Extra contribution to the crystal stability of insensitive explosive TATB: The cooperativity of intermolecular interactions  

作　　者：Zhi-xiang Zhang Yi-tao Si Tao Yu Wei-peng Lai Yi-ding Ma Mao-chang Liu Ying-zhe Liu Bo-zhou Wang 

机构地区：[1]State Key Laboratory of Fluorine&Nitrogen Chemicals,Xi'an Modern Chemistry Research Institute,Xi'an,710065,PR China [2]International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an,710049,PR China

出　　处：《Defence Technology（防务技术）》2023年第7期88-98,共11页Defence Technology

基　　金：the support from the National Natural Science Foundation of China (No. 21875184);the Natural Science Foundation of Shaanxi Province (No. 2022JC-10);Youth Talent of Shaanxi “TeZhi” Program。

摘　　要：An in-depth analysis on the cooperativity of intermolecular interactions including hydrogen bonding andπ-π stacking in 1,3,5-triamino-2,4,6-trinitrobenzene(TATB) crystal was studied. Two quantities, cooperativity rate and energy, were defined to evaluate the nature and strength of cooperativity in a series of clusters diverging from 1D to 3D prototypes. The origin and mechanism of the cooperative effect were settled to demonstrate that the nature of cooperativity is determined by whether the non-covalent interactions compete or promote with each other, which is manifested by the changing trend of electron transfer. There exists obvious cooperative effect in intra-layer and inter-layer structures as they own the equivalent non-covalent interactions, while anti-cooperative effect is also observed if two interactions correlate with each other. On the whole, in the process of crystal formation, the apparent cooperativity is the check and balance of the two effects, which is capable to support a global interaction among all of molecules and contribute to the stabilization of system. Based on the results, one may get a new insight to understand the relationship between non-covalent interactions and low impact sensitivity.

关 键 词：COOPERATIVITY Non-covalent interaction Low-sensitivity Explosives Charge transfer 

分 类 号：TQ560.1[化学工程—炸药化工]