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1Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey. lturker@metu.edu.tr
Journal of Hazardous Materials
|May 8, 2009
Summary
This study links benzenoid nitro compound impact sensitivity to quantum chemical properties. Lower unoccupied molecular orbital energy strongly predicts sensitivity, suggesting tunneling during impact initiation.
Area of Science:
- Computational Chemistry
- Materials Science
Background:
- Benzenoid nitro compounds are crucial energetic materials.
- Understanding their impact sensitivity is vital for safety and design.
- Predictive models for sensitivity are needed.
Purpose of the Study:
- To correlate quantum chemical properties with impact sensitivity in benzenoid nitro compounds.
- To develop predictive equations for impact sensitivity.
Main Methods:
- Density Functional Theory (DFT) calculations using B3LYP/6-31G(d) were performed.
- Statistical analysis of calculated quantum chemical properties.
- Regression analysis to establish correlations.
Main Results:
- Identified strong dependence of impact sensitivity on lowest unoccupied molecular orbital (LUMO) energy.
- Found partial dependence on highest occupied molecular orbital (HOMO) energy.
- Developed two regression equations correlating properties with sensitivity.
Conclusions:
- Impact sensitivity is primarily governed by LUMO energy.
- HOMO energy plays a secondary role, indicating potential for ground-to-excited state tunneling during impact.
- Quantum chemical calculations offer a valuable tool for predicting energetic material sensitivity.
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