Exploring a green and safe primary explosive to replace very toxic and sensitive lead azide and lead styphnate takes great efforts. Here, a series of polynitro-functionalized triazolylfurazanate energetic materials have been reported. These new compounds were fully characterized by infrared, multinuclear NMR spectra, mass spectra, elemental analysis, and differential scanning calorimetry measurements. The structure of mono-diaminoguanidinium salt () was determined by single-crystal X-ray diffraction. Inspired by the high pressurization rate and fast energy release in triaminoguanidinium salts, some suitability evaluation for primary explosives has been applied. Di(triaminoguanidinium) 3-nitramino-4-(3-(dinitromethanidyl)-1,2,4-triazol-5-yl)furazanate exhibits an excellent gas-generating capability ( = 9.03 Mpa) and combustion performance (d/d = 201.5 GPa s) close to fast thermite Al/CuO ( = 8.49 Mpa, d/d = 252.2 GPa s). Moreover, the good initiation capacity (60 mg for 500 mg RDX) coupled with insensitivity in this compound (IS = 17.4 J, FS = 240 N, ESD > 0.225 J) make it a promising green and insensitive primary explosive.
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http://dx.doi.org/10.1021/acsami.9b08363 | DOI Listing |
Rev Med Chil
November 2024
Escuela de Ingeniería Biomédica, Universidad de Valparaíso, Valparaíso, Chile.
Before 1990, Chile showed fewer medical schools, six in total, increasing to 13 by 2000. From then on, there was an explosive increase, reaching 29 faculties or schools by 2024. Medical students increased from 1,816 in 2010 to 3,000 by 2024.
View Article and Find Full Text PDFInorg Chem
January 2025
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
The performance of energetic coordination compounds (ECCs) is influenced by their components and structure. Modifying the chemical structure of the ligands can balance the detonation performance and sensitivity. This study introduced Cu(3-PZCA)(ClO) () and Cu(2-IZCA)(ClO) (), using 3-PZCA and 2-IZCA as ligands.
View Article and Find Full Text PDFCurr Top Med Chem
January 2025
Universidade Federal Fluminense, Instituto de Biologia, Laboratório de Virologia Molecular e Biotecnologia Marinha, 24210-200, Niterói-RJ, Brasil.
Background: Zika (ZIKV) is a virus transmitted by mosquitoes that can cause Guillain- Barré syndrome and congenital malformations like microcephaly. Given its explosive resurgence and the resulting epidemics in 2016, the search for effective antiviral drugs has become absolutely necessary.
Methods: In this study, we examined the potential of naphthoquinone derivatives that have a sulfonamide or sulfonate group to inhibit ZIKV replication in primary cultured neurons and in Vero cells.
Chemosphere
January 2025
GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148, Kiel, Germany; Christian-Albrechts University Kiel, Institute of Geosciences, Ludewig-Meyn-Str, 24118, Kiel, Germany.
Relic munitions from warfare and intentional dumping contaminate coastal waters worldwide, with an estimated 300,000 tons in the German Baltic Sea alone. These contain toxic conventional explosive chemicals, including 2,4,6-trinitrotoluene (TNT), 1,3,5-trinitro-1,3,5-triazinane (RDX), and 1,3-dinitrobenzene (DNB). Corrosion of metal munition housings in seawater releases these munition chemicals (MCs) to the marine environment.
View Article and Find Full Text PDFJ Mol Model
January 2025
Shanxi Jiangyang Chemical Industry Corporation, Taiyuan, 030041, Shanxi, China.
Context: To address the issue that the output charge in existing Deflagration to Detonation Transition (DDT) detonators cannot withstand high temperatures of 200 °C, and to improve the output performance of the detonator, a CL-20 (Hexanitrohexaazaisowurtzitane) based polymer bonded explosive (PBX) was investigated as the primary charge material for the detonator. To select the most suitable binder for thermal resistance, molecular dynamics (MD) simulations were employed to evaluate the performance of different binders at various crystal planes and temperatures. The results indicate that among the five PBXs models, CL-20/F exhibits the highest binding energy and the shortest bond initiation length at both ambient and elevated temperatures.
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