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Title: Extemporaneous Mechanochemistry: Shock-Wave-Induced Ultrafast Chemical Reactions Due to Intramolecular Strain Energy

Journal Article · · Journal of Physical Chemistry Letters

We report regions of energy localization referred to as hotspots are known to govern shock initiation and the run-to-detonation in energetic materials. Mounting computational evidence points to accelerated chemistry in hotspots from large intramolecular strains induced via the interactions between the shock wave and microstructure. However, definite evidence mapping intramolecular strain to accelerated or altered chemical reactions has so far been elusive. From a large-scale reactive molecular dynamics simulation of the energetic material 1,3,5-triamino-2,4,6-trinitrobenzene, we map decomposition kinetics to molecular temperature and intramolecular strain energy prior to reaction. Both temperature and intramolecular strain are shown to accelerate chemical kinetics. A detailed analysis of the atomistic trajectory shows that intramolecular strain can induce a mechanochemical alteration of decomposition mechanisms. The results in this paper could inform continuum-level chemistry models to account for a wide range of mechanochemical effects.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
Office of Naval Research (ONR); US Army Research Laboratory (USARL); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1886150
Report Number(s):
LLNL-JRNL-834510; 1052459
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 29 Vol. 13; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (58)

Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
On the shock induced failure of brittle solids journal October 1998
A generalized crystal-cutting method for modeling arbitrarily oriented crystals in 3D periodic simulation cells with applications to crystal–crystal interfaces journal October 2016
Advances in Quantum Mechanochemistry: Electronic Structure Methods and Force Analysis journal October 2016
Unsupervised Learning-Based Multiscale Model of Thermochemistry in 1,3,5-Trinitro-1,3,5-triazinane (RDX) journal October 2020
Predicted Reaction Mechanisms, Product Speciation, Kinetics, and Detonation Properties of the Insensitive Explosive 2,6-Diamino-3,5-dinitropyrazine-1-oxide (LLM-105) journal February 2021
Anisotropic Hydrolysis Susceptibility in Deformed Polydimethylsiloxanes journal August 2019
Fourier-like Thermal Relaxation of Nanoscale Explosive Hot Spots journal September 2021
The Potential Energy Hotspot: Effects of Impact Velocity, Defect Geometry, and Crystallographic Orientation journal February 2022
Ultrafast Chemistry under Nonequilibrium Conditions and the Shock to Deflagration Transition at the Nanoscale journal September 2015
Irreversible Deformation Mechanisms for 1,3,5-Triamino-2,4,6-Trinitrobenzene Single Crystal through Molecular Dynamics Simulations journal May 2018
Role of Molecular Disorder on the Reactivity of RDX journal November 2018
Sensitivity of the Shock Initiation Threshold of 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB) to Nuclear Quantum Effects journal August 2019
A Hotspot’s Better Half: Non-Equilibrium Intra-Molecular Strain in Shock Physics journal March 2021
Covalent Mechanochemistry: Theoretical Concepts and Computational Tools with Applications to Molecular Nanomechanics journal June 2012
Charge equilibration for molecular dynamics simulations journal April 1991
First Principles Dynamics and Minimum Energy Pathways for Mechanochemical Ring Opening of Cyclobutene journal May 2009
Shock Wave Energy Absorption in Metal–Organic Framework journal January 2019
Ring Closure Mediated by Intramolecular Hydrogen Transfer in the Decomposition of a Push−Pull Nitroaromatic:  TATB journal July 2000
ReaxFF:  A Reactive Force Field for Hydrocarbons journal October 2001
Modified Chemistry of Siloxanes under Tensile Stress:  Interaction with Environment journal July 2006
Prebiotic Chemistry within a Simple Impacting Icy Mixture journal May 2013
Compressive Shear Reactive Molecular Dynamics Studies Indicating That Cocrystals of TNT/CL-20 Decrease Sensitivity journal December 2014
Probing the limits of metal plasticity with molecular dynamics simulations journal September 2017
Inducing and quantifying forbidden reactivity with single-molecule polymer mechanochemistry journal February 2015
Synthesis of glycine-containing complexes in impacts of comets on early Earth journal September 2010
Nanosecond formation of diamond and lonsdaleite by shock compression of graphite journal March 2016
A transient semimetallic layer in detonating nitromethane journal December 2007
The ReaxFF reactive force-field: development, applications and future directions journal March 2016
Ultrafast shock synthesis of nanocarbon from a liquid precursor journal January 2020
Mechanochemistry for ammonia synthesis under mild conditions journal December 2020
Rate enhancement of the Morita–Baylis–Hillman reaction through mechanochemistry journal January 2007
Synthesis of functionalized nitrogen-containing polycyclic aromatic hydrocarbons and other prebiotic compounds in impacting glycine solutions journal January 2019
Mechanochemical synthesis of glycine oligomers in a virtual rotational diamond anvil cell journal January 2020
Shear-induced metallization of triamino-trinitrobenzene crystals journal August 2003
The mechanical strength of a covalent bond calculated by density functional theory journal May 2000
Mechanochemistry for shock wave energy dissipation
  • Shaw, William L.; Ren, Yi; Moore, Jeffrey S.
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2015: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.4971484
conference January 2017
Hotspot formation due to shock-induced pore collapse in 1,3,5,7-tetranitro-1,3,5,7-tetrazoctane (HMX): Role of pore shape and shock strength in collapse mechanism and temperature journal May 2020
Virtual melting as a new mechanism of stress relaxation under high strain rate loading journal July 2012
Shear-induced metallization journal February 1993
Mechanochemistry: The Last Energetic Frontier journal October 2006
Anisotropic strength behavior of single-crystal TATB journal December 2021
Detonation-induced transformation of graphite to hexagonal diamond journal September 2020
Atomistic simulations of shock-induced transformations and their orientation dependence in bcc Fe single crystals journal August 2005
Shock-induced plasticity in tantalum single crystals: Interatomic potentials and large-scale molecular-dynamics simulations journal October 2013
Extended asymmetric hot region formation due to shockwave interactions following void collapse in shocked high explosive journal August 2016
Multiscale modeling of shock wave localization in porous energetic material journal January 2018
Mechanochemical formation of heterogeneous diamond structures during rapid uniaxial compression in graphite journal May 2018
High Explosive Ignition through Chemically Activated Nanoscale Shear Bands journal May 2020
Molecular Dynamics of Shock Waves in Three-Dimensional Solids: Transition from Nonsteady to Steady Waves in Perfect Crystals and Implications for the Rankine-Hugoniot Conditions journal November 1979
Shock Waves in High-Energy Materials: The Initial Chemical Events in Nitramine RDX journal August 2003
Energy Exchange between Mesoparticles and Their Internal Degrees of Freedom journal January 2005
The crystal structure of 1,3,5-triamino-2,4,6-trinitrobenzene journal May 1965
Microscopic View of Structural Phase Transitions Induced by Shock Waves journal May 2002
Brownian Dynamics Simulations Without Gaussian Random Numbers journal September 1991
Chemistry Under Shock Conditions journal July 2021
Many-Body Mechanochemistry: Intra-molecular Strain in Condensed Matter Chemistry journal February 2022
Deviatoric Stress Driven Transient Melting Below the Glass Transition Temperature in Shocked Polymers text January 2022