Energetic coordination compounds of late 3d metals with 1N-(Nitromethyl)-5H-tetrazole, a ligand with astonishing properties from the rare class of N-nitromethyl azoles

Crystal Growth & Design

Dong

et al. 2023

Eight kinds of energetic coordination polymers (ECPs) with multi-coordination were designed and synthesized by combining the carbonyl group with coordination potential in biuret with transition metal nitrates and perchlorates (Co2+, Ni2+, Cu2+, and Ag+). The structures of these complexes are confirmed by infrared spectroscopy, elemental analysis, and X-ray single-crystal diffraction. The physical and chemical performance test results show that the solvent-free ECPs 7 (Cu(BIU)2(ClO4)2) has the best performance (T dec = 328 °C, D = 7600 km·s–1, P = 27.8 Gpa, IS = 25 J, FS = 240 N). Among them, ECPs 7 and 8 (Ag(BIU)ClO4) have good detonation performance during hot plate and laser ignition tests (ECPs 7: P = 15 W, τ = 6 ms, E = 80 mJ; ECPs 8: P = 20 W, τ = 5 ms, E = 100 mJ). The result shows that improving the oxygen balance of ligands and constructing multidentate coordination structures may be a new effective strategy for improving the performance of laser-sensitive ECPs.

Section: Introductionmentioning

confidence: 99%

Tailoring Transition Metals and Biuret into Laser-Ignitable Energetic Coordination Polymers with Improved Oxygen Balance and Multidentate Coordination Structures

Zhang

Crystal Growth & Design

Dong

et al. 2023

“…6−10 Klapoẗke has made outstanding contributions in this field. Specifically, they used tetrazole derivatives as ligands to prepare a series of ECCs, such as [Cu(1-VTZ) 6 ](ClO 4 ) 2 , 11 [Cu(1-NMT) 6 ](ClO 4 ) 2 , 12 and [Cu(1-NET) 6 ](ClO 4 ) 2 13 (1-VTZ: 1-vinyl-5H-tetrazole, 1-NMT: 1N-(nitromethyl)-5H-tetrazole, 1-NET: 1-nitratoethyl-5H-tetrazole). Not surprisingly, these ECCs have the potential to be used as primary explosives.…”

Section: Introductionmentioning

confidence: 99%

“…In nitrogen-rich materials, energetic coordination compounds (ECCs) with unique coordination structures have attracted the attention of scientists due to their simple preparation, high product purity, and excellent explosive performance. − Klapötke has made outstanding contributions in this field. Specifically, they used tetrazole derivatives as ligands to prepare a series of ECCs, such as [Cu(1-VTZ) 6 ](ClO 4 ) 2 , [Cu(1-NMT) 6 ](ClO 4 ) 2 , and [Cu(1-NET) 6 ](ClO 4 ) 2 (1-VTZ: 1-vinyl-5 H -tetrazole, 1-NMT: 1N-(nitromethyl)-5 H -tetrazole, 1-NET: 1-nitratoethyl-5 H -tetrazole). Not surprisingly, these ECCs have the potential to be used as primary explosives.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Primary Explosive by Self-assembly of Combustible and Oxidizing Agents under Acid

Xie

et al. 2023

Inorg. Chem.

In order to further explore the effect of ligands on the performance of primary explosives and gain a deeper understanding of the coordination mechanism, we designed furan-2-carbohydrazide (FRCA), a ligand, by using oxygen-containing heterocycles and carbohydrazide. Then, FRCA and Cu(ClO4)2 were used to synthesize coordination compounds [Cu(FRCA)2(H2O)(ClO4)2]·CH3OH (ECCs-1·CH 3 OH) and Cu(FRCA)2(H2O)(ClO4)2 (ECCs-1). The structure of the ECCs-1 was confirmed by single-crystal X-ray diffraction, IR and EA characterization. Further experiments on ECCs-1 show that ECCs-1 has good thermal stability, but is sensitive to mechanical stimuli (impact sensitivity = IS = 8 J, friction sensitivity = FS = 20 N). The predicted value of the detonation parameter is D EXPLO 5 = 6.6 km s–1, P EXPLO 5 = 18.8 GPa, but the ignition test, laser test, and lead plate detonation experiment show that ECCs-1 has excellent detonation performance, which is very worthy of attention.

“…With the deepening of research, multidisciplinary development, and new requirements, more and more new materials have been used in primary explosives. , Among them, energetic coordination compounds (ECCs) have entered the perspective of researchers due to their unique structure and performance advantages . Because of its simple preparation, good performance, easy amplification, and high purity, it is favored by researchers, and Klapötke has made outstanding contributions in this regard. − …”

Section: Introductionmentioning

confidence: 99%

Study on Primary Explosive: Cu(ClO₄)₂-Based Energetic Coordination Compounds as a Template

Crystal Growth & Design

et al. 2023

In order to study the design and preparation of new coordination primary explosive, the influence of ligand on the performance was explored. Using the low-energy, low-nitrogen pyrrole as the skeleton and the hydrazide group as the target, the ligand 1H-pyrrole-2-carbohydrazide (PRCA) was designed, the two ECCs [Cu(PRCA)2(H2O)(ClO4)]ClO4·C2H5OH (ECCs-1·C 2 H 5 OH) and [Cu(PRCA)2(H2O)(ClO4)]ClO4·2H2O (ECCs-1·2H 2 O) were prepared, and [Cu(PRCA)2(H2O)(ClO4)]ClO4 (ECCs-1) was obtained by a simple drying method. The structure of the target compound was confirmed by single-crystal X-ray diffraction, infrared (IR), and elemental analysis (EA) characterization. Physicochemical performance tests show that ECCs-1 has better thermal stability (T d = 219 °C) and is more sensitive to impact sensitivity (IS = 7 J) and friction sensitivity (FS = 16 N). The detonation performance prediction results show that the detonation velocity and pressure of ECCs-1 are not high (D EXPLO 5 = 6.2 km s–1, P EXPLO 5 = 16.2 GPa). However, detonation performance tests show that ECCs-1 has an extremely strong detonation ability.