Fascinating 3D energetic [Ag2(N5)2(EDA)]n: filling the ethylenediamine molecules into a [Ag(N5)]n framework

An interesting 3D energetic motif based on Ag(i) ion, cyclo-pentazolate anion (cyclo-N-5(-)) and ethylenediamine (EDA), namely, [Ag-2(N-5)(2)(EDA)](n), was prepared by embedding the ethylenediamine molecules into the [Ag(N-5)](n) structure. The architecture was determined by single-crystal X-ray diffraction. The onset decomposition temperature of [Ag-2(N-5)(2)(EDA)](n) was 6.4 degrees C higher than that of [Ag(N-5)](n) and 14.6 degrees C higher than that of [Ag-3(N-5)(4)](n)center dot n[Ag(NH3)(2)]. The detonation performance (D = 6.272 km s(-1), P = 23.51 GPa) of [Ag-2(N-5)(2)(EDA)](n) was between that of [Ag(N-5)](n) and [Ag-3(N-5)(4)](n)center dot n[Ag(NH3)(2)]. The insertion of EDA molecules resulted in a significant reduction of the mechanical sensitivity compared with extremely sensitive [Ag(N-5)](n). It is an effective way to improve the stability of pentazolate complexes using amino-containing small molecules with cyclo-N-5(-) to form bi-ligand energetic metal-inorganic frameworks.

Automated summary

An interesting 3D energetic motif based on Ag(i) ion, cyclo-pentazolate anion (cyclo-N-5(-)) and ethylenediamine (EDA) was prepared. The addition of EDA molecules increased the onset decomposition temperature and reduced the mechanical sensitivity of the material. The detonation performance was between the two counterparts.