The Experts below are selected from a list of 4497 Experts worldwide ranked by ideXlab platform
Xingcheng Zhang - One of the best experts on this subject based on the ideXlab platform.
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2 fluoro 1 3 diamino 4 6 Dinitrobenzene zxc 7 and 2 fluoro 1 3 5 triamino 4 6 Dinitrobenzene zxc 8 thermally stable explosives with outstanding properties
ChemPlusChem, 2019Co-Authors: Zheng Zhang, Qiuju Zhou, Xingcheng ZhangAbstract:Two novel, thermally stable explosives, 2-fluoro-1,3-diamino-4,6-Dinitrobenzene (ZXC-7) and 2-fluoro-1,3,5-triamino-4,6-Dinitrobenzene (ZXC-8), are reported. These two compounds can be prepared by means of simple synthetic methods and they show outstanding properties (detonation velocity, detonation pressure, sensitivity toward mechanical stimuli, and temperature of decomposition). Their structures are very similar to that of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). They were isolated and characterized by means of mass spectrometry and multinuclear (1 H, 13 C) NMR spectroscopy. The structure of ZXC-7 in the crystalline state was determined by low-temperature single-crystal X-ray diffraction. From the calculated standard molar enthalpy of formation (CBS-4 M) and the densities (which were determined by a gas pycnometer), the Chapman-Jouguet detonation properties were predicted by using the EXPLO5 V6.01 thermochemical computer code. The sensitivities of ZXC-7 and ZXC-8 towards impact and friction were determined.
Zheng Zhang - One of the best experts on this subject based on the ideXlab platform.
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2 fluoro 1 3 diamino 4 6 Dinitrobenzene zxc 7 and 2 fluoro 1 3 5 triamino 4 6 Dinitrobenzene zxc 8 thermally stable explosives with outstanding properties
ChemPlusChem, 2019Co-Authors: Zheng Zhang, Qiuju Zhou, Xingcheng ZhangAbstract:Two novel, thermally stable explosives, 2-fluoro-1,3-diamino-4,6-Dinitrobenzene (ZXC-7) and 2-fluoro-1,3,5-triamino-4,6-Dinitrobenzene (ZXC-8), are reported. These two compounds can be prepared by means of simple synthetic methods and they show outstanding properties (detonation velocity, detonation pressure, sensitivity toward mechanical stimuli, and temperature of decomposition). Their structures are very similar to that of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). They were isolated and characterized by means of mass spectrometry and multinuclear (1 H, 13 C) NMR spectroscopy. The structure of ZXC-7 in the crystalline state was determined by low-temperature single-crystal X-ray diffraction. From the calculated standard molar enthalpy of formation (CBS-4 M) and the densities (which were determined by a gas pycnometer), the Chapman-Jouguet detonation properties were predicted by using the EXPLO5 V6.01 thermochemical computer code. The sensitivities of ZXC-7 and ZXC-8 towards impact and friction were determined.
Qiuju Zhou - One of the best experts on this subject based on the ideXlab platform.
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2 fluoro 1 3 diamino 4 6 Dinitrobenzene zxc 7 and 2 fluoro 1 3 5 triamino 4 6 Dinitrobenzene zxc 8 thermally stable explosives with outstanding properties
ChemPlusChem, 2019Co-Authors: Zheng Zhang, Qiuju Zhou, Xingcheng ZhangAbstract:Two novel, thermally stable explosives, 2-fluoro-1,3-diamino-4,6-Dinitrobenzene (ZXC-7) and 2-fluoro-1,3,5-triamino-4,6-Dinitrobenzene (ZXC-8), are reported. These two compounds can be prepared by means of simple synthetic methods and they show outstanding properties (detonation velocity, detonation pressure, sensitivity toward mechanical stimuli, and temperature of decomposition). Their structures are very similar to that of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). They were isolated and characterized by means of mass spectrometry and multinuclear (1 H, 13 C) NMR spectroscopy. The structure of ZXC-7 in the crystalline state was determined by low-temperature single-crystal X-ray diffraction. From the calculated standard molar enthalpy of formation (CBS-4 M) and the densities (which were determined by a gas pycnometer), the Chapman-Jouguet detonation properties were predicted by using the EXPLO5 V6.01 thermochemical computer code. The sensitivities of ZXC-7 and ZXC-8 towards impact and friction were determined.
Stephen F Nelsen - One of the best experts on this subject based on the ideXlab platform.
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effect of ortho substitution on the charge localization of Dinitrobenzene radical anions
Journal of Physical Chemistry A, 2011Co-Authors: Joao P Telo, Almaz S Jalilov, Stephen F NelsenAbstract:Optical and electron paramagnetic resonance spectroscopies were used to study the radical anions of several m-Dinitrobenzenes and p-Dinitrobenzenes with substituents on ortho positions relative to the nitro groups. 1,4-Dinitrobenzene, 1,4-dimethyl-2,5-Dinitrobenzene, and 2,5-Dinitrobenzene-1,4- diamine radical anions are delocalized (class III) mixed valence species, but in the dinitrodurene radical anion the nitro groups are forced out of the ring plane due to the steric hindrance, which results in localization of the charge. The radical anions m-Dinitrobenzene, 2,6-dinitrotoluene, and dinitromesitylene are all localized (class II) mixed valence species, as is common for m-Dinitrobenzenes, and the rate of intramolecular electron transfer reaction strongly decreases with the number of methyl substituents.Thesamemechanismofrotationofthenitrogroupsoutoftheringplaneduetosterichindrancecausedbyneighboring methyl groups is also responsible for slowing the reaction. However, 2,6-dinitroaniline radical anion and 2,6-dinitrophenoxide radical dianion are charge-delocalized because the strong electron releasing amino and oxido groups increase the conjugation between the two charge-bearing units.
Kazuyuki Furuta - One of the best experts on this subject based on the ideXlab platform.
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1 fluoro 2 4 Dinitrobenzene and its derivatives act as secretagogues on rodent mast cells
European Journal of Immunology, 2017Co-Authors: Yohei Manabe, Marie Yoshimura, Kazuma Sakamaki, Asuka Inoue, Aya Kakinoki, Satoshi Hokari, Mariko Sakanaka, Junken Aoki, Hiroyuki Miyachi, Kazuyuki FurutaAbstract:Accumulating evidence suggests that activated mast cells are involved in contact hypersensitivity, although the precise mechanisms of their activation are still not completely understood. We investigated the potential of common experimental allergens to induce mast cell activation using murine bone marrow-derived cultured mast cells and rat peritoneal mast cells. Among these allergens, 1-chloro-2,4-Dinitrobenzene and 1-fluoro-2,4-dinirobenzene (DNFB) were found to induce degranulation of rat peritoneal mast cells. DNFB-induced degranulation is accompanied by cytosolic Ca2+ mobilization and is significantly inhibited by pertussis toxin, U73122 (a phospholipase C inhibitor), and BAPTA (a Ca2+ chelator), raising the possibility that DNFB acts on the G protein-coupled receptors and activates Gi , which induces activation of phospholipase C, as well as known mast cell secretagogues, such as compound 48/80. DNFB could induce mast cell degranulation in the absence of serum proteins and IgE. Structure-activity relationship analyses revealed an inverse correlation between the degree of degranulation and the electron density of the C1 carbon of the DNFB derivatives. These findings raise a possibility that DNFB functions as a potent contact allergen through induction of cutaneous mast cell degranulation.