1
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Kurzydłowski D, Kobyakov S, Mazej Z, Pillai SB, Chakraborty B, Jha PK. Unexpected persistence of cis-bridged chains in compressed AuF 3. Chem Commun (Camb) 2020; 56:4902-4905. [PMID: 32239024 DOI: 10.1039/d0cc01374a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Raman scattering measurements indicate that cis-bridged chains are retained in AuF3 even at a compression of 45 GPa - in contrast to meta-GGA calculations suggesting that structures with such motifs are thermodynamically unstable above 4 GPa. This metastability implies that novel gold fluorides (e.g. AuF2) might be attainable at lower pressures than previously proposed.
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Affiliation(s)
- Dominik Kurzydłowski
- Faculty of Mathematics and Natural Sciences, Cardinal Stefan Wyszyński University, ul. Wóycickiego 1/3, Warsaw 01-938, Poland. and Centre of New Technologies, University of Warsaw, ul. Banacha 2c, Warsaw 02-097, Poland
| | - Serhiy Kobyakov
- Faculty of Mathematics and Natural Sciences, Cardinal Stefan Wyszyński University, ul. Wóycickiego 1/3, Warsaw 01-938, Poland.
| | - Zoran Mazej
- Department of Inorganic Chemistry and Technology, JoŽef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
| | - Sharad Babu Pillai
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390002, India
| | - Brahmananda Chakraborty
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Prafulla K Jha
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390002, India
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2
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Eklund K, Kuklin MS, Kraus F, Karttunen AJ. Evolutionary Algorithm-based Crystal Structure Prediction for Gold(I) Fluoride. Chemphyschem 2020; 21:802-808. [PMID: 31919990 DOI: 10.1002/cphc.201901070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/02/2020] [Indexed: 11/06/2022]
Abstract
Solid gold(I) fluoride remains as an unsynthesized and uncharacterized compound. We have performed a search for potential gold(I) fluoride crystal structures using USPEX evolutionary algorithm and dispersion-corrected hybrid density functional methods. Over 4000 AuF crystal structures have been investigated. Behavior of the AuF crystal structures under pressure was studied up to 25 GPa, and we also evaluated the thermodynamic stability of the hypothetical AuF crystal structures with respect to AuF3 , AuF5 , and Au3 F8 . Mixed-valence compound Au3 [AuF4 ] with Au atoms in various formal oxidation states emerged as the thermodynamically most stable AuF species.
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Affiliation(s)
- Kim Eklund
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland
| | - Mikhail S Kuklin
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland
| | - Florian Kraus
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany
| | - Antti J Karttunen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland
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3
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Zhang J, Feng X, Liu G, Redfern SAT, Liu H. Computational prediction of a +4 oxidation state in Au via compressed AuO 2 compound. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:015402. [PMID: 31505475 DOI: 10.1088/1361-648x/ab4325] [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
Much effort has been devoted to the investigation of the physical and chemical properties of the Au-O system over a range of pressures, owing to the considerable importance of these materials in fundamental and practical applications. To date, however, only Au1+, Au2+, Au3+, and Au5+ oxidation states have been identified in the Au-O system, but tetravalent Au4+ has not been found. Here, we report the results of structure prediction for the Au-O system at high pressure via the effective structure prediction methodology within a first-principles electronic structure framework. We have uncovered an intriguing structure with AuO2 composition and tetravalent Au, stable at high pressures. This phase shows an electronic transition from a metal to a semiconducting phase as a function of pressure. The present results provide fundamental understanding of the structural and physicochemical properties of compressed Au-O compounds.
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Affiliation(s)
- Jurong Zhang
- State Key Laboratory for Superhard Materials and Innovation Center of Computational Physics Methods and Software, College of Physics, Jilin University, Changchun 130012, People's Republic of China
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4
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Quest for Compounds at the Verge of Charge Transfer Instabilities: The Case of Silver(II) Chloride †. CRYSTALS 2019. [DOI: 10.3390/cryst9080423] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Electron-transfer processes constitute one important limiting factor governing stability of solids. One classical case is that of CuI2, which has never been prepared at ambient pressure conditions due to feasibility of charge transfer between metal and nonmetal (CuI2 → CuI + ½ I2). Sometimes, redox instabilities involve two metal centers, e.g., AgO is not an oxide of divalent silver but rather silver(I) dioxoargentate(III), Ag(I)[Ag(III)O2]. Here, we look at the particularly interesting case of a hypothetical AgCl2 where both types of redox instabilities operate simultaneously. Since standard redox potential of the Ag(II)/Ag(I) redox pair reaches some 2 V versus Normal Hydrogen Electrode (NHE), it might be expected that Ag(II) would oxidize Cl− anion with great ease (standard redox potential of the ½ Cl2/Cl− pair is + 1.36 V versus Normal Hydrogen Electrode). However, ionic Ag(II)Cl2 benefits from long-distance electrostatic stabilization to a much larger degree than Ag(I)Cl + ½ Cl2, which affects relative stability. Moreover, Ag(II) may disproportionate in its chloride, just like it does in an oxide; this is what AuCl2 does, its formula corresponding in fact to Au(I)[Au(III)Cl4]. Formation of polychloride substructure, as for organic derivatives of Cl3− anion, is yet another possibility. All that creates a very complicated potential energy surface with a few chemically distinct minima i.e., diverse polymorphic forms present. Here, results of our theoretical study for AgCl2 will be presented including outcome of evolutionary algorithm structure prediction method, and the chemical identity of the most stable form will be uncovered together with its presumed magnetic properties. Contrary to previous rough estimates suggesting substantial instability of AgCl2, we find that AgCl2 is only slightly metastable (by 52 meV per formula unit) with respect to the known AgCl and ½ Cl2, stable with respect to elements, and simultaneously dynamically (i.e., phonon) stable. Thus, our results point out to conceivable existence of AgCl2 which should be targeted via non-equilibrium approaches.
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5
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Liu G, Feng X, Wang L, Redfern SAT, Yong X, Gao G, Liu H. Theoretical investigation of the valence states in Au via the Au-F compounds under high pressure. Phys Chem Chem Phys 2019; 21:17621-17627. [PMID: 31347635 DOI: 10.1039/c9cp02409c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In addition to the known Au3+ and Au5+, it has recently been shown that Au is likely to possess unusual valence states in compressed Au-F compounds. However, our simulations reveal that polymeric ground-state AuF4 shows an unexpected 6-fold coordination rather than a 4-fold one, indicating that more complete comprehending on the anomalous Au4+ is highly required. To fully understand the nature and origin of anomalous valence states in Au, we have extensively investigated the ground-state structures of Au-F compounds at high pressures using quantum mechanical computational methods. As a consequence, we identify several previously unreported (stable) AuF2, AuF3 and AuF4 structures. Our results extend the known polymorphism of AuFn compounds and offer a fundamental understanding of the origin of unusual valence states in Au that prevail at high pressure.
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Affiliation(s)
- Guangtao Liu
- Innovation Center for Computational Physics Methods and Software & State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
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6
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Wan W, Yin J, Wu Y, Zheng X, Yang W, Wang H, Zhou J, Chen J, Wu Z, Li X, Kang J. Polarization-Controllable Plasmonic Enhancement on the Optical Response of Two-Dimensional GaSe Layers. ACS APPLIED MATERIALS & INTERFACES 2019; 11:19631-19637. [PMID: 31038912 DOI: 10.1021/acsami.9b03880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Resonant plasmonic coupling has been considered as a promising strategy to enhance the optical response and manipulate the polarization of two-dimensional (2D) layer materials toward the practical applications. Here, a hybrid structure with periodic Ag nanoprism arrays was designed and fabricated on 2D GaSe layers to enhance these optical properties. By using the optimized hybrid structure with well-matched resonance, significant enhanced Raman scattering and band edge emission were successfully realized, and it is also interestingly found that the higher enhancement would be achieved while decreasing the thickness of GaSe layers. Theoretical simulation indicated that the strongly enhanced local field and the modified charge densities are the main reasons. By further introducing the patterned gratings on the plasmonic hybrid structure, selective excitation with controllable polarization was readily realized, besides the strongly enhanced photoluminescence intensity. This work provides a strategy for the plasmonic engineering of polarization controllable 2D optoelectronic devices.
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Affiliation(s)
| | | | | | | | - Weihuang Yang
- Key Laboratory of RF Circuits and System of Ministry of Education , Hangzhou Dianzi University , Hangzhou 310018 , P. R. China
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7
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Zurek E, Bi T. High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective. J Chem Phys 2019; 150:050901. [DOI: 10.1063/1.5079225] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Eva Zurek
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
| | - Tiange Bi
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
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8
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Rahm M, Zeng T, Hoffmann R. Electronegativity Seen as the Ground-State Average Valence Electron Binding Energy. J Am Chem Soc 2018; 141:342-351. [PMID: 30499303 DOI: 10.1021/jacs.8b10246] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We introduce a new electronegativity scale for atoms, based consistently on ground-state energies of valence electrons. The scale is closely related to (yet different from) L. C. Allen's, which is based on configuration energies. Using a combination of literature experimental values for ground-state energies and ab initio-calculated energies where experimental data are missing, we are able to provide electronegativities for elements 1-96. The values are slightly smaller than Allen's original scale, but correlate well with Allen's and others. Outliers in agreement with other scales are oxygen and fluorine, now somewhat less electronegative, but in better agreement with their chemistry with the noble gas elements. Group 11 and 12 electronegativities emerge as high, although Au less so than in other scales. Our scale also gives relatively high electronegativities for Mn, Co, Ni, Zn, Tc, Cd, Hg (affected by choice of valence state), and Gd. The new electronegativities provide hints for new alloy/compound design, and a framework is in place to analyze those energy changes in reactions in which electronegativity changes may not be controlling.
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Affiliation(s)
- Martin Rahm
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , SE-412 96 , Gothenburg , Sweden
| | - Tao Zeng
- Department of Chemistry , Carleton University , Ottawa , Ontario K1S 5B6 , Canada
| | - Roald Hoffmann
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
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9
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Tang M, Zhang Y, Li S, Wu X, Jia Y, Yang G. Mixed-valence Compounds: AuO2
and AuS. Chemphyschem 2018; 19:2989-2994. [DOI: 10.1002/cphc.201800715] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Indexed: 01/31/2023]
Affiliation(s)
- Meng Tang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education; National Demonstration Center for Experimental Physics Education; Northeast Normal University; Changchun 130024 China
| | - Yanmei Zhang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education; National Demonstration Center for Experimental Physics Education; Northeast Normal University; Changchun 130024 China
| | - Siya Li
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education; National Demonstration Center for Experimental Physics Education; Northeast Normal University; Changchun 130024 China
| | - Xi Wu
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education; National Demonstration Center for Experimental Physics Education; Northeast Normal University; Changchun 130024 China
| | - Yan Jia
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education; National Demonstration Center for Experimental Physics Education; Northeast Normal University; Changchun 130024 China
| | - Guochun Yang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education; National Demonstration Center for Experimental Physics Education; Northeast Normal University; Changchun 130024 China
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10
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Kurzydłowski D, Derzsi M, Barone P, Grzelak A, Struzhkin V, Lorenzana J, Grochala W. Dramatic enhancement of spin–spin coupling and quenching of magnetic dimensionality in compressed silver difluoride. Chem Commun (Camb) 2018; 54:10252-10255. [DOI: 10.1039/c8cc05002c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The high-pressure HP2 form of AgF2 features Ag2F73− units that are theoretically predicted to host extremely strong antiferromagnetic interactions, surpassing those seen in copper(ii) oxides.
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Affiliation(s)
- Dominik Kurzydłowski
- Center of New Technologies
- University of Warsaw
- 02-097 Warsaw
- Poland
- Faculty of Mathematics and Natural Sciences
| | - Mariana Derzsi
- Center of New Technologies
- University of Warsaw
- 02-097 Warsaw
- Poland
- Advanced Technologies Research Institute
| | | | - Adam Grzelak
- Center of New Technologies
- University of Warsaw
- 02-097 Warsaw
- Poland
- Faculty of Chemistry
| | - Viktor Struzhkin
- Geophysical Laboratory
- Carnegie Institution of Washington
- Washington
- USA
| | - José Lorenzana
- ISC-CNR
- Dipartimento di Fisica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
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11
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Shen K, Jia C, Cao B, Xu H, Wang J, Zhang L, Kim K, Wang W. Comparison of catalytic activity between Au(110) and Au(111) for the electro-oxidation of methanol and formic acid: Experiment and density functional theory calculation. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.10.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Grochala W. The generalized maximum hardness principle revisited and applied to solids (Part 2). Phys Chem Chem Phys 2017; 19:30984-31006. [PMID: 29120466 DOI: 10.1039/c7cp05027e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Building on Part 1 devoted to atoms and molecules (PCCP, in press 2017), we now focus on the crystal structure and electronic properties of solids as viewed from the Maximum Hardness Principle (MHP), first formulated by Pearson in 1987. The focus is on cases where nuclear potential acting on electrons does not remain constant and where substantial modifications of the nuclear geometry take place (Generalized MHP, GMHP). We present an overview of important manifestations of the (G)MHP for solids such as (i) a tendency of metals and doped-semiconductors to undergo superconducting transition at low temperatures, (ii) propensity of many types of alloys to develop a band gap or a pseudo-gap, (iii) preference for preserving the noble gas (octet, doublet) configuration of main block element ions in the solid state, (iv) preference of Jahn-Teller systems for band-gap-opening vibronic-coupling-related lattice distortions, (v) pressure phenomena leading to localization of the electronic density, (vi) tendency to annihilate the null band gap via phase separation (while preserving the nominal chemical composition), (vii) absence of a large number of families of high-TC superconductors, (viii) resistance of most stable systems to chemical doping, etc. GMHP turns out to be an important qualitative guide in studies of solid state polymorphism and electronic phenomena. Exceptions from (G)MHP are discussed, and a more restrictive formulation of the principle is proposed.
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Affiliation(s)
- Wojciech Grochala
- Centre for New Technologies, The University of Warsaw, Zwirki i Wigury 93, 02089 Warsaw, Poland.
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13
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Heinze K. Die Suche nach einkernigem Gold(II) und seine mögliche Rolle in Photokatalyse und Medizinalchemie. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708349] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Katja Heinze
- Institut für Anorganische Chemie und Analytische Chemie; Johannes Gutenberg Universität Mainz; Duesbergweg 10-14 55128 Mainz Deutschland
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14
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Heinze K. The Quest for Mononuclear Gold(II) and Its Potential Role in Photocatalysis and Drug Action. Angew Chem Int Ed Engl 2017; 56:16126-16134. [DOI: 10.1002/anie.201708349] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Indexed: 01/10/2023]
Affiliation(s)
- Katja Heinze
- Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
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15
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Jerabek P, von der Esch B, Schmidbaur H, Schwerdtfeger P. Influence of Relativistic Effects on Bonding Modes in M(II) Dinuclear Complexes (M = Au, Ag, and Cu). Inorg Chem 2017; 56:14624-14631. [PMID: 29135228 DOI: 10.1021/acs.inorgchem.7b02434] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The stability and bonding in dinuclear group 11 metal complexes (M = Au, Ag, and Cu) in their +2 oxidation state has been investigated by quantum chemical methods. Two model complexes were selected as representatives of different bonding situations in the dinuclear M(II) complexes, a direct metal-metal bond between two ligand stabilized monomers and ligand-mediated bridged dimer system, making them interesting for a direct comparison and to study the influence of relativistic effects. Relativity substantially stabilizes the direct metal-metal bonded system obtaining the sequence in M-M bond stability Au > Ag > Cu. In the ligand-bridged structure, an asymmetric bonding situation is obtained for gold, resulting in two stronger/covalent and two weaker/ionic bonds per gold atom. Here we observe the opposite trend in stability Cu > Ag > Au. Our analysis nicely corroborates with what is known from experimental observation.
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Affiliation(s)
- Paul Jerabek
- The New Zealand Institute for Advanced Study, Massey University , Private Bag 102904, 0632 Auckland, New Zealand
| | - Beatriz von der Esch
- The New Zealand Institute for Advanced Study, Massey University , Private Bag 102904, 0632 Auckland, New Zealand
| | - Hubert Schmidbaur
- Department Chemie, Technische Universität München , 85747 Garching, Germany
| | - Peter Schwerdtfeger
- The New Zealand Institute for Advanced Study, Massey University , Private Bag 102904, 0632 Auckland, New Zealand
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16
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Rahm M, Hoffmann R, Ashcroft NW. Ternary Gold Hydrides: Routes to Stable and Potentially Superconducting Compounds. J Am Chem Soc 2017. [DOI: 10.1021/jacs.7b04456] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martin Rahm
- Department of Chemistry and Chemical Biology and ‡Laboratory of Atomic
and Solid State
Physics, Cornell University Ithaca, New York 14853, United States
| | - Roald Hoffmann
- Department of Chemistry and Chemical Biology and ‡Laboratory of Atomic
and Solid State
Physics, Cornell University Ithaca, New York 14853, United States
| | - N. W. Ashcroft
- Department of Chemistry and Chemical Biology and ‡Laboratory of Atomic
and Solid State
Physics, Cornell University Ithaca, New York 14853, United States
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17
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Grzelak A, Gawraczyński J, Jaroń T, Somayazulu M, Derzsi M, Struzhkin V, Grochala W. Persistence of Mixed and Non-intermediate Valence in the High-Pressure Structure of Silver(I,III) Oxide, AgO: A Combined Raman, X-ray Diffraction (XRD), and Density Functional Theory (DFT) Study. Inorg Chem 2017; 56:5804-5812. [DOI: 10.1021/acs.inorgchem.7b00405] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adam Grzelak
- Faculty of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland
- Center of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
| | - Jakub Gawraczyński
- Faculty of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland
- Center of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
| | - Tomasz Jaroń
- Center of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, D.C. 20015, United States
| | - Maddury Somayazulu
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, D.C. 20015, United States
| | - Mariana Derzsi
- Center of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
| | - Viktor Struzhkin
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, D.C. 20015, United States
| | - Wojciech Grochala
- Center of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
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18
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López-Moreno S, Rodríguez-Hernández P, Muñoz A, Errandonea D. First-Principles Study of InVO4 under Pressure: Phase Transitions from CrVO4- to AgMnO4-Type Structure. Inorg Chem 2017; 56:2697-2711. [DOI: 10.1021/acs.inorgchem.6b02867] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sinhué López-Moreno
- CONACYT-Centro de Investigación en Corrosión, Universidad Autónoma de Campeche, Av. Héroe de Nacozari 480, Campeche, Campeche 24029, México
| | - Plácida Rodríguez-Hernández
- MALTA Consolider
Team, Departamento de Física, Instituto de Materiales y Nanotecnología,
and Malta Consolider Team, Universidad de La Laguna, La Laguna, 38205 Tenerife, Spain
| | - Alfonso Muñoz
- MALTA Consolider
Team, Departamento de Física, Instituto de Materiales y Nanotecnología,
and Malta Consolider Team, Universidad de La Laguna, La Laguna, 38205 Tenerife, Spain
| | - Daniel Errandonea
- MALTA Consolider Team, Departamento de Física Aplicada-ICMUV, Universitad de Valencia, Edificio de Investigación, c/Dr. Moliner
50, Burjassot, 46100 Valencia, Spain
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19
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Derzsi M, Grochala W. Comment on "Pressure-induced structural and valence transition in AgO" by C. Hou, J. Botana, X. Zhang, X. Wang and M. Miao, Phys. Chem. Chem. Phys., 2016, 18, 15322. Phys Chem Chem Phys 2016; 18:31973-31974. [PMID: 27845453 DOI: 10.1039/c6cp04144b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The recent article by Hou et al. has focused on a theoretical study of mixed valence compound AgO in order to elucidate the nature of the electronic structure of this system as a function of external pressure. The authors claim that '…the effects of pressure on the Ag valence state are not investigated yet.' This statement is incorrect in view of the theoretical study published in 2015 by Włodarska et al., which answers most of the questions posed by these authors, including the key one: '…does the Ag cation exhibit similar behaviour to the Au cation in M2Au2X6halides, experiencing mixed-valence to single-valence transition under pressure? If so, what is the mechanism?'.
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Affiliation(s)
- Mariana Derzsi
- Center of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02089 Warsaw, Poland.
| | - Wojciech Grochala
- Center of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02089 Warsaw, Poland.
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