Thermochemical properties and thermokinetic behavior of energetic triazole ionic salts

Abstract

The properties of dissolution in different solvents, the specific heat capacity and thermal decomposition process under the non-isothermal conditions for energetic triazole ionic salts 1,2,4-triazolium nitrate (1a), 1,2,3-triazolium nitrate (1b), 3,4,5-triamino-1,2,4-triazolium nitrate (2a), 3,4,5-triamino-1,2,4-triazolium dinitramide (2b) were precisely measured using a Calvet Microcalorimeter. The thermochemical equation, differential enthalpies of dissolution, apparent activation energy (E), pre-exponential constant (A), kinetic equation, linear relationship of specific heat capacity with temperature over the temperature range from 283 to 353 K, standard molar heat capacity (C     p,m ) and enthalpy, entropy and Gibbs free energy at 283-353 K, taking 298.15 K as the benchmark for 1a, 1b, 2a and 2b were obtained with treating experimental data and theoretical calculation method. The kinetic and thermodynamic parameters of thermal decomposition reaction, critical temperature of thermal explosion (T b ), self-accelerating decomposition temperature (T SADT ) and adiabatic time-to-explosion (t) of 1a, 1b, 2a and 2b were calculated. Their heat-resistance abilities were evaluated. Information was obtained on the relation between molecular structures and properties of 1a, 1b, 2a and 2b. energetic triazole ionic salts, thermochemical properties, thermokinetic behavior, thermal safety

Physicochemical properties of 1,2,3-triazolium ionic liquids

“…This is partially due to the paucity of methyl triazole unlike 1-methylimidazole and the explosive nature of organic azides involved in the synthesis of 1,2,3-triazole. We note that a few articles on 1,2,3-triazolium ionic liquids have been published in last year, [21][22][23][24] while this manuscript was being written, but this work was done independently. These recent reports have described the two-step one pot synthesis of triazolium salts using Cu catalyzed Huisgen 1,3-dipolar cycloaddition reaction, 23 described their thermal properties 18,22 and used them as a reaction media.…”

“…We note that a few articles on 1,2,3-triazolium ionic liquids have been published in last year, [21][22][23][24] while this manuscript was being written, but this work was done independently. These recent reports have described the two-step one pot synthesis of triazolium salts using Cu catalyzed Huisgen 1,3-dipolar cycloaddition reaction, 23 described their thermal properties 18,22 and used them as a reaction media. 17,19,21 Ryu and coworkers have recognized that 1,2,3-triazolium salts have higher chemical stability in basic medium compared to imidazolium salts, due to the facile deprotonation of C-2 hydrogen of imidazolium salts.…”

“…Cathodic and anodic limits (E cathodic and E anodic vs. Ag/Ag + are set at a threshold of 1.0 mA cm22 ) and electrochemical window (EW) for the ionic salts at room temperature…”

Thermochemical Properties of Dissolution of Nitroguanidine in Dimethyl Sulfoxide and N,N-Dimethylformamide

“…The enthalpy of the process was detected by the RD496-2000 Calvet microcalorimeter. The entire process was repeated three times [9][10][11][12][13][14][15]. The thermochemical data obtained are listed in Table 1 and Table 2.…”

Click Reactions as a Key Step for an Efficient and Selective Synthesis of D-Xylose-Based ILs

“…Due to the increasing growth of their applications as alternative to volatile solvents in catalytic applications [1,4,5,6], biocatalysis [7,8], synthetic chemistry [9], electrochemistry [10,11,12,13,14], analytical applications [15,16,17,18,19], or for separations and extractions [20,21,22,23,24,25,26], the development of new IL structures is always being sought. Thanks to the click chemistry reaction, a large variety of 1,2,3-triazole structures can be obtained [27,28,29], but surprisingly, few ionic liquids derived from triazole have been reported (Figure 1) [30,31,32,33,34].…”