1
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Han J, Yang Y, Hou Y, Tang M, Zhang Y, Zhu Y, Liu X, Wang J, Gao Y. Insight into Formation, Synchronized Release and Stability of Co-Amorphous Curcumin-Piperine by Integrating Experimental-Modeling Techniques. J Pharm Sci 2024; 113:1874-1884. [PMID: 38354909 DOI: 10.1016/j.xphs.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/16/2024]
Abstract
Intermolecular interactions between drug and co-former are crucial in the formation, release and physical stability of co-amorphous system. However, the interactions remain difficult to investigate with only experimental tools. In this study, intermolecular interactions of co-amorphous curcumin-piperine (i.e., CUR-PIP CM) during formation, dissolution and storage were explored by integrating experimental and modeling techniques. The formed CUR-PIP CM exhibited the strong hydrogen bond interaction between the phenolic OH group of CUR and the CO group of PIP as confirmed by FTIR, ss 13C NMR and molecular dynamics (MD) simulation. In comparison to crystalline CUR, crystalline PIP and their physical mixture, CUR-PIP CM performed significantly increased dissolution accompanied by the synchronized release of CUR and PIP, which arose from the greater interaction energy of H2O-CUR molecules and H2O-PIP molecules than CUR-PIP molecules, breaking the hydrogen bond between CUR and PIP molecules, and then causing a pair-wise solvation of CUR-PIP CM at the molecular level. Furthermore, the stronger intermolecular interaction between CUR and PIP was revealed by higher binding energy of CUR-PIP molecules, which contributed to the excellent physical stability of CUR-PIP CM over amorphous CUR or PIP. The study provides a unique insight into the formation, release and stability of co-amorphous system from MD perspective. Meanwhile, this integrated technique can be used as a practical methodology for the future design of co-amorphous formulations.
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Affiliation(s)
- Jiawei Han
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, PR China; School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China; Changzhou Pharmaceutical Factory Co., LTD, Changzhou 213018, PR China
| | - Yang Yang
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, PR China
| | - Yunjuan Hou
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, PR China
| | - Mengyuan Tang
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, PR China
| | - Yunran Zhang
- Changzhou Pharmaceutical Factory Co., LTD, Changzhou 213018, PR China
| | - Yijun Zhu
- Changzhou Pharmaceutical Factory Co., LTD, Changzhou 213018, PR China
| | - Xiaoqian Liu
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, PR China.
| | - Jue Wang
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, PR China.
| | - Yuan Gao
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China.
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2
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Tang L, Zhu W. Theoretical study on the structure, electronic properties, intermolecular interactions, and detonation performance of DAF:ADNP co-crystal. J Mol Model 2023; 29:191. [PMID: 37256459 DOI: 10.1007/s00894-023-05601-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 05/22/2023] [Indexed: 06/01/2023]
Abstract
CONTEXT Explosives have a wide range of applications in many fields due to their high energy and high density. Recently, a new synthesized co-crystal explosive DAF:ADNP presents high detonation performance and low sensitivity. This work is aimed to understand how the structure and intermolecular interactions affect the performance of the DAF:ADNP co-crystal. The results indicate that the formed π-π interactions and stronger hydrogen bonds in the co-crystal enhance its stability and its impact sensitivity is reduced. The strong intralayer H···N and H···O interactions and interlayer π-π stacking are the main driving force for the formation of the co-crystal. Compared with the pure crystals, the detonation performance of the co-crystal slightly decreases, while its sensitivity reduces. METHODS All calculations were used the DFT-PBE-D method with Vanderbilt-type ultrasoft pseudopotentials and plane wave (340.0 eV) in the CASTEP package. Radial distribution function were calculated by NVT-MD simulations for 100 ps with a time step of 1 fs at 298 K. Hirshfeld surfaces were generated by CrystalExplorer 3.0 and reduced density gradient analyses were performed by Multiwfn 3.0.
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Affiliation(s)
- Li Tang
- Institute for Computation in Molecular and Materials Science, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Weihua Zhu
- Institute for Computation in Molecular and Materials Science, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
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3
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Kazakov AI, Lempert DB, Nabatova AV, Gorbovskii KG, Chukanov NV, Ignatieva EL, Dashko DV, Yanovskiy LS. Thermal Stability of Trimolecular Cocrystallizate Based on Energy-Intensive Polynitramine CL-20 with H2O2 and H2O and its Efficiency in Solid Composites. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122060173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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4
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Chukanov NV, Shilov GV, Ignat’eva EL, Dashko DV, Lempert DB, Kazakov AI, Aldoshin SM. Monoclinic Modification of Trimolecular Cocrystallizate of the High-Energy Polynitramine CL-20 with H2O2 and H2O: Synthesis and Structure. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122050025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Gimaldinova MA, Maslov MM, Katin KP. Energy and Electronic Properties of Nanostructures Based on the CL-20 Framework with the Replacement of the Carbon Atoms by Silicon and Germanium: A Density Functional Theory Study. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6577. [PMID: 36233924 PMCID: PMC9572965 DOI: 10.3390/ma15196577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/14/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
We consider SinCL-20 and GenCL-20 systems with carbon atoms replaced by silicon/germanium atoms and their dimers. The physicochemical properties of the silicon/germanium analogs of the high-energy molecule CL-20 and its dimers were determined and studied using density functional theory with the B3LYP/6-311G(d,p) level of theory. It was found that the structure and geometry of SinCL-20/GenCL-20 molecules change dramatically with the appearance of Si-/Ge-atoms. The main difference between silicon- or germanium-substituted SinCL-20/GenCL-20 molecules and the pure CL-20 molecule is that the NO2 functional groups make a significant rotation relative to the starting position in the classical molecule, and the effective diameter of the frame of the systems increases with the addition of Si-/Ge-atoms. Thus, the effective framework diameter of a pure CL-20 molecule is 3.208 Å, while the effective diameter of a fully silicon-substituted Si6CL-20 molecule is 4.125 Å, and this parameter for a fully germanium-substituted Ge6CL-20 molecule is 4.357 Å. The addition of silicon/germanium atoms to the system leads to a decrease in the binding energy. In detail, the binding energies for CL-20/Si6CL-20/Ge6CL-20 molecules are 4.026, 3.699, 3.426 eV/atom, respectively. However, it has been established that the framework maintains stability, with an increase in the number of substituting silicon or germanium atoms. In addition, we designed homodesmotic reactions for the CL-20 molecule and its substituted derivatives Si6CL-20/Ge6CL-20, and then determined the strain energy to find out in which case more energy would be released when the framework breaks. Further, we also studied the electronic properties of systems based on CL-20 molecules. It was found that the addition of germanium or silicon atoms instead of carbon leads to a decrease in the size of the HOMO-LUMO gap. Thus, the HOMO-LUMO gaps of the CL-20/Si6CL-20/Ge6CL-20 molecules are 5.693, 5.339, and 5.427 eV, respectively. A similar dependence is also observed for CL-20 dimers. So, in this work, we have described in detail the dependence of the physicochemical parameters of CL-20 molecules and their dimers on the types of atoms upon substitution.
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Affiliation(s)
- Margarita A. Gimaldinova
- Nanoengineering in Electronics, Spintronics and Photonics Institute, National Research Nuclear University “MEPhI”, Kashirskoe Shosse 31, 115409 Moscow, Russia
| | - Mikhail M. Maslov
- Nanoengineering in Electronics, Spintronics and Photonics Institute, National Research Nuclear University “MEPhI”, Kashirskoe Shosse 31, 115409 Moscow, Russia
- Laboratory of Computational Design of Nanostructures, Nanodevices, and Nanotechnologies, Research Institute for the Development of Scientific and Educational Potential of Youth, Aviatorov Str. 14/55, 119620 Moscow, Russia
| | - Konstantin P. Katin
- Nanoengineering in Electronics, Spintronics and Photonics Institute, National Research Nuclear University “MEPhI”, Kashirskoe Shosse 31, 115409 Moscow, Russia
- Laboratory of Computational Design of Nanostructures, Nanodevices, and Nanotechnologies, Research Institute for the Development of Scientific and Educational Potential of Youth, Aviatorov Str. 14/55, 119620 Moscow, Russia
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Zhao X, Li J, Quan S, Fu X, Meng S, Jiang L, Fan X. Study on the effect of solvent on cocrystallization of CL-20 and HMX through theoretical calculations and experiments. RSC Adv 2022; 12:21255-21263. [PMID: 35975069 PMCID: PMC9341422 DOI: 10.1039/d2ra03730k] [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: 06/17/2022] [Accepted: 07/19/2022] [Indexed: 12/04/2022] Open
Abstract
Cocrystallization is a helpful method for explosives design. However, lack of understanding of the cocrystallization mechanism leads to inefficiency in cocrystal preparation. Therefore, studying the effects of solvent on cocrystal is of great importance for the efficient application of 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (CL-20). In this paper, the effect of solvent on cocrystallization is investigated by the CL-20/HMX cocrystal/solvent cluster model, the CL-20/HMX/solvent mixture model, the CL-20/HMX cocrystal/solvent interface model combined with quantum chemistry and molecular dynamic methods. The authors find that the hydrogen bond between CL-20 and 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) is the strongest and the binding energy of cocrystal and solvent molecules is the weakest in ethyl acetate (EA) solvent, indicating that CL-20 and HMX tend to be combined together and there is less hindrance by solvent molecules. Analysis of the CL-20/HMX/solvent mixture and mass density distribution studies show that the solvent effect has a great influence on the crystal faces and the cocrystallization rate of CL-20 and HMX is the highest in EA solvent. The XRD and SEM characterization results are consistent with the theoretical calculations. The present work on the effects of solvent on CL-20/HMX cocrystals is beneficial for understanding the mechanism of the growth of energetic cocrystal materials. It is helpful in selecting more suitable theoretical and experimental conditions and makes access to excellent cocrystals more efficient. Cocrystallization is a helpful method for explosives design. Studying the effects of solvent on cocrystal is of great importance for the efficient application of CL-20/HMX cocrystal.![]()
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Affiliation(s)
- Xitong Zhao
- Xi'an Modern Chemistry Research Institute Xi'an 710065 Shaanxi China
| | - Jizhen Li
- Xi'an Modern Chemistry Research Institute Xi'an 710065 Shaanxi China
| | - Shuxin Quan
- Qingyang Chemical Industry Corporation Liaoyang 111001 Liaoning China
| | - Xiaolong Fu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 Shaanxi China
| | - Saiqin Meng
- Xi'an Modern Chemistry Research Institute Xi'an 710065 Shaanxi China
| | - Liping Jiang
- Xi'an Modern Chemistry Research Institute Xi'an 710065 Shaanxi China
| | - Xuezhong Fan
- Xi'an Modern Chemistry Research Institute Xi'an 710065 Shaanxi China
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7
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Srivastava I, Kotia A, Ghosh SK, Ali MKA. Recent advances of molecular dynamics simulations in nanotribology. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116154] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Jia Q, Wang J, Zhang S, Zhang J, Liu N, Kou K. Investigation of the solid-liquid ternary phase diagrams of 2HNIW·HMX cocrystal. RSC Adv 2021; 11:9542-9549. [PMID: 35423470 PMCID: PMC8695502 DOI: 10.1039/d1ra00057h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 02/20/2021] [Indexed: 01/20/2023] Open
Abstract
The influence of temperature and solvent on the solid–liquid ternary phase diagrams of the 2HNIW·HMX cocrystal has been investigated. Ternary phase diagrams were constructed for the 2HNIW·HMX cocrystal in acetonitrile and ethyl acetate at 15 °C and 25 °C. HMX and HNIW showed inconsistent dissolution behavior and congruent dissolution behavior in acetonitrile and ethyl acetate, respectively. In the HMX–HNIW–acetonitrile system, the 2HNIW·HMX cocrystal has a narrow thermodynamically stable region at both temperatures. The cocrystal exhibits a wider thermodynamically stable region in the HMX–HNIW–ethyl acetate system. The results show that the choice of solvent has a crucial influence on the dissolution behavior of the cocrystal and the size and position of each region in the phase diagram, while the temperature has no apparent effect on the overall appearance of the phase diagram. By properly selecting the ratios, the 2HNIW·HMX cocrystal could be prepared by the isothermal slurry conversion crystallization method. The ternary phase diagrams of 2HNIW·HMX cocrystal system in ethyl acetate at 15 °C. In the HMX–HNIW–ethyl acetate system, HMX and HNIW showed congruent dissolution behavior, and the cocrystal exhibits a wider thermodynamically stable region.![]()
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Affiliation(s)
- Qian Jia
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an Shaanxi 710072 China
| | - Jia Wang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an Shaanxi 710072 China
| | - Shijie Zhang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an Shaanxi 710072 China
| | - Jiaoqiang Zhang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an Shaanxi 710072 China
| | - Ning Liu
- Xi'an Modern Chemistry Institute Xi'an Shaanxi 710065 China
| | - Kaichang Kou
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an Shaanxi 710072 China
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9
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Comparative investigation on the thermostability, sensitivity, and mechanical performance of RDX/HMX energetic cocrystal and its mixture. J Mol Model 2020; 26:176. [PMID: 32535754 DOI: 10.1007/s00894-020-04426-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 05/18/2020] [Indexed: 11/27/2022]
Abstract
Molecular mechanics (MM) and molecular dynamics (MD) simulation method were applied to explore the impact of temperature (220-380 K) on the thermostability, sensitivity, and mechanical performance of RDX (1,3,5-trinitro-1,3,5-triazacyco-hexane)/HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane) energetic cocrystal and mixture models. The mechanical property, the maximum trigger bond length ([Formula: see text]), binding energy, and cohesive energy density (CED) of the pure RDX, β-HMX crystal, the cocrystal, and mixture models were acquired and compared. The results manifest that temperature has an important impact on the binding capacity between the components of the cocrystal and mixture. The binding energies decrease as the temperature rises, and the cocrystal has larger values than those of mixture. For all the models, the [Formula: see text] increases and the CEDs decrease with the rising temperature, implying that the sensitivity of the explosives increases, while the [Formula: see text] values of the cocrystal are smaller than those of HMX and the CED values are between those of RDX and β-HMX, indicating that the sensitivity has been enhanced through co-crystallization. As the temperature increases, the shear modulus (G), bulk modulus (K), and tensile modulus (E) values of all models have an evident downtrend. Simultaneously, G, K, and E values of the cocrystal model are less than those of RDX and β-HMX, while the K/G ratio and Cauchy pressure (C12-C44) are larger, signifying that co-crystallization can weaken the brittleness and enhance the ductility of the pure crystals. Compared with the mixture, the cocrystal has better ductility and stability.
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Key Words
- 1,3,5-trinitro-1,3,5-triazacyco-hexane (RDX)/1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) energetic cocrystal
- Mechanical performance
- Molecular dynamics simulation
- Sensitivity
- Thermostability
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10
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Zhu S, Ji J, Zhu W. Intermolecular interactions, vibrational spectra, and detonation performance of
CL
‐20/
TNT
cocrystal. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Simin Zhu
- Institute for Computation in Molecular and Materials Science, School of Chemical Engineering Nanjing University of Science and Technology Nanjing China
| | - Jincheng Ji
- Institute for Computation in Molecular and Materials Science, School of Chemical Engineering Nanjing University of Science and Technology Nanjing China
| | - Weihua Zhu
- Institute for Computation in Molecular and Materials Science, School of Chemical Engineering Nanjing University of Science and Technology Nanjing China
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11
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Zelenov VP, Baraboshkin NM, Khakimov DV, Muravyev NV, Meerov DB, Troyan IA, Pivina TS, Dzyabchenko AV, Fedyanin IV. Time for quartet: the stable 3 : 1 cocrystal formulation of FTDO and BTF – a high-energy-density material. CrystEngComm 2020. [DOI: 10.1039/d0ce00639d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A computer simulation of cocrystal structures of [1,2,5]oxadiazolo[3,4-e][1,2,3,4]tetrazine 4,6-dioxide (FTDO) with benzotrifuroxan (BTF) in ratios of (3–1 : 1) was performed. Theoretically and experimentally was shown: a (3 : 1) cocrystal is formed.
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Affiliation(s)
- Victor P. Zelenov
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Nikita M. Baraboshkin
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Dmitry V. Khakimov
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Nikita V. Muravyev
- N. N. Semenov Federal Research Center for Chemical Physics
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Dmitry B. Meerov
- N. N. Semenov Federal Research Center for Chemical Physics
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Ivan A. Troyan
- FSRC “Crystallography and Photonics”
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Tatyana S. Pivina
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Alexandr V. Dzyabchenko
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Ivan V. Fedyanin
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russian Federation
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12
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Theoretical calculation into the structures, stability, sensitivity, and mechanical properties of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12 hexaazai-sowurtzitane (CL-20)/1-amino-3-methyl-1,2,3-triazoliumnitrate (1-AMTN) cocrystal and its mixture. Struct Chem 2019. [DOI: 10.1007/s11224-019-01447-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Liu S, Ji F, Li X, Pan X, Chen S, Wang X, Zhang Y, Men Y. Stick-like mesoporous titania loaded Pd as highly active and cost effective catalysts for hydrodebenzylation of hexabenzylhexaazaisowurtzitane (HBIW). MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110556] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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14
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Viswanath JV, Shanigaram B, Vijayadarshan P, Chowadary TV, Gupta A, Bhanuprakash K, Niranjana SR, Venkataraman A. Studies and Theoretical Optimization of CL‐20 : RDX Cocrystal. PROPELLANTS EXPLOSIVES PYROTECHNICS 2019. [DOI: 10.1002/prep.201900126] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jalla Venkata Viswanath
- Materials Chemistry Laboratory, Department of Materials ScienceGulbarga University Kalaburagi- 585106 Karnataka India
- R&D centrePremier Explosives Limited Peddakandukur- 508286 Telangana India
| | - Balaiah Shanigaram
- Catalysis and Fine Chemicals DepartmentCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
| | - Panga Vijayadarshan
- Materials Chemistry Laboratory, Department of Materials ScienceGulbarga University Kalaburagi- 585106 Karnataka India
- R&D centrePremier Explosives Limited Peddakandukur- 508286 Telangana India
| | | | - Amarnath Gupta
- R&D centrePremier Explosives Limited Peddakandukur- 508286 Telangana India
| | - Kotamarthi Bhanuprakash
- Catalysis and Fine Chemicals DepartmentCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
| | | | - Abbaraju Venkataraman
- Materials Chemistry Laboratory, Department of Materials ScienceGulbarga University Kalaburagi- 585106 Karnataka India
- Department of ChemistryGulbarga University Kalaburagi- 585106 Karnataka India
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15
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Theoretical calculation into the effect of molar ratio on the structures, stability, mechanical properties and detonation performance of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane/ 1,3,5-trinitro-1,3,5-triazacyco-hexane cocrystal. J Mol Model 2019; 25:299. [PMID: 31482441 DOI: 10.1007/s00894-019-4181-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 08/20/2019] [Indexed: 10/26/2022]
Abstract
Molecular dynamics (MD) simulation was conducted to research the effect of molar ratio on the thermal stability, mechanical properties, and detonation performance of HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane)/RDX (1,3,5-trinitro-1,3,5-triazacyco-hexane) cocrystal explosive at ambient condition. The binding energy, mechanical properties, and the detonation parameters of the pure β-HMX, RDX crystal, and the cocrystal models were got and contrasted. The results demonstrate that molar ratio has a great influence on the properties of the cocrystal system. The binding energy of the cocrystals has the maximum values at the 1:1 molar ratio, indicating that the stability of HMX/RDX(1:1) cocrystal is the best and HMX and RDX may prefer to cocrystallizing at 1:1 molar ratio. What's more, the tensile modulus (E) and shear modulus (G) of the HMX/RDX(1:1) cocrystals have the minimum value, while the C12-C44 and K/G have the maximum value, implying that the cocrystal at 1:1 molar ratio has the best mechanical properties. Simultaneously, the E, K, and G of the cocrystals are all smaller than those of β-HMX's and generally larger than those RDX's, while the Cauchy pressure (C12-C44) and K/G ratio were greater, demonstrating that cocrystallizing can improve the brittleness and enhance the ductility. The detonation velocity (D) and detonation pressure (P) decrease with the rising RDX content, while the properties are still superior to the pure RDX crystal; thus, the energy properties of the cocrystal are still excellent. In a word, HMX/RDX cocrystal at 1:1 molar ratio has the best thermal stability, mechanical properties, and the excellent energetic performance.
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16
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Duan B, Shu Y, Liu N, Lu Y, Wang B, Lu X, Zhang J. Comparative studies on structure, sensitivity and mechanical properties of CL-20/DNDAP cocrystal and composite by molecular dynamics simulation. RSC Adv 2018; 8:34690-34698. [PMID: 35548627 PMCID: PMC9087360 DOI: 10.1039/c8ra07387b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 10/01/2018] [Indexed: 11/21/2022] Open
Abstract
Molecular dynamics simulation was performed on 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20), 2,4-dinitro-2,4-diazapentane (DNDAP), and CL-20/DNDAP cocrystal and composite under COMPASS force field at different temperatures. The binding energy (Ebind), radial distribution function (RDF), trigger bond length, cohesive energy density (CED) and mechanical properties were studied and compared. The results show that the binding energy of the cocrystal is evidently higher than that of the composite at the same temperature. RDF analysis reveals that hydrogen bonds and vdW forces between CL-20 and DNDAP exist in both CL-20/DNDAP cocrystal and composite, and the interactions in the cocrystal are stronger than those in the composite. The maximum trigger bond length decreases in the order ε-CL-20 > CL-20/DNDAP composite > CL-20/DNDAP cocrystal. Moreover, the rigidity and stiffness of the cocrystal and composite decrease compared to that of CL-20, while the ductility and elasticity are better than that of the two pure components. These results demonstrate that CL-20/DNDAP cocrystal might be very promising in explosive applications. This work proves that cocrystallization is a more effective modification method than mixing and elucidated the underlying mechanism.![]()
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Affiliation(s)
- Binghui Duan
- Xi'an Modern Chemistry Research Institute Xi'an 710065 People's Republic of China
| | - Yuanjie Shu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 People's Republic of China .,State Key Laboratory of Fluorine & Nitrogen Chemicals Xi'an 710065 People's Republic of China
| | - Ning Liu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 People's Republic of China .,State Key Laboratory of Fluorine & Nitrogen Chemicals Xi'an 710065 People's Republic of China
| | - Yingying Lu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 People's Republic of China
| | - Bozhou Wang
- Xi'an Modern Chemistry Research Institute Xi'an 710065 People's Republic of China .,State Key Laboratory of Fluorine & Nitrogen Chemicals Xi'an 710065 People's Republic of China
| | - Xianming Lu
- Xi'an Modern Chemistry Research Institute Xi'an 710065 People's Republic of China .,State Key Laboratory of Fluorine & Nitrogen Chemicals Xi'an 710065 People's Republic of China
| | - Jiaoqiang Zhang
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University Xi'an 710129 People's Republic of China
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Lou D, Wang H, Liu S, Li L, Zhao W, Chen X, Wang J, Li X, Wu P, Yang J. PdFe bimetallic catalysts for debenzylation of hexabenzylhexaazaisowurtzitane (HBIW) and tetraacetyldibenzylhexaazaisowurtzitane (TADBIW). CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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