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Benjamin I, Louis H, Ogungbemiro FO, Agurokpon DC, Ekpong BO, Gber TE, Pembere AMS. Single-atoms (N, P, S) encapsulation of Ni-doped graphene/PEDOT hybrid materials as sensors for H 2S gas applications: intuition from computational study. Sci Rep 2023; 13:18856. [PMID: 37914823 PMCID: PMC10620405 DOI: 10.1038/s41598-023-46153-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 10/28/2023] [Indexed: 11/03/2023] Open
Abstract
This comprehensive study was dedicated to augmenting the sensing capabilities of Ni@GP_PEDOT@H2S through the strategic functionalization with nitrogen, phosphorus, and sulfur heteroatoms. Governed by density functional theory (DFT) computations at the gd3bj-B3LYP/def2svp level of theory, the investigation meticulously assessed the performance efficacy of electronically tailored nanocomposites in detecting H2S gas-a corrosive byproduct generated by sulfate reducing bacteria (SRB), bearing latent threats to infrastructure integrity especially in the oil and gas industry. Impressively, the analysed systems, comprising Ni@GP_PEDOT@H2S, N_Ni@GP_PEDOT@H2S, P_Ni@GP_PEDOT@H2S, and S_Ni@GP_PEDOT@H2S, unveiled both structural and electronic properties of noteworthy distinction, thereby substantiating their heightened reactivity. Results of adsorption studies revealed distinct adsorption energies (- 13.0887, - 10.1771, - 16.8166, and - 14.0955 eV) associated respectively with N_Ni@GP_PEDOT@H2S, P_Ni@GP_PEDOT@H2S, S_Ni@GP_PEDOT@H2S, and Ni@GP_PEDOT systems. These disparities vividly underscored the diverse strengths of the adsorbed H2S on the surfaces, significantly accentuating the robustness of S_Ni@GP_PEDOT@H2S as a premier adsorbent, fuelled by the notably strong sulfur-surface interactions. Fascinatingly, the sensor descriptor findings unveiled multifaceted facets pivotal for H2S detection. Ultimately, molecular dynamic simulations corroborated the cumulative findings, collectively underscoring the pivotal significance of this study in propelling the domain of H2S gas detection and sensor device innovation.
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Affiliation(s)
- Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria.
| | - Festus O Ogungbemiro
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemistry, Federal University of Lafia, Lafia, Nassarawa State, Nigeria
| | - Daniel C Agurokpon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Bassey O Ekpong
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, University of Calabar, Calabar, Nigeria
| | - Terkumbur E Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - Anthony M S Pembere
- Department of Chemistry, Jaramogi Odinga University of Science and Technology, Bondo, Kenya
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Lee S, Park H, Choi C, Kim W, Kim KK, Han YK, Kang J, Kang CJ, Son Y. Multi-order graph attention network for water solubility prediction and interpretation. Sci Rep 2023; 13:957. [PMID: 36864064 PMCID: PMC9981901 DOI: 10.1038/s41598-022-25701-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/02/2022] [Indexed: 03/04/2023] Open
Abstract
The water solubility of molecules is one of the most important properties in various chemical and medical research fields. Recently, machine learning-based methods for predicting molecular properties, including water solubility, have been extensively studied due to the advantage of effectively reducing computational costs. Although machine learning-based methods have made significant advances in predictive performance, the existing methods were still lacking in interpreting the predicted results. Therefore, we propose a novel multi-order graph attention network (MoGAT) for water solubility prediction to improve the predictive performance and interpret the predicted results. We extracted graph embeddings in every node embedding layer to consider the information of diverse neighboring orders and merged them by attention mechanism to generate a final graph embedding. MoGAT can provide the atomic-specific importance scores of a molecule that indicate which atoms significantly influence the prediction so that it can interpret the predicted results chemically. It also improves prediction performance because the graph representations of all neighboring orders, which contain diverse range of information, are employed for the final prediction. Through extensive experiments, we demonstrated that MoGAT showed better performance than the state-of-the-art methods, and the predicted results were consistent with well-known chemical knowledge.
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Affiliation(s)
- Sangho Lee
- grid.255168.d0000 0001 0671 5021Department of Industrial and Systems Engineering, Dongguk University-Seoul, Seoul, 04620 South Korea ,grid.255168.d0000 0001 0671 5021Data Science Laboratory (DSLAB), Dongguk University-Seoul, Seoul, 04620 South Korea
| | - Hyunwoo Park
- grid.255168.d0000 0001 0671 5021Department of Industrial and Systems Engineering, Dongguk University-Seoul, Seoul, 04620 South Korea ,grid.255168.d0000 0001 0671 5021Data Science Laboratory (DSLAB), Dongguk University-Seoul, Seoul, 04620 South Korea
| | - Chihyeon Choi
- grid.255168.d0000 0001 0671 5021Department of Industrial and Systems Engineering, Dongguk University-Seoul, Seoul, 04620 South Korea ,grid.255168.d0000 0001 0671 5021Data Science Laboratory (DSLAB), Dongguk University-Seoul, Seoul, 04620 South Korea
| | - Wonjoon Kim
- grid.412059.b0000 0004 0532 5816Division of Future Convergence (HCI Science Major), Dongduk Women’s University, Seoul, 02748 South Korea
| | - Ki Kang Kim
- grid.264381.a0000 0001 2181 989XDepartment of Energy Science, Sungkyunkwan University (SKKU), Suwon, 16419 South Korea ,grid.264381.a0000 0001 2181 989XCenter for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University (SKKU), Suwon, 16419 South Korea
| | - Young-Kyu Han
- grid.255168.d0000 0001 0671 5021Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620 South Korea
| | - Joohoon Kang
- grid.264381.a0000 0001 2181 989XSchool of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419 South Korea ,grid.264381.a0000 0001 2181 989XKIST-SKKU Carbon-Neutral Research Center, Sungkyunkwan University (SKKU), Suwon, 16419 South Korea
| | - Chang-Jong Kang
- Department of Physics, Chungnam National University, Daejeon, 34134, South Korea.
| | - Youngdoo Son
- Department of Industrial and Systems Engineering, Dongguk University-Seoul, Seoul, 04620, South Korea. .,Data Science Laboratory (DSLAB), Dongguk University-Seoul, Seoul, 04620, South Korea.
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3
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Xu R, Gu S, Chen K, Chen J, Wang Y, Gao Y, Shang S, Song Z, Song J, Li J. Discovery of rosin-based acylhydrazone derivatives as potential antifungal agents against rice Rhizoctonia solani for sustainable crop protection. PEST MANAGEMENT SCIENCE 2023; 79:655-665. [PMID: 36223125 DOI: 10.1002/ps.7232] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 09/28/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND The use of fungicides to protect crops from diseases is an effective method, and novel environmentally friendly plant-derived fungicides with enhanced performance and low toxicity are urgent requirements for sustainable agriculture. RESULTS Two kinds of rosin-based acylhydrazone compounds were designed and prepared. Based on the antifungal activity assessment against Rhizoctonia solani, Fusarium oxysporum, Phytophthora capsici, Sclerotinia sclerotiorum, and Botrytis cinerea, acylhydrazone derivatives containing a thiophene ring were screened and showed an inhibitory effect on rice R. solani. Among them, Compound 4n, with an electron-withdrawing group on the benzene ring structure attached to the thiophene ring, showed optimal activity, and the EC50 value was 0.981 mg L-1 , which was lower than that of carbendazim. Furthermore, it was indicated that 4n could affect the mycelial morphology, cell membrane permeability and microstructure, cause the generation of reactive oxygen species in fungal cells, and damage the nucleus and mitochondrial physiological function, resulting in the cell death of R. solani. Meanwhile, Compound 4n exhibited a better therapeutic effect on in vivo rice plants. However, the induction activity of 4n on the defense enzyme in rice leaf sheaths showed that 4n stimulates the initial resistance of rice plants by removing active oxygen, thereby protecting the cell membrane or enhancing the strength of the cell wall. Through the quantitative structure-activity relationship study, the quantitative chemical and electrostatic descriptors significantly affect the binding of 4n with the receptor, which improves its antifungal activity. CONCLUSION This study provides a basis for exploiting potential rosin-based fungicides in promoting sustainable crop protection. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Renle Xu
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling, Shaanxi, China
| | - Shihao Gu
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling, Shaanxi, China
| | - Kun Chen
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling, Shaanxi, China
| | - Jinyu Chen
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling, Shaanxi, China
| | - Yong Wang
- Department of Agricultural Pharmacology, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - Yanqing Gao
- Department of Agricultural Pharmacology, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - Shibin Shang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu, China
| | - Zhanqian Song
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu, China
| | - Jie Song
- Department of Chemistry and Biochemistry, University of Michigan-Flint, Flint, MI, USA
| | - Jian Li
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling, Shaanxi, China
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Akintemi EO, Govender KK, Singh T. A DFT study of the chemical reactivity properties, spectroscopy and bioactivity scores of bioactive flavonols. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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5
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Chung Y, Vermeire FH, Wu H, Walker PJ, Abraham MH, Green WH. Group Contribution and Machine Learning Approaches to Predict Abraham Solute Parameters, Solvation Free Energy, and Solvation Enthalpy. J Chem Inf Model 2022; 62:433-446. [PMID: 35044781 DOI: 10.1021/acs.jcim.1c01103] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We present a group contribution method (SoluteGC) and a machine learning model (SoluteML) to predict the Abraham solute parameters, as well as a machine learning model (DirectML) to predict solvation free energy and enthalpy at 298 K. The proposed group contribution method uses atom-centered functional groups with corrections for ring and polycyclic strain while the machine learning models adopt a directed message passing neural network. The solute parameters predicted from SoluteGC and SoluteML are used to calculate solvation energy and enthalpy via linear free energy relationships. Extensive data sets containing 8366 solute parameters, 20,253 solvation free energies, and 6322 solvation enthalpies are compiled in this work to train the models. The three models are each evaluated on the same test sets using both random and substructure-based solute splits for solvation energy and enthalpy predictions. The results show that the DirectML model is superior to the SoluteML and SoluteGC models for both predictions and can provide accuracy comparable to that of advanced quantum chemistry methods. Yet, even though the DirectML model performs better in general, all three models are useful for various purposes. Uncertain predicted values can be identified by comparing the three models, and when the 3 models are combined together, they can provide even more accurate predictions than any one of them individually. Finally, we present our compiled solute parameter, solvation energy, and solvation enthalpy databases (SoluteDB, dGsolvDBx, dHsolvDB) and provide public access to our final prediction models through a simple web-based tool, software packages, and source code.
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Affiliation(s)
- Yunsie Chung
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Florence H Vermeire
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Haoyang Wu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Pierre J Walker
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Michael H Abraham
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H OAJ, United Kingdom
| | - William H Green
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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6
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Grinberg Dana A, Wu H, Ranasinghe DS, Pickard FC, Wood GPF, Zelesky T, Sluggett GW, Mustakis J, Green WH. Kinetic Modeling of API Oxidation: (1) The AIBN/H 2O/CH 3OH Radical "Soup". Mol Pharm 2021; 18:3037-3049. [PMID: 34236207 DOI: 10.1021/acs.molpharmaceut.1c00261] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stress testing of active pharmaceutical ingredients (API) is an important tool used to gauge chemical stability and identify potential degradation products. While different flavors of API stress testing systems have been used in experimental investigations for decades, the detailed kinetics of such systems as well as the chemical composition of prominent reactive species, specifically reactive oxygen species, are unknown. As a first step toward understanding and modeling API oxidation in stress testing, we investigated a typical radical "soup" solution an API is subject to during stress testing. Here we applied ab initio electronic structure calculations to automatically generate and refine a detailed chemical kinetics model, taking a fresh look at API oxidation. We generated a detailed kinetic model for a representative azobis(isobutyronitrile) (AIBN)/H2O/CH3OH stress-testing system with a varied cosolvent ratio (50%/50%-99.5%/0.5% vol water/methanol) for 5.0 mM AIBN and representative pH values of 4-10 at 40 °C that was stirred and open to the atmosphere. At acidic conditions, hydroxymethyl alkoxyl is the dominant alkoxyl radical, and at basic conditions, for most studied initial methanol concentrations, cyanoisopropyl alkoxyl becomes the dominant alkoxyl radical, albeit at an overall lower concentration. At acidic conditions, the levels of cyanoisopropyl peroxyl, hydroxymethyl peroxyl, and hydroperoxyl radicals are relatively high and comparable, while, at both neutral and basic pH conditions, superoxide becomes the prominent radical in the system. The present work reveals the prominent species in a common model API stress testing system at various cosolvent and pH conditions, sets the stage for an in-depth quantitative API kinetic study, and demonstrates the usage of novel software tools for automated chemical kinetic model generation and ab initio refinement.
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Affiliation(s)
- Alon Grinberg Dana
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Wolfson Department of Chemical Engineering, Technion, Israel Institute of Technology, Haifa 3200003, Israel
| | - Haoyang Wu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Duminda S Ranasinghe
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Frank C Pickard
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Geoffrey P F Wood
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Todd Zelesky
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Gregory W Sluggett
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jason Mustakis
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - William H Green
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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7
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Le MD, Warth V, Giarracca L, Moine E, Bounaceur R, Privat R, Jaubert JN, Fournet R, Glaude PA, Sirjean B. Development of a Detailed Kinetic Model for the Oxidation of n-Butane in the Liquid Phase. J Phys Chem B 2021; 125:6955-6967. [PMID: 34132547 DOI: 10.1021/acs.jpcb.1c02988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The chemistry underlying liquid-phase oxidation of organic compounds, the main cause of their aging, is characterized by a free-radical chain reaction mechanism. The rigorous simulation of these phenomena requires the use of detailed kinetic models that contain thousands of species and reactions. The development of such models for the liquid phase remains a challenge as solvent-dependent thermokinetic parameters have to be provided for all the species and reactions of the model. Therefore, accurate and high-throughput methods to generate these data are required. In this work, we propose new methods to generate these data, and we apply them for the development of a detailed chemical kinetic model for n-butane autoxidation, which is then validated against literature data. Our approach for model development is based on the work of Jalan et al. [J. Phys. Chem. B 2013, 117, 2955-2970] who used Gibbs free energies of solvation [ΔsolvG(T)] to correct the data of the gas-phase kinetic model. In our approach, an equation of state (EoS) is used to compute ΔsolvG as a function of temperature for all the chemical species in the mechanism. Currently, ΔsolvG(T) of free radicals cannot be computed with an EoS and it was calculated for their parent molecule (H-atom added on the radical site). Theoretical calculations with the implicit solvent model were performed to quantify the impact of this assumption and showed that it is acceptable for radicals in n-butane and probably in all n-alkanes. New rate rules were proposed for the most important reactions of the model, based on theoretical calculations and the literature data. The developed detailed kinetic model for n-butane autoxidation is the first proposed model in the literature and was validated against the experimental data from the literature. Simulations showed that the main autoxidation products, sec-butyl hydroperoxides and 2-butanol, are produced from H-abstractions from n-butane by sec-C4H9OO radicals and the C4H9OO + C4H9OO reaction, respectively. The uncertainty of the product ratio ("butanone + 2-butanol"/"2-butoxy + 2-butoxy") of the latter reaction remains high in the literature, and our simulations suggest a 1:1 ratio in n-butane solvent.
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Affiliation(s)
- M D Le
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - V Warth
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - L Giarracca
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - E Moine
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - R Bounaceur
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - R Privat
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - J-N Jaubert
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - R Fournet
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - P-A Glaude
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - B Sirjean
- Laboratoire Réactions et Génie des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
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8
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Pathak Y, Mehta S, Priyakumar UD. Learning Atomic Interactions through Solvation Free Energy Prediction Using Graph Neural Networks. J Chem Inf Model 2021; 61:689-698. [PMID: 33546556 DOI: 10.1021/acs.jcim.0c01413] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Solvation free energy is a fundamental property that influences various chemical and biological processes, such as reaction rates, protein folding, drug binding, and bioavailability of drugs. In this work, we present a deep learning method based on graph networks to accurately predict solvation free energies of small organic molecules. The proposed model, comprising three phases, namely, message passing, interaction, and prediction, is able to predict solvation free energies in any generic organic solvent with a mean absolute error of 0.16 kcal/mol. In terms of accuracy, the current model outperforms all of the proposed machine learning-based models so far. The atomic interactions predicted in an unsupervised manner are able to explain the trends of free energies consistent with chemical wisdom. Further, the robustness of the machine learning-based model has been tested thoroughly, and its capability to interpret the predictions has been verified with several examples.
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Affiliation(s)
- Yashaswi Pathak
- Center for Computational Natural Sciences and Bioinformatics, International Institute of Information Technology, Hyderabad 500032, India
| | - Sarvesh Mehta
- Center for Computational Natural Sciences and Bioinformatics, International Institute of Information Technology, Hyderabad 500032, India
| | - U Deva Priyakumar
- Center for Computational Natural Sciences and Bioinformatics, International Institute of Information Technology, Hyderabad 500032, India
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9
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Magsumov TI, Sedov IA, Acree WE. Development of Abraham model correlations for enthalpies of solvation of solutes dissolved in N-methylformamide, 2-pyrrolidone and N-methylpyrrolidone. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114609] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Development of Abraham model correlations for short-chain glycol-grafted imidazolium and pyridinium ionic liquids from inverse gas-chromatographic measurements. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113983] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Acree WE, Churchill B, Abraham MH. Comments on “Classification of biphasic solvent systems according to Abraham descriptors for countercurrent chromatography”. J Chromatogr A 2020; 1618:460889. [DOI: 10.1016/j.chroma.2020.460889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 01/13/2020] [Indexed: 11/26/2022]
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12
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Chung Y, Gillis RJ, Green WH. Temperature‐dependent vapor–liquid equilibria and solvation free energy estimation from minimal data. AIChE J 2020. [DOI: 10.1002/aic.16976] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yunsie Chung
- Department of Chemical EngineeringMassachusetts Institute of Technology Cambridge Massachusetts USA
| | - Ryan J. Gillis
- Department of Chemical EngineeringMassachusetts Institute of Technology Cambridge Massachusetts USA
| | - William H. Green
- Department of Chemical EngineeringMassachusetts Institute of Technology Cambridge Massachusetts USA
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13
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Kuliaev PO, Pidko EA. Operando Modeling of Multicomponent Reactive Solutions in Homogeneous Catalysis: from Non-standard Free Energies to Reaction Network Control. ChemCatChem 2020; 12:795-802. [PMID: 32140181 PMCID: PMC7043346 DOI: 10.1002/cctc.201901911] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Indexed: 11/09/2022]
Abstract
Optimization and execution of chemical reactions are to a large extend based on experience and chemical intuition of a chemist. The chemical intuition is rooted in the phenomenological Le Chatelier's principle that teaches us how to shift equilibrium by manipulating the reaction conditions. To access the underlying thermodynamic parameters and their condition-dependencies from the first principles is a challenge. Here, we present a theoretical approach to model non-standard free energies for a complex catalytic CO2 hydrogenation system under operando conditions and identify the condition spaces where catalyst deactivation can potentially be suppressed. Investigation of the non-standard reaction free energy dependencies allows rationalizing the experimentally observed activity patterns and provides a practical approach to optimization of the reaction paths in complex multicomponent reactive catalytic systems.
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Affiliation(s)
- Pavel O. Kuliaev
- TheoMAT GroupITMO UniversityLomonosova 9St. Petersburg191002Russia
| | - Evgeny A. Pidko
- TheoMAT GroupITMO UniversityLomonosova 9St. Petersburg191002Russia
- Inorganic Systems Engineering Group Department of Chemical EngineeringDelft University of TechnologyVan der Maasweg 9Delft 2629 HZThe Netherlands
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14
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Jocher A, Vandewiele NM, Han K, Liu M, Gao CW, Gillis RJ, Green WH. Scalability strategies for automated reaction mechanism generation. Comput Chem Eng 2019. [DOI: 10.1016/j.compchemeng.2019.106578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Moine E, Privat R, Jaubert JN, Sirjean B, Novak N, Voutsas E, Boukouvalas C. Can we safely predict solvation Gibbs energies of pure and mixed solutes with a cubic equation of state? PURE APPL CHEM 2019. [DOI: 10.1515/pac-2018-1112] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Solvation Gibbs energies are basically defined as a chemical potential change when transferring a fixed molecule from a perfect gas to a real liquid mixture. This quantity is of special interest for many practical applications as it quantifies the degree of affinity of a solute for its solvent. Few methods are currently available in the literature for the prediction of solvation Gibbs energies. In this article, a new approach is proposed: the use of a predictive cubic equation of state (EoS). The UMR-PRU (Universal Mixing Rule Peng-Robinson UNIFAC) EoS has been selected for its known capacity to semi-predict behaviors of complex systems including polar and associating compounds (by semi-prediction, it is meant that the EoS predicts binary interaction parameters but requires pure-component properties as input parameters). UMR-PRU predictions have been compared to experimental data extracted from the extensive CompSol database (containing around 22 000 pure component data and 70 000 binary data). Accurate predictions were obtained (a mean absolute deviation of 0.36 kcal/mol was obtained for all the binary data). Finally, when using a fully-predictive approach (i.e. pure-component EoS parameters are predicted from group-contribution methods), the prediction accuracy is roughly preserved.
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Affiliation(s)
- Edouard Moine
- Laboratoire Réactions et Génie des Procédés (UMR CNRS 7274), Ecole Nationale Supérieure des Industries Chimiques, Université de Lorraine , 1 rue Grandville , Nancy 54000 , France
| | - Romain Privat
- Laboratoire Réactions et Génie des Procédés (UMR CNRS 7274), Ecole Nationale Supérieure des Industries Chimiques, Université de Lorraine , 1 rue Grandville , Nancy 54000 , France
| | - Jean-Noël Jaubert
- Laboratoire Réactions et Génie des Procédés (UMR CNRS 7274), Ecole Nationale Supérieure des Industries Chimiques, Université de Lorraine , 1 rue Grandville , Nancy 54000 , France
| | - Baptiste Sirjean
- Laboratoire Réactions et Génie des Procédés (UMR CNRS 7274), Ecole Nationale Supérieure des Industries Chimiques, Université de Lorraine , 1 rue Grandville , Nancy 54000 , France
| | - Nefeli Novak
- Laboratory of Thermodynamics and Transport Phenomena, School of Chemical Engineering , National Technical University of Athens , 9 Heroon, Polytechniou Str., Zografou Campus , Athens 15780 , Greece
| | - Epaminondas Voutsas
- Laboratory of Thermodynamics and Transport Phenomena, School of Chemical Engineering , National Technical University of Athens , 9 Heroon, Polytechniou Str., Zografou Campus , Athens 15780 , Greece
| | - Christos Boukouvalas
- Laboratory of Thermodynamics and Transport Phenomena, School of Chemical Engineering , National Technical University of Athens , 9 Heroon, Polytechniou Str., Zografou Campus , Athens 15780 , Greece
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16
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Characterization of the solubilizing ability of tetraalkylammonium ionic liquids containing a pendant alkyl chain bearing a basic N,N-dimethylamino or N,N-dimethylaminoethoxy functionality. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.066] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Borhani TN, García-Muñoz S, Vanesa Luciani C, Galindo A, Adjiman CS. Hybrid QSPR models for the prediction of the free energy of solvation of organic solute/solvent pairs. Phys Chem Chem Phys 2019; 21:13706-13720. [PMID: 31204418 DOI: 10.1039/c8cp07562j] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Due to the importance of the Gibbs free energy of solvation in understanding many physicochemical phenomena, including lipophilicity, phase equilibria and liquid-phase reaction equilibrium and kinetics, there is a need for predictive models that can be applied across large sets of solvents and solutes. In this paper, we propose two quantitative structure property relationships (QSPRs) to predict the Gibbs free energy of solvation, developed using partial least squares (PLS) and multivariate linear regression (MLR) methods for 295 solutes in 210 solvents with total number of data points of 1777. Unlike other QSPR models, the proposed models are not restricted to a specific solvent or solute. Furthermore, while most QSPR models include either experimental or quantum mechanical descriptors, the proposed models combine both, using experimental descriptors to represent the solvent and quantum mechanical descriptors to represent the solute. Up to twelve experimental descriptors and nine quantum mechanical descriptors are considered in the proposed models. Extensive internal and external validation is undertaken to assess model accuracy in predicting the Gibbs free energy of solvation for a large number of solute/solvent pairs. The best MLR model, which includes three solute descriptors and two solvent properties, yields a coefficient of determination (R2) of 0.88 and a root mean squared error (RMSE) of 0.59 kcal mol-1 for the training set. The best PLS model includes six latent variables, and has an R2 value of 0.91 and a RMSE of 0.52 kcal mol-1. The proposed models are compared to selected results based on continuum solvation quantum chemistry calculations. They enable the fast prediction of the Gibbs free energy of solvation of a wide range of solutes in different solvents.
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Affiliation(s)
- Tohid N Borhani
- Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
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18
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Affiliation(s)
- Belinda L. Slakman
- Department of Chemical Engineering Northeastern University Boston Massachusetts
| | - Richard H. West
- Department of Chemical Engineering Northeastern University Boston Massachusetts
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19
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Larsen D, Langhorn LM, Akselsen OM, Nielsen BE, Pittelkow M. Thiosemicarbazone organocatalysis: tetrahydropyranylation and 2-deoxygalactosylation reactions and kinetics-based mechanistic investigation. Chem Sci 2017; 8:7978-7982. [PMID: 29568444 PMCID: PMC5853554 DOI: 10.1039/c7sc03366d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/27/2017] [Indexed: 12/17/2022] Open
Abstract
The first use of thiosemicarbazone-based organocatalysis was demonstrated on both tetrahydropyranylation and 2-deoxygalactosylation reactions. The organocatalysts were optimised using kinetics-based selection. The best catalyst outperformed previously reported thiourea catalysts for tetrahydropyranylation by 50-fold. Hammett investigations of both the organocatalyst and the substrate indicate an oxyanion hole-like reaction mechanism.
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Affiliation(s)
- Dennis Larsen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark .
| | - Line M Langhorn
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark .
| | - Olivia M Akselsen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark .
| | - Bjarne E Nielsen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark .
| | - Michael Pittelkow
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark .
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20
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21
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Van de Vijver R, Vandewiele NM, Bhoorasingh PL, Slakman BL, Seyedzadeh Khanshan F, Carstensen HH, Reyniers MF, Marin GB, West RH, Van Geem KM. Automatic Mechanism and Kinetic Model Generation for Gas- and Solution-Phase Processes: A Perspective on Best Practices, Recent Advances, and Future Challenges. INT J CHEM KINET 2015. [DOI: 10.1002/kin.20902] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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22
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Popov KV, Knyazev VD. Molecular dynamics simulation of C-C bond scission in polyethylene and linear alkanes: effects of the condensed phase. J Phys Chem A 2014; 118:2187-95. [PMID: 24571517 DOI: 10.1021/jp411474u] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of C-C bond scission in polyethylene chains of various lengths was studied using molecular dynamics under the conditions of vacuum and condensed phase (polymer melt). A method of assigning meaningful rate constant values to condensed-phase bond scission reactions based on a kinetic mechanism accounting for dissociation, reverse recombination, and diffusional separation of fragments was developed. The developed method accounts for such condensed-phase phenomena as cage effects and diffusion of the decay products away from the reaction site. The results of C-C scission simulations indicate that per-bond rate constants decrease by an order of magnitude as the density of the system increases from vacuum to the normal density of a polyethylene melt. Additional calculations were performed to study the dependence of the rate constant on the length of the polymer chain under the conditions of the condensed phase. The calculations demonstrate that the rate constant is independent of the degree of polymerization if polyethylene samples of different lengths are kept at the same pressure. However, if instead molecular systems of different polyethylene chain lengths decompose under the conditions of the same density, shorter chains result in higher pressures and lower rate constants. The observed effect is attributed to a higher degree of molecular crowding (lower fraction of free intermolecular space available for molecular motion) in the case of shorter molecules.
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Affiliation(s)
- Konstantin V Popov
- Research Center for Chemical Kinetics, Department of Chemistry, The Catholic University of America , Washington, DC 20064, United States
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23
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Bogatko S, Cauët E, Geerlings P, De Proft F. On the coupling of solvent characteristics to the electronic structure of solute molecules. Phys Chem Chem Phys 2014; 16:3807-14. [PMID: 24435016 DOI: 10.1039/c3cp54944e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We present the results of a theoretical investigation focusing on the solvent structure surrounding the -1, 0 and +1 charged species of F, Cl, Br and I halogen atoms and F2, Cl2, Br2 and I2 di-halogen molecules in a methanol solvent and its influence on the electronic structure of the solute molecules. Our results show a large stabilizing effect arising from the solute-solvent interactions. Well-formed first solvation shells are observed for all species, the structure of which is strongly influenced by the charge of the solute species. Detailed analysis reveals that coordination number, CN, solvent orientation, θ, and solute-solvent distance, d, are important structural characteristics which are coupled to changes in the electronic structure of the solute. We propose that the fundamental chemistry of any solute species is generally regulated by these solvent degrees of freedom.
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Affiliation(s)
- Stuart Bogatko
- Eenheid Algemene Chemie, Vrije Universiteit Brussel (VUB), Faculteit Wetenschappen, Pleinlaan 2, 1050 Brussels, Belgium.
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24
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Lipophilicity assessment of ruthenium(II)-arene complexes by the means of reversed-phase thin-layer chromatography and DFT calculations. ScientificWorldJournal 2014; 2014:862796. [PMID: 24587761 PMCID: PMC3919081 DOI: 10.1155/2014/862796] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 10/28/2013] [Indexed: 11/18/2022] Open
Abstract
The lipophilicity of ten ruthenium(II)-arene complexes was assessed by reversed-phase thin-layer chromatography (RP-TLC) on octadecyl silica stationary phase. The binary solvent systems composed of water and acetonitrile were used as mobile phase in order to determine chromatographic descriptors for lipophilicity estimation. Octanol-water partition coefficient, logKOW, of tested complexes was experimentally determined using twenty-eight standard solutes which were analyzed under the same chromatographic conditions as target substances. In addition, ab initio density functional theory (DFT) computational approach was employed to calculate logKOW values from the differences in Gibbs' free solvation energies of the solute transfer from n-octanol to water. A good overall agreement between DFT calculated and experimentally determined logKOW values was established (R2 = 0.8024–0.9658).
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25
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Computer-aided molecular design of solvents for accelerated reaction kinetics. Nat Chem 2013; 5:952-7. [DOI: 10.1038/nchem.1755] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/12/2013] [Indexed: 11/08/2022]
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26
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Jalan A, Alecu IM, Meana-Pañeda R, Aguilera-Iparraguirre J, Yang KR, Merchant SS, Truhlar DG, Green WH. New pathways for formation of acids and carbonyl products in low-temperature oxidation: the Korcek decomposition of γ-ketohydroperoxides. J Am Chem Soc 2013; 135:11100-14. [PMID: 23862563 DOI: 10.1021/ja4034439] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present new reaction pathways relevant to low-temperature oxidation in gaseous and condensed phases. The new pathways originate from γ-ketohydroperoxides (KHP), which are well-known products in low-temperature oxidation and are assumed to react only via homolytic O-O dissociation in existing kinetic models. Our ab initio calculations identify new exothermic reactions of KHP forming a cyclic peroxide isomer, which decomposes via novel concerted reactions into carbonyl and carboxylic acid products. Geometries and frequencies of all stationary points are obtained using the M06-2X/MG3S DFT model chemistry, and energies are refined using RCCSD(T)-F12a/cc-pVTZ-F12 single-point calculations. Thermal rate coefficients are computed using variational transition-state theory (VTST) calculations with multidimensional tunneling contributions based on small-curvature tunneling (SCT). These are combined with multistructural partition functions (Q(MS-T)) to obtain direct dynamics multipath (MP-VTST/SCT) gas-phase rate coefficients. For comparison with liquid-phase measurements, solvent effects are included using continuum dielectric solvation models. The predicted rate coefficients are found to be in excellent agreement with experiment when due consideration is made for acid-catalyzed isomerization. This work provides theoretical confirmation of the 30-year-old hypothesis of Korcek and co-workers that KHPs are precursors to carboxylic acid formation, resolving an open problem in the kinetics of liquid-phase autoxidation. The significance of the new pathways in atmospheric chemistry, low-temperature combustion, and oxidation of biological lipids are discussed.
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Affiliation(s)
- Amrit Jalan
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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27
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Ahmed A, Sandler SI. Hydration Free Energies of Multifunctional Nitroaromatic Compounds. J Chem Theory Comput 2013; 9:2774-85. [DOI: 10.1021/ct3011002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Alauddin Ahmed
- Department
of Chemical and Biomolecular Engineering,
University of Delaware, Newark, Delaware 19716, United States
| | - Stanley I. Sandler
- Department
of Chemical and Biomolecular Engineering,
University of Delaware, Newark, Delaware 19716, United States
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28
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Jalan A, West RH, Green WH. An Extensible Framework for Capturing Solvent Effects in Computer Generated Kinetic Models. J Phys Chem B 2013; 117:2955-70. [DOI: 10.1021/jp310824h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amrit Jalan
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge,
Massachusetts 02139, United States
| | - Richard H. West
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge,
Massachusetts 02139, United States
| | - William H. Green
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge,
Massachusetts 02139, United States
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29
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Mihaylov T, Parac-Vogt T, Pierloot K. Unraveling the Mechanisms of Carboxyl Ester Bond Hydrolysis Catalyzed by a Vanadate Anion. Inorg Chem 2012; 51:9619-28. [DOI: 10.1021/ic300620b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tzvetan Mihaylov
- Chemistry Departement, University of Leuven, Celestijnenlaan 200F, B-3001
Leuven, Belgium
| | - Tatjana Parac-Vogt
- Chemistry Departement, University of Leuven, Celestijnenlaan 200F, B-3001
Leuven, Belgium
| | - Kristine Pierloot
- Chemistry Departement, University of Leuven, Celestijnenlaan 200F, B-3001
Leuven, Belgium
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