Characterization and properties of a new energetic co-crystal composed of trinitrotoluene and 2,6-diaminotoluene


Sen N.

Journal of Molecular Structure, vol.1179, pp.453-461, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1179
  • Publication Date: 2019
  • Doi Number: 10.1016/j.molstruc.2018.11.013
  • Journal Name: Journal of Molecular Structure
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.453-461
  • Police Academy Affiliated: Yes

Abstract

© 2018 Elsevier B.V.A 1:1 co-crystal of TNT and 2,6-diaminotoluene were prepared by solvent evaporation method. The structure of the co-crystal was determined via single crystal and powder X-ray diffraction techniques. The diffraction data analysis revealed that the co-crystal is mainly formed by hydrogen bonding (amino-nitro) and donor-acceptor Π-Π stacking. Besides, Hirshfeld surfaces and associated fingerprint plots of the co-crystal were examined and the results showed that the structures are stabilized by H⋯H, O⋯H, O⋯O and C⋯C (Π-Π) intermolecular interactions. The TNT: 2,6-diaminotoluene co-crystal shows significantly reduced impact sensitivity relative to pure TNT. The difference between the impact sensitivity of co-crystal and the impact sensitivity of TNT is due to having different intermolecular interactions observed in the co-crystal structure. This comprehensive study about the formation of co-crystal has resulted in alteration of vital properties including density, oxygen balance, melting point, decomposition temperature, crystal packing and detonation performance (sensitivity, velocity, pressure). The obtained results highlight that co-crystallization provides the newly discovered energetic material with attractive properties, and is an effective way to modify existing energetic material. As a consequence, the advanced and safer energetic material can be created without chemical synthesis.