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Fabio Zappa Dr. Manuel Beikircher Andreas Mauracher Stephan Denifl Dr. Michael Probst Prof. Dr. Natcha Injan Jumras Limtrakul Arntraud Bacher Dr. Olof Echt Prof. Dr. Tilmann D. Märk Prof. Dr. Paul Scheier Prof. Dr. Thomas A. Field Prof. Dr. Karola Graupner 《Chemphyschem》2008,9(4):607-611
A comprehensive analysis of metastable dissociation of 2,4‐dinitrotoluene (DNT) parent anions formed by attachment of electrons of controlled energy is presented. We characterize the energy dependence and kinetic energy release of the reaction which competes with autodetachment. A surprising finding is a highly exothermic metastable reaction triggered by the attachment of thermal electrons which we relate to the well‐known electrostatic ignition hazards of DNT and other explosives. Quantum chemical calculations are performed for dinitrobenzene in order to elucidate the process of NO abstraction. 相似文献
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Chemical constituents of crude ethyl acetate extract of roots of Akschindlium godefroyanum (Kuntze) H. Ohashi were investigated and seven flavonoids were isolated. Their structures were identified based on spectroscopic methods as well as by comparison with spectral data reported in the literature as six flavanonols and a flavonol including 7,4′-dihydroxy-5,3′-dimethoxyflavanonol (1), neophellamuretin (2), taxifolin (3), erycibenin D (4), geraldol (5), fustin (6) and garbanzol (7). Compounds 2, 4 and 7 were found in the genus Akschindlium for the first time. Compounds 3, 5 and 6 appeared to have free radical scavenging activities using DPPH assay with IC50 of 21, 40 and 15 μg/mL, respectively. 相似文献
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