LAUSR

Abstract Two novel 1D Cd(II) energetic MOFs [Cd(NH2NH2)(AFT)2·0.7H2O]n (1) and [Cd(ODH)1.5(AFT)2·5H2O]n (2), combining the advantages of tetrazole-ring and furazan-ring, were successfully synthesized based on 2D energetic MOF [Cd(H2O)2(AFT)2]n (3, AFT = 4-amino-3-(5-tetrazolate)-furazan, ODH NH2NHCOCONHNH2 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 (Tp > 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.