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Parakhin VV, Pokhvisneva GV, Shlykova NI, Samigullina AI, Nikitin SV, Smirnov GA, Gordeev PB, Kon'kova TS, Lempert DB, Pivkina AN. Highly energetic N-cyano-substituted CL-20 analogues: challenging the stability limits of polynitro hexaazaisowurtzitanes. Dalton Trans 2024; 53:6100-6111. [PMID: 38482568 DOI: 10.1039/d3dt04203k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
To design high-energy-density materials of a new level, it is necessary to develop methods for the functionalization of energetic scaffolds, which will make it possible to tune their physicochemical and energetic properties. For this reason, we have elaborated an approach for synthesizing a new series of energetic cage compounds with advanced properties by introducing the N-cyano group into the polynitro hexaazaisowurtzitane framework. The structures of the obtained substances were fully characterized with a combination of methods, including multinuclear (1H, 13C{1H}, 14N, and 15N{1H}) NMR and IR spectroscopy, high-resolution mass spectrometry, X-ray diffraction analysis, electron microscopy and quantum chemical calculations. For the resulting compounds, thermal stability and safety tests were carried out, calorimetric and pycnometric measurements were performed, and the energetic potential was determined by high-temperature chemical equilibrium thermodynamic calculations. The new cyano derivatives have an acceptable density (up to 1.92 g cm-3) and a high enthalpy of formation (up to 2 MJ kg-1), which is 2 times that of the benchmark CL-20. The resistance of the target compounds to friction (up to 220 N) is the highest compared to CL-20 and its known analogues. 4,10-Dicyano-2,6,8,12-tetranitro-2,4,6,8,10,12-hexaazaisowurtzitane of the new series is the most thermally stable (a Tdec of 238 °C) among the known energetic polynitro hexaazaisowurtzitanes and is the first derivative of this family to surpass CL-20 in heat resistance. Moreover, the specific impulse for the novel materials showed an improvement of 6.5-13 s over CL-20.
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Affiliation(s)
- Vladimir V Parakhin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Galina V Pokhvisneva
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Nina I Shlykova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Aida I Samigullina
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Sergei V Nikitin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Gennady A Smirnov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Pavel B Gordeev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Tatyana S Kon'kova
- N. N. Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences, Moscow, 119991, Russian Federation
| | - David B Lempert
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Ac. Semenov Avenue 1, Chernogolovka, Moscow Region, 142432, Russian Federation
| | - Alla N Pivkina
- N. N. Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences, Moscow, 119991, Russian Federation
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Synthesis of Pentacycloundecane (PCUD) Based Spiro-Pyrano-Cage Framework via Ring-Closing Metathesis. MOLBANK 2023. [DOI: 10.3390/m1567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Here, we demonstrate a short synthetic route to pyrano cage systems containing pentacycloundecane units by employing ring-closing metathesis (RCM) as a key step. These cage systems were constructed starting with readily available starting materials by adopting atomic economic processes such as cycloadditions (Diels-Alder reaction and [2+2] cycloaddition), Grignard addition, and olefin metathesis. The key building block, such as hexacyclic cage dione, was prepared from 1,4-naphthoquinone derivative and freshly cracked 1,3-cyclopentadiene. Some of these heterocyclic motifs are useful in biological chemistry and valuable as key synthons for high-energy-density materials.
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Investigation of 1,4-Substituted 1,2,3-Triazole Derivatives as Antiarrhythmics: Synthesis, Structure, and Properties. Pharmaceuticals (Basel) 2022; 15:ph15121443. [PMID: 36558894 PMCID: PMC9781658 DOI: 10.3390/ph15121443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/18/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
Here, we investigated the reaction of 1,3-dipolar cycloaddition of 1,3-diazido-2-nitro-2- azapropane (DANP) to propargyl alcohol over a copper-based catalyst and identified the optimum reaction conditions that enable the synthesis of 2-nitro-1,3-bis(4,4'-dihydroxymethyl)-1,2,3-triazolyl-2-azapropane (1) in more than 84% yield. The reaction between DANP, 1,5-diazido-3-nitrazapentane, and phenylacetylene produced the respective 1,2,3-triazole derivatives in 83% and 71% yields, respectively. The structures of the resultant compounds were validated by infrared and NMR spectroscopies and elemental analysis. The structure of 1 was proved by single-crystal X-ray diffraction. This study demonstrated that 1 exhibits a dose-dependent antiarrhythmic activity towards calcium-chloride-induced arrhythmia and refers to Class III: moderately hazardous substances.
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Lal S, Bhattacharjee A, Chowdhury A, Kumbhakarna N, Namboothiri INN. Approaches to 1,4-Disubstituted Cubane Derivatives as Energetic Materials: Design, Theoretical Studies and Synthesis. Chem Asian J 2022; 17:e202200489. [PMID: 35767352 DOI: 10.1002/asia.202200489] [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: 05/12/2022] [Revised: 06/26/2022] [Indexed: 11/10/2022]
Abstract
Novel 1,4-disubstituted cubane derivatives have been designed and selected ones have been successfully synthesized and characterized by various analytical and spectroscopic techniques, including single-crystal X-ray analysis. A detailed computational study at B3LYP/6-311++G(d,p) level of theory revealed that all newly designed 1,4-disubstituted cubane derivatives possess higher densities, higher density-specific impulse and superior ballistic properties when compared to conventional fuels, for example, RP-1. These compounds also exhibit acceptable kinetic and thermodynamic stabilities which were evaluated in terms of their HOMO-LUMO energy gap and bond dissociation energies, respectively, and are superior to TEX and many other compounds containing explosophoric groups. These results provide novel insights into the possible application of cubane-based energetic materials.
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Affiliation(s)
- Sohan Lal
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Argha Bhattacharjee
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Arindrajit Chowdhury
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Neeraj Kumbhakarna
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
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Pletzer M, Plasser F, Rimmele M, Heeney M, Glöcklhofer F. [2.2.2.2]Paracyclophanetetraenes (PCTs): cyclic structural analogues of poly( p‑phenylene vinylene)s (PPVs). OPEN RESEARCH EUROPE 2022; 1:111. [PMID: 37645175 PMCID: PMC10445936 DOI: 10.12688/openreseurope.13723.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/03/2022] [Indexed: 08/31/2023]
Abstract
Background: Poly( p-phenylene vinylene)s ( PPVs) and [2.2.2.2]paracyclophanetetraene ( PCT) are both composed of alternating π-conjugated para-phenylene and vinylene units. However, while the former constitute a class of π-conjugated polymers that has been used in organic electronics for decades, the latter is a macrocycle that only recently revealed its potential for applications such as organic battery electrodes. The cyclic structure endows PCT with unusual properties, and further tuning of these may be required for specific applications. Methods: In this article, we adopt an approach often used for tuning the properties of PPVs, the introduction of alkoxy (or alkylthio) substituents at the phenylene units, for tuning the optoelectronic properties of PCT. The resulting methoxy- and methylthio-substituted PCTs, obtained by Wittig cyclisation reactions, are studied by UV-vis absorption, photoluminescence, and cyclic voltammetry measurements, and investigated computationally using the visualisation of chemical shielding tensors (VIST) method. Results: The measurements show that substitution leads to slight changes in terms of absorption/emission energies and redox potentials while having a pronounced effect on the photoluminescence intensity. The computations show the effect of the substituents on the ring currents and chemical shielding and on the associated local and global (anti)aromaticity of the macrocycles, highlighting the interplay of local and global aromaticity in various electronic states. Conclusions: The study offers interesting insights into the tuneability of the properties of this versatile class of π-conjugated macrocycles.
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Affiliation(s)
- Matthias Pletzer
- Department of Chemistry, Imperial College London, London, W12 0BZ, UK
- Centre for Processable Electronics, Imperial College London, London, W12 0BZ, UK
| | - Felix Plasser
- Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK
| | - Martina Rimmele
- Department of Chemistry, Imperial College London, London, W12 0BZ, UK
- Centre for Processable Electronics, Imperial College London, London, W12 0BZ, UK
| | - Martin Heeney
- Department of Chemistry, Imperial College London, London, W12 0BZ, UK
- Centre for Processable Electronics, Imperial College London, London, W12 0BZ, UK
| | - Florian Glöcklhofer
- Department of Chemistry, Imperial College London, London, W12 0BZ, UK
- Centre for Processable Electronics, Imperial College London, London, W12 0BZ, UK
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Wen L, Yu T, Lai W, Shi J, Liu M, Liu Y, Wang B. Intra‐Ring
Bridging: A Strategy for Molecular Design of Highly Energetic Nitramines. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100190] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Linyuan Wen
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an Shaanxi 710065 China
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049 China
| | - Tao Yu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an Shaanxi 710065 China
| | - Weipeng Lai
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an Shaanxi 710065 China
| | - Jinwen Shi
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049 China
| | - Maochang Liu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049 China
| | - Yingzhe Liu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an Shaanxi 710065 China
| | - Bozhou Wang
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an Shaanxi 710065 China
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Lal S, Chowdhury A, Kumbhakarna N, Nandagopal S, Kumar A, Namboothiri INN. Synthesis and energetic properties of homocubane based high energy density materials. Org Chem Front 2021. [DOI: 10.1039/d0qo01084g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Novel Homocubane based HED materials with high densities, HOF and density specific impulse are superior to conventional fuels RP1 and HTPB.
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Affiliation(s)
- Sohan Lal
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Arindrajit Chowdhury
- Department of Mechanical Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Neeraj Kumbhakarna
- Department of Mechanical Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Sundaramoorthy Nandagopal
- High Energy Materials Research Laboratory
- Defence Research and Development Organisation
- Pune 411 021
- India
| | - Arvind Kumar
- High Energy Materials Research Laboratory
- Defence Research and Development Organisation
- Pune 411 021
- India
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