scholarly journals Computational Design of High Energy RDX-Based Derivatives: Property Prediction, Intermolecular Interactions, and Decomposition Mechanisms

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7199
Author(s):  
Li Tang ◽  
Weihua Zhu
Keyword(s):  
Intermolecular Interactions ◽  
Computational Design ◽  
High Energy ◽  
High Energy Density ◽  
Ab Initio Molecular Dynamics ◽  
Detonation Properties ◽  
Cage Compounds ◽  
High Energy Density Compounds ◽  
Dynamics Simulations ◽  
Low Sensitivity

A series of new high-energy insensitive compounds were designed based on 1,3,5-trinitro-1,3,5-triazinane (RDX) skeleton through incorporating -N(NO2)-CH2-N(NO2)-, -N(NH2)-, -N(NO2)-, and -O- linkages. Then, their electronic structures, heats of formation, detonation properties, and impact sensitivities were analyzed and predicted using DFT. The types of intermolecular interactions between their bimolecular assemble were analyzed. The thermal decomposition of one compound with excellent performance was studied through ab initio molecular dynamics simulations. All the designed compounds exhibit excellent detonation properties superior to 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20), and lower impact sensitivity than CL-20. Thus, they may be viewed as promising candidates for high energy density compounds. Overall, our design strategy that the construction of bicyclic or cage compounds based on the RDX framework through incorporating the intermolecular linkages is very beneficial for developing novel energetic compounds with excellent detonation performance and low sensitivity.

Molecular design on a new family of azaoxaadamantane cage compounds as potential high-energy density compounds

2019 ◽  
Vol 97 (2) ◽  
pp. 86-93 ◽  
Author(s):  
Yong Pan ◽  
Weihua Zhu ◽  
Heming Xiao
Keyword(s):  
Thermal Stability ◽  
Density Functional ◽  
Parent Compound ◽  
High Energy ◽  
High Energy Density ◽  
Lower Sensitivity ◽  
Detonation Properties ◽  
Detonation Pressure ◽  
Cage Compounds ◽  
New Family

A new family of azaoxaadamantane cage compounds were firstly designed by introducing the oxygen atom into hexanitrohexaazaoxaadmantane (HNHAA) to replace the N–NO2 group. Their properties including heats of formation (HOFs), detonation properties, strain energies, thermal stability, and sensitivity were extensively studied by using density functional theory. All of the title compounds exhibit surprisingly high density (ρ > 2.01 g/cm3) and excellent detonation properties (detonation velocity (D) > 9.29 km/s and detonation pressure (P) > 40.80 GPa). In particular, B (4,8,9,10-tetraazadioxaadamantane) and C (6,8,9,10-tetraazadioxaadamantane) have a remarkably high D and P values (9.70 km/s and 44.45 GPa, respectively), which are higher than that of HNHAA or CL-20. All of the title compound have higher thermal stability and lower sensitivity (h50 > 19.58 cm) compared with the parent compound HNHAA. Three triazatrioxaadamantane cage compounds, D (6,8,9-triazatrioxaadamantane), E (6,8,10-triazatrioxaadamantane), and F (8,9,10-triazatrioxaadamantane), are expected to be relatively insensitive explosives. All of the title compounds exhibit a combination of high denotation properties, good thermal stability, and low insensitivity.

Computational study of energetic derivatives of 3,3′-bridged ditriazoles

2020 ◽  
Vol 98 (3) ◽  
pp. 115-127 ◽  
Author(s):  
Raza Ullah Khan ◽  
Weihua Zhu
Keyword(s):  
Density Functional ◽  
Computational Study ◽  
Triazole Ring ◽  
High Energy ◽  
High Energy Density ◽  
Heats Of Formation ◽  
Detonation Properties ◽  
Geometrical Structures ◽  
Thermal Stabilities ◽  
High Energy Density Compounds

A series of energetic bridged ditriazole was designed by incorporating different bridges and substituents into 4H-1,2,4-triazole ring. The geometrical structures, heats of formation, detonation properties, electronic structures, thermodynamic properties, free spaces, impact sensitivities, and thermal stabilities of the designed compounds were evaluated by employing density functional theory. The results elucidate that the –N3 substituent and –N=N– bridge can sufficiently increase their heats of formation. The calculated values of detonation properties show that –NF2, –ONO2, –O–, and –N=N(O)– are useful structural fragments to improve their detonation performance. The incorporation of the oxy (–O–) bridge increases their HOMO–LUMO energy gaps. An analysis of h50 values indicate that most of the designed compounds are less sensitive. The N(ring)-NO2 bond in the majority of the derivatives may be a possible trigger bond in thermal decomposition process. The incorporation of –CH2–CH2– and –O– is helpful to enhance their thermal stabilities. Based on appropriate thermal stabilities and superb detonation properties, six compounds were screened as promising high energy density compounds.

A THEORETICAL STUDY ON THE INFRARED SPECTRA, THERMODYNAMIC FUNCTIONS, AND DETONATION PARAMETERS FOR THE –CN, –NC, –NNO2 and –ONO2 DERIVATIVES OF HNS

2013 ◽  
Vol 12 (01) ◽  
pp. 1250095
Author(s):  
GUI-XIANG WANG ◽  
XUE-DONG GONG ◽  
YAN LIU ◽  
HE-MING XIAO
Keyword(s):  
Thermodynamic Functions ◽  
Density Functional ◽  
Theoretical Study ◽  
Vibrational Analysis ◽  
High Energy ◽  
High Energy Density ◽  
Detonation Properties ◽  
Functional Theory ◽  
High Energy Density Compounds ◽  
Derivatives Of

The cyano (–CN), isocyano (–NC), nitramine (–NNO2), and nitrate (–ONO2) derivatives of HNS has been studied in this work at the B3LYP/6-31G* level of density functional theory. Their IR spectra were predicted and assigned by vibrational analysis. Based on the frequencies scaled by 0.96 and the principle of statistic thermodynamics, the thermodynamic functions were evaluated. It is found that the thermodynamic functions linearly increase with the number of – CN , – NC , – NNO2 , and – ONO2 groups, as well as the temperature. The contribution of various substitutents to the thermodynamic functions has the order of – ONO2 > –NNO2 > –NC > –CN . Detonation properties were evaluated using the modified Kamlet–Jacobs equations based on the calculated densities and heats of formation. Compared with the commonly used explosives (RDX and HMX), 3,3′,5-trinitramine-2,2′,4,4′,6,6′-Hexanitrostilbene, 3,3′,5,5′-tetranitramine-2,2′, 4,4′,6,6′-Hexanitrostilbene, 3,3′,5-trinitrate-2,2′,4,4′,6,6′-Hexanitrostilbene, and 3,3′,5,5′-tetranitrate-2,2′, 4,4′,6,6′-Hexanitrostilbene have better detonation performance and may be potential candidates of high energy density compounds.

scholarly journals Designing and looking for novel cage compounds based on bicyclo-HMX as high energy density compounds

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 44-52 ◽  
Author(s):  
Yong Pan ◽  
Weihua Zhu
Keyword(s):  
Thermal Stability ◽  
Energy Density ◽  
Electronic Structures ◽  
High Energy ◽  
Impact Sensitivity ◽  
High Energy Density ◽  
Cage Compounds ◽  
Energetic Properties ◽  
High Energy Density Compounds

We designed four cage compounds by introducing intramolecular linkages into the bicyclo-HMX framework. Their molecular and electronic structures, energetic properties, thermal stability, and impact sensitivity were evaluated using DFT.

High-pressure new phase of AgN3

2021 ◽  
pp. 2150386
Author(s):  
Shifeng Niu ◽  
Ran Liu ◽  
Xuhan Shi ◽  
Zhen Yao ◽  
Bingbing Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Density ◽  
Density Functional ◽  
High Energy ◽  
High Energy Density ◽  
Detonation Properties ◽  
Ambient Conditions ◽  
Structure Search ◽  
Enthalpy Difference ◽  
High Energy Density Material

The structural evolutionary behaviors of AgN3 have been studied by using the particle swarm optimization structure search method combined with the density functional theory. One stable high-pressure metal polymeric phase with the [Formula: see text] space group is suggested. The enthalpy difference analysis indicates that the Ibam-AgN3 phase will transfer to the I4/mcm-AgN3 phase at 4.7 GPa and then to the [Formula: see text]-AgN3 phase at 24 GPa. The [Formula: see text]-AgN3 structure is composed of armchair–antiarmchair N-chain, in which all the N atoms are sp2 hybridization. The inherent stability of the armchair–antiarmchair chain and the anion–cation interaction between the N-chain and Ag atom induce a high stability of the [Formula: see text]-AgN3 phase, which can be captured at ambient conditions and hold its stable structure up to 1400 K. The exhibited high energy density (1.88 KJ/g) and prominent detonation properties ([Formula: see text] Km/s; [Formula: see text] GPa) of the [Formula: see text]-AgN3 phase make it a potentially high energy density material.

Looking for high energy density compounds among polynitraminecubanes

2012 ◽  
Vol 19 (2) ◽  
pp. 571-580 ◽  
Author(s):  
Wei-Jie Chi ◽  
Lu-Lin Li ◽  
Bu-Tong Li ◽  
Hai-Shun Wu
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
High Energy Density Compounds
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