Optimizing the oxygen balance by changing the A-site cations in molecular perovskite high-energetic materials

CrystEngComm, Journal Year: 2018, Volume and Issue: 20(46), P. 7458 - 7463

Published: Jan. 1, 2018

Two new members of molecular perovskite high-energetic materials exhibit optimized oxygen balances by changing the A-site cations.

Language: Английский

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Anionic metal–organic frameworks lead the way to eco-friendly high-energy-density materials

Journal of Materials Chemistry A, Journal Year: 2016, Volume and Issue: 4(20), P. 7596 - 7600

Published: Jan. 1, 2016

Eco-friendly high-energy-density materials with remarkably high nitrogen contents and heats of detonation are achieved based on an anionic MOF strategy. Meanwhile, their stabilities insensitivities well improved by hydrogen bonds.

Language: Английский

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Bis(4‐nitraminofurazanyl‐3‐azoxy)azofurazan and Derivatives: 1,2,5‐Oxadiazole Structures and High‐Performance Energetic Materials

Angewandte Chemie International Edition, Journal Year: 2016, Volume and Issue: 55(38), P. 11548 - 11551

Published: Aug. 11, 2016

Abstract Bis(4‐nitraminofurazanyl‐3‐azoxy)azofurazan ( 1 ) and ten of its energetic salts were prepared fully characterized. Computational analysis based on isochemical shielding surface trigger bond dissociation enthalpy provide a better understanding the thermal stabilities for nitramine‐furazans. These compounds exhibit good densities, high heats formation, excellent detonation velocity pressure. Some representative compounds, example, v D : 9541 m s −1 ; P 40.5 GPa), 4 9256 38.0 GPa) performances, which are comparable with current explosives such as RDX 8724 35.2 HMX 9059 39.2 GPa).

Language: Английский

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A solvent-free dense energetic metal–organic framework (EMOF): to improve stability and energetic performance via in situ microcalorimetry

Chemical Communications, Journal Year: 2017, Volume and Issue: 53(21), P. 3034 - 3037

Published: Jan. 1, 2017

It is a tremendous challenge to prepare solvent-free dense energetic metal-organic frameworks (EMOFs), hence also improve their stability and performance. In this study, based on in situ microcalorimetry, an interpenetrating EMOF without solvent molecules, [Cu(tztr)]n (1, H2tztr = 3-(tetrazol-5-yl)triazole) was obtained, possessing high (Tdec 360 °C) outstanding properties (ΔHdet 7.53 kcal cm-3, D 8.429 km s-1, P 40.02 GPa).

Language: Английский

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Access to green primary explosives via constructing coordination polymers based on bis-tetrazole oxide and non-lead metals

Green Chemistry, Journal Year: 2019, Volume and Issue: 21(8), P. 1947 - 1955

Published: Jan. 1, 2019

An environmentally friendly method to prepare new-generation green primary explosives with excellent performances has been developed on the basis of a coordination chemistry strategy.

Language: Английский

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A novel 3D energetic MOF of high energy content: synthesis and superior explosive performance of a Pb(ii) compound with 5,5′-bistetrazole-1,1′-diolate

Dalton Transactions, Journal Year: 2016, Volume and Issue: 45(35), P. 13881 - 13887

Published: Jan. 1, 2016

The development of high-performance insensitive energetic materials is important because the increasing demand for these in military and civilian applications. A novel 3D metal-organic framework (MOF) exceptionally high energy content, [Pb(BTO)(H2O)]n, was synthesized structurally characterized by single crystal X-ray diffraction, featuring a three-dimensional parallelogram porous framework, where BTO represents 5,5'-bistetrazole-1,1'-diolate. thermal stability properties were determined, exhibiting good thermostability (Td = 309.0 °C), excellent detonation pressure (P) 53.06 GPa, velocity (D) 9.204 km s(-1), acceptable sensitivity to confirmed impact (IS 7.5 J). Notably, complex possesses unprecedented superior density than reported MOFs. results highlight this new MOF as potential material.

Language: Английский

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Evolution of Oxidizing Inorganic Metal Salts: Ultrafast Laser Initiation Materials Based on Energetic Cationic Coordination Polymers

ACS Applied Materials & Interfaces, Journal Year: 2019, Volume and Issue: 11(44), P. 41523 - 41530

Published: Oct. 9, 2019

An effective and novel design strategy for ultrafast laser-initiating materials has been established on the basis of coordination chemistry first time in present work. In view positive effect Ag ion perchlorate laser sensitivity, silver as a representative oxidizing inorganic metal salts was used to construct energetic cationic polymers (ECCPs), which solved inconvenient situation caused by difficulty applying these directly because unavoidable hygroscopicity inhomogeneity physical mixtures oxidants reductants. With nonenergetic nitrogen-rich ligand 3-amino-1H-1,2,4-triazole-5-carbohydrazide (ATCA), one new laser-sensitive Ag(I)-based ECCP [Ag(ATCA)ClO4]n (1) successfully synthesized with compact helical structure proved X-ray single-diffraction crystal data. The physicochemical property evaluation revealed that this Ag-ECCP not only completely devoid undesirable properties displayed excellent tolerance moisture noncorrosive shells, but also endowed good thermal stability safety mechanical stimulation. Moreover, theoretical calculations based standard molar enthalpy formation lead plate explosive test actual damage experiment have compound superior detonation performance (up 6800 m s-1 0.511 kcal g-1) compared traditional primary explosives. More importantly, laser-initiation-experiment-based femtosecond laser-testing system high-speed photography demonstrated an material great potential application detonator photosensitive initiating direct initiation, whose initiation delay is low 73 ms using 200 mJ energy.

Language: Английский

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Substitution of Nitrogen-Rich Linkers with Insensitive Linkers in Azide-Based Energetic Coordination Polymers toward Safe Energetic Materials

Crystal Growth & Design, Journal Year: 2019, Volume and Issue: 19(7), P. 3934 - 3944

Published: May 31, 2019

Primary explosives with powerful and reliable stabilities have attractive applications in the field of military civilian technologies. In this work, four two-dimensional, solvent-free metal azide-based energetic coordination polymers [M(N3)2(btze)]n (M = Co for 1, Cd 2; btze 1,2-bis(tetrazol-1-yl)ethane), [Cd2(N3)3Cl(btze)2]n 3, [Cd2(N3)2Br2(btze)2]n 4 were prepared through a hydrothermal reaction structurally characterized by single-crystal X-ray diffraction. All compounds exhibit two times higher heats detonation than that traditional lead azide (LA), high thermal (>200 °C), relatively low sensitivities. The values enthalpies formation (ΔfH°) 1 2 are up to 4.088 3.925 kJ·g–1, respectively, which belong those largest ΔfH° among metal-based primary explosives. Although isostructural compounds, their mechanical sensitivities discrepant, mainly originates from different atomic radii distinct levels repulsive steric clashes between adjacent azides. As less sensitive ligand is present place previously reported atrz (4,4′-azo-1,2,4-triazole), resultant same center lower confirmed experimental results theoretical analyses. 3 almost structures display similarities despite types amounts halogen ions ions. Compounds detonated blast. range applicable explosives, makes act as competitive safe

Language: Английский

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Molecular perovskites as a new platform for designing advanced multi-component energetic crystals

Energetic Materials Frontiers, Journal Year: 2020, Volume and Issue: 1(3-4), P. 123 - 135

Published: Dec. 1, 2020

Molecular perovskite energetic crystals, as an emerging family of promising practicable materials, have attracted increasing attentions in the past few years. Different from mainstream strategies focusing on intra-molecular designs and modifications fused-ring molecules/ions, molecular perovskites rely self-assembly diverse components into specified ternary crystal structures, hence generally could be prepared via easy scale-up process at a low cost. As kind salts, they some unique advantages energetic-material terms optimizing oxygen balance, pack efficiency (and density), decreasing hygroscopicity, achieve improved detonation performances meanwhile overcome technical weaknesses traditional binary salts. In this review, we summarize current findings understandings provide outlook for new opportunities brought by material towards advanced multi-component crystals.

Language: Английский

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New Promises from an Old Friend: Iodine-Rich Compounds as Prospective Energetic Biocidal Agents

Accounts of Chemical Research, Journal Year: 2020, Volume and Issue: 54(2), P. 332 - 343

Published: Dec. 10, 2020

ConspectusFor a very long time, frequent occurrences of biocrises have wreaked havoc on human beings, animals, and the environment. As result, it is necessary to develop biocidal agents destroy or neutralize active by releasing large amounts strong biocides which are obtained upon detonation. Iodine an efficient agent for bacteria, fungi, yeasts, viruses, spores, protozoan parasites, sole element in periodic table that can microbes without contaminating Based chemical biology, mechanism iodine as bactericide may arise from oxidation iodination reactions cellular proteins nucleic acids. However, because high vapor pressure causing elemental sublime readily at room temperature, inconvenient use this material its normal solid state directly under ambient conditions. Iodine-rich compounds where firmly bonded molecules C–I I–O moiety been observed be among most promising energetic compounds. Gaseous products comprised iodine-containing components released decomposition explosion iodine-rich Because detonation pressure, species distributed over area greatly improving efficacy system requiring considerably less effort compared traditional methods. The commercially available tetraiodomethane tetraiodoethene, possess superb content also disadvantages volatility, light sensitivity, chemically reactivity, therefore, not suitable agents. It absolutely critical synthesize new with good thermal stabilities.In Account, we describe our strategies syntheses while maintaining maximum concomitant stability routes synthesis oxygen-containing improve oxygen balance achieve both high-energy high-iodine content. In other work, involves cocrystals, polymers were summarized. hoped Account will provide guidelines design route development inexpensive, more efficient, safer antibiological warfare future.

Language: Английский

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