Glascoe Elizabeth A, Zaug Joseph M, Armstrong Michael R, Crowhurst Jonathan C, Grant Christian D, Fried Laurence E
Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA.
J Phys Chem A. 2009 May 21;113(20):5881-7. doi: 10.1021/jp809418a.
The time scale and/or products of photoinduced decomposition of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) were investigated at ambient pressure and compared with products formed at 8 GPa. Ultrafast time-resolved infrared and steady-state Fourier transform IR (FTIR) spectroscopies were used to probe TATB and its products after photoexcitation with a 5 ns pulse of 532 nm light. At ambient pressure, transient spectra of TATB indicate that the molecule has significantly decomposed within 60 ns; transient spectra also indicate that formation of CO(2), an observed decomposition product, is complete within 30-40 mus. Proof of principle time-resolved experiments at elevated pressures were performed and are discussed briefly. Comparison of steady-state FTIR spectra obtained at ambient and elevated pressure (ca. 8 GPa) indicate that the decomposition products vary with pressure. We find evidence for water as a decomposition product only at elevated pressure.
在常压下研究了1,3,5-三氨基-2,4,6-三硝基苯（TATB）光致分解的时间尺度和/或产物，并与在8 GPa下形成的产物进行了比较。利用超快时间分辨红外光谱和稳态傅里叶变换红外（FTIR）光谱，用532 nm光的5 ns脉冲对TATB及其光激发后的产物进行探测。在常压下，TATB的瞬态光谱表明该分子在60 ns内已显著分解；瞬态光谱还表明，观察到的分解产物CO(2)在30 - 40 μs内形成完毕。进行了高压下原理性时间分辨实验并简要讨论。对常压和高压（约8 GPa）下获得的稳态FTIR光谱进行比较表明，分解产物随压力而变化。我们发现只有在高压下才有水作为分解产物的证据。
