Study of Six Green Insensitive High Energetic Coordination Polymers Based on Alkali/Alkali-Earth Metals and 4,5-Bis(tetrazol-5-yl)-2 H-1,2,3-triazole

Dong Chen; Dong Jing; Qi Zhang; Xianggui Xue; Shaohua Gou; Hongzhen Li; Fude Nie

doi:10.1002/asia.201701052

Study of Six Green Insensitive High Energetic Coordination Polymers Based on Alkali/Alkali-Earth Metals and 4,5-Bis(tetrazol-5-yl)-2 H-1,2,3-triazole

Chem Asian J. 2017 Dec 14;12(24):3141-3149. doi: 10.1002/asia.201701052. Epub 2017 Oct 24.

Authors

Dong Chen¹, Dong Jing^{1

2}, Qi Zhang¹, Xianggui Xue¹, Shaohua Gou², Hongzhen Li¹, Fude Nie¹

Affiliations

¹ Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan, Mianyang, 621900, China.
² College of Chemistry and Chemical Engineering, Southwest Petroleum University, Sichuan, Chengdu, 610500, China.

PMID: 28941360
DOI: 10.1002/asia.201701052

Abstract

Constructing insensitive high-performance energetic coordination polymers (ECPs) with alkali/alkali-earth metal ions and a nitrogen-rich organic backbone has been proved to be a feasible strategy in this work. Six diverse dimensional novel ECPs (compounds 1-6) were successfully synthesized from Na^I , Cs^I , Ca^II , Sr^II , Ba^II ions and a nitrogen-rich triheterocyclic 4,5-bis(tetrazol-5-yl)-2 H-1,2,3-triazole (H₃ BTT). All compounds show outstanding stability and low sensitivity, the thermal stability of these ECPs are significantly improved as the structural reinforcement increases from 1D to 3D, in which the decomposition temperature of 3D Ba^II based compound 6 is as high as 397 °C. Long-term storage experiments show that compounds 5 and 6 are stable enough at high temperature. Moreover, the six compounds hold considerable detonation performances, in which Ca^II based compound 5 possesses the detonation velocity of 9.12 km s^-1 , along with the detonation pressure of 34.51 GPa, exceeding those of most energetic coordination polymers. Burn tests further certify that the six compounds can be versatile pyrotechnics.

Keywords: alkali metals; energetic materials; insensitive explosives; polymers; pyrotechnics.