Dynamic observation of a thermally activated structure change in 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) by second harmonic generation

Article Abstract:

1,3,5-triamino-2,4,6-trinitrobenze (TATB) tend to manifest substantial structural change in its energetic material upon the application of heat. Results derived from an optical second harmonic generation (SHG) analysis revealed that such a change is relatively similar to the thermal decomposition of octahydro-1,3,5,7-tetranitor-1,3,5,7-tetrazocine. Such a phenomenon implies that the occurrence of solid structure transitions may be accompanied by chemical decomposition processes, which give rise to variations in SHG intensity.

Usage, Chemical structure, Harmonic analysis, Harmonic analysis (Mathematics)

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Static TOF-SIMS surface analysis of a CCL2F2 activated chromia catalyst used for a CI/F exchange reaction

Article Abstract:

Static TOF-SIMS results strongly underpin earlier conclusions from ESCA, XANES, and tracer studies that the accumulation of fluorine and chlorine at the surface of chromia by a heterogeneous reaction with a chlorofluorocarbon compound results in the formation of mixed chromium oxide halide species and not in the nucleation of CrCl3 and/or CrF3 phases.

Chlorofluorocarbons, Chromogenic compounds, Activated charcoal

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Pattern selection in the Belousov-Zhabotinsky reaction with the addition of an activating reactant

Article Abstract:

The competition between target waves and spiral waves when the system was in an oscillatory state is studied using the ferroin-catalyzed Belosov-Zhabotinsky reaction with the addition of an activating reactant in a reaction-diffusion system. Numerical simulations are carried out using a modified Oregonator model.

Chemical reaction, Rate of, Chemical kinetics, Belousov-Zhabotinskii reaction

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