Electrostatic field modulation of high-nitrogen heterocycles: a computational study on energy and stability.

CONTEXT: In this study, the effect of external electric field (EEF) on three kinds of high nitrogen heterocyclic compounds with different ring structures (PA-1 ~ 3, oxadiazole, triazole, and tetrazole) was investigated by quantum chemical calculation. By using B3LYP/6-311G + (d, p) theory and Laplace bond order (LBO) analysis, the trigger bond was determined, and further EEF was applied along the X/Y/Z axis (0-0.02 a.u.) to study its effects on molecular structure, electron distribution, and DOS. The results show that EEF in different directions has a significant effect on charge transfer and intermolecular interaction, which provides a theoretical basis for regulating energy output and thermal stability. This work highlights the potential of computational strategies in the design of energetic materials with controllable properties, and builds a bridge between theoretical prediction and practical application in high-energy systems.

METHODS: The Gaussian 16 software has been chosen for simulation and computation in this study. The B3LYP functional and 6-311G + (d, p) basis set has been utilized for the calculation and simulation of external electric fields, with the strength ranging from 0 to 0.020 a.u. and an increment gradient of 0.005 a.u.