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Makhaneva AY, Zakharova EY, Nesterenko SN, Lyssenko KA, Kuznetsov AN. Merging the AuCu 3- and BaAl 4-based structure motifs: flux-assisted synthesis, crystal, and electronic structure of Ca 2Pt 7XP 4-δ phosphide platinides (X = Al, Ti, and Zn). Dalton Trans 2022; 51:18583-18592. [PMID: 36444887 DOI: 10.1039/d2dt03367d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Three quaternary phosphide platinides, Ca2Pt7AlP3.00(4), Ca2Pt7TiP3.24(4), and Ca2Pt7ZnP2.78(2), were synthesized by a high-temperature technique using lead as a flux. According to the single-crystal diffraction data, they are isotypic and crystallize in the tetragonal space group I4/mmm with Z = 2 (Ca2Pt7AlP3.00(4): a = 3.9893(6) Å, c = 26.832(5) Å; Ca2Pt7TiP3.24(4): a = 3.99610(10) Å, c = 26.9074(17) Å; Ca2Pt7ZnP2.78(2): a = 4.0020(2) Å, c = 26.5549(17) Å) and thus represent first europium-free compounds of the Eu2Pt7AlP2.95 structure type. Their structures can be described as an intergrowth of the AuCu3- and CaBe2Ge2-type blocks. DFT calculations predict metallic conductivity and non-magnetic state for all three compounds. Bonding analysis based on the Bader charge distribution and ELF topology reveals a combination of localized covalent and ionic interactions in the CaBe2Ge2-type fragments and complex pattern of pairwise, multi-center, and ionic interactions in the AuCu3-type fragments that closely reproduces bonding in the parent Pt3X (X = Al, Ti, Zn) binary intermetallics.
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Affiliation(s)
- Anastasiya Yu Makhaneva
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russian Federation.
| | - Elena Yu Zakharova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russian Federation.
| | - Sergey N Nesterenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russian Federation.
| | - Konstantin A Lyssenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russian Federation. .,National Research University Higher School of Economics, Miasnitskaya Str. 20, 101000 Moscow, Russian Federation
| | - Alexey N Kuznetsov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russian Federation.
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Khoury JF, Rettie AJE, Robredo I, Krogstad MJ, Malliakas CD, Bergara A, Vergniory MG, Osborn R, Rosenkranz S, Chung DY, Kanatzidis MG. The Subchalcogenides Ir 2In 8Q (Q = S, Se, Te): Dirac Semimetal Candidates with Re-entrant Structural Modulation. J Am Chem Soc 2020; 142:6312-6323. [PMID: 32160464 DOI: 10.1021/jacs.0c00809] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Subchalcogenides are uncommon compounds where the metal atoms are in unusually low formal oxidation states. They bridge the gap between intermetallics and semiconductors and can have unexpected structures and properties because of the exotic nature of their chemical bonding as they contain both metal-metal and metal-main group (e.g., halide, chalcogenide) interactions. Finding new members of this class of materials presents synthetic challenges as attempts to make them often result in phase separation into binary compounds. We overcome this difficulty by utilizing indium as a metal flux to synthesize large (millimeter scale) single crystals of novel subchalcogenide materials. Herein, we report two new compounds Ir2In8Q (Q = Se, Te) and compare their structural and electrical properties to the previously reported Ir2In8S analogue. Ir2In8Se and Ir2In8Te crystallize in the P42/mnm space group and are isostructural to Ir2In8S, but also have commensurately modulated (with q vectors q = 1/6a* + 1/6b* and q = 1/10a* + 1/10b* for Ir2In8Se and Ir2In8Te, respectively) low-temperature phase transitions, where the chalcogenide anions in the channels experience a distortion in the form of In-Q bond alternation along the ab plane. Both compounds display re-entrant structural behavior, where the supercells appear on cooling but revert to the original subcell below 100 K, suggesting competing structural and electronic interactions dictate the overall structure. Notably, these materials are topological semimetal candidates with symmetry-protected Dirac crossings near the Fermi level and exhibit high electron mobilities (∼1500 cm2 V-1 s-1 at 1.8 K) and moderate carrier concentrations (∼1020 cm-3) from charge transport measurements. This work highlights metal flux as a synthetic route to high quality single crystals of novel intermetallic subchalcogenides with Dirac semimetal behavior.
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Affiliation(s)
- Jason F Khoury
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alexander J E Rettie
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London WC1E 7JE, United Kingdom
| | - Iñigo Robredo
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia-San Sebastian 20018, Spain.,Condensed Matter Physics Department, University of the Basque Country UPV/EHU, Bilbao 48080, Spain
| | - Matthew J Krogstad
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Christos D Malliakas
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Aitor Bergara
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia-San Sebastian 20018, Spain.,Condensed Matter Physics Department, University of the Basque Country UPV/EHU, Bilbao 48080, Spain.,Centro de Física de Materiales, Centro Mixto CSIC-UPV/EHU, Donostia 20018, Spain
| | - Maia G Vergniory
- Condensed Matter Physics Department, University of the Basque Country UPV/EHU, Bilbao 48080, Spain.,Ikerbasque, Basque Foundation for Science, Bilbao E-48011, Spain
| | - Raymond Osborn
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Stephan Rosenkranz
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Duck Young Chung
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Mercouri G Kanatzidis
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.,Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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Zakharova EY, Kazakov SM, Götze A, Kohlmann H, Kuznetsov AN. Ternary palladium-indium-phosphorus and platinum-indium-phosphorus compounds based on the Cu3Au-type: Structure, bonding, and properties. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.06.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kuznetsov AN, Serov AA. Ni
5.73
InSe
2
– a Metal‐Rich Selenide Based on the Cu
3
Au‐Type 2D Heterometallic Framework: Synthesis, Structure, and Bonding. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501197] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alexey N. Kuznetsov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1‐3, GSP‐1, 119991 Moscow, Russian Federation, http://www.inorg.chem.msu.ru/sis/r453/index.html
- N. S. Kurnakov Institute of General and Inorganic Chemistry, RAS Leninsky pr. 31, GSP‐1, 119991 Moscow, Russian Federation
| | - Alexey A. Serov
- Center for Emerging Energy Technologies, University of New Mexico, Albuquerque, NM 87131‐1070, USA
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