Dissociative Electron Attachment to the Nitroamine HMX (Octahydro-1,3,5,7-Tetranitro-1,3,5,7-Tetrazocine)
Dissociative Electron Attachment to the Nitroamine HMX (Octahydro-1,3,5,7-Tetranitro-1,3,5,7-Tetrazocine)
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DOI：
10.1007/s13361-013-0588-y
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发表时间：
2013-03
影响因子：
3.2
通讯作者：
J. Postler;M. Goulart;C. Matias;A. Mauracher;F. F. Silva-F.;P. Scheier;P. Limão-Vieira;S. Denifl
中科院分区：
文献类型：
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作者：
J. Postler;M. Goulart;C. Matias;A. Mauracher;F. F. Silva-F.;P. Scheier;P. Limão-Vieira;S. Denifl
在本研究中，用交叉电子-分子束实验方法测量了HMX-octahydro-1，3，5，7-tetranitro-1，3，5，7-tetrazocine，C4H8N8O8气相的离解电子吸附。最强的信号在46u和176u处观察到，并分别分配给NO_2−和C_3H_6N_5O_4−。在电子能区测量了15个带负电荷碎片的阴离子效率曲线，能量分辨率约为0.7 eV。产物阴离子主要在低能区观察到，接近0 eV，由与多个键断裂以及结构和电子重排相关的令人惊讶的复杂反应引起。HMX对动能几乎为零的电子吸附的显著不稳定反映了这种化合物的高度爆炸性。在基于自由电子捕获的负离子质谱仪中，常见碎片阴离子的显著不同的共振强度比允许区分硝胺HMX和皇家拆毁爆炸分子(RDX)。
In the present study, dissociative electron attachment (DEA) measurements with gas phase HMX, octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine, C4H8N8O8, have been performed by means of a crossed electron-molecular beam experiment. The most intense signals are observed at 46 and 176 u and assigned to NO2−and C3H6N5O4−, respectively. Anion efficiency curves for 15 negatively charged fragments have been measured in the electron energy region from about 0–20 eV with an energy resolution of ~0.7 eV. Product anions are observed mainly in the low energy region, near 0 eV, arising from surprisingly complex reactions associated with multiple bond cleavages and structural and electronic rearrangement. The remarkable instability of HMX towards electron attachment with virtually zero kinetic energy reflects the highly explosive nature of this compound. Substantially different intensity ratios of resonances for common fragment anions allow distinguishing the nitroamines HMX and royal demolition explosive molecule (RDX) in negative ion mass spectrometry based on free electron capture.