Raman Spectroscopic Studies of Shock-Compressed Nitromethane and Nitromethane-D3.

摘要

Single-pulse Raman spectroscopy has been used to examine the effect of shock compression on the C-N stretching modes near 900 cm(sup (minus)1) in a 50/50 mixture of nitromethane (NM) and perdeutero nitromethane (NM-d(sub 3)). Samples were shocked in a single step to pressures as high as 6.8 GPa using a compressed gas gun driver. Spectra up to 5.5 GPa showed he expected pressure-induced shifting of the Raman frequencies; at higher pressures the lines were significantly broadened and the frequency shift was reversed, indicating the initial stages of reaction. In no instance did we see significant isotopic exchange as would be evidenced by alteration of the relative line intensities. 6 refs., 3 figs., 1 tab.