New compounds pack more punch
LMU chemists led by Professor Thomas M. Klapötke have synthesized two novel compounds which are markedly more efficient than those currently used in civil engineering. “These high-performance energetic substances are based on the parent molecule bispyrazolylmethane, but belong to a group of its derivatives that have not previously been described as explosive materials,” Klapötke says. The new substances, which are of interest not only for use by the military, but also have manifold applications in commercial contexts -- including oil exploration -- belong to the class of secondary explosives, which must be triggered by shock waves generated by a primary explosive.

Selected snapshots from the high-speed video of the laser excitation of the new explosive.
Klapötke
A prime example of a widely used secondary explosive is hexanitrolstilbene (HNS), whose heat tolerance makes it particularly useful in the exploration of oil-bearing formations in the hottest parts of the world. One of the most potent secondary explosives known is CL-20, but it is difficult to synthesize and therefore very expensive. The two new compounds, which Klapötke synthesized in collaboration with Dr. Jennifer Gottfried of the US Army Research Laboratory, are both suitable for use in commercial settings. They display similar levels of thermostability to, and are significantly more powerful than HNS. In fact, one of them exhibits an energy density that is comparable to that of CL-20.
Original publication
Dennis Fischer , Jennifer L. Gottfried , Thomas M. Klapötke , Konstantin Karaghiosoff , Jörg Stierstorfer , Tomasz G. Witkowski; "Synthesis and Investigation of Advanced Energetic Materials Based on Bispyrazolylmethanes"; Angew. Chem.; 2016
Dennis Fischer , Jennifer L. Gottfried , Thomas M. Klapötke , Konstantin Karaghiosoff , Jörg Stierstorfer , Tomasz G. Witkowski; "Synthesis and Investigation of Advanced Energetic Materials Based on Bispyrazolylmethanes"; Angew. Chem. Int. Ed.; 2016
Most read news
Original publication
Dennis Fischer , Jennifer L. Gottfried , Thomas M. Klapötke , Konstantin Karaghiosoff , Jörg Stierstorfer , Tomasz G. Witkowski; "Synthesis and Investigation of Advanced Energetic Materials Based on Bispyrazolylmethanes"; Angew. Chem.; 2016
Dennis Fischer , Jennifer L. Gottfried , Thomas M. Klapötke , Konstantin Karaghiosoff , Jörg Stierstorfer , Tomasz G. Witkowski; "Synthesis and Investigation of Advanced Energetic Materials Based on Bispyrazolylmethanes"; Angew. Chem. Int. Ed.; 2016
Organizations
Other news from the department science

Get the chemical industry in your inbox
By submitting this form you agree that LUMITOS AG will send you the newsletter(s) selected above by email. Your data will not be passed on to third parties. Your data will be stored and processed in accordance with our data protection regulations. LUMITOS may contact you by email for the purpose of advertising or market and opinion surveys. You can revoke your consent at any time without giving reasons to LUMITOS AG, Ernst-Augustin-Str. 2, 12489 Berlin, Germany or by e-mail at revoke@lumitos.com with effect for the future. In addition, each email contains a link to unsubscribe from the corresponding newsletter.