1
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Lu T. Theoretical Prediction and Comprehensive Characterization of an All-Nitrogenatomic Ring, Cyclo[18]Nitrogen (N 18). Chemphyschem 2024:e202400377. [PMID: 38722092 DOI: 10.1002/cphc.202400377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/07/2024] [Indexed: 06/20/2024]
Abstract
The cyclic molecule cyclo[18]carbon composed of 18 carbon atoms has been observed in condensed phase experiment in recent years and has attracted great attention. Through state-of-art quantum chemistry calculation, this study found that 18 nitrogen atoms can also form a macrocyclic system, cyclo[18]nitrogen (N18), though its lifetime is very short at room temperature and can only exist for a relatively long time at very low temperatures. We comprehensively theoretically studied properties of N18, including geometric configurations, thermal decomposition mechanism and rate, molecular dynamics behavior, energetic properties, vibrational and electronic spectra. We also discussed in depth the electronic structure of N18, including nature of the N-N bonds, lone-pairs, charge distribution characteristics, electronic delocalization, and aromaticity. This work is not only the first exploration of the macrocyclic N18 molecule, but also the first time to systematically examine a very long-chain substance fully composed of nitrogen atoms in isolated state.
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Affiliation(s)
- Tian Lu
- Beijing Kein Research Center for Natural Sciences, Beijing, 100024, P. R. China
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2
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Yao C, Dou KL, Yang Y, Li C, Sun CQ, Sun J, He C, Zhang L, Pang S. Nonbonding Electron Delocalization Stabilizes the Flexible N 8 Molecular Assembly. J Phys Chem Lett 2024; 15:1507-1514. [PMID: 38299556 DOI: 10.1021/acs.jpclett.3c03285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Electron delocalization has an important impact on the physical properties of condensed materials. However, the L-electron delocalization in inorganic, especially nitrogen, compounds needs exploitation to improve the energy efficiency, safety, and environmental sustainability of high-energy-density materials (HEDMs). This Letter presents an intriguing N8 molecule, ingeniously utilizing nitrogen's L-electron delocalization. The molecule, exhibiting a unique lollipop-shaped conformation, can fold at various angles with very low energy barriers, self-assembling into environmentally stable, all-nitrogen crystals. These crystals demonstrate unparalleled stability, high energy density, low mechanical sensitivity, and optimal electronic thermal conductivity, outperforming existing HEDMs. The remarkable properties of these designed materials are attributed to two distinct delocalized systems within nitrogen's L-shell: π- and lone pair σ-electrons, which not only stabilize the molecular structure but also facilitate interconnected 3D networks of intermolecular nonbonding interactions. This work might pave the way to the experimental synthesis of environmentally stable all-nitrogen solids.
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Affiliation(s)
- Chuang Yao
- Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM) of Chongqing, School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China
| | - Kai-Le Dou
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Yezi Yang
- Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM) of Chongqing, School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China
| | - Chongyang Li
- College of Mechanical Engineering and Automation, Chongqing Industry Polytechnic College, Chongqing 401120, China
| | - Chang Q Sun
- Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Jian Sun
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Chunlin He
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Lei Zhang
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Siping Pang
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
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3
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Lin S, Xu M, Liang Y, Yuan X, Zhang Y, Wang F, Hao J, Li Y. Ambient-Pressure Recoverable Polynitrogen Solids Assembled by Pentazolate Rings with High Energy Density. Inorg Chem 2022; 61:15532-15539. [PMID: 36126121 DOI: 10.1021/acs.inorgchem.2c02240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Crystal structure predictions and first-principles calculations were used to predict three polynitrogen solids (aP8-N, aP12-N, and oP24-N) that possess competitive enthalpies as compared to the synthesized open-chain N8 phase at pressures in the range of 0-60 GPa. aP8-N, aP12-N, and oP24-N contain edge-shared, N2-linked, and N-bridged pentazolate rings and form molecular N8, molecular N12, and quasi-one-dimensional N∞ ribbons, respectively. The calculations of formation enthalpies show that the three polynitrogen solids can be synthesized by compressing cyclo-N5 salts in hydrogen-saturated environments. Molecular simulations suggest that the three polynitrogen solids have the ability of quench recoverability under ambient conditions once being synthesized at high pressure. With estimated energy densities in the range of 5.6-6.5 kJ/g, these three polynitrogen phases show notable promise for applications as high-energy-density materials.
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Affiliation(s)
- Shuyi Lin
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Meiling Xu
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Yiwei Liang
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Xuanhao Yuan
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Yiming Zhang
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Feilong Wang
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Jian Hao
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Yinwei Li
- Laboratory of Quantum Functional Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
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4
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Benchafia EM, Wang X, Iqbal Z, Abedrabbo S. A polymeric nitrogen N[Formula: see text]-N[Formula: see text] system with enhanced stability at low pressure. Sci Rep 2022; 12:15312. [PMID: 36096907 PMCID: PMC9468181 DOI: 10.1038/s41598-022-19080-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 08/24/2022] [Indexed: 12/03/2022] Open
Abstract
Postulated in 1992 and synthesized in 2004 above 2000 K and 110 GPa, the singly-bonded nitrogen cubic gauche crystal (cg-PN) is still considered to be the ultimate high energy density material (HEDM). The search however has continued for a method to synthesize cg-PN at more ambient conditions or find HEDMs which can be synthesized at lower pressure and temperature. Here, using ab initio evolutionary crystal prediction techniques, a simpler nitrogen-based molecular crystal consisting of N[Formula: see text] and N[Formula: see text] molecules is revealed to be a more favorable polynitrogen at lower pressures. The energetic gain of 534 meV/atom over cg-PN and 138 meV/atom over the N[Formula: see text] molecular crystal at zero pressure makes the N[Formula: see text]-N[Formula: see text] system more appealing. Dynamical and mechanical stabilities are investigated at 5 and 0 GPa, and vibrational frequencies are assessed for its Raman and IR spectra. The prospects of an experimental synthesis of the N[Formula: see text]-N[Formula: see text] polymeric system compared to cg-PN is higher because the C[Formula: see text] symmetry of N[Formula: see text] within this crystal would be easier to target from the readily available N[Formula: see text] azides and the observed N[Formula: see text] and N[Formula: see text] radicals.
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Affiliation(s)
| | - Xianqin Wang
- Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, Newark, NJ 07102 USA
| | - Zafar Iqbal
- Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, Newark, NJ 07102 USA
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102-1982 USA
| | - Sufian Abedrabbo
- Department of Physics, Khalifa University, Abu Dhabi, UAE
- Department of Physics, University of Jordan, Amman, Jordan
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5
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Aslandukov A, Trybel F, Aslandukova A, Laniel D, Fedotenko T, Khandarkhaeva S, Aprilis G, Giacobbe C, Lawrence Bright E, Abrikosov IA, Dubrovinsky L, Dubrovinskaia N. Anionic N
18
Macrocycles and a Polynitrogen Double Helix in Novel Yttrium Polynitrides YN
6
and Y
2
N
11
at 100 GPa. Angew Chem Int Ed Engl 2022; 61:e202207469. [PMID: 35726633 PMCID: PMC9546263 DOI: 10.1002/anie.202207469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Andrey Aslandukov
- Material Physics and Technology at Extreme Conditions Laboratory of Crystallography University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
- Bayerisches Geoinstitut University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
| | - Florian Trybel
- Department of Physics Chemistry and Biology (IFM) Linköping University 58183 Linköping Sweden
| | - Alena Aslandukova
- Bayerisches Geoinstitut University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
| | - Dominique Laniel
- Material Physics and Technology at Extreme Conditions Laboratory of Crystallography University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
- Centre for Science at Extreme Conditions and School of Physics and Astronomy University of Edinburgh Edinburgh EH9 3FD UK
| | - Timofey Fedotenko
- Photon Science, Deutsches Elektronen-Synchrotron Notkestrasse 85 22607 Hamburg Germany
| | - Saiana Khandarkhaeva
- Material Physics and Technology at Extreme Conditions Laboratory of Crystallography University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
| | - Georgios Aprilis
- European Synchrotron Radiation Facility BP 220 38043 Grenoble Cedex France
| | - Carlotta Giacobbe
- European Synchrotron Radiation Facility BP 220 38043 Grenoble Cedex France
| | | | - Igor A. Abrikosov
- Department of Physics Chemistry and Biology (IFM) Linköping University 58183 Linköping Sweden
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme Conditions Laboratory of Crystallography University of Bayreuth Universitätstrasse 30 95440 Bayreuth Germany
- Department of Physics Chemistry and Biology (IFM) Linköping University 58183 Linköping Sweden
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6
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Aslandukov A, Trybel F, Aslandukova A, Laniel D, Fedotenko T, Khandarkhaeva S, Aprilis G, Giacobbe C, Lawrence Bright E, Abrikosov IA, Dubrovinsky L, Dubrovinskaia N. Anionic N18 Macrocycles and a Polynitrogen Double Helix in Novel Yttrium Polynitrides YN6 and Y2N11 at 100 GPa. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andrey Aslandukov
- University of Bayreuth: Universitat Bayreuth Laboratory of Crystallography Universitätstrasse 30 95440 Bayreuth GERMANY
| | - Florian Trybel
- Linkopings universitet Department of Physics, Chemistry and Biology (IFM) SWEDEN
| | - Alena Aslandukova
- University of Bayreuth: Universitat Bayreuth Bayerisches Geoinstitut GERMANY
| | - Dominique Laniel
- The University of Edinburgh Centre for Science at Extreme Conditions and School of Physics and Astronomy UNITED KINGDOM
| | - Timofey Fedotenko
- DESY: Deutsches Elektronen-Synchrotron Photon Science, Deutsches Elektronen-Synchrotron GERMANY
| | - Saiana Khandarkhaeva
- University of Bayreuth: Universitat Bayreuth Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography GERMANY
| | | | | | | | - Igor A. Abrikosov
- Linköping University: Linkopings universitet Department of Physics, Chemistry and Biology (IFM) SWEDEN
| | - Leonid Dubrovinsky
- University of Bayreuth: Universitat Bayreuth Bayerisches Geoinstitut GERMANY
| | - Natalia Dubrovinskaia
- University of Bayreuth: Universitat Bayreuth Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography GERMANY
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7
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Grishakov KS, Degtyarenko NN. Low pressure metastable single-bonded solid nitrogen phases. Phys Chem Chem Phys 2022; 24:8351-8360. [PMID: 35332346 DOI: 10.1039/d2cp00620k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Within the framework of the density functional theory, the possibility of the formation of single-bonded solid atomic nitrogen phases as a result of adiabatic compression of molecular and cluster nitrogen structures at zero temperature has been studied. It has been demonstrated that nitrogen clusters N8(C2v)-B, which are theoretically predicted as one of the promising candidates for high energy density materials, can transform under compression into a solid atomic phase with crystal lattice symmetry P21. The P21 phase is dynamically stable under decompression to zero pressure. It is shown that the ε-N2 molecular phase transforms under compression into a solid atomic phase with R3̄c symmetry, and retains a vibrationally stable crystal structure when the pressure is reduced to 30 GPa, transforming into a stable cluster form at lower pressures. The atoms in the P21 and R3̄c solid atomic phases are linked by single bonds; therefore, these structures can store a large amount of energy ≈1.4 eV per atom. A detailed comparison of the properties of new P21 and R3̄c solid atomic phases with other nitrogen crystal structures that are dynamically stable at low pressures has been carried out.
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Affiliation(s)
- Konstantin S Grishakov
- National Research Nuclear University "MEPhI", Kashirskoe Shosse 31, Moscow 115409, Russia. .,Research Institute for the Development of Scientific and Educational Potential of Youth, 14/55 Aviatorov St., Moscow, 119620, Russia
| | - Nikolay N Degtyarenko
- National Research Nuclear University "MEPhI", Kashirskoe Shosse 31, Moscow 115409, Russia.
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8
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Molecular and Electronic Structures of Neutral Polynitrogens: Review on the Theory and Experiment in 21st Century. Int J Mol Sci 2022; 23:ijms23052841. [PMID: 35269983 PMCID: PMC8911370 DOI: 10.3390/ijms23052841] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/27/2022] [Accepted: 03/02/2022] [Indexed: 02/01/2023] Open
Abstract
The data on the existence and physicochemical characteristics of uncharged single element chemical compounds formed by nitrogen atoms and containing more than two nuclides of this element (from N4 to N120, oligomeric and polymeric polynitrogens) have been systematized and generalized. It has been noticed that these data have a predominantly predictive character and were obtained mainly using quantum chemical calculations of various levels (HF, DFT, MP, CCSD etc.). The possibility of the practical application of these single element compounds has been considered. The review mainly covers articles published in the last 25 years. The bibliography contains 128 references.
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9
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Gale A, Hruska E, Liu F. Quantum chemistry for molecules at extreme pressure on graphical processing units: Implementation of extreme-pressure polarizable continuum model. J Chem Phys 2021; 154:244103. [PMID: 34241353 DOI: 10.1063/5.0056480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Pressure plays essential roles in chemistry by altering structures and controlling chemical reactions. The extreme-pressure polarizable continuum model (XP-PCM) is an emerging method with an efficient quantum mechanical description of small- and medium-sized molecules at high pressure (on the order of GPa). However, its application to large molecular systems was previously hampered by a CPU computation bottleneck: the Pauli repulsion potential unique to XP-PCM requires the evaluation of a large number of electric field integrals, resulting in significant computational overhead compared to the gas-phase or standard-pressure polarizable continuum model calculations. Here, we exploit advances in graphical processing units (GPUs) to accelerate the XP-PCM-integral evaluations. This enables high-pressure quantum chemistry simulation of proteins that used to be computationally intractable. We benchmarked the performance using 18 small proteins in aqueous solutions. Using a single GPU, our method evaluates the XP-PCM free energy of a protein with over 500 atoms and 4000 basis functions within half an hour. The time taken by the XP-PCM-integral evaluation is typically 1% of the time taken for a gas-phase density functional theory (DFT) on the same system. The overall XP-PCM calculations require less computational effort than that for their gas-phase counterpart due to the improved convergence of self-consistent field iterations. Therefore, the description of the high-pressure effects with our GPU-accelerated XP-PCM is feasible for any molecule tractable for gas-phase DFT calculation. We have also validated the accuracy of our method on small molecules whose properties under high pressure are known from experiments or previous theoretical studies.
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Affiliation(s)
- Ariel Gale
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Eugen Hruska
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Fang Liu
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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10
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Liu Y, Du H, Fang L, Sun F, Su H, Ge Z, Guo W, Zhu J. Pressure-driven electronic phase transition in the high-pressure phase of nitrogen-rich 1H-tetrazoles. RSC Adv 2021; 11:21507-21513. [PMID: 35478815 PMCID: PMC9034126 DOI: 10.1039/d1ra00522g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 06/07/2021] [Indexed: 11/21/2022] Open
Abstract
High-energy-density materials (HEDMs) require new design rules collected from experimental and theoretical results and a proposed mechanism. One of the targeted systems is the nitrogen-rich compounds as precursors for possible polymeric nitrogen or its counterpart in a reasonable pressure range. 1H-tetrazole (CH2N4) with hydrogen bonds was studied under pressure by both diffraction and spectroscopy techniques. The observed crystal structure phase transition and hydrogen bond-assisted electronic structure anomaly were confirmed by first-principles calculation. The rearrangement of the hydrogen bonds under pressure elucidates the bonding interactions of the nitrogen-rich system in local 3D chemical environments, allowing the discovery and design of a feasible materials system to make new-generation high-energy materials. Combined high pressure in situ spectra with first-principles calculations, a possible hydrogen-bond assisted phase transition was proposed in tetrazole.![]()
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Affiliation(s)
- Ying Liu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China .,Department of Physics, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology Shenzhen 518055 China
| | - Huifang Du
- Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Leiming Fang
- Key Laboratory for Neutron Physics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics Mianyang 621900 China
| | - Fei Sun
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) Beijing 100094 China
| | - Haipeng Su
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Zhongxue Ge
- Xi'an Modern Chemistry Research Institute Xi'an 710065 China
| | - Wei Guo
- Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Jinlong Zhu
- Department of Physics, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology Shenzhen 518055 China .,Center for High Pressure Science and Technology Advanced Research (HPSTAR) Beijing 100094 China
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11
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Gomes ACR, Silva MX, Galvão BRL. Stability of neutral molecular polynitrogens: energy content and decomposition mechanisms. RSC Adv 2021; 11:21567-21578. [PMID: 35478819 PMCID: PMC9034165 DOI: 10.1039/d1ra03259c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 05/19/2021] [Indexed: 11/21/2022] Open
Abstract
The potential application of all-nitrogen molecules as high energy density materials (HEDMs) has been attracting considerable scientific effort. If stable enough to be synthesized and stored, these systems may be used as a green source of energy. However, it is very difficult to obtain these structures under mild experimental conditions. Theoretical chemistry may aid in the search for polynitrogens that are more likely to have experimental usability. The barriers towards decomposition are an effective way to assess their stability, but these have not been thoroughly studied. Most of the previous effort in this direction focus on a single Nx case, each employing different accuracy levels, and the decomposition of caged structures has been little explored. Here we explore the stability and decomposition of several neutral molecular polynitrogens of different sizes and shapes using a common and accurate theoretical framework in order to compare among them, search for patterns and identify potential candidates for synthesis. We focus especially on new caged geometries, and our results indicate that the prismatic ones can be expected to present higher energy densities and be very stable with respect to unimolecular decomposition. It is shown that the energy content can be clearly stratified between chain, ring, cage and prismatic cage structures. All-nitrogen molecules may provide green energy sources, releasing large amounts of energy without polluting byproducts. Here we predict the stability towards unimolecular decomposition of several structures and discuss their unusual chemistry.![]()
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Affiliation(s)
- A C R Gomes
- Centro Federal de Educação Tecnológica de Minas Gerais, CEFET-MG Av. Amazonas 5253 (30421-169) Belo Horizonte Minas Gerais Brazil
| | - M X Silva
- Programa de Pós-Graduação em Modelagem Matemática e Computacional, Centro Federal de Educação Tecnológica de Minas Gerais, CEFET-MG Av. Amazonas 7675 (30510-000) Belo Horizonte Minas Gerais Brazil
| | - B R L Galvão
- Centro Federal de Educação Tecnológica de Minas Gerais, CEFET-MG Av. Amazonas 5253 (30421-169) Belo Horizonte Minas Gerais Brazil
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12
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Gerber RB. My Trajectory in Molecular Reaction Dynamics and Spectroscopy. Annu Rev Phys Chem 2021; 72:1-34. [PMID: 33276702 DOI: 10.1146/annurev-physchem-090519-124238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This is the story of a career in theoretical chemistry during a time of dramatic changes in the field due to phenomenal growth in the availability of computational power. It is likewise the story of the highly gifted graduate students and postdoctoral fellows that I was fortunate to mentor throughout my career. It includes reminiscences of the great mentors that I had and of the exciting collaborations with both experimentalists and theorists on which I built much of my research. This is an account of the developments of exciting scientific disciplines in which I was involved: vibrational spectroscopy, molecular reaction mechanisms and dynamics, e.g., in atmospheric chemistry, and the prediction of new, exotic molecules, in particular noble gas molecules. From my very first project to my current work, my career in science has brought me the excitement and fascination of research. What a wonderful pursuit!
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Affiliation(s)
- Robert Benny Gerber
- The Fritz Haber Research Center and Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; .,Department of Chemistry, University of California, Irvine, California 92697, USA
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13
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Zhang G, Zhang H, Ninet S, Zhu H, Beneut K, Liu C, Mezouar M, Gao C, Datchi F. Transformation of Ammonium Azide at High Pressure and Temperature. MATERIALS 2020; 13:ma13184102. [PMID: 32942780 PMCID: PMC7560398 DOI: 10.3390/ma13184102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/06/2020] [Accepted: 09/11/2020] [Indexed: 11/16/2022]
Abstract
The compression of ammonium azide (AA) has been considered to be a promising route for producing high energy-density polynitrogen compounds. So far though, there is no experimental evidence that pure AA can be transformed into polynitrogen materials under high pressure at room temperature. We report here on high pressure (P) and temperature (T) experiments on AA embedded in N2 and on pure AA in the range 0-30 GPa, 300-700 K. The decomposition of AA into N2 and NH3 was observed in liquid N2 around 15 GPa-700 K. For pressures above 20 GPa, our results show that AA in N2 transforms into a new crystalline compound and solid ammonia when heated above 620 K. This compound is stable at room temperature and on decompression down to at least 7.0 GPa. Pure AA also transforms into a new compound at similar P-T conditions, but the product is different. The newly observed phases are studied by Raman spectroscopy and X-ray diffraction and compared to nitrogen and hydronitrogen compounds that have been predicted in the literature. While there is no exact match with any of them, similar vibrational features are found between the product that was obtained in AA + N2 with a polymeric compound of N9H formula.
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Affiliation(s)
- Guozhao Zhang
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4 Place Jussieu, F-75005 Paris, France; (H.Z.); (S.N.); (K.B.)
| | - Haiwa Zhang
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4 Place Jussieu, F-75005 Paris, France; (H.Z.); (S.N.); (K.B.)
| | - Sandra Ninet
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4 Place Jussieu, F-75005 Paris, France; (H.Z.); (S.N.); (K.B.)
| | - Hongyang Zhu
- School of Physics and Electronic Engineering, Linyi University, Linyi 276005, China;
| | - Keevin Beneut
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4 Place Jussieu, F-75005 Paris, France; (H.Z.); (S.N.); (K.B.)
| | - Cailong Liu
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physical Science and Information Technology of Liaocheng University, Liaocheng 252059, China;
| | - Mohamed Mezouar
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble CEDEX, France;
| | - Chunxiao Gao
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
- Correspondence: (C.G.); (F.D.)
| | - Frédéric Datchi
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4 Place Jussieu, F-75005 Paris, France; (H.Z.); (S.N.); (K.B.)
- Correspondence: (C.G.); (F.D.)
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Gorn MV, Gritsan NP, Goldsmith CF, Kiselev VG. Thermal Stability of Bis-Tetrazole and Bis-Triazole Derivatives with Long Catenated Nitrogen Chains: Quantitative Insights from High-Level Quantum Chemical Calculations. J Phys Chem A 2020; 124:7665-7677. [DOI: 10.1021/acs.jpca.0c04985] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Margarita V. Gorn
- Novosibirsk State University, 1 Pirogova Street, Novosibirsk 630090, Russia
- Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya Street, Novosibirsk 630090, Russia
| | - Nina P. Gritsan
- Novosibirsk State University, 1 Pirogova Street, Novosibirsk 630090, Russia
- Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya Street, Novosibirsk 630090, Russia
| | - C. Franklin Goldsmith
- Brown University, School of Engineering, 184 Hope Street, Providence, Rhode Island 02912, United States
| | - Vitaly G. Kiselev
- Novosibirsk State University, 1 Pirogova Street, Novosibirsk 630090, Russia
- Institute of Chemical Kinetics and Combustion SB RAS, 3 Institutskaya Street, Novosibirsk 630090, Russia
- Brown University, School of Engineering, 184 Hope Street, Providence, Rhode Island 02912, United States
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15
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Bondarchuk SV. Bipentazole (N 10): A Low-Energy Molecular Nitrogen Allotrope with High Intrinsic Stability. J Phys Chem Lett 2020; 11:5544-5548. [PMID: 32575989 DOI: 10.1021/acs.jpclett.0c01542] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this Letter, we report a crystal structure prediction and characterization of a molecular nitrogen allotrope N10 (bipentazole) using state-of-the-art computational methods. To date, in the form of a P21 space group crystal, this allotrope is the most stable predicted form of nitrogen, other than N2, in the pressure range 0-42 GPa. Its metastability at ambient conditions was justified using phonon dispersion and mechanical properties calculations as well as ab initio molecular dynamics simulations. Due to a high intrinsic stability caused by aromaticity, bipentazole may appear to be the first nitrogen allotrope stable enough for a large-scale synthesis at ambient conditions. The calculations of propulsive characteristics revealed that bipentazole is an excellent "green" energetic material. A potential strategy for the synthesis of this compound is offered and rationalized. The unique electronic structure of bipentazole makes it a strongly electrophilic all-nitrogen reagent, which can exhibit unusual chemistry.
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Affiliation(s)
- Sergey V Bondarchuk
- Department of Chemistry and Nanomaterials Science, Bogdan Khmelnitsky Cherkasy National University, blvd. Shevchenko 81, 18031 Cherkasy, Ukraine
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16
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Bondarchuk SV. Beyond molecular nitrogen: revelation of two ambient-pressure metastable single- and double-bonded nitrogen allotropes built from three-membered rings. Phys Chem Chem Phys 2019; 21:22930-22938. [PMID: 31596290 DOI: 10.1039/c9cp04288a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we present a crystal structure prediction and characterization for two novel single- and double-bonded nitrogen allotropes (denoted as CubN and DobN) bearing three-membered nitrogen cycles. These materials are ambient-pressure metastable robust solids with strong cohesive energies. Due to the presence of strained nitrogen cycles, these allotropes are high-lying phases, which retain high energy densities at least up to 200 GPa, when CubN becomes lower in energy than ζ-N2. The studied allotropes are indirect wide-bandgap semiconductors. A detailed spectral characterization of these materials is also presented herein. Due to their extremely high heats of formation and crystal densities, CubN and DobN demonstrate excellent detonation properties that are comparable to those of previously reported phases (cg-N and TrigN). Propulsive properties (including specific impulse and characteristic velocity) of CubN and DobN as solid monopropellants were also estimated. Thus, if synthesized, the present nitrogen allotropes will have great potential for practical applications and achieving fundamental knowledge about nitrogen as a chemical element.
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Affiliation(s)
- Sergey V Bondarchuk
- Department of Chemistry and Nanomaterials Science, Bogdan Khmelnitsky Cherkasy National University, blvd. Shevchenko 81, 18031 Cherkasy, Ukraine.
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Zakai I, Grinstein D, Welner S, Gerber RB. Structures, Stability, and Decomposition Dynamics of the Polynitrogen Molecule N5+B(N3)4– and Its Dimer [N5+]2[B(N3)4–]2. J Phys Chem A 2019; 123:7384-7393. [DOI: 10.1021/acs.jpca.9b03704] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Itai Zakai
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University, Jerusalem 9190401, Israel
| | - Dan Grinstein
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University, Jerusalem 9190401, Israel
| | - Shmuel Welner
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University, Jerusalem 9190401, Israel
| | - R. Benny Gerber
- Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University, Jerusalem 9190401, Israel
- Department of Chemistry, University of California, Irvine, California 92697, United States
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