六硝基菧的紫外光解

Ultraviolet photodecomposition of HNS

采用紫外-可见光谱、X-射线光电子能谱、电子自旋共振谱及质谱等实验手段研究了固态含能材料六硝基菧(HNS)在365nm紫外光照下的光解机理。HNS的乙腈溶液被紫外光照射后,在310nm和350nm处出现了两个新的吸收峰。X-射线光电子能谱实验中,N元素和O元素的窄谱图分别在401eV和528eV处出现了新峰。质谱分析则显示在质荷比403和329处出现了两个新的特征离子峰。实验结果表明:C—NO2键断裂、分子中—NO2基团异构化为亚硝基,以及随后的NO消去等过程均可能发生在六硝基菧的紫外光解反应过程中。

The ultraviolet （UV） photodecomposition of solid HNS （2, 2＇, 4, 4＇, 6, 6＇-hexanitrostillbene） under irradiation of UV light has been studied by different experimental means, including UV Vis spectra, X ray photoelectron spectroscopy （Xt^S）, electron paramagnetic resonance spectra （EPR） and mass spectra （MS）. Two new peaks locating around 310 nm and 350 nm appear in the UV Vis spectra of HNS/acetonitrile solution after UV light irradiation. Similarly, after laser irradiation, two nee~ peaks ~ppear at the binding energy of 401 eV and 528 eV for N ls and O ls XPS narrow scan spectra, respectively. Further- more, the mass spectrum shows two new characteristic ion peaks corresponding to mass-charge ratio of 403 and 329. Experimen- tal results indicate that C NO2 broken and nitro nitrite isomerization with subsequent release of ~ NO are the main photolysis pathways during the photodecomposition of HNS.