1D energetic metal–organic frameworks assembled with energetic combination of furazan and tetrazole.

Two novel 1D Cd(II) energetic MOFs [Cd(NH 2 NH 2 )(AFT) 2 ·0.7H 2 O] n ( 1 ) and [Cd(ODH) 1.5 (AFT) 2 ·5H 2 O] n ( 2 ), combining the advantages of tetrazole-ring and furazan-ring, were successfully synthesized based on 2D energetic MOF [Cd(H 2 O) 2 (AFT) 2 ] n ( 3 , AFT = 4-amino-3-(5-tetrazolate)-furazan, ODH NH 2 NHCOCONHNH 2 oxalyl-dihydrazide). The crystal structures were determined by single-crystal X-ray diffraction, and fully characterized by elemental analysis and FT-IR spectroscopy. The thermal stability and impact sensitivity were also investigated. For 1 , 1D energetic MOF had an outstanding thermal stability ( T p > 300 °C) and insensitivity (IS > 24.5 J). In addition, the non-isothermal kinetics parameters, critical temperature of thermal explosion, entropy of activation, enthalpy of activation and free energy of activation were discussed in detail. For 2 , it was revealed that the each Cd(II) cation is located in a unique hepta-coordination environment. Noticeably, tetrazole-ring of AFT group presents typical monodentate coordination mode, and ODH molecule presents typical tridentate and tetradentate coordination modes, featuring a one-dimensional chain structure. Therefore, the reasonable assembly strategy plays a decisive role in energetic properties of MOF-based energetic materials. [ABSTRACT FROM AUTHOR]