1
|
Bhullar M, Bai Z, Akinpelu A, Yao Y. Phase Transition in Silicon from Machine Learning Informed Metadynamics. Chemphyschem 2024; 25:e202400090. [PMID: 38649321 DOI: 10.1002/cphc.202400090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 04/20/2024] [Accepted: 04/22/2024] [Indexed: 04/25/2024]
Abstract
Investigating reconstructive phase transitions in large-sized systems requires a highly efficient computational framework with computational cost proportional to the system size. Traditionally, widely used frameworks such as density functional theory (DFT) have been prohibitively expensive for extensive simulations on large systems that require long-time scales. To address this challenge, this study employed well-trained machine learning potential to simulate phase transitions in a large-size system. This work integrates the metadynamics simulation approach with machine learning potential, specifically deep potential, to enhance computational efficiency and accelerate the study of phase transition and consequent development of grains and dislocation defects in a system. The new method is demonstrated using the phase transitions of bulk silicon under high pressure. This approach has revealed the transition path and formation of polycrystalline silicon systems under specific stress conditions, demonstrating the effectiveness of deep potential-driven metadynamics simulations in gaining insights into complex material behaviors in large-sized systems.
Collapse
Affiliation(s)
- Mangladeep Bhullar
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
| | - Zihao Bai
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
- Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, 53706, United States
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin, 53706, United States
| | - Akinwumi Akinpelu
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
| | - Yansun Yao
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
| |
Collapse
|
2
|
Sukserm A, Ceppatelli M, Serrano-Ruiz M, Scelta D, Dziubek K, Morana M, Bini R, Peruzzini M, Bovornratanaraks T, Pinsook U, Scandolo S. Stability, Chemical Bonding, and Electron Lone Pair Localization in AsN at High Pressure by Density Functional Theory Calculations. Inorg Chem 2024; 63:8142-8154. [PMID: 38640445 DOI: 10.1021/acs.inorgchem.4c00342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
The covalent bonding framework of crystalline single-bonded cubic AsN, recently synthesized under high pressure and high temperature conditions in a laser-heated diamond anvil cell, is here studied by means of density functional theory calculations and compared to single crystal X-ray diffraction data. The precise localization of the nonbonding electron lone pairs and the determination of their distances and orientations are related to the presence of characteristic structural motifs and space regions of the unit cell dominated by repulsive electronic interactions, with the relative orientation of the electron lone pairs playing a key role in minimizing the energy of the structure. We find that the vibrational modes associated with the expression of the lone pairs are strongly localized, an observation that may have implications for the thermal conductivity of the compound. The results indicate the thermodynamic stability of the experimentally observed structure of AsN above ∼17 GPa, provide a detailed insight into the nature of the chemical bonding network underlying the formation of this compound, and open new perspectives to the design and high pressure synthesis of new pnictogen-based advanced materials for potential applications of energetic and technological relevance.
Collapse
Affiliation(s)
- Akkarach Sukserm
- Extreme Conditions Physics Research Laboratory and Center of Excellence in Physics of Energy Materials(CE:PEM), Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Matteo Ceppatelli
- ICCOM-CNR, Institute of Chemistry of OrganoMetallic Compounds, National Research Council of Italy, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Firenze, Italy
- LENS, European Laboratory for Non-linear Spectroscopy, Via N. Carrara 1, I-50019, Sesto Fiorentino, FirenzeItaly
| | - Manuel Serrano-Ruiz
- ICCOM-CNR, Institute of Chemistry of OrganoMetallic Compounds, National Research Council of Italy, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Firenze, Italy
| | - Demetrio Scelta
- ICCOM-CNR, Institute of Chemistry of OrganoMetallic Compounds, National Research Council of Italy, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Firenze, Italy
- LENS, European Laboratory for Non-linear Spectroscopy, Via N. Carrara 1, I-50019, Sesto Fiorentino, FirenzeItaly
| | - Kamil Dziubek
- Institut für Mineralogie und Kristallographie, Universität Wien, Josef-Holaubek-Platz 2, A-1090 Wien, Austria
| | - Marta Morana
- Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via La Pira 4, Firenze I-50121, Italy
| | - Roberto Bini
- ICCOM-CNR, Institute of Chemistry of OrganoMetallic Compounds, National Research Council of Italy, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Firenze, Italy
- LENS, European Laboratory for Non-linear Spectroscopy, Via N. Carrara 1, I-50019, Sesto Fiorentino, FirenzeItaly
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, I-50019 Sesto Fiorentino, Firenze, Italy
| | - Maurizio Peruzzini
- ICCOM-CNR, Institute of Chemistry of OrganoMetallic Compounds, National Research Council of Italy, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Firenze, Italy
| | - Thiti Bovornratanaraks
- Extreme Conditions Physics Research Laboratory and Center of Excellence in Physics of Energy Materials(CE:PEM), Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Udomsilp Pinsook
- Department of Physics, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, 10330 Bangkok, Thailand
| | - Sandro Scandolo
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, I-34151 Trieste, Italy
| |
Collapse
|
3
|
Laniel D, Trybel F, Aslandukov A, Spender J, Ranieri U, Fedotenko T, Glazyrin K, Bright EL, Chariton S, Prakapenka VB, Abrikosov IA, Dubrovinsky L, Dubrovinskaia N. Title: Structure determination of ζ-N 2 from single-crystal X-ray diffraction and theoretical suggestion for the formation of amorphous nitrogen. Nat Commun 2023; 14:6207. [PMID: 37798268 PMCID: PMC10556017 DOI: 10.1038/s41467-023-41968-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 09/25/2023] [Indexed: 10/07/2023] Open
Abstract
The allotropy of solid molecular nitrogen is the consequence of a complex interplay between fundamental intermolecular as well as intramolecular interactions. Understanding the underlying physical mechanisms hinges on knowledge of the crystal structures of these molecular phases. That is especially true for ζ-N2, key to shed light on nitrogen's polymerization. Here, we perform single-crystal X-ray diffraction on laser-heated N2 samples at 54, 63, 70 and 86 GPa and solve and refine the hitherto unknown structure of ζ-N2. In its monoclinic unit cell (space group C2/c), 16 N2 molecules are arranged in a configuration similar to that of ε-N2. The structure model provides an explanation for the previously identified Raman and infrared lattice and vibrational modes of ζ-N2. Density functional theory calculations give an insight into the gradual delocalization of electronic density from intramolecular bonds to intermolecular space and suggest a possible pathway towards nitrogen's polymerization.
Collapse
Affiliation(s)
- Dominique Laniel
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, EH9 3FD, Edinburgh, UK.
| | - Florian Trybel
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83, Linköping, Sweden.
| | - Andrey Aslandukov
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440, Bayreuth, Germany
- Bayerisches Geoinstitut, University of Bayreuth, 95440, Bayreuth, Germany
| | - James Spender
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, EH9 3FD, Edinburgh, UK
| | - Umbertoluca Ranieri
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, EH9 3FD, Edinburgh, UK
| | - Timofey Fedotenko
- Photon Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607, Hamburg, Germany
| | - Konstantin Glazyrin
- Photon Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607, Hamburg, Germany
| | | | - Stella Chariton
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL, 60637, USA
| | - Vitali B Prakapenka
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL, 60637, USA
| | - Igor A Abrikosov
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83, Linköping, Sweden
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, University of Bayreuth, 95440, Bayreuth, Germany
| | - Natalia Dubrovinskaia
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83, Linköping, Sweden
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440, Bayreuth, Germany
| |
Collapse
|
4
|
Yao Y. Theoretical methods for structural phase transitions in elemental solids at extreme conditions: statics and dynamics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:363001. [PMID: 35724660 DOI: 10.1088/1361-648x/ac7a82] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
In recent years, theoretical studies have moved from a traditionally supporting role to a more proactive role in the research of phase transitions at high pressures. In many cases, theoretical prediction leads the experimental exploration. This is largely owing to the rapid progress of computer power and theoretical methods, particularly the structure prediction methods tailored for high-pressure applications. This review introduces commonly used structure searching techniques based on static and dynamic approaches, their applicability in studying phase transitions at high pressure, and new developments made toward predicting complex crystalline phases. Successful landmark studies for each method are discussed, with an emphasis on elemental solids and their behaviors under high pressure. The review concludes with a perspective on outstanding challenges and opportunities in the field.
Collapse
Affiliation(s)
- Yansun Yao
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
| |
Collapse
|
5
|
Williams AS, Nguyen Cong K, Gonzalez JM, Oleynik II. Crystal structure of silver pentazolates AgN 5 and AgN 6. Dalton Trans 2021; 50:16364-16370. [PMID: 34734596 DOI: 10.1039/d1dt02319e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Silver pentazolate, a high energy density compound containing the cyclo-N5- anion, has recently been synthesized under ambient conditions. However, due to high sensitivity to irradiation, its crystal structure has not been determined. In this work, silver-nitrogen crystalline compounds under ambient conditions and at high pressures, up to 100 GPa, are predicted and characterized by performing first-principles evolutionary crystal structure searching with variable stoichiometry. It is found that newly discovered AgN5 and AgN6 are the only thermodynamically stable silver-nitrogen compounds at pressures between 42 and 80 GPa. In contrast to AgN5, the pentazolate AgN6 compound contains N2 diatomic molecules in addition to cyclo-N5-. These AgN5 and AgN6 crystals are metastable under ambient conditions with positive formation enthalpies of 54.95 kJ mol-1 and 46.24 kJ mol-1, respectively. The underlying cause of the stability of cyclo-N5- silver pentazolates is the enhanced aromaticity enabled by the charge transfer from silver atoms to nitrogen rings. To aid in the experimental identification of these materials, calculated Raman spectra are reported at ambient pressure: the frequencies of N5- vibrational modes of AgN5 are in good agreement with those measured in the experiment.
Collapse
Affiliation(s)
- Ashley S Williams
- Department of Physics, University of South Florida, Tampa, FL 33620, USA.
| | - Kien Nguyen Cong
- Department of Physics, University of South Florida, Tampa, FL 33620, USA.
| | - Joseph M Gonzalez
- Department of Physics, University of South Florida, Tampa, FL 33620, USA.
| | - Ivan I Oleynik
- Department of Physics, University of South Florida, Tampa, FL 33620, USA.
| |
Collapse
|
6
|
Bai ZX, Jiang CL, Zhu SH, Zhong M, Zhang MJ, Liu FS, Tang B, Liu QJ, Chang XH. First-principles study of the structural phase transition process of solid nitrogen under pressure. J Mol Model 2021; 27:307. [PMID: 34591190 DOI: 10.1007/s00894-021-04919-6] [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: 06/28/2021] [Accepted: 09/16/2021] [Indexed: 11/27/2022]
Abstract
Due to the diversity of solid nitrogen structure, its phase transition has been a hot topic for many scientists. Herein, we first studied the structural softening of rhombohedral solid nitrogen under pressure using first-principles calculations. Then, a new criterion, Egret criterion, was proposed to predict the whole process from beginning to end of structural phase transition of solid nitrogen. Based on the discussion of acoustic phonons, we concluded that the phase transition of rhombohedral solid nitrogen starts from k-point F along the [- 1, - 1, 0] direction in a-axis, and the structural phase transition velocity is slow. Also, we use the Egret criterion proposed by us to predict the emergence of ξ-N2 and the stability of ξ-N2 at 17 GPa and 22 GPa, respectively, and this result is in good agreement with the phase diagram of nitrogen.
Collapse
Affiliation(s)
- Zhi-Xin Bai
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Cheng-Lu Jiang
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Sheng-Hai Zhu
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Mi Zhong
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Ming-Jian Zhang
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Fu-Sheng Liu
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Bin Tang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Qi-Jun Liu
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China
| | - Xiang-Hui Chang
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China.
| |
Collapse
|
7
|
Badin M, Martoňák R. Nucleating a Different Coordination in a Crystal under Pressure: A Study of the B1-B2 Transition in NaCl by Metadynamics. PHYSICAL REVIEW LETTERS 2021; 127:105701. [PMID: 34533357 DOI: 10.1103/physrevlett.127.105701] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Here we propose an NPT metadynamics simulation scheme for pressure-induced structural phase transitions, using coordination number and volume as collective variables, and apply it to the reconstructive structural transformation B1-B2 in NaCl. By studying systems with size up to 64 000 atoms we reach a regime beyond collective mechanism and observe transformations proceeding via nucleation and growth. We also reveal the crossover of the transition mechanism from Buerger-like for smaller systems to Watanabe-Tolédano for larger ones. The scheme is likely to be applicable to a broader class of pressure-induced structural transitions, allowing study of complex nucleation effects and bringing simulations closer to realistic conditions.
Collapse
Affiliation(s)
- Matej Badin
- SISSA - Scuola Internazionale Superiore di Studi Avanzati, Via Bonomea 265, 34136 Trieste, Italy
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynská Dolina F2, 842 48 Bratislava, Slovakia
| | - Roman Martoňák
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynská Dolina F2, 842 48 Bratislava, Slovakia
| |
Collapse
|
8
|
Cook C, McKinley JL, Beran GJO. Modeling the α- and β-resorcinol phase boundary via combination of density functional theory and density functional tight-binding. J Chem Phys 2021; 154:134109. [PMID: 33832233 PMCID: PMC8019358 DOI: 10.1063/5.0044385] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/10/2021] [Indexed: 02/06/2023] Open
Abstract
The ability to predict not only what organic crystal structures might occur but also the thermodynamic conditions under which they are the most stable would be extremely useful for discovering and designing new organic materials. The present study takes a step in that direction by predicting the temperature- and pressure-dependent phase boundary between the α and β polymorphs of resorcinol using density functional theory (DFT) and the quasi-harmonic approximation. To circumvent the major computational bottleneck associated with computing a well-converged phonon density of states via the supercell approach, a recently developed approximation is employed, which combines a supercell phonon density of states from dispersion-corrected third-order density functional tight binding [DFTB3-D3(BJ)] with frequency corrections derived from a smaller B86bPBE-XDM functional DFT phonon calculation on the crystallographic unit cell. This mixed DFT/DFTB quasi-harmonic approach predicts the lattice constants and unit cell volumes to within 1%-2% at lower pressures. It predicts the thermodynamic phase boundary in almost perfect agreement with the experiment, although this excellent agreement does reflect fortuitous cancellation of errors between the enthalpy and entropy of transition.
Collapse
Affiliation(s)
- Cameron Cook
- Department of Chemistry, University of California, Riverside, California 92521, USA
| | - Jessica L. McKinley
- Department of Chemistry, University of California, Riverside, California 92521, USA
| | - Gregory J. O. Beran
- Department of Chemistry, University of California, Riverside, California 92521, USA
| |
Collapse
|
9
|
Liu Z, Wei S, Guo Y, Sun H, Sun H, Chang Q, Sun Y. Pressure-induced stability and polymeric nitrogen in alkaline earth metal N-rich nitrides (XN 6, X = Ca, Sr and Ba): a first-principles study. RSC Adv 2021; 11:17222-17228. [PMID: 35479712 PMCID: PMC9033170 DOI: 10.1039/d1ra01631h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/03/2021] [Indexed: 11/21/2022] Open
Abstract
The Fddd-SrN6 structure can transform into P1̄-SrN6, and polymerized to infinite nitrogen chain structures at P = 22 GPa. For BaN6, the Fmmm-BaN6 structure can transform into C2/m-BaN6, and polymerized to N6 ring network structure at P = 110 GPa.
Collapse
Affiliation(s)
- Zhipeng Liu
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| | - Shuli Wei
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| | - Yanhui Guo
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| | - Haiyang Sun
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| | - Hao Sun
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| | - Qiang Chang
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| | - Yuping Sun
- School of Physics and Optoelectronic Engineering
- Shandong University of Technology
- 250049 Zibo
- China
| |
Collapse
|
10
|
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.
Collapse
Affiliation(s)
- Sergey V Bondarchuk
- Department of Chemistry and Nanomaterials Science, Bogdan Khmelnitsky Cherkasy National University, blvd. Shevchenko 81, 18031 Cherkasy, Ukraine
| |
Collapse
|
11
|
Yao Z, Hu M, Iqbal Z, Wang X. N8– Polynitrogen Stabilized on Boron-Doped Graphene as Metal-Free Electrocatalysts for Oxygen Reduction Reaction. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03610] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhenhua Yao
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Maocong Hu
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Zafar Iqbal
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Xianqin Wang
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| |
Collapse
|
12
|
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
| |
Collapse
|
13
|
Niu S, Liu S, Liu B, Shi X, Liu S, Liu R, Yao M, Cui T, Liu B. High energetic polymeric nitrogen sheet confined in a graphene matrix. RSC Adv 2018; 8:30912-30918. [PMID: 35548752 PMCID: PMC9085521 DOI: 10.1039/c8ra03453b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 07/28/2018] [Indexed: 01/01/2023] Open
Abstract
Polymeric nitrogen, as a potential high-energy-density material (HEDM), has many applications, such as in energy storage systems, explosives and propellants. Nowadays it is very urgent to find a suitable method to stabilize polymeric nitrogen at ambient conditions. Herein, we present a new hybrid structure where polymeric nitrogen sheets are sandwiched between graphene sheets in the form of a three-dimensional crystal. According to ab initio molecular dynamics (AIMD) calculations and phonon spectrum calculations, it is demonstrated that polymeric nitrogen sheets are stable at ambient pressure and temperature. The hybrid material has a higher nitrogen content (the weight ratio of nitrogen is up to 53.84%), and the corresponding energy density is 5.2 kJ g−1. The hybrid material (A7@graphene system) has a satisfactory energy density, detonation velocity and detonation pressure. Importantly, the hybrid material can be preserved up to 450 K, and above this temperature, the polymeric nitrogen sheets break up into polymeric nitrogen chains or nitrogen gases and release tremendous energy. Further calculations reveal that small charge transfer between the polymeric nitrogen sheets and graphene sheets creates a weak electrostatic attraction compared with other hybrid materials, which is just good for the stabilization of the polymeric nitrogen sheets at ambient conditions, and favors energy release in a gentle way. The proposed confinement hybrid material which has a high energy density and a gentle energy release temperature, provides a highly promising method for the capture and application of polymeric nitrogen in a controllable way. The hybrid material (A7@graphene system) provides a highly promising method for the capture and storage of polymeric nitrogen in a controllable way.![]()
Collapse
Affiliation(s)
- Shifeng Niu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Shijie Liu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
- School of Physics and Engineering
| | - Bo Liu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Xuhan Shi
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Shuang Liu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Ran Liu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Mingguang Yao
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Tian Cui
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| | - Bingbing Liu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- P. R. China
| |
Collapse
|
14
|
Abstract
Interest in molecular crystals has grown thanks to their relevance to pharmaceuticals, organic semiconductor materials, foods, and many other applications. Electronic structure methods have become an increasingly important tool for modeling molecular crystals and polymorphism. This article reviews electronic structure techniques used to model molecular crystals, including periodic density functional theory, periodic second-order Møller-Plesset perturbation theory, fragment-based electronic structure methods, and diffusion Monte Carlo. It also discusses the use of these models for predicting a variety of crystal properties that are relevant to the study of polymorphism, including lattice energies, structures, crystal structure prediction, polymorphism, phase diagrams, vibrational spectroscopies, and nuclear magnetic resonance spectroscopy. Finally, tools for analyzing crystal structures and intermolecular interactions are briefly discussed.
Collapse
Affiliation(s)
- Gregory J O Beran
- Department of Chemistry, University of California , Riverside, California 92521, United States
| |
Collapse
|