Computational Investigation and Screening of High-Energy-Density
Materials: Based on Nitrogen-Rich 1,2,4,5-tetrazine Energetic
Derivatives
Abstract
Abstract: In the present work, the geometric structures, the frontier
molecular orbitals and the enthalpy of formation (HOF) of thirty six 1,
2, 4, 5-tetrazine derivatives (FTT) were systematically studied by using
the B3LYP/6-311+G* method of density functional theory. Meanwhile, we
also predicted the stability, detonation properties and thermodynamic
properties of all FTT compounds. Results showed that all compounds have
superior enthalpy of formation far exceeding that of common explosives
RDX and HMX, ranging from 859kJ·mol-1-1532kJ·mol-1. In addition, the
detonation performance (Q = 1426cal·g-1 -1804cal·g-1; P = 29.54GPa -
41.84GPa; D = 8.02km·s-1 - 9.53km·s-1), which is superior to TATB and
TNT. It is also concluded that the introduction of coordination oxygen
on the tetrazine ring can improve the HOF, density and detonation
performance of the title compound, and -NH-NH- bridge and -NHNO2 group
are also the perfect combination to increase these values. In view of
stability, because of the fascinating performance of D3 (ρ =1.89g·cm-3;
D = 9.38km·s-1; P = 40.13GPa),E3(ρ = 1.87g·cm-3; D = 9.19km·s-1; P =
38.35GPa), F1 (ρ = 1.87g·cm-3; D = 9.42km·s-1; P = 40.23GPa) and F3 (ρ=
1.92g·cm-3; D = 9.53km·s-1; P = 41.84GPa), makes them very attractive to
be chosen as HEDMs.