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Duarte JC, da Rocha RD, Borges I. Which molecular properties determine the impact sensitivity of an explosive? A machine learning quantitative investigation of nitroaromatic explosives. Phys Chem Chem Phys 2023; 25:6877-6890. [PMID: 36799468 DOI: 10.1039/d2cp05339j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
We decomposed density functional theory charge densities of 53 nitroaromatic molecules into atom-centered electric multipoles using the distributed multipole analysis that provides a detailed picture of the molecular electronic structure. Three electric multipoles, (the charge of the nitro groups), (the total dipole, i.e., polarization, of the nitro groups), (the total electron delocalization of the C ring atoms), and the number of explosophore groups (#NO2) were selected as features for a comprehensive machine learning (ML) investigation. The target property was the impact sensitivity h50 (cm) values quantified by drop-weight measurements, with a large h50 (e.g., 150 cm) indicating that an explosive is insensitive and vice versa. After a preliminary screening of 42 ML algorithms, four were selected based on the lowest root mean square errors: Extra Trees, Random Forests, Gradient Boosting, and AdaBoost. Compared to experimental data, the predicted h50 values of molecules having very different sensitivities for the four algorithms have differences in the range 19-28%. The most important properties for predicting h50 are the electron delocalization in the ring atoms and the polarization of the nitro groups with averaged weights of 39% and 35%, followed by the charge (16%) and number (10%) of nitro groups. A significant result is how the contribution of these properties to h50 depends on their actual sensitivities: for the most sensitive explosives (h50 up to ∼50 cm), the four properties contribute to reducing h50, and for intermediate ones (∼50 cm ≲ h50 ≲ 100 cm) #NO2 and contribute to increasing it and the other two properties to reducing it. For highly insensitive explosives (h50 ≳ 200 cm), all four properties essentially contribute to increasing it. These results furnish a consistent molecular basis of the sensitivities of known explosives that also can be used for developing safer new ones.
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Affiliation(s)
- Julio Cesar Duarte
- Departamento de Engenharia de Computação, Instituto Militar de Engenharia, Instituto Militar de Engenharia, Praça General Tibúrcio, 80, Urca, Rio de Janeiro (RJ), 22290-270, Brazil. .,Programa de Pós-Graduação em Engenharia de Defesa, Militar de Engenharia, Instituto Militar de Engenharia, Praça General Tibúrcio, 80, Urca, Rio de Janeiro (RJ), 22290-270, Brazil
| | - Romulo Dias da Rocha
- Programa de Pós-Graduação em Engenharia de Defesa, Militar de Engenharia, Instituto Militar de Engenharia, Praça General Tibúrcio, 80, Urca, Rio de Janeiro (RJ), 22290-270, Brazil
| | - Itamar Borges
- Departamento de Engenharia de Computação, Instituto Militar de Engenharia, Instituto Militar de Engenharia, Praça General Tibúrcio, 80, Urca, Rio de Janeiro (RJ), 22290-270, Brazil. .,Departamento de Química, Militar de Engenharia, Instituto Militar de Engenharia, Praça General Tibúrcio, 80, Urca, Rio de Janeiro (RJ), 22290-270, Brazil
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2
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Lansford JL, Barnes BC, Rice BM, Jensen KF. Building Chemical Property Models for Energetic Materials from Small Datasets Using a Transfer Learning Approach. J Chem Inf Model 2022; 62:5397-5410. [PMID: 36240441 DOI: 10.1021/acs.jcim.2c00841] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
For many experimentally measured chemical properties that cannot be directly computed from first-principles, the existing physics-based models do not extrapolate well to out-of-sample molecules, and experimental datasets themselves are too small for traditional machine learning (ML) approaches. To overcome these limitations, we apply a transfer learning approach, whereby we simultaneously train a multi-target regression model on a small number of molecules with experimentally measured values and a large number of molecules with related computed properties. We demonstrate this methodology on predicting the experimentally measured impact sensitivity of energetic crystals, finding that both characteristics of the computed dataset and model architecture are important to prediction accuracy of the small experimental dataset. Our directed-message passing neural network (D-MPNN) ML model using transfer learning outperforms direct-ML and physics-based models on a diverse test set, and the new methods described here are widely applicable to modeling many other structure-property relationships.
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Affiliation(s)
- Joshua L Lansford
- U.S. Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States.,Department of Chemical Engineering, MIT, Cambridge, Massachusetts 02139, United States
| | - Brian C Barnes
- U.S. Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Betsy M Rice
- U.S. Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Klavs F Jensen
- Department of Chemical Engineering, MIT, Cambridge, Massachusetts 02139, United States
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3
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Qin C, Dang M, Meng Y, Zhao D. Thermal risk classification optimization of flammable aromatic nitro compounds: Experiments and
QSPR
models. PROCESS SAFETY PROGRESS 2022. [DOI: 10.1002/prs.12412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chuanrui Qin
- College of Mechanical and Electrical Engineering China University of Petroleum (East China) Qingdao China
| | - Mengtao Dang
- College of Chemical Engineering China University of Petroleum (East China) Qingdao China
| | - Yifei Meng
- College of Chemical Engineering China University of Petroleum (East China) Qingdao China
- The Center For Chemical Process Safety‐China Section China University of Petroleum (East China) Qingdao China
- Research Center for Inherently Safety Technology of Petrochemical Engineering China University of Petroleum (East China) Qingdao China
| | - Dongfeng Zhao
- College of Chemical Engineering China University of Petroleum (East China) Qingdao China
- The Center For Chemical Process Safety‐China Section China University of Petroleum (East China) Qingdao China
- Research Center for Inherently Safety Technology of Petrochemical Engineering China University of Petroleum (East China) Qingdao China
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4
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Huang X, Li C, Tan K, Wen Y, Guo F, Li M, Huang Y, Sun CQ, Gozin M, Zhang L. Applying machine learning to balance performance and stability of high energy density materials. iScience 2021; 24:102240. [PMID: 33748721 PMCID: PMC7957118 DOI: 10.1016/j.isci.2021.102240] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/17/2021] [Accepted: 02/23/2021] [Indexed: 12/18/2022] Open
Abstract
The long-standing performance-stability contradiction issue of high energy density materials (HEDMs) is of extremely complex and multi-parameter nature. Herein, machine learning was employed to handle 28 feature descriptors and 5 properties of detonation and stability of 153 HEDMs, wherein all 21,648 data used were obtained through high-throughput crystal-level quantum mechanics calculations on supercomputers. Among five models, namely, extreme gradient boosting regression tree (XGBoost), adaptive boosting, random forest, multi-layer perceptron, and kernel ridge regression, were respectively trained and evaluated by stratified sampling and 5-fold cross-validation method. Among them, XGBoost model produced the best scoring metrics in predicting the detonation velocity, detonation pressure, heat of explosion, decomposition temperature, and lattice energy of HEDMs, and XGBoost predictions agreed best with the 1,383 experimental data collected from massive literatures. Feature importance analysis was conducted to obtain data-driven insight into the causality of the performance-stability contradiction and delivered the optimal range of key features for more efficient rational design of advanced HEDMs.
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Affiliation(s)
- Xiaona Huang
- Institute of Chemical Materials, China Academy of EngineeringPhysics (CAEP), Mianyang, 621900, China
- CAEP Software Center for High Performance Numerical Simulation, Beijing, 100088, China
- Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
| | - Chongyang Li
- CAEP Software Center for High Performance Numerical Simulation, Beijing, 100088, China
- Key Laboratory of Low-dimensional Materials and Application Technology (Ministry of Education), School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Kaiyuan Tan
- Institute of Chemical Materials, China Academy of EngineeringPhysics (CAEP), Mianyang, 621900, China
| | - Yushi Wen
- Institute of Chemical Materials, China Academy of EngineeringPhysics (CAEP), Mianyang, 621900, China
- Corresponding author
| | - Feng Guo
- School of Physical Science and Information Technology, Liaocheng University, Liaocheng, 252000, China
- Corresponding author
| | - Ming Li
- Institute of Chemical Materials, China Academy of EngineeringPhysics (CAEP), Mianyang, 621900, China
| | - Yongli Huang
- CAEP Software Center for High Performance Numerical Simulation, Beijing, 100088, China
| | - Chang Q. Sun
- EBEAM, Yangtze Normal University, Chongqing, 408100, China
- NOVITAS, Nanyang Technological University, Singapore, 639798, Singapore
| | - Michael Gozin
- School of Chemistry, Faculty of Exact Science, Tel Aviv University, Tel Aviv, 69978, Israel
- Tel Aviv University Center for Nanoscience and Nanotechnology, Tel Aviv, 69978, Israel
- Center of Advanced Combustion Science, Tel Aviv University, Tel Aviv, 69978, Israel
- Corresponding author
| | - Lei Zhang
- CAEP Software Center for High Performance Numerical Simulation, Beijing, 100088, China
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing, 100088, China
- Corresponding author
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5
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Li G, Zhang C. Review of the molecular and crystal correlations on sensitivities of energetic materials. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122910. [PMID: 32768822 DOI: 10.1016/j.jhazmat.2020.122910] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/05/2020] [Accepted: 05/05/2020] [Indexed: 06/11/2023]
Abstract
Highly efficient design on the levels of molecule and crystal, as well as formulation, is highly desired for accelerating the development of energetic materials (EMs). Sensitivity is one of the most important characteristics of EMs and should be compulsorily considered in the design. However, owing to multiple factors responsible for the sensitivity, it usually undergoes a low predictability. Thus, it becomes urgent to clarify which factors govern the sensitivity and what is the importance of these factors. The present article focuses upon the progress of the molecular and crystal correlations on the sensitivity, and the molecule-based numerical models for sensitivity prediction in the past decades. On the molecular level, composition, geometric structure, electronic structure, energy and reactivity can be correlated with the sensitivity; while the sensitivity can be also related with molecular packing pattern, intermolecular interaction, crystal morphology, crystal size and distribution, crystal surface/interface and crystal defect on the crystal level. And most of these factors, in particle on the crystal level, have been employed as variables in numerical models for predicting sensitivity of categorized EMs. Besides, we stress that more attention should be paid to the sensitivity correlations on the inherent structures of EMs, molecule and crystal packing, because they can be readily dealt by molecular simulations nowadays, facilitating to reveal the physical nature of sensitivity.
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Affiliation(s)
- Gang Li
- Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), P. O. Box 919-311, Mianyang, Sichuan 621999, China
| | - Chaoyang Zhang
- Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), P. O. Box 919-311, Mianyang, Sichuan 621999, China; Beijing Computational Science Research Center, Beijing 100048, China.
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6
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Du M, Han T, Liu F, Wu H. Theoretical investigation of the structure, detonation properties, and stability of bicyclo[3.2.1]octane derivatives. J Mol Model 2019; 25:253. [DOI: 10.1007/s00894-019-4116-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 07/02/2019] [Indexed: 11/24/2022]
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7
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Impact sensitivity of aryl diazonium chlorides: Limitations of molecular and solid-state approach. J Mol Graph Model 2019; 89:114-121. [PMID: 30884448 DOI: 10.1016/j.jmgm.2019.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 03/06/2019] [Accepted: 03/06/2019] [Indexed: 11/23/2022]
Abstract
The mechanism of the compression-induced decomposition of aryl diazonium chlorides is proposed on the basis of quantum-chemical calculations of both the isolated cations and crystalline materials. The electron transfer from the anion to the cation, followed by the crystal decomposition, is observed with the rise of pressure. Taking the known nature of the structural changes in cations undergone upon reduction, five structural, vibrational and electronic determinants of impact sensitivity are found. Thus, a correlation (R2 = 0.79) between the experimentally known impact sensitivity of 40 different aryl diazonium cations and the developed empirical function Ω, which includes the above-mentioned parameters, is obtained. Meanwhile, an abnormal impact sensitivity of 4-nitrobenzenediazonium chloride (4 J) compared to the parent benzenediazonium chloride (3 J) is rationalized on the basis of first-principles calculations of the latter and its three nitro derivatives. Using our recently proposed solid-state criteria of impact sensitivity, another empirical function Ω was developed being able to predict impact sensitivity of these four salts with very good confidence (R2 = 0.97).
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8
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Elton DC, Boukouvalas Z, Butrico MS, Fuge MD, Chung PW. Applying machine learning techniques to predict the properties of energetic materials. Sci Rep 2018; 8:9059. [PMID: 29899464 PMCID: PMC5998124 DOI: 10.1038/s41598-018-27344-x] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/01/2018] [Indexed: 11/23/2022] Open
Abstract
We present a proof of concept that machine learning techniques can be used to predict the properties of CNOHF energetic molecules from their molecular structures. We focus on a small but diverse dataset consisting of 109 molecular structures spread across ten compound classes. Up until now, candidate molecules for energetic materials have been screened using predictions from expensive quantum simulations and thermochemical codes. We present a comprehensive comparison of machine learning models and several molecular featurization methods - sum over bonds, custom descriptors, Coulomb matrices, Bag of Bonds, and fingerprints. The best featurization was sum over bonds (bond counting), and the best model was kernel ridge regression. Despite having a small data set, we obtain acceptable errors and Pearson correlations for the prediction of detonation pressure, detonation velocity, explosive energy, heat of formation, density, and other properties out of sample. By including another dataset with ≈300 additional molecules in our training we show how the error can be pushed lower, although the convergence with number of molecules is slow. Our work paves the way for future applications of machine learning in this domain, including automated lead generation and interpreting machine learning models to obtain novel chemical insights.
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Affiliation(s)
- Daniel C Elton
- Department of Mechanical Engineering, University of Maryland, College Park, 20742, United States.
| | - Zois Boukouvalas
- Department of Mechanical Engineering, University of Maryland, College Park, 20742, United States
| | - Mark S Butrico
- Department of Mechanical Engineering, University of Maryland, College Park, 20742, United States
| | - Mark D Fuge
- Department of Mechanical Engineering, University of Maryland, College Park, 20742, United States
| | - Peter W Chung
- Department of Mechanical Engineering, University of Maryland, College Park, 20742, United States.
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9
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Hamadache M, Benkortbi O, Hanini S, Amrane A. QSAR modeling in ecotoxicological risk assessment: application to the prediction of acute contact toxicity of pesticides on bees (Apis mellifera L.). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:896-907. [PMID: 29067614 DOI: 10.1007/s11356-017-0498-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
Despite their indisputable importance around the world, the pesticides can be dangerous for a range of species of ecological importance such as honeybees (Apis mellifera L.). Thus, a particular attention should be paid to their protection, not only for their ecological importance by contributing to the maintenance of wild plant diversity, but also for their economic value as honey producers and crop-pollinating agents. For all these reasons, the environmental protection requires the resort of risk assessment of pesticides. The goal of this work was therefore to develop a validated QSAR model to predict contact acute toxicity (LD50) of 111 pesticides to bees because the QSAR models devoted to this species are very scarce. The analysis of the statistical parameters of this model and those published in the literature shows that our model is more efficient. The QSAR model was assessed according to the OECD principles for the validation of QSAR models. The calculated values for the internal and external validation statistic parameters (Q 2 and [Formula: see text] are greater than 0.85. In addition to this validation, a mathematical equation derived from the ANN model was used to predict the LD50 of 20 other pesticides. A good correlation between predicted and experimental values was found (R 2 = 0.97 and RMSE = 0.14). As a result, this equation could be a means of predicting the toxicity of new pesticides.
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Affiliation(s)
- Mabrouk Hamadache
- Département du génie des procédés et environnement, Faculté de technologie, Université de Médéa, 26000, Médéa, Algeria.
| | - Othmane Benkortbi
- Département du génie des procédés et environnement, Faculté de technologie, Université de Médéa, 26000, Médéa, Algeria
| | - Salah Hanini
- Département du génie des procédés et environnement, Faculté de technologie, Université de Médéa, 26000, Médéa, Algeria
| | - Abdeltif Amrane
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Université de Rennes 1, 11 allée de Beaulieu, 35708, Rennes Cedex 7, CS 50837, France
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10
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Computational study of the structure and properties of bicyclo[3.1.1]heptane derivatives for new high-energy density compounds with low impact sensitivity. J Mol Model 2017; 24:17. [PMID: 29256012 DOI: 10.1007/s00894-017-3540-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 11/19/2017] [Indexed: 10/18/2022]
Abstract
To design new high-energy density compounds (HEDCs), a series of new bicyclo[2.2.1]heptane derivatives containing an aza nitrogen atom and nitro substituent were designed and studied theoretically. The density, heat of sublimation and impact sensitivity were estimated by electrostatic potential analysis of the molecular surface. Based on the designed isodesmic reaction, and the reliable heat of formation (HOF) of the reference compounds, HOFs were calculated and compared at B3LYP/6-311G(d,p) and B3P86/6-311G(d,p), respectively. The detonation performances, bond dissociation energies (BDE) and impact sensitivity were calculated to evaluate the designed compounds. The calculated results show that the number of aza nitrogen atoms and NO2 groups are two important factors for improving HOF, density and detonation properties. Thermal stability generally decreases with increasing nitro groups. And the N-NO2 bond is the trigger bond for all designed compounds except B8, whose trigger bond is C-NO2. Importantly, the BDE values are between 86.95 and 179.71 kJ mol-1 and meet the requirement for HEDCs. Detonation velocity and detonation pressure were found to be 5.77-9.65 km s-1 and 12.30-43.64 GPa, respectively. After comprehensive consideration of thermal stability, impact sensitivity and detonation properties, A7, A8, B8, C8, D7, E7, F7 and G6 may be considered as potential HEDCs. Especially, A8, B8, C8, and D7 have better detonation properties than the famous caged nitramine CL-20 (D = 9.40 km/s, P = 42.00GPa). Besides, all the designed potential HEDCs have reasonable impact sensitivity. Graphical abstract New high-energy density compounds (HEDCs) with low impact sensitivity (A8, B8, C8 and D7 have better detonation properties than CL-20).
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11
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Yosipof A, Shimanovich K, Senderowitz H. Materials Informatics: Statistical Modeling in Material Science. Mol Inform 2016; 35:568-579. [DOI: 10.1002/minf.201600047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 07/11/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Abraham Yosipof
- Department of Business Administration; Peres Academic Center; Rehovot 76102 Israel
- College of Law & Business; Ramat-Gan 26 Ben Gurion Street Israel
| | - Klimentiy Shimanovich
- Department of Chemistry; Bar Ilan University; Ramat-Gan 5290002 Israel
- Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering; Tel Aviv University; Ramat Aviv 69978 Israel
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12
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Mathieu D. Physics-Based Modeling of Chemical Hazards in a Regulatory Framework: Comparison with Quantitative Structure–Property Relationship (QSPR) Methods for Impact Sensitivities. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b01536] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Zeman S, Jungová M. Sensitivity and Performance of Energetic Materials. PROPELLANTS EXPLOSIVES PYROTECHNICS 2016. [DOI: 10.1002/prep.201500351] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Svatopluk Zeman
- Institute of Energetic Materials Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic
| | - Marcela Jungová
- Institute of Energetic Materials Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic
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14
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Hamadache M, Benkortbi O, Hanini S, Amrane A, Khaouane L, Si Moussa C. A Quantitative Structure Activity Relationship for acute oral toxicity of pesticides on rats: Validation, domain of application and prediction. JOURNAL OF HAZARDOUS MATERIALS 2016; 303:28-40. [PMID: 26513561 DOI: 10.1016/j.jhazmat.2015.09.021] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/07/2015] [Accepted: 09/09/2015] [Indexed: 06/05/2023]
Abstract
Quantitative Structure Activity Relationship (QSAR) models are expected to play an important role in the risk assessment of chemicals on humans and the environment. In this study, we developed a validated QSAR model to predict acute oral toxicity of 329 pesticides to rats because a few QSAR models have been devoted to predict the Lethal Dose 50 (LD50) of pesticides on rats. This QSAR model is based on 17 molecular descriptors, and is robust, externally predictive and characterized by a good applicability domain. The best results were obtained with a 17/9/1 Artificial Neural Network model trained with the Quasi Newton back propagation (BFGS) algorithm. The prediction accuracy for the external validation set was estimated by the Q(2)ext and the root mean square error (RMS) which are equal to 0.948 and 0.201, respectively. 98.6% of external validation set is correctly predicted and the present model proved to be superior to models previously published. Accordingly, the model developed in this study provides excellent predictions and can be used to predict the acute oral toxicity of pesticides, particularly for those that have not been tested as well as new pesticides.
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Affiliation(s)
- Mabrouk Hamadache
- Laboratoire des Biomatériaux et Phénomènes de Transport (LBMPT), Université de Médéa, Quartier Ain D'heb, 26000 Medea, Algeria.
| | - Othmane Benkortbi
- Laboratoire des Biomatériaux et Phénomènes de Transport (LBMPT), Université de Médéa, Quartier Ain D'heb, 26000 Medea, Algeria.
| | - Salah Hanini
- Laboratoire des Biomatériaux et Phénomènes de Transport (LBMPT), Université de Médéa, Quartier Ain D'heb, 26000 Medea, Algeria.
| | - Abdeltif Amrane
- Ecole Nationale Supérieure de Chimie de Rennes, Université de Rennes 1, CNRS, UMR 6226, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France.
| | - Latifa Khaouane
- Laboratoire des Biomatériaux et Phénomènes de Transport (LBMPT), Université de Médéa, Quartier Ain D'heb, 26000 Medea, Algeria.
| | - Cherif Si Moussa
- Laboratoire des Biomatériaux et Phénomènes de Transport (LBMPT), Université de Médéa, Quartier Ain D'heb, 26000 Medea, Algeria.
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15
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Keshavarz MH, Keshavarz Z. Relation between Electric Spark Sensitivity and Impact Sensitivity of Nitroaromatic Energetic Compounds. Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201600015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Gupta S, Basant N, Singh KP. Three-Tier Strategy for Screening High-Energy Molecules Using Structure–Property Relationship Modeling Approaches. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b03575] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Shikha Gupta
- Environmental
Chemistry Division, CSIR-Indian Institute of Toxicology Research, Post Box 80, Mahatma Gandhi Marg, Lucknow 226 001, India
| | | | - Kunwar P. Singh
- Environmental
Chemistry Division, CSIR-Indian Institute of Toxicology Research, Post Box 80, Mahatma Gandhi Marg, Lucknow 226 001, India
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Mathieu D, Alaime T. Impact sensitivities of energetic materials: Exploring the limitations of a model based only on structural formulas. J Mol Graph Model 2015; 62:81-86. [DOI: 10.1016/j.jmgm.2015.09.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 08/28/2015] [Accepted: 09/01/2015] [Indexed: 11/16/2022]
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18
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Mathieu D, Alaime T. Predicting impact sensitivities of nitro compounds on the basis of a semi-empirical rate constant. J Phys Chem A 2014; 118:9720-6. [PMID: 25254318 DOI: 10.1021/jp507057r] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A physically motivated model is put forward to estimate impact sensitivity of nitro compounds on the basis of the relationship h(50) ∝ k(pr)(-4) between drop weight impact test data h(50) and rate constant k(pr) for the propagation of the decomposition. An approximate expression involving two adjustable parameters is introduced to estimate k(pr) from molecular structure. As a result, using only a hand-held calculator, ln(h(50)) values are estimated with a good reliability (R(2) ≃ 0.8) compared to previous schemes. These results support the underlying assumption that sensitivity primarily depends on the ability of reacting species to propagate the decomposition before the released energy dissipates away.
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19
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Fayet G, Rotureau P. Development of simple QSPR models for the impact sensitivity of nitramines. J Loss Prev Process Ind 2014. [DOI: 10.1016/j.jlp.2014.04.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mathieu D. Toward a physically based quantitative modeling of impact sensitivities. J Phys Chem A 2013; 117:2253-9. [PMID: 23410105 DOI: 10.1021/jp311677s] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Among the subsequent steps leading from impact to explosive decomposition in nitro compounds, the ability of early exothermic reactions to trigger the decomposition of neighboring molecules before the released energy has dissipated away is assumed to be critical. The rate of this process is roughly estimated using as inputs the energy content and the dissociation energy of the weakest X-NO2 bonds. While the sensitivity index thus obtained was previously shown to exhibit striking correlations with gap test pressures, its correlation with drop weight impact test data is poorer. Nevertheless, considering four different subsets of molecules depending on the environment of the most labile nitro groups, straightforward regressions against this sensitivity index yield a practical method to estimate impact sensitivity, whose combination of fair performance and generality is provided by no alternative approach, except purely empirical models based on extensive parametrization.
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Prana V, Fayet G, Rotureau P, Adamo C. Development of validated QSPR models for impact sensitivity of nitroaliphatic compounds. JOURNAL OF HAZARDOUS MATERIALS 2012; 235-236:169-177. [PMID: 22871414 DOI: 10.1016/j.jhazmat.2012.07.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 06/11/2012] [Accepted: 07/16/2012] [Indexed: 06/01/2023]
Abstract
The European regulation of chemicals named REACH implies the assessment of a large number of substances based on their hazardous properties. However, the complete characterization of physico-chemical, toxicological and eco-toxicological properties by experimental means is incompatible with the imposed calendar of REACH. Hence, there is a real need in evaluating the capabilities of alternative methods such as quantitative structure-property relationship (QSPR) models, notably for physico-chemical properties. In the present work, the molecular structures of 50 itroaliphatic compounds were correlated with their impact sensitivities (h(50%)) using such predictive models. More than 400 olecular descriptors (constitutional, topological, geometrical, quantum chemical) were calculated and linear and multi-linear regressions were performed to find accurate quantitative relationships with experimental impact sensitivities. Considering different sets of descriptors, four predictive models were obtained and two of them were selected for their predictive reliability. To our knowledge, these QSPR models for the impact sensitivity of nitroaliphatic compounds are the first ones being rigorously validated (both internally and externally) with defined applicability domains. They hence follow all OECD principles for regulatory acceptability of QSPRs, allowing possible application in REACH.
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Affiliation(s)
- Vinca Prana
- Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie, CNRS UMR-7575, Chimie ParisTech, 11 rue P. et M. Curie, 75231 Paris Cedex 05, France
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