1D energetic metal–organic frameworks assembled with energetic combination of furazan and tetrazole

Coordination-Driven Heterochiral Self-Assembly: Construction of Cd(II) Coordination Polymers with Sorption Behaviors for Iodine and Dyes

“…The Cd–N and Cd–O bond lengths vary in the range of 2.304(3)–2.393(3) Å. All of the bond angles around the Cd­(II) ions are similar to other octahedral Cd­(II) complexes. , In the extended coordination environment, each Cd­(II) center is connected by four ligands with a Cd­(II)···Cd­(II) separation of 9.819 Å (Figure b). This rare coordination mode of the ligands with Cd­(II) ions leads to the formation of a 3D framework coordination polymer, which can be simplified as a (4,4) coordination network (Figure c).…”

“…This 2D structure further self-assembles via weak hydrogen bonds to form a 3D supramolecular framework (Figure 3d). 53,54 In the extended coordination environment, each Cd(II) center is connected by four ligands with a Cd(II)•••Cd(II) separation of 9.819 Å (Figure 4b). This rare coordination mode of the ligands with Cd(II) ions leads to the formation of a 3D framework coordination polymer, which can be simplified as a (4,4) coordination network (Figure 4c).…”

Thermodynamics and Catalytic Properties of Two Novel Energetic Complexes Based on 3-Amino-1,2,4-triazole-5-carboxylic Acid

“…Energetic materials (EMs) are one of the most important components of organics with an irreplaceable role in solid propellants, which possess special properties of energy storage and stability. − However, the currently used EMs, such as hexanitrohexaazaisowurtzitane (CL-20), 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), and 1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), have some limitations due to their high sensitivity or relatively low catalytic activity. Therefore, it is challenging to design and synthesize EMs with high catalytic activity, high heat of detonation, low sensitivities, and environmental acceptability. − Recently, nitrogen-rich organic materials have attracted immense attention because they produce eco-friendly N 2 gas and release enormous energy during the process of decomposition. − Nevertheless, the conflict of high energy and oxygen balance cannot be resolved completely. The valid strategy is to construct stable ligands containing poly-nitrogen and oxygen-rich fragments. , 3-Amino-1,2,4-triazole-5-carboxylic acid (Hatzc) is one of the high energetic ligands, which possesses a high nitrogen content (N % = 43.8) and possesses high enthalpy of formation from the powerful energy release of C–N, N–N, and NN bonds. , What is more, Hatzc also presents O atoms from carboxylic groups, which can provide a sufficient oxygen content during the explosion …”

Energetic Salts of Sensitive N,N′-(3,5-Dinitropyrazine-2,6-diyl)dinitramide Stabilized through Three-Dimensional Intermolecular Interactions

“…Over the past two decades, explosive growth of high-energy-density materials based on derivatives of five- or six-membered azines has occurred. − Energetic metal–organic frameworks (EMOFs) assembled from metallic nodes with nitrogen-rich azines have gained much interest because of their dense crystalline structures. − The preparation of EMOFs has undergone substantial advancement, from one-dimensional (1D) and two-dimensional (2D) EMOFs to the emergence of three-dimensional (3D) EMOFs. − Moreover, these 3D energetic frameworks possess more complex linking modes in comparison with 1D linear and 2D layered structures, which improves their structural reinforcement and molecular stabilities. − Nowadays, these 3D EMOFs play a central role in modern energetics because of their prevalent occurrence across a broad range of applications such as explosives, oxidizers, and pyrotechnics. , New EMOFs should preferably have good detonation properties, high density, and good thermal stability, along with ease of synthesis, high atom economy, and waste prevention. Therefore, tuning the structures and physicochemical properties of existing energetic structures by tailoring their properties for required applications is highly desirable …”