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 ?-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 ?-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(?=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.