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Alleviating the Energy & Safety Contradiction to Construct New Low Sensitive and High Energetic Materials through Crystal Engineering

Abstract

Low sensitive and high energetic Materials (LSHEMs), with both high energy and sufficient safety, are highly desired in practical applications. With respect to the energy and safety, as the two most important and hottest concerns in the field of energetic materials (EMs), it is extensively deemed that there is an inevitable and inherent contradiction between them: the higher energy goes with the lower safety together. This is the so-called energy and safety (E&S) contradiction. This article highlights the contradiction and finds that the contradiction is structure-level dependent. That is, it appears most necessarily and remarkably as an inherent one only on the molecular level; while, on the crystal level and other higher ones, it can largely be alleviated. Moreover, we think that the energy and safety are originated from thermodynamics and kinetics of the decomposition reactions of EMs, respectively, and accordingly the contradiction becomes a thermodynamic-kinetic one. We thereby propose a strategy for developing LSHEMs, i.e., the nature of increasing the energy is to increase the chemical energy stored in molecules and to enhance the molecular packing compactness; while, the principle of enhancing safety is to make external stimuli more and more insufficient to ignite the EMs, through crystal engineering and mixing technologies. As an intrinsic structure of EMs, the crystal packing with face-to-face π-π stacking supported by strong interlayered intermolecular interactions favors to form LSHEMs. Or, it is proposed to enhance intermolecular interactions and the anisotropy of these interactions to build low impact sensitivity energetic crystals.

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Publication details

The article was received on 17 Nov 2017, accepted on 08 Feb 2018 and first published on 08 Feb 2018


Article type: Highlight
DOI: 10.1039/C7CE01993A
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Alleviating the Energy & Safety Contradiction to Construct New Low Sensitive and High Energetic Materials through Crystal Engineering

    F. Jiao, Y. Xiong, H. Li and C. Zhang, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C7CE01993A

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