1,1,3,3-Tetraoxo-1,2,3-triazapropene Anion, a New Oxy Anion of Nitrogen: The Dinitramide Anion and Its Salts
摘要:
We report the synthesis of a completely new, stable class of inorganic salts named the dinitramide salts. These salts are based on a newly discovered nitrogen oxide anion known as the dinitramide anion. The dinitramide anion is a uniquely stable, high oxygen density grouping that can be prepared in many salt combinations including the ammonium or hydrazinium salts. The dinitramide anion has both fundamental scientific interest and practical applications. We describe here the synthesis of dinitramide salts and give a preliminary report on their properties.
products are often impure and require purification by recrystallization. A new approach to product separation is described that relies on the formation of an unstable, volatile by-product, such as NH4+CH3O—. This method provides very pure and anhydrous products in high yield and was demonstrated successfully for the syntheses of anhydrous cesium salts.
Thermal decomposition of ammonium dinitramide and mechanism of anomalous decay of dinitramide salts
作者:A. N. Pavlov、V. N. Grebennikov、L. D. Nazina、G. M. Nazin、G. B. Manelis
DOI:10.1007/bf02494399
日期:1999.1
Thermal decomposition of ammonium dinitramide proceedsvia homolytic rupture of the N−NO2 bond and partially by the proton transfer reaction. The monomolecular decay of the anion to N2O and NO3− in the solid state at 60 °C occurs with higher rates than those in the melt. This is related to a change in the reactivity of the anion due to the violation of its symmetry on going to the solid state. The absence
二硝胺铵的热分解通过 N-NO2 键的均裂断裂和部分通过质子转移反应进行。在 60 °C 下,阴离子单分子衰变为固态的 N2O 和 NO3−,其发生率高于熔体中的衰变率。这与阴离子反应性的变化有关,因为它在进入固态时违反了其对称性。阴离子和阳离子或水分子之间没有氢键是快速衰变的附加条件。
Experimental Detection of Trinitramide, N(NO2)3
作者:Martin Rahm、Sergey V. Dvinskikh、István Furó、Tore Brinck
DOI:10.1002/anie.201007047
日期:2011.2.1
Propeller propellant: The largest nitrogen oxide to date, trinitramide (TNA), has been prepared following extensive quantum chemical studies in which its kinetic stability and several physical properties were estimated. TNA was detected using IR and NMR spectroscopy. The compound is highly energetic and shows promise for cryogenic propulsion and as a reagent in high‐energy‐density material research
Synthesis and kinetic analysis of isothermal and non-isothermal decomposition of ammonium dinitramide prills
作者:G. Santhosh、Ang How Ghee
DOI:10.1007/s10973-007-8941-7
日期:2008.10
Ammonium dinitramide (ADN) prills were prepared by emulsion crystallization and characterized by optical microscopic, thermogravimetric (TG) and differential scanning calorimetric (DSC) techniques. The isothermal and non-isothermal decomposition kinetics of ADN prills were studied by TG. The differential isoconversional method of Friedman (FR) and integral isoconversional method of Vyazovkin were used to investigate the dependence of activation energy (E a) with conversion (α) and the results were compared with literature data. The dependence of activation energy was also derived from isothermal data. A strong dependence of E a with α is observed for the ADN prills. All the methods showed an initial increase in E a up to α=∼0.2 and later decreases over the rest of conversion. The apparent E a values of FR method are higher than that of Vyazovkin method up to α=∼0.45. The calculated mean E a values by FR, Vyazovkin and standard isoconversional method for α between 0.05 and 0.95 were 211.0, 203.9 and 156.9 kJ mol−1, respectively.
采用乳液结晶法制备了二硝胺铵(ADN)颗粒,并通过光学显微镜、热重(TG)和差示扫描量热(DSC)技术对其进行了表征。热重法研究了 ADN 颗粒的等温和非等温分解动力学。使用弗里德曼(FR)的微分等转化法和维亚佐夫金(Vyazovkin)的积分等转化法研究了活化能(E a)与转化率(α)的关系,并将结果与文献数据进行了比较。活化能的依赖性也是根据等温数据得出的。在 ADN 磨碎物中,E a 与 α 的依赖性很强。在 α=∼0.2 的范围内,所有方法都显示出 E a 的初始增加,随后在剩余的转化过程中逐渐减小。在 α=∼0.45 时,FR 方法的表观 E a 值高于 Vyazovkin 方法。用 FR 法、维亚佐夫金法和标准等转化法计算的 α 在 0.05 至 0.95 之间的平均 E a 值分别为 211.0、203.9 和 156.9 kJ mol-1。
New technology for preparing energetic materials by nanofiltration membrane (NF): rapid and efficient preparation of high-purity ammonium dinitramide (ADN)
作者:Hai-Yang Zhu、Ying-Hui Liu、Hai-Yun Sun、Dan-Dan Cao、Yu-Chuan Li、Si-Ping Pang
DOI:10.1039/d3ra01922e
日期:——
friendly, and economical production is very important to the national economy and national security. As an innovative, efficient, and environmentally friendly energetic material, the preferred preparation method of ammonium dinitramide (ADN) is the nitro-sulfur mixed acid method, which has the advantages of high yield, simple method, and easy access to raw materials. However, the large number of inorganic