Based On The Construction Of Energetic Bridging Group Bistetrazole Metal-organic Framework

Tetrazole compounds with a positive formation enthalpy,high density,high gas production rate,low sensitivity,and many other excellent properties,are a kind of promising energetic materials due to a lot of N-N,N=N,and C-N bonds.Meanwhile Tetrazoles and their derivatives attract much attention used as ligands in complex since they are multidentate ligands which tend to form multinuclear or multidimensional complexes with a higher density,lower sensitivity and outstanding thermal stability,and further expand the application field.Currently,Tetrazole compounds have been used as primary explosives,propellant,gas generating agent and other field.In this paper,1H,1’H-[5,5’-bitetrazole]-1,1’-diol(H2BTO)and 4,5-Bis(tetrazol-5-yl)-2H-1,2,3-triazole as two types of bridged bitetrazole were used as energetic organic ligand to coordinate with sodium,calcium,strontium,barium,cadmium,zinc,and manganese.[Mn(BTO)(H2O)2]n,[Zn(BTO)(H2O)2]n,[Ba(BTO)(H2O)2]n,[Cd(BTO)(H2O)2]n,[Sr(HBTT)2(H2O)9]n,[Ba(HBTT)(H2O)4]n,[Na(H2BTT)(H2O)2]n,[Cs2(H2BTT)2(H2O)]n,[Ca(HBTT)(H2O)]n,and[Ba3(BTT)2(H2O)9]n with different dimensions were synthesized.All of the mentioned compounds were characterized by single-crystal and powder X-ray diffraction.Moreover,the energetic properties,catalytic properties,and special response initiation for certain compound were evaluated.The results are listed as follows:(1)In the Catalytic Decomposition of Ammonium Perchlorate(AP)experiment,study shows in the decomposition process of the mixture of AP and[Mn(BTO)(H2O)2]n,the monodispersed ultrafine nano α-Mn2O3 can be obtained.[Mn(BTO)(H2O)2]n as an extraordinary catalyst precursor with advantages of security,high energy and efficient can drop the decomposition temperature of AP to 270℃,To the best of our knowledge,the catalytic performance of this in situ obtained α-Mn2O3 is by far the best.(2)In the special initiation tests,[Ba(BTO)(H2O)2]n,[Cd(BTO)(H2O)2]n show a specific response toward Nanosecond Lasers(X=1064nm)and FemtoSecond Laser(λ=800nm),both of which can be initiated by those mentioned laser with a small irradiation energy(100mJ,35mJ)in a terrific short time(3.4ps,1.5ps).Obviously,the two compounds are the novel laser ignition energetic materials.(3)The energetic properties of six compound based on H3BTT demonstrate that all of which display a versatile properties,and this kind of compounds as high energetic,low sensitive,and green energetic materials are just right meet the requirement of novel energetic materials.More interestingly,certain compounds contain alkaline earth metal show a potential application of pyrotechnic compound or flash bomb.(4)The sensitive tests of the obtained EMOGs display all of which are insensitive to external stimulus.The MOGs also can be used as micro-container to load some sensitive energetic materials in their pores,such as CL-20-Ni-MOGs.