The skeleton of 5,7-fused bicyclic imidazole-diazepine for heat-resistant energetic materials  

作　　者：Xiaoxiao Zheng Yubing Xue Changhao Dai Hongwei Yang Guangbin Cheng 

机构地区：[1]School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China

出　　处：《Defence Technology（防务技术）》2023年第9期193-199,共7页Defence Technology

基　　金：support from the National Natural Science Foundation of China(Grant No.22075143,21875110);the Science Challenge Project(Grant No.TZ2018004);the Qing Lan Project for the grant。

摘　　要：In light of the low yields and complex reaction routes of some well-known 5,5-fused and 5,6-fused bicyclic compounds,a series of 5,7-fused bicyclic imidazole-diazepine compounds were developed with high yields by only two efficient steps.Significantly,the seven-membered heterocyclic ring has a stable energetic skeleton with multiple modifiable sites.However,the 5,7-fused bicyclic energetic compounds were rarely reported in the area of energetic materials.Three neutral compounds 1,2 and 4 were synthesized in this work.To improve the detonation performances of the 5,7-fused neutral compounds,corresponding perchlorate 1a and 2a were further developed.The physicochemical and energetic performances of all newly developed compounds were experimentally determined.All newly prepared energetic compounds exhibit high decomposition temperatures(Td:243.8-336℃)and low mechanical sensitivities(IS:>15 J,FS:>280 N).Among them,the velocities performances of 1a(Dv=7651 m/s)and 4(Dv=7600 m/s)are comparable to that of typical heat-resistant energetic material HNS(Dv=7612 m/s).Meanwhile,the high decomposition temperature and low mechanical sensitivities(Td=336℃;IS=32 J;FS>353 N)of 4 are superior to that of HNS(Td=318℃;IS=5 J;FS=250 N).Hence,the 5,7-fused bicyclic compounds with high thermostability,low sensitivities and adjustable detonation performance have a clear tendency to open up a new space for the development of heat-resistant energetic materials.

关 键 词：Imidazole-diazepine Heat-resistant material 5 7-Fused skeleton Energetic materials 

分 类 号：TQ560.1[化学工程—炸药化工]