含能阳离子重构氢键网络实现4,4′,5,5′-四硝基-2,2′-联咪唑的性能提升OA

4,4',5,5'-Tetranitro-2,2'-biimidazole(TNBI),as an energetic material with excellent overall performance,exhibits promising application potential.However,its significant hygroscopicity severely limits practical application,primarily due to the acidic hydrogen atoms in its molecular structure that readily form hydrogen bonding networks with water.To address this issue,the insensitive explosive 3-amino-4-(4,5-diamino-1,2,4-triazol-3-yl)furazan(TATF)was employed to replace the hydrogen bonding network between TNBI and water molecules,forming a TNBI-TATF energetic ionic salt.The structure and properties of the new compound were characterized by hygroscopicity experiments,nuclear magnetic resonance(NMR),Fourier transform infrared spectroscopy(FTIR),simultaneous thermogravimetric analysis-differential scanning calorimetry(TGA-DSC),and single-crystal X-ray diffractometry.Results show that TNBI²⁻ and TATF⁺ form a dense and highly directional hydrogen bonding network,guiding the crystal to adopt a layered packing arrangement.This layered structure buffers and absorbs external mechani-cal impact through a"slip"mechanism,thereby reducing mechanical sensitivity.Consequently,TNBI-TATF possesses both fa-vorable detonation performance and stability.