used to study in depth the magnetic properties of the heterometallic compound [NH2(CH3)2][FeIIIFeII(HCOO)6] and give insight into its magnetic behaviour, addressing open questions that will contribute to a better understanding of this attention-grabbing material and other related ones. Previous results revealed that upon cooling, the magnetic moments of the FeII and FeIII sites do not order simultaneously: the magnetization of the FeII site increases faster than that of the FeIII sites. Unpolarized neutron diffraction measurements at 2 K with no external field revealed some discrepancies in the saturation value of the magnetic signal on the FeIII sites and in the ferromagnetic moment along the c axis. These discrepancies could be related to the actual distribution of magnetic moment, since unpolarized neutron diffraction gives information on the magnetic moment localized only on the magnetic ions. Polarized neutron diffraction allows an analysis of the magnitude of the spin density over magnetic and non-magnetic ions (the organic ligand and the counterion), which can give a clue to explain the low saturation on the FeIII sites and the correlation with the physical measurements. The present study also contributes to the understanding of the magneto-electric behaviour of this compound, giving insight into the role of metal disorder in the origin of the structural phase transition, which is responsible for its antiferrolelectric order, and into the influence of spin-density delocalization on its magneto-electric properties, allowing a discussion of the alternative explanations given so far for its electric properties at low temperature.
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Affiliation(s)
| | - Oscar Fabelo
- Institut Laue Langevin, 71 avenue des Martyrs, CS 20156, Grenoble, Cedex 9 38042, France
| | | | - Anne Stunault
- Institut Laue Langevin, 71 avenue des Martyrs, CS 20156, Grenoble, Cedex 9 38042, France
| | - Jiong-Peng Zhao
- Department of Chemistry, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xian-He Bu
- Department of Chemistry, and TKL of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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6
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Clune A, Harms N, O'Neal KR, Hughey K, Smith KA, Obeysekera D, Haddock J, Dalal NS, Yang J, Liu Z, Musfeldt JL. Developing the Pressure-Temperature-Magnetic Field Phase Diagram of Multiferroic [(CH 3) 2NH 2]Mn(HCOO) 3. Inorg Chem 2020; 59:10083-10090. [PMID: 32635719 DOI: 10.1021/acs.inorgchem.0c01225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We combined Raman scattering and magnetic susceptibility to explore the properties of [(CH3)2NH2]Mn(HCOO)3 under compression. Analysis of the formate bending mode reveals a broad two-phase region surrounding the 4.2 GPa critical pressure that becomes increasingly sluggish below the order-disorder transition due to the extensive hydrogen-bonding network. Although the paraelectric and ferroelectric phases have different space groups at ambient-pressure conditions, they both drive toward P1 symmetry under compression. This is a direct consequence of how the order-disorder transition changes under pressure. We bring these findings together with prior magnetization work to create a pressure-temperature-magnetic field phase diagram, unveiling entanglement, competition, and a progression of symmetry-breaking effects that underlie functionality in this molecule-based multiferroic. That the high-pressure P1 phase is a subgroup of the ferroelectric Cc suggests the possibility of enhanced electric polarization as well as opportunity for strain control.
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Affiliation(s)
- Amanda Clune
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Nathan Harms
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Kenneth R O'Neal
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Kendall Hughey
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Kevin A Smith
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Dimuthu Obeysekera
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, United States.,Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - John Haddock
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Naresh S Dalal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Junjie Yang
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, United States.,Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Zhenxian Liu
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607-7059, United States
| | - Janice L Musfeldt
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States.,Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States
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7
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Ptak M, Svane KL, Collings IE, Paraguassu W. Effect of Alkali and Trivalent Metal Ions on the High-Pressure Phase Transition of [C 2H 5NH 3]M I 0.5M III 0.5(HCOO) 3 (M I = Na, K and M III = Cr, Al) Heterometallic Perovskites. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:6337-6348. [PMID: 32952769 PMCID: PMC7497711 DOI: 10.1021/acs.jpcc.0c00372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/18/2020] [Indexed: 06/11/2023]
Abstract
We report the high-pressure behavior of two perovskite-like metal formate frameworks with the ethylammonium cation (EtAKCr and EtANaAl) and compare them to previously reported data for EtANaCr. High-pressure single-crystal X-ray diffraction and Raman data for EtAKCr show the occurrence of two high-pressure phase transitions observed at 0.75(16) and 2.4(2) GPa. The first phase transition involves strong compression and distortion of the KO6 subnetwork followed by rearrangement of the -CH2CH3 groups from the ethylammonium cations, while the second involves octahedral tilting to further reduce pore volume, accompanied by further configurational changes of the alkyl chains. Both transitions retain the ambient P21/n symmetry. We also correlate and discuss the influence of structural properties (distortion parameters, bulk modulus, tolerance factors, and compressibility) and parameters calculated by using density functional theory (vibrational entropy, site-projected phonon density of states, and hydrogen bonding energy) on the occurrence and properties of structural phase transitions observed in this class of metal formates.
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Affiliation(s)
- Maciej Ptak
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
| | - Katrine L. Svane
- Department
of Energy Conversion and Storage, Technical
University of Denmark, Kgs. Lyngby, Denmark
- Department
of Chemistry, University of Bath, Bath, U.K.
| | - Ines E. Collings
- European
Synchrotron Radiation Facility, Grenoble, France
- Empa
- Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
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8
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Yang Z, Cai G, Bull CL, Tucker MG, Dove MT, Friedrich A, Phillips AE. Hydrogen-bond-mediated structural variation of metal guanidinium formate hybrid perovskites under pressure. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2019; 377:20180227. [PMID: 31130096 PMCID: PMC6562345 DOI: 10.1098/rsta.2018.0227] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The hybrid perovskites are coordination frameworks with the same topology as the inorganic perovskites, but with properties driven by different chemistry, including host-framework hydrogen bonding. Like the inorganic perovskites, these materials exhibit many different phases, including structures with potentially exploitable functionality. However, their phase transformations under pressure are more complex and less well understood. We have studied the structures of manganese and cobalt guanidinium formate under pressure using single-crystal X-ray and powder neutron diffraction. Under pressure, these materials transform to a rhombohedral phase isostructural to cadmium guanidinium formate. This transformation accommodates the reduced cell volume while preserving the perovskite topology of the framework. Using density-functional theory calculations, we show that this behaviour is a consequence of the hydrogen-bonded network of guanidinium ions, which act as struts protecting the metal formate framework against compression within their plane. Our results demonstrate more generally that identifying suitable host-guest hydrogen-bonding geometries may provide a route to engineering hybrid perovskite phases with desirable crystal structures. This article is part of the theme issue 'Mineralomimesis: natural and synthetic frameworks in science and technology'.
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Affiliation(s)
- Zhengqiang Yang
- School of Physics and Astronomy, Queen Mary University of London, London E1 4NS, UK
| | - Guanqun Cai
- School of Physics and Astronomy, Queen Mary University of London, London E1 4NS, UK
| | - Craig L. Bull
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Matthew G. Tucker
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Martin T. Dove
- School of Physics and Astronomy, Queen Mary University of London, London E1 4NS, UK
| | - Alexandra Friedrich
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, Altenhöferallee 1, Frankfurt am Main 60438, Germany
| | - Anthony E. Phillips
- School of Physics and Astronomy, Queen Mary University of London, London E1 4NS, UK
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9
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Trzebiatowska M, Ptak M. The mechanism of phase transitions in azide perovskites probed by vibrational spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:184-191. [PMID: 30776720 DOI: 10.1016/j.saa.2019.02.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/06/2019] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
The temperature-dependent IR and Raman spectroscopy has been used to study the phase transitions in manganese-azide frameworks with either dimethylammonium (DMA+) or tetramethylammonium (TMA+) cations which adopt a perovskite-like crystal structure. The phase transition in DMA-analogue seems to be associated with cooperative tilting of MnN6 octahedra and order-disorder of hydrogen bonds while in TMA-analogue it is more complex and composed of several processes, including the motions of both manganese-azide framework and tetramethylammonium cations and their possible coupling. Our results are in agreement with the data received from crystallographic and dielectric measurements in the case of TMA-analogue and we have demonstrated the importance of order-disorder of hydrogen bonds in the case of DMA-analogue which previously has not been taken into account.
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Affiliation(s)
- M Trzebiatowska
- Institute of Low Temperature and Structure Research PAS, Okólna Str. 2, 50-422 Wrocław, Poland.
| | - M Ptak
- Institute of Low Temperature and Structure Research PAS, Okólna Str. 2, 50-422 Wrocław, Poland
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10
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Ptak M, Svane KL, Walsh A, Paraguassu W. Stability and flexibility of heterometallic formate perovskites with the dimethylammonium cation: pressure-induced phase transitions. Phys Chem Chem Phys 2019; 21:4200-4208. [DOI: 10.1039/c8cp07131d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We report the high-pressure Raman studies and DFT calculations of DMANaCr and DMAKCr perovskite formates.
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Affiliation(s)
- Maciej Ptak
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- Wrocław
- Poland
| | | | - Aron Walsh
- Department of Materials, Imperial College London
- London
- UK
- Department of Materials Science and Engineering, Yonsei University
- Seoul
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11
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Mączka M, Collings IE, Leite FF, Paraguassu W. Raman and single-crystal X-ray diffraction evidence of pressure-induced phase transitions in a perovskite-like framework of [(C3H7)4N] [Mn(N(CN)2)3]. Dalton Trans 2019; 48:9072-9078. [DOI: 10.1039/c9dt01648a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The [TPrA][Mn(dca)3] perovskite shows highly anisotropic compression and the presence of three pressure-induced phase transitions near 0.4, 3 and 5 GPa into lower symmetry phases.
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Affiliation(s)
- Mirosław Mączka
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
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12
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Sobczak S, Chitnis A, Andrzejewski M, Mączka M, Gohil S, Garg N, Katrusiak A. Framework and coordination strain in two isostructural hybrid metal–organic perovskites. CrystEngComm 2018. [DOI: 10.1039/c8ce00884a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Compression of DmaNiFor3 and DmaCoFor3 has been investigated by single-crystal X-ray diffraction and Raman spectroscopy.
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Affiliation(s)
- Szymon Sobczak
- Faculty of Chemistry
- Adam Mickiewicz University
- 61-614 Poznań
- Poland
| | - Abhishek Chitnis
- High Pressure Synchrotron Radiation Physics Division
- Bhabha Atomic Research Centre
- Mumbai
- India
| | | | - Mirosław Mączka
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- Poland
| | - Smita Gohil
- Dept. of Condensed Matter Physics and Materials Science
- Tata Institute of Fundamental Research
- Mumbai
- India
| | - Nandini Garg
- High Pressure Synchrotron Radiation Physics Division
- Bhabha Atomic Research Centre
- Mumbai
- India
- Homi Bhabha National Institute
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