1
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Tkachenko NV, Tkachenko AA, Nebgen B, Tretiak S, Boldyrev AI. Neural network atomistic potentials for global energy minima search in carbon clusters. Phys Chem Chem Phys 2023; 25:21173-21182. [PMID: 37490276 DOI: 10.1039/d3cp02317f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The global energy optimization problem is an acute and important problem in chemistry. It is crucial to know the geometry of the lowest energy isomer (global minimum, GM) of a given compound for the evaluation of its chemical and physical properties. This problem is especially relevant for atomic clusters. Due to the exponential growth of the number of local minima geometries with the increase of the number of atoms in the cluster, it is important to find a computationally efficient and reliable method to navigate the energy landscape and locate a true global minima structure. Newly developed neural network (NN) atomistic potentials offer a numerically efficient and relatively accurate approach for molecular structure optimization. An important question that needs to be answered is "Can NN potentials, trained on a given set, represent the potential energy surface (PES) of a neighboring domain?". In this work, we tested the applicability of ANI-1ccx and ANI-nr NN atomistic potentials for the global minima optimization of carbon clusters Cn (n = 3-10). We showed that with the introduction of the cluster connectivity restriction and consequent DFT or ab initio calculations, ANI-1ccx and ANI-nr can be considered as robust PES pre-samplers that can capture the GM structure even for large clusters such as C20.
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Affiliation(s)
- Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA.
| | | | - Benjamin Nebgen
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Sergei Tretiak
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA.
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2
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Rublev P, Tkachenko NV, Dub PA, Boldyrev AI. On the existence of CO 32- microsolvated clusters: a theoretical study. Phys Chem Chem Phys 2023; 25:14046-14055. [PMID: 37161655 DOI: 10.1039/d3cp00955f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Microsolvated clusters of multiply charged anions play a crucial role in atmospheric chemistry and some of them were previously registered experimentally. At the same time, there are no experimental observations of [CO3·(H2O)n]2-. The reasons for this may be related to the thermodynamical or kinetical instability of microsolvated CO32- toward autoionization or autoprotonation processes. In this study we theoretically investigate the potential stability of the [CO3·(H2O)n]2- microsolvated clusters from both perspectives - thermodynamic and kinetic - and we claim they are stable toward autoionization and kinetically semi-stable toward autoprotonation. In addition, the behaviour of CO32- anions in bulk water solvent was analysed to highlight important precautions for synthetic purposes.
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Affiliation(s)
- Pavel Rublev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, USA.
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, USA.
| | - Pavel A Dub
- Schrödinger Inc., San Diego, California 92121, USA
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, USA.
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3
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Rublev P, Tkachenko NV, Boldyrev AI. Overlapping electron density and the global delocalization of π-aromatic fragments as the reason of conductivity of the biphenylene network. J Comput Chem 2023; 44:168-178. [PMID: 35385143 DOI: 10.1002/jcc.26854] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 03/09/2022] [Accepted: 03/16/2022] [Indexed: 12/31/2022]
Abstract
Recently fabricated 2D biphenylene network is an astonishing solid-state material, which possesses unique metal-like conductive properties. At the same time, two-dimensional boron nitride network (2D-BN)-an isoelectronic and structural analogue of biphenylene network, is an insulator with a wide direct bandgap. This study investigates the relationship between the electronic properties and chemical bonding patterns for these species. It is shown that the insulating 2D-BN network possesses a strong localization of electron density on the nitrogen atoms. In turn, for a carbon-containing sheet, we found a highly delocalized electron density and an appreciable overlap of pz orbitals of neighboring C6 rings, which might be a reason for the conductive properties of the material.
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Affiliation(s)
- Pavel Rublev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah, USA
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah, USA
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah, USA
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4
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Tkachenko NV, Rublev P, Dub PA. The Source of Proton in the Noyori–Ikariya Catalytic Cycle. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nikolay V. Tkachenko
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico87545, United States
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah84322, United States
| | - Pavel Rublev
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico87545, United States
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah84322, United States
| | - Pavel A. Dub
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico87545, United States
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5
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Yokelson D, Tkachenko NV, Robey R, Li YW, Dub PA. Performance Analysis of CP2K Code for Ab Initio Molecular Dynamics on CPUs and GPUs. J Chem Inf Model 2022; 62:2378-2386. [PMID: 35451847 DOI: 10.1021/acs.jcim.1c01538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a realistic molecular catalyst system, we conduct scaling studies of ab initio molecular dynamics simulations using the popular CP2K code on both Intel Xeon CPU and NVIDIA V100 GPU architectures. Additional performance improvements were gained by finding more optimal process placement and affinity settings. Statistical methods were employed to understand performance changes in spite of the variability in runtime for each molecular dynamics timestep. Ideal conditions for CPU runs were found when running at least four MPI ranks per node, bound evenly across each socket. This study also showed that fully utilizing processing cores, with one OpenMP thread per core, performed better than when reserving cores for the system. The CPU-only simulations scaled at 70% or more of the ideal scaling up to 10 compute nodes, after which the returns began to diminish more quickly. Simulations on a single 40-core node with two NVIDIA V100 GPUs for acceleration achieved over 3.7× speedup compared to the fastest single 36-core node CPU-only version. These same GPU runs showed a 13% speedup over the fastest time achieved across five CPU-only nodes.
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Affiliation(s)
- Dewi Yokelson
- Applied Computer Science Division (CCS-7), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Nikolay V Tkachenko
- Chemistry Division (C-IIAC), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Robert Robey
- Computational Physics Division (XCP-2), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ying Wai Li
- Applied Computer Science Division (CCS-7), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Pavel A Dub
- Chemistry Division (C-IIAC), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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6
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Xu HL, Tkachenko NV, Szczepanik DW, Popov IA, Muñoz-Castro A, Boldyrev AI, Sun ZM. Symmetry collapse due to the presence of multiple local aromaticity in Ge 244. Nat Commun 2022; 13:2149. [PMID: 35444180 PMCID: PMC9021308 DOI: 10.1038/s41467-022-29626-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 03/15/2022] [Indexed: 11/09/2022] Open
Abstract
Understanding the structural changes taking place during the assembly of single atoms leading to the formation of atomic clusters and bulk materials remains challenging. The isolation and theoretical characterization of medium-sized clusters can shed light on the processes that occur during the transition to a solid-state structure. In this work, we synthesize and isolate a continuous 24-atom cluster Ge244−, which is characterized by X-ray diffraction analysis and Energy-dispersive X-ray spectroscopy, showing an elongated structural characteristic. Theoretical analysis reveals that electron delocalization plays a vital role in the formation and stabilization of the prolate cluster. In contrast with carbon atoms, 4 s orbitals of Ge-atoms do not easily hybridize with 4p orbitals and s-type lone-pairs can be localized with high occupancy. Thus, there are not enough electrons to form a stable symmetrical fullerene-like structure such as C24 fullerene. Three aromatic units with two [Ge9] and one [Ge6] species, connected by classical 2c-2e Ge-Ge σ-bonds, are aligned together forming three independent shielding cones and eventually causing a collapse of the global symmetry of the Ge244− cluster. Gaining insight on the structural transformations from atomic clusters to bulk materials is challenging. Here the authors synthesize a continuous cluster of germanium Ge244−, which can be viewed as two terminal Ge9 units bridged via a Ge6 central fragment, and characterize it by several techniques including X-ray diffraction; theoretical analysis indicates the presence of three aligned independent aromatic fragments.
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Affiliation(s)
- Hong-Lei Xu
- State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab of Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, China
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, USA
| | - Dariusz W Szczepanik
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, Kraków, Poland
| | - Ivan A Popov
- Department of Chemistry, The University of Akron, Akron, OH, USA
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autonoma de Chile, El Llano Subercaseaux, Santiago, Chile
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, USA.
| | - Zhong-Ming Sun
- State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab of Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, China.
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7
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Tkachenko NV, Rublev P, Boldyrev AI, Lehn JM. Superalkali Coated Rydberg Molecules. Front Chem 2022; 10:880804. [PMID: 35494656 PMCID: PMC9043523 DOI: 10.3389/fchem.2022.880804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
A series of complexes of Na, K, NH4, and H3O with [bpy.bpy.bpy]cryptand, [2.2.2]cryptand, and spherical cryptand were investigated via DFT and ab initio methods. We found that by coating Rydberg molecules with the “organic skin” one could further decrease their ionization potential energy, reaching the values of ∼1.5 eV and a new low record of 1.3 eV. The neutral cryptand complexes in this sense possess a weakly bounded electron and may be considered as very strong reducing agents. Moreover, the presence of an organic cage increases the thermodynamic stability of Rydberg molecules making them stable toward the proton detachment.
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Affiliation(s)
- Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, United States
| | - Pavel Rublev
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, United States
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, United States
- *Correspondence: Alexander I. Boldyrev,
| | - Jean-Marie Lehn
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d’Ingénierie, Supramoléculaires Université de Strasbourg, Strasbourg, France
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8
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Tkachenko NV, Chen WX, Morgan HWT, Muñoz-castro A, Boldyrev A, Sun ZM. Sn 368‒: A 2.7 nm Naked Aromatic Tin Rod. Chem Commun (Camb) 2022; 58:6223-6226. [DOI: 10.1039/d2cc01745h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we synthesize naked tin cluster anion Sn368‒, representing the first example of pure Sn nanowire assembled through oxidative coupling reactions of a super atomic cluster Sn94-. Theoretical...
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9
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Rublev P, Tkachenko NV, Pozdeev A, Boldyrev A. Tinning the Carbon: Hydrostannanes Strike Back. Dalton Trans 2022; 52:29-36. [DOI: 10.1039/d2dt03545f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Carbon possesses an important ability to be in a valence of IV, which is essential to all organic chemistry and carbon-based life. In turn, Tin is usually observed in the...
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10
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Tkachenko NV, Muñoz-Castro A, Boldyrev AI. Occurrence of Double Bond in π-Aromatic Rings: An Easy Way to Design Doubly Aromatic Carbon-Metal Structures. Molecules 2021; 26:molecules26237232. [PMID: 34885812 PMCID: PMC8659221 DOI: 10.3390/molecules26237232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 11/24/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022] Open
Abstract
A chemical bonding of several metallabenzenes and metallabenzynes was studied via an adaptive natural density partitioning (AdNDP) algorithm and the induced magnetic field analysis. A unique chemical bonding pattern was discovered where the M=C (M: Os, Re) double bond coexists with the delocalized 6c-2e π-bonding elements responsible for aromatic properties of the investigated complexes. In opposition to the previous description where 8 delocalized π-electrons were reported in metallabenzenes and metallabenzynes, we showed that only six delocalized π-electrons are present in those molecules. Thus, there is no deviation from Hückel's aromaticity rule for metallabenzynes/metallabenzenes complexes. Based on the discovered bonding pattern, we propose two thermodynamically stable novel molecules that possess not only π-delocalization but also retain six σ-delocalized electrons, rendering them as doubly aromatic species. As a result, our investigation gives a new direction for the search for carbon-metal doubly aromatic molecules.
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Affiliation(s)
- Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322-0300, USA;
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autonoma de Chile, El Llano Subercaseaux, Santiago 2801, Chile;
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autonoma de Chile, El Llano Subercaseaux, Santiago 2801, Chile;
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322-0300, USA;
- Correspondence:
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11
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Zhang W, Tkachenko NV, Qiao L, Boldyrev AI, Sun Z. Synthesis and Structure of Binary Copper/Silver–Arsenic Clusters Derived from Zintl Ion As
7
3–. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100682] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wei‐Qiang Zhang
- State Key Laboratory of Elemento‐Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322‐0300 USA
| | - Lei Qiao
- State Key Laboratory of Elemento‐Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322‐0300 USA
| | - Zhong‐Ming Sun
- State Key Laboratory of Elemento‐Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering Nankai University Tianjin 300350 China
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12
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Tkachenko NV, Popov IA, Kulichenko M, Fedik N, Sun Z, Muñoz‐Castro A, Boldyrev AI. Bridging Aromatic/Antiaromatic Units: Recent Advances in Aromaticity and Antiaromaticity in Main‐Group and Transition‐Metal Clusters from Bonding and Magnetic Analyses. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill 84322-0300 Logan UT USA
| | - Ivan A. Popov
- Theoretical Division Los Alamos National Laboratory 87545 Los Alamos NM USA
| | - Maksim Kulichenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill 84322-0300 Logan UT USA
| | - Nikita Fedik
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill 84322-0300 Logan UT USA
| | - Zhong‐Ming Sun
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University 300350 Tianjin China
| | - Alvaro Muñoz‐Castro
- Grupo de Química Inorgánica y Materiales Moleculares Facultad de Ingeniería Universidad Autonoma de Chile El Llano Subercaseaux 2801 Santiago Chile
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill 84322-0300 Logan UT USA
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13
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Tkachenko NV, Tkachenko AA, Kulyukin VA, Boldyrev AI. DFT Study of Microsolvated [NO 3·(H 2O) n] - ( n = 1-12) Clusters and Molecular Dynamics Simulation of Nitrate Solution. J Phys Chem A 2021; 125:8899-8906. [PMID: 34591472 DOI: 10.1021/acs.jpca.1c07206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Investigation of the process of the NO3- anion solvation is central to understanding the chemical and physical properties of its aqueous solutions. The importance of this topic can be seen in atmospheric chemistry, as well as in nuclear waste processing research. In this work, we used a particle swarm optimization technique driven by density functional theory to sample the potential energy surface of various microsolvated [NO3·(H2O)n]- (n = 1-12) clusters. We found that the charge transfer plays a crucial role in the stabilization of the investigated species. Moreover, by conducting ab initio molecular dynamics simulations, we showed that at low concentrations (∼0.2 M) the NO3- species tend to be located on the surface of water solution. We also observed that the contact ion pair K+-NO3- undergoes a fast dissociation and each of the ions is solvated separately. As a result, from our calculations, we expect that at low concentration there could be oppositely signed concentration gradients for NO3- and K+ ions in a thin water film.
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Affiliation(s)
- Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Anastasiia A Tkachenko
- Department of Computer Science, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Vladimir A Kulyukin
- Department of Computer Science, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
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14
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Xu H, Tkachenko NV, Muñoz‐Castro A, Boldyrev AI, Sun Z. Berichtigung: [Sn
8
]
6−
‐Bridged Mixed‐Valence Zn
I
/Zn
II
in {[K
2
ZnSn
8
(ZnMes)]
2
}
4−
Inverse Sandwich‐Type Cluster Supported by a Zn
I
−Zn
I
Bond. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Xu HL, Tkachenko NV, Muñoz-Castro A, Boldyrev AI, Sun ZM. Corrigendum: [Sn 8 ] 6- -Bridged Mixed-Valence Zn I /Zn II in {[K 2 ZnSn 8 (ZnMes)] 2 } 4- Inverse Sandwich-Type Cluster Supported by a Zn I -Zn I Bond. Angew Chem Int Ed Engl 2021; 60:18916. [PMID: 34402575 DOI: 10.1002/anie.202108772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Xu YH, Tkachenko NV, Popov IA, Qiao L, Muñoz-Castro A, Boldyrev AI, Sun ZM. Ternary aromatic and anti-aromatic clusters derived from the hypho species [Sn 2Sb 5] 3. Nat Commun 2021; 12:4465. [PMID: 34294702 PMCID: PMC8298489 DOI: 10.1038/s41467-021-24706-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 07/01/2021] [Indexed: 02/06/2023] Open
Abstract
Heterometallic clusters have attracted broad interests in the synthetic chemistry due to their various coordination modes and potential applications in heterogeneous catalysis. Here we report the synthesis, experimental, and theoretical characterizations of four ternary clusters ([M2(CO)6Sn2Sb5]3- (M = Cr, Mo), and [(MSn2Sb5)2]4-, (M = Cu, Ag)) in the process of capturing the hypho- [Sn2Sb5]3- in ethylenediamine (en) solution. We show that the coordination of the binary anion to transition-metal ions or fragments provides additional stabilization due to the formation of locally σ-aromatic units, producing a spherical aromatic shielding region in the cages. While in the case of [Mo2(CO)6Sn2Sb5]3- stabilization arises from locally σ-aromatic three-centre and five-centre two-electron bonds, aromatic islands in [(AgSn2Sb5)2]4- and [(CuSn2Sb5)2]4- render them globally antiaromatic. This work describes the coordination chemistry of the versatile building block [Sn2Sb5]3-, thus providing conceptual advances in the field of metal-metal bonding in clusters.
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Affiliation(s)
- Yu-He Xu
- grid.216938.70000 0000 9878 7032State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, China
| | - Nikolay V. Tkachenko
- grid.53857.3c0000 0001 2185 8768Department of Chemistry and Biochemistry, Utah State University, Logan, UT USA
| | - Ivan A. Popov
- grid.148313.c0000 0004 0428 3079Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM USA
| | - Lei Qiao
- grid.216938.70000 0000 9878 7032State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, China
| | - Alvaro Muñoz-Castro
- grid.441837.d0000 0001 0765 9762Grupo de Química Inorgánicay Materiales Moleculares, Facultad de Ingenieria, Universidad Autonoma de Chile, El Llano Subercaseaux, Santiago, Chile
| | - Alexander I. Boldyrev
- grid.53857.3c0000 0001 2185 8768Department of Chemistry and Biochemistry, Utah State University, Logan, UT USA
| | - Zhong-Ming Sun
- grid.216938.70000 0000 9878 7032State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, China
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Abstract
The mechanism of ketones homogeneous hydrogenation with t-BuOK in tert-butanol is currently portrayed as the one proceeding via a six-membered [2 + 2 + 2] cyclic transition state involving the H2 molecule, the base, and a ketone. However, the concerted nature of the reaction is inconsistent with a number of experimental observations. Here we reanalyze available experimental data and revise the mechanism of this paradigmatic reaction based on the static and dynamic density functional theory (DFT) calculations in solution phase. In contrast to the gas-phase profile where the overall reaction occurs in two elementary steps, there are three consecutive steps in solution: cleavage of the H-H bond in basic tert-butanol to afford potassium hydride, addition of potassium hydride across the C═O bond of a ketone through the rate-determining transition state, and rapid product formation through K/H exchange. Potassium hydride is therefore an important intermediate of the catalytic process. The free energy profile for the prophetic ester homogeneous hydrogenation with t-BuOK in tert-butanol is also computed herein. The reaction seems to be kinetically possible, but slightly harsher conditions need to be applied, consistent with rate-determining nature of the potassium hydride addition.
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Affiliation(s)
- Pavel A Dub
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Nikolay V Tkachenko
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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18
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Dub PA, Tkachenko NV, Vyas VK, Wills M, Smith JS, Tretiak S. Enantioselectivity in the Noyori–Ikariya Asymmetric Transfer Hydrogenation of Ketones. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00201] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Pavel A. Dub
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Nikolay V. Tkachenko
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, United States
| | - Vijyesh K. Vyas
- Department of Chemistry, The University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Martin Wills
- Department of Chemistry, The University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Justin S. Smith
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Sergei Tretiak
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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19
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Xu HL, Tkachenko NV, Muñoz-Castro A, Boldyrev AI, Sun ZM. [Sn 8 ] 6- -Bridged Mixed-Valence Zn I /Zn II in {[K 2 ZnSn 8 (ZnMes)] 2 } 4- Inverse Sandwich-Type Cluster Supported by a Zn I -Zn I Bond. Angew Chem Int Ed Engl 2021; 60:9990-9995. [PMID: 33682237 DOI: 10.1002/anie.202102578] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Indexed: 11/08/2022]
Abstract
Since [Sn8 ]6- was discovered from the solid-state phase in 2000, its solution chemistry has been elusive due to the high charges and chemical activity. Herein, we report the synthesis and characterization of an inverse sandwich-type cluster dimer {[K2 ZnSn8 (ZnMes)]2 }4- (1 a), in which the highly charged [Sn8 ]6- is captured by mixed-valence ZnI /ZnII to form the dimer {closo-[Zn2 Sn8 ]}2 moieties bridged by a Zn-Zn bond. Such Zn-Sn cluster not only exhibits a novel example of mixed-valence ZnI /ZnII for stabilizing highly active anion species, but also indicates the [Sn8 ]6- cluster can act as a novel bridging ligand, like arene, with a η4 :η4 -fashion. Theoretical calculations indicate that a significant delocalization of electrons over Zn atoms plays a vital role in the stabilization of the [Sn8 ]6- species. The AdNDP and magnetic response analyses clearly showed the presence of local σ-aromaticity in three cluster fragments: two ZnSn4 caps and Sn8 square antiprism.
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Affiliation(s)
- Hong-Lei Xu
- State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT, 84322-0300, USA
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánicay Materiales Moleculares, Facultad de Ingenieria, Universidad Autonoma de Chile, El Llano Subercaseaux, Santiago, 2801, Chile
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT, 84322-0300, USA
| | - Zhong-Ming Sun
- State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China
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20
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Xu H, Tkachenko NV, Muñoz‐Castro A, Boldyrev AI, Sun Z. [Sn
8
]
6−
‐Bridged Mixed‐Valence Zn
I
/Zn
II
in {[K
2
ZnSn
8
(ZnMes)]
2
}
4−
Inverse Sandwich‐Type Cluster Supported by a Zn
I
−Zn
I
Bond. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hong‐Lei Xu
- State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322-0300 USA
| | - Alvaro Muñoz‐Castro
- Grupo de Química Inorgánicay Materiales Moleculares Facultad de Ingenieria Universidad Autonoma de Chile El Llano Subercaseaux Santiago 2801 Chile
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322-0300 USA
| | - Zhong‐Ming Sun
- State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications School of Materials Science and Engineering Nankai University Tianjin 300350 China
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21
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Semenok DV, Zhou D, Kvashnin AG, Huang X, Galasso M, Kruglov IA, Ivanova AG, Gavriliuk AG, Chen W, Tkachenko NV, Boldyrev AI, Troyan I, Oganov AR, Cui T. Novel Strongly Correlated Europium Superhydrides. J Phys Chem Lett 2021; 12:32-40. [PMID: 33296213 DOI: 10.1021/acs.jpclett.0c03331] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We conducted a joint experimental-theoretical investigation of the high-pressure chemistry of europium polyhydrides at pressures of 86-130 GPa. We discovered several novel magnetic Eu superhydrides stabilized by anharmonic effects: cubic EuH9, hexagonal EuH9, and an unexpected cubic (Pm3n) clathrate phase, Eu8H46. Monte Carlo simulations indicate that cubic EuH9 has antiferromagnetic ordering with TN of up to 24 K, whereas hexagonal EuH9 and Pm3n-Eu8H46 possess ferromagnetic ordering with TC = 137 and 336 K, respectively. The electron-phonon interaction is weak in all studied europium hydrides, and their magnetic ordering excludes s-wave superconductivity, except, perhaps, for distorted pseudohexagonal EuH9. The equations of state predicted within the DFT+U approach (U - J were found within linear response theory) are in close agreement with the experimental data. This work shows the great influence of the atomic radius on symmetry-breaking distortions of the crystal structures of superhydrides and on their thermodynamic stability.
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Affiliation(s)
- Dmitrii V Semenok
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Bolshoy Boulevard 30, bld. 1, Moscow 143026, Russia
| | - Di Zhou
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Alexander G Kvashnin
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Bolshoy Boulevard 30, bld. 1, Moscow 143026, Russia
| | - Xiaoli Huang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Michele Galasso
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Bolshoy Boulevard 30, bld. 1, Moscow 143026, Russia
| | - Ivan A Kruglov
- Moscow Institute of Physics and Technology, 9 Institutsky Lane, Dolgoprudny 141700, Russia
- Dukhov Research Institute of Automatics (VNIIA), Moscow 127055, Russia
| | - Anna G Ivanova
- Shubnikov Institute of Crystallography, Federal Scientific Research Center Crystallography and Photonics, Russian Academy of Sciences, 59 Leninskii pr-t, Moscow 119333, Russia
| | - Alexander G Gavriliuk
- Shubnikov Institute of Crystallography, Federal Scientific Research Center Crystallography and Photonics, Russian Academy of Sciences, 59 Leninskii pr-t, Moscow 119333, Russia
- IC RAS Institute for Nuclear Research, Russian Academy of Sciences, Moscow 117312, Russia
| | - Wuhao Chen
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Ivan Troyan
- Shubnikov Institute of Crystallography, Federal Scientific Research Center Crystallography and Photonics, Russian Academy of Sciences, 59 Leninskii pr-t, Moscow 119333, Russia
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Bolshoy Boulevard 30, bld. 1, Moscow 143026, Russia
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
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22
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Zeng L, Sirbu D, Waddell PG, Tkachenko NV, Probert MR, Benniston AC. Hydrogen peroxide assisted photorelease of an anthraquinone-based ligand from [Ru(2,2'-bipyridine) 2(9,10-dioxo-9,10-dihydroanthracen-1-olate)]Cl in aqueous solution. Dalton Trans 2020; 49:13243-13252. [PMID: 32845949 DOI: 10.1039/d0dt02339f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A new class of light-activated ruthenium(ii) complex was designed as a potential blocker of biological functioning, especially for targeting redox reactions within mitochondria under light activation. Based on our concepts the complex [Ru(bipy)2(1-hydroxyanthra-9,10 quinone)]Cl (RU1) was prepared and studied to understand the preliminary reaction mechanisms and its excited state behaviour through a series of stability tests, electrochemistry, UV-Visible kinetics and femtosecond transient absorption spectroscopy experiments. Under white light in the presence of H2O2 two different reactions (fast and slow) appear to take place. The complex loses the quinone-based ligand and a resulting Ru(iii) or Ru(v) species is produced. The complex RU1 shows potential to consume H2O2 from the one carbon metabolism in mitochondria, and hence may cut the energy cycle pathway of tumor cells.
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Affiliation(s)
- L Zeng
- Molecular Photonics Laboratory, Chemistry-School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
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23
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Xu H, Popov IA, Tkachenko NV, Wang Z, Muñoz‐Castro A, Boldyrev AI, Sun Z. σ‐Aromaticity‐Induced Stabilization of Heterometallic Supertetrahedral Clusters [Zn
6
Ge
16
]
4−
and [Cd
6
Ge
16
]
4−. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008276] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hong‐Lei Xu
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Ivan A. Popov
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322-0300 USA
| | - Zi‐Chuan Wang
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Alvaro Muñoz‐Castro
- Grupo de Química Inorgánicay Materiales Moleculares Facultad de Ingenieria Universidad Autonoma de Chile El Llano Subercaseaux Santiago 2801 Chile
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322-0300 USA
| | - Zhong‐Ming Sun
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 China
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24
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Xu H, Popov IA, Tkachenko NV, Wang Z, Muñoz‐Castro A, Boldyrev AI, Sun Z. σ‐Aromaticity‐Induced Stabilization of Heterometallic Supertetrahedral Clusters [Zn
6
Ge
16
]
4−
and [Cd
6
Ge
16
]
4−. Angew Chem Int Ed Engl 2020; 59:17286-17290. [DOI: 10.1002/anie.202008276] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Hong‐Lei Xu
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Ivan A. Popov
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322-0300 USA
| | - Zi‐Chuan Wang
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Alvaro Muñoz‐Castro
- Grupo de Química Inorgánicay Materiales Moleculares Facultad de Ingenieria Universidad Autonoma de Chile El Llano Subercaseaux Santiago 2801 Chile
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan UT 84322-0300 USA
| | - Zhong‐Ming Sun
- Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 China
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25
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Narendrapurapu BS, Bowman MC, Xie Y, Schaefer HF, Tkachenko NV, Boldyrev AI, Li G. Dibridged, Monobridged, Vinylidene-Like, and Linear Structures for the Alkaline Earth Dihydrides Be 2H 2, Mg 2H 2, Ca 2H 2, Sr 2H 2, and Ba 2H 2. Proposals for Observations. Inorg Chem 2020; 59:10404-10408. [PMID: 32674579 DOI: 10.1021/acs.inorgchem.0c01651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This research reports a search for peculiar monobridged structures of the E2H2 molecules (E = Be, Mg, Ca, Sr, Ba). For Be2H2 and Mg2H2, the monobridged geometry is not an equilibrium but rather a transition state between the vinylidene-like structure and the global minimum HE-EH linear geometry. However, for Ca2H2, Sr2H2, and Ba2H2, this situation changes significantly; the linear structure is no longer the global minimum but lies higher in energy than two other equilibria, the dibridged and monobridged structures. The planar dibridged structures of both Sr2H2 and Ba2H2 should be observable via IR spectroscopy. Although the remarkable monobridged structures lie 8.3 (Sr) and 7.6 kcal/mol (Ba) higher, the large IR intensities of the terminal E-H stretching frequencies may make the monobridged structures observable. The monobridged structures have sizable permanent dipole moments (3.07 and 3.06 D for Sr and Ba, respectively) and also should be observable via microwave spectroscopy.
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Affiliation(s)
- Beulah S Narendrapurapu
- Department of Chemistry, Georgia Southern University, Statesboro, Georgia 30460, United States
| | - Michael C Bowman
- Department of Chemistry, Taylor University, Upland, Indiana 46989, United States
| | - Yaoming Xie
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, United States
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, United States
| | - Guoliang Li
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Center for Computational Quantum Chemistry, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
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26
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Steglenko DV, Tkachenko NV, Boldyrev AI, Minyaev RM, Minkin VI. Stability, electronic, and optical properties of two-dimensional phosphoborane. J Comput Chem 2020; 41:1456-1463. [PMID: 32176381 DOI: 10.1002/jcc.26189] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 02/24/2020] [Indexed: 01/16/2023]
Abstract
The structure and properties of two-dimensional phosphoborane sheets were computationally investigated using Density Functional Theory calculations. The calculated phonon spectrum and band structure point to dynamic stability and allowed characterization of the predicted two-dimensional material as a direct-gap semiconductor with a band gap of ~1.5 eV. The calculation of the optical properties showed that the two-dimensional material has a relatively small absorptivity coefficient. The parameters of the mechanical properties characterize the two-dimensional phosphoborane as a relatively soft material, similar to the monolayer of MoS2 . Assessment of thermal stability by the method of molecular dynamics indicates sufficient stability of the predicted material, which makes it possible to observe it experimentally.
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Affiliation(s)
- Dmitriy V Steglenko
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don, Russia
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah, USA
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah, USA
| | - Ruslan M Minyaev
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don, Russia
| | - Vladimir I Minkin
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don, Russia
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27
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Tkachenko NV, Zhang X, Qiao L, Shu C, Steglenko D, Muñoz‐Castro A, Sun Z, Boldyrev AI. Spherical Aromaticity of All‐Metal [Bi@In
8
Bi
12
]
3−/5−
Clusters. Chemistry 2020; 26:2073-2079. [DOI: 10.1002/chem.201905264] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/17/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan Utah 84322-0300 USA
| | - Xiang‐Wen Zhang
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Nankai University Tianjin 300350 P. R. China
| | - Lei Qiao
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Nankai University Tianjin 300350 P. R. China
| | - Cong‐Cong Shu
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Nankai University Tianjin 300350 P. R. China
| | - Dmitry Steglenko
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachki Ave. Rostov-on-Don 344090 Russian Federation
| | - Alvaro Muñoz‐Castro
- Grupo de Química InorgánicayMateriales Moleculares Facultad de Ingenieria Universidad Autonoma de Chile El Llano Subercaseaux 2801 Santiago Chile
| | - Zhong‐Ming Sun
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Nankai University Tianjin 300350 P. R. China
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill Logan Utah 84322-0300 USA
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachki Ave. Rostov-on-Don 344090 Russian Federation
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28
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Wang ZC, Tkachenko NV, Qiao L, Matito E, Muñoz-Castro A, Boldyrev AI, Sun ZM. All-metal σ-antiaromaticity in dimeric cluster anion {[CuGe 9Mes] 2} 4. Chem Commun (Camb) 2020; 56:6583-6586. [PMID: 32400811 DOI: 10.1039/d0cc02525a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In this work, we report a dimeric cluster anion, {[CuGe9Mes]2}4-, which was isolated as the [K(2,2,2-crypt)]+ salt and characterized by using single-crystal X-ray diffraction and ESI mass spectroscopy. The title cluster represents the first locally σ-antiaromatic compound in the solid state, as well as the first heteroatomic antiaromatic compound.
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Affiliation(s)
- Zi-Chuan Wang
- School of Materials Science and Engineering, State Key Laboratory of Element-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China.
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University 0300 Old Main Hill, Logan, UT 84322-0300, USA.
| | - Lei Qiao
- School of Materials Science and Engineering, State Key Laboratory of Element-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China.
| | - Eduard Matito
- Donostia International Physics Center (DIPC), Donostia 20080, Euskadi, Spain and IKERBASQUE, Basque Foundation for Science, Bilbao 48011, Euskadi, Spain
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánicay Materiales Moleculares, Facultad de Ingenieria, Universidad Autonoma de Chile, El Llano Subercaseaux, Santiago 2801, Chile
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University 0300 Old Main Hill, Logan, UT 84322-0300, USA.
| | - Zhong-Ming Sun
- School of Materials Science and Engineering, State Key Laboratory of Element-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China.
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29
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Tkachenko NV, Sun Z, Boldyrev AI. Record Low Ionization Potentials of Alkali Metal Complexes with Crown Ethers and Cryptands. Chemphyschem 2019. [DOI: 10.1002/cphc.201900754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nikolay V. Tkachenko
- Department of Chemistry and BiochemistryUtah State University, Logan Utah 84322 United States
| | - Zhong‐Ming Sun
- School of Materials Science and Engineering, State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Lab for Rare Earth Materials and ApplicationsNankai University Tianjin 300350 China
| | - Alexander I. Boldyrev
- Department of Chemistry and BiochemistryUtah State University, Logan Utah 84322 United States
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30
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Tkachenko NV, Sun ZM, Boldyrev AI. Record Low Ionization Potentials of Alkali Metal Complexes with Crown Ethers and Cryptands. Chemphyschem 2019; 20:2060-2062. [PMID: 31184431 DOI: 10.1002/cphc.201900422] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 06/10/2019] [Indexed: 11/10/2022]
Abstract
Electronic properties of series of alkali metals complexes with crown ethers and cryptands were studied via DFT hybrid functionals. For [M([2.2.2]crypt)] (M=Li, Na, K) extremely low (1.70-1.52 eV) adiabatic ionization potentials were found. Such low values of ionization energies are significantly lower than those of alkali metal atoms. Thus, the investigated complexes can be defined as superalkalis. As a result, our investigation opens up new directions in the designing of chemical species with record low ionization potentials and extends the explanation of the ability of the cryptates and alkali crown ether complexes to stabilize multiple charged Zintl ions.
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Affiliation(s)
- Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University Logan, Utah, 84322, United States
| | - Zhong-Ming Sun
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin, 300350, China
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University Logan, Utah, 84322, United States
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31
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Liu C, Tkachenko NV, Popov IA, Fedik N, Min X, Xu C, Li J, McGrady JE, Boldyrev AI, Sun Z. Inside Cover: Structure and Bonding in [Sb@In
8
Sb
12
]
3−
and [Sb@In
8
Sb
12
]
5−
(Angew. Chem. Int. Ed. 25/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201905963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chao Liu
- School of Materials Science and EngineeringState Key Laboratory of Elemento-Organic ChemistryTianjin Key Lab for Rare Earth Materials and ApplicationsCentre for Rare earth and inorganic functional materialsNankai University Tianjin 300350 China
- College of Chemistry and Chemical EngineeringCentral South University Changsha 410083 Hunan P. R. China
| | - Nikolay V. Tkachenko
- Department of Chemistry and BiochemistryUtah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Ivan A. Popov
- Theoretical DivisionLos Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Nikita Fedik
- Department of Chemistry and BiochemistryUtah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Xue Min
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
| | - Cong‐Qiao Xu
- Department of Chemistry and Key Laboratory of OrganicOptoelectronics & Molecular Engineering of Ministry of EducationTsinghua University Beijing 100084 China
| | - Jun Li
- Department of Chemistry and Key Laboratory of OrganicOptoelectronics & Molecular Engineering of Ministry of EducationTsinghua University Beijing 100084 China
| | - John E. McGrady
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QZ UK
| | - Alexander I. Boldyrev
- Department of Chemistry and BiochemistryUtah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Zhong‐Ming Sun
- School of Materials Science and EngineeringState Key Laboratory of Elemento-Organic ChemistryTianjin Key Lab for Rare Earth Materials and ApplicationsCentre for Rare earth and inorganic functional materialsNankai University Tianjin 300350 China
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
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32
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Liu C, Tkachenko NV, Popov IA, Fedik N, Min X, Xu C, Li J, McGrady JE, Boldyrev AI, Sun Z. Structure and Bonding in [Sb@In
8
Sb
12
]
3−
and [Sb@In
8
Sb
12
]
5−. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chao Liu
- School of Materials Science and EngineeringState Key Laboratory of Elemento-Organic ChemistryTianjin Key Lab for Rare Earth Materials and ApplicationsCentre for Rare earth and inorganic functional materialsNankai University Tianjin 300350 China
- College of Chemistry and Chemical EngineeringCentral South University Changsha 410083 Hunan P. R. China
| | - Nikolay V. Tkachenko
- Department of Chemistry and BiochemistryUtah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Ivan A. Popov
- Theoretical DivisionLos Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Nikita Fedik
- Department of Chemistry and BiochemistryUtah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Xue Min
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
| | - Cong‐Qiao Xu
- Department of Chemistry and Key Laboratory of OrganicOptoelectronics & Molecular Engineering of Ministry of EducationTsinghua University Beijing 100084 China
| | - Jun Li
- Department of Chemistry and Key Laboratory of OrganicOptoelectronics & Molecular Engineering of Ministry of EducationTsinghua University Beijing 100084 China
| | - John E. McGrady
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QZ UK
| | - Alexander I. Boldyrev
- Department of Chemistry and BiochemistryUtah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Zhong‐Ming Sun
- School of Materials Science and EngineeringState Key Laboratory of Elemento-Organic ChemistryTianjin Key Lab for Rare Earth Materials and ApplicationsCentre for Rare earth and inorganic functional materialsNankai University Tianjin 300350 China
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
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33
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Liu C, Tkachenko NV, Popov IA, Fedik N, Min X, Xu C, Li J, McGrady JE, Boldyrev AI, Sun Z. Structure and Bonding in [Sb@In
8
Sb
12
]
3−
and [Sb@In
8
Sb
12
]
5−. Angew Chem Int Ed Engl 2019; 58:8367-8371. [DOI: 10.1002/anie.201904109] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Chao Liu
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Centre for Rare earth and inorganic functional materials Nankai University Tianjin 300350 China
- College of Chemistry and Chemical Engineering Central South University Changsha 410083 Hunan P. R. China
| | - Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Ivan A. Popov
- Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Nikita Fedik
- Department of Chemistry and Biochemistry Utah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Xue Min
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
| | - Cong‐Qiao Xu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - John E. McGrady
- Department of Chemistry University of Oxford South Parks Road Oxford OX1 3QZ UK
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Zhong‐Ming Sun
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Centre for Rare earth and inorganic functional materials Nankai University Tianjin 300350 China
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
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34
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Liu C, Tkachenko NV, Popov IA, Fedik N, Min X, Xu C, Li J, McGrady JE, Boldyrev AI, Sun Z. Structure and Bonding in [Sb@In
8
Sb
12
]
3−
and [Sb@In
8
Sb
12
]
5−. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904109] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chao Liu
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Centre for Rare earth and inorganic functional materials Nankai University Tianjin 300350 China
- College of Chemistry and Chemical Engineering Central South University Changsha 410083 Hunan P. R. China
| | - Nikolay V. Tkachenko
- Department of Chemistry and Biochemistry Utah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Ivan A. Popov
- Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Nikita Fedik
- Department of Chemistry and Biochemistry Utah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Xue Min
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
| | - Cong‐Qiao Xu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084 China
| | - John E. McGrady
- Department of Chemistry University of Oxford South Parks Road Oxford OX1 3QZ UK
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry Utah State University 0300, Old Main Hill Logan Utah 84322-0300 USA
| | - Zhong‐Ming Sun
- School of Materials Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Lab for Rare Earth Materials and Applications Centre for Rare earth and inorganic functional materials Nankai University Tianjin 300350 China
- State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
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35
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Abstract
A new chemical bonding picture of various nonagermanide species were presented. The stability of Ge9 fragments could be well described via the concept of multiple local σ-aromaticity.
Nonagermanide clusters are widely used in inorganic synthesis and are actively studied by experimentalists and theoreticians. However, chemical bonding of such versatile species is still not completely understood. In our work we deciphered a bonding pattern for various experimentally obtained nonagermanide species. We localized the electron density via the AdNDP algorithm for the model structures ([Ge9]4–, [Ge9{P(NH2)2}3]–, Cu[Ge9{P(NH2)2}3] and Cu(NHC)[Ge9{P(NH2)2}3]) and obtained a simple and chemically intuitive bonding pattern which can explain the variety of active sites and the existence of both D3h and C4v geometries for such clusters. Moreover, the [Ge9]4– core is found to be a unique example of an inorganic Zintl cluster with multiple local σ-aromaticity.
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Affiliation(s)
- Nikolay V Tkachenko
- Department of Chemistry and Biochemistry , Utah State University , 0300 Old Main Hill , Logan , UT 84322-0300 , USA .
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry , Utah State University , 0300 Old Main Hill , Logan , UT 84322-0300 , USA .
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36
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Abstract
Optically pure 1,1′-bi-2-naphthol (BINOL) and its derivatives are among the most widely
used chiral ligands and auxiliaries for asymmetric synthesis. These molecules also occur as scaffolds for
various biologically active compounds. Direct oxidative coupling of 2-naphthols in the presence of chiral
catalysts provides a powerful strategy for the synthesis of optically pure 1,1′-bi-2-naphthols
(BINOLS). In 1978, Wynberg with co-workers discovered that a copper salt with chiral auxiliary mediates
the oxidative coupling of 2-naphthols, which can be taken as the starting point for further progress
in this area. Over the last decades, a number of efficient and stereoselective catalyst systems have been
developed. This mini-review surveys the aerobic asymmetric oxidative coupling of 2-naphthols catalyzed
by transition metal complexes reported since 1995.
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Affiliation(s)
- Nikolay V. Tkachenko
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation, and Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Lavrentieva 5, 630090, Novosibirsk, Russian Federation
| | - Konstantin P. Bryliakov
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation, and Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Lavrentieva 5, 630090, Novosibirsk, Russian Federation
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37
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Tkachenko NV, Steglenko D, Fedik N, Boldyreva NM, Minyaev RM, Minkin VI, Boldyrev AI. Superoctahedral two-dimensional metallic boron with peculiar magnetic properties. Phys Chem Chem Phys 2019; 21:19764-19771. [DOI: 10.1039/c9cp03786a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel two-dimensional ferromagnetic stable boron material has been predicted and exhaustively studied with DFT methods. Its magnetism can be described by the presence of two unpaired delocalized bonding elements inside each distorted octahedron.
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Affiliation(s)
| | - Dmitriy Steglenko
- Institute of Physical and Organic Chemistry
- Southern Federal University
- Rostov-on-Don
- Russian Federation
| | - Nikita Fedik
- Department of Chemistry and Biochemistry
- Utah State University
- Logan
- USA
- Institute of Physical and Organic Chemistry
| | - Natalia M. Boldyreva
- Institute of Physical and Organic Chemistry
- Southern Federal University
- Rostov-on-Don
- Russian Federation
| | - Ruslan M. Minyaev
- Institute of Physical and Organic Chemistry
- Southern Federal University
- Rostov-on-Don
- Russian Federation
| | - Vladimir I. Minkin
- Institute of Physical and Organic Chemistry
- Southern Federal University
- Rostov-on-Don
- Russian Federation
| | - Alexander I. Boldyrev
- Department of Chemistry and Biochemistry
- Utah State University
- Logan
- USA
- Institute of Physical and Organic Chemistry
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38
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Tkachenko NV, Boldyrev AI. Chemical bonding analysis of excited states using the adaptive natural density partitioning method. Phys Chem Chem Phys 2019; 21:9590-9596. [PMID: 31020963 DOI: 10.1039/c9cp00379g] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel approach to chemical bond analysis for excited states has been developed. Using an extended adaptive natural density partitioning method (AdNDP) as implemented in AdNDP 2.0 code, we obtained chemically intuitive bonding patterns for the excited states of H2O, B5+, and C2H4+ molecules. The deformation pathway in the excited states could be easily predicted based on the analysis of the chemical bond pattern. We expect that this new method of chemical bonding analysis would be very helpful for photochemistry, photoelectron spectroscopy, electron spectroscopy and other chemical applications that involved excited states.
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Affiliation(s)
- Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, USA.
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39
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Tkachenko NV, Lyakin OY, Zima AM, Talsi EP, Bryliakov KP. Effect of different carboxylic acids on the aromatic hydroxylation with H2O2 in the presence of an iron aminopyridine complex. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.07.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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40
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Tkachenko NV, Ottenbacher RV, Lyakin OY, Zima AM, Samsonenko DG, Talsi EP, Bryliakov KP. Highly Efficient Aromatic C−H Oxidation with H2
O2
in the Presence of Iron Complexes of the PDP Family. ChemCatChem 2018. [DOI: 10.1002/cctc.201800832] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nikolay V. Tkachenko
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russia
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
| | - Roman V. Ottenbacher
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russia
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
| | - Oleg Y. Lyakin
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russia
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
| | - Alexandra M. Zima
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russia
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
| | - Denis G. Samsonenko
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
- Nikolaev Institute of Inorganic Chemistry; Pr. Lavrentieva 3 Novosibirsk 630090 Russia
| | - Evgenii P. Talsi
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russia
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
| | - Konstantin P. Bryliakov
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russia
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russia
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41
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Lyakin OY, Zima AM, Tkachenko NV, Bryliakov KP, Talsi EP. Direct Evaluation of the Reactivity of Nonheme Iron(V)–Oxo Intermediates toward Arenes. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00661] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oleg Y. Lyakin
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation
| | - Alexandra M. Zima
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation
| | - Nikolay V. Tkachenko
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation
| | - Konstantin P. Bryliakov
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation
| | - Evgenii P. Talsi
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation
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42
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Tkachenko NV, Lyakin OY, Samsonenko DG, Talsi EP, Bryliakov KP. Highly efficient asymmetric aerobic oxidative coupling of 2-naphthols in the presence of bioinspired iron aminopyridine complexes. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2017.10.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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43
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Arvani M, Virkki K, Abou-Chahine F, Efimov A, Schramm A, Tkachenko NV, Lupo D. Photoinduced hole transfer in QD-phthalocyanine hybrids. Phys Chem Chem Phys 2016; 18:27414-27421. [PMID: 27722635 DOI: 10.1039/c6cp04374g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of CdSe quantum dot (QD)-phthalocyanine (Pc) hybrids were synthesized and their photophysics was studied using steady state and time-resolved spectroscopic methods. Emission of QDs was progressively quenched upon increasing the concentration of Pc in the hybrids. A detailed transient absorption study of the hybrids revealed that the mechanism of quenching is charge separation, resulting in the formation of hybrids with negatively charged QDs and the Pc cation. Direct photo-excitation of Pc did not show any detectable interaction between the excited state of Pc and the QD to which it is attached. An explanation is proposed, based on the suggestion that the energy of the lowest unoccupied molecular orbital (LUMO) of Pc is lower than the lower edge of the QD conduction band, while the energy of the highest occupied molecular orbital (HOMO) of Pc is sufficiently higher than the high energy edge of the QD valence band (VB), thus permitting hole transfer from the QD VB to the Pc HOMO after photo-excitation of QDs.
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Affiliation(s)
- M Arvani
- Department of Electronics and Communications Engineering, Tampere University of Technology, 33720 Tampere, Finland.
| | - K Virkki
- Department of Chemistry and Bioengineering, Tampere University of Technology, 33720 Tampere, Finland.
| | - F Abou-Chahine
- Department of Chemistry and Bioengineering, Tampere University of Technology, 33720 Tampere, Finland.
| | - A Efimov
- Department of Chemistry and Bioengineering, Tampere University of Technology, 33720 Tampere, Finland.
| | - A Schramm
- Department of Electronics and Communications Engineering, Tampere University of Technology, 33720 Tampere, Finland.
| | - N V Tkachenko
- Department of Chemistry and Bioengineering, Tampere University of Technology, 33720 Tampere, Finland.
| | - D Lupo
- Department of Electronics and Communications Engineering, Tampere University of Technology, 33720 Tampere, Finland.
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44
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Baranov VM, Solopov IN, Gorbaneva EP, Tamozhnikov DV, Iumatova SN, Kuznetsova TI, Sentiabrev NN, Kamchatnikov AG, Tkachenko NV, Medvedev DV. [Optimization of directed training loads on the respiratory system]. Aviakosm Ekolog Med 2008; 42:36-39. [PMID: 18714725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Potentiality of an increased elastic resistance to respiratory movements in improving the functional conditioning of young athletes was evaluated. Training with increased elastic resistance to respiration brought about gains in strength and endurance of the respiratory muscles, growth of the maximal oxygen consumption, work ability, and special physical fitness of athletes.
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45
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Voronov VV, Dorosh IR, Kuz'minov YS, Tkachenko NV. Photoinduced light scattering in cerium-doped barium strontium niobate crystals. ACTA ACUST UNITED AC 2007. [DOI: 10.1070/qe1980v010n11abeh010298] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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46
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Abstract
Kinetics of the photo-induced processes of the transient states of the 3,4-didehydroretinal (3,4-dhr) modified bacteriorhodopsin (bR) was studied by a flash photolysis method in a water suspension at room temperature. The excitation initiated a photocycle with several transient intermediates similar to the trans photocycle of native bR. The main observation of the study was that although major part (80%) of the population of the M state relaxed via the O intermediate as in natural bR, 20% relaxed directly to the bR ground state in 200 ms.
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Affiliation(s)
- T Jussila
- Institute of Materials Chemistry, Tampere University of Technology, P.O. Box 541, Tampere, Finland.
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47
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Vehmanen V, Tkachenko NV, Imahori H, Fukuzumi S, Lemmetyinen H. Charge-transfer emission of compact porphyrin-fullerene dyad analyzed by Marcus theory of electron-transfer. Spectrochim Acta A Mol Biomol Spectrosc 2001; 57:2229-2244. [PMID: 11603840 DOI: 10.1016/s1386-1425(01)00496-6] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A porphyrin-fullerene dyad, which is characterized by a close proximity of the porphyrin donor and the fullerene acceptor, was found to undergo a photoinduced electron transfer both in solutions and in solid films. Near-infrared charge-transfer (CT) emission was observed and analyzed in frame of the semi-classical Marcus electron-transfer theory yielding values for the reaction free energy, -deltaG degrees = 1.75 eV, the internal reorganization energy, lambdav = 0.05 eV, and the donor-acceptor vibrational energy, hv(v) = 0.14 eV, both in solution and in solid film. The influence of the environment on the CT properties of the dyad is described by a single parameter, the outer-sphere reorganization energy, lambdas, which varies from 0.05 eV in non-polar solvents and films to 0.13 eV in solvents of moderate polarity. At low temperatures (T< 200 K), the CT emission consists of distinct bands shifted from each other by value hv(v). This is the first direct observation of the vibrational frequencies of a porphyrin-fullerene donor-acceptor system.
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Affiliation(s)
- V Vehmanen
- Institute of Materials Chemistry, Tampere University of Technology, Finland.
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48
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Tkachenko NV, Guenther C, Imahori H, Tamaki K, Sakata Y, Fukuzumi S, Lemmetyinen H. Near infra-red emission of charge-transfer complexes of porphyrin–fullerene films. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00765-x] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Prister BS, Novikova NK, Tkachenko NV, Nagovisyna LI, Berezhnaia TI. [Ways to reduce a collective dose of internal radiation in pollution of agricultural fields]. Gig Sanit 1990:55-7. [PMID: 2283069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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50
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Kanevskaia SA, Kravets AS, Slesarenko EV, Shevchenko VI, Tkachenko NV. [Folic acid in the combined treatment of patients with disseminated sclerosis and chronic gastritis]. Vrach Delo 1990:96-7. [PMID: 2275187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Folic acid was used for the complex treatment of patients with multiple sclerosis. The doses employed were 200-300 mcg daily. It was established that folic acid improved the reparative processes in the gastric mucosa and produced a pronounced therapeutic effect on the neurological status of the patients, favoured improvement of their general condition.
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