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Mó O, Montero-Campillo MM, Yáñez M, Alkorta I, Elguero J. A Holistic View of the Interactions between Electron-Deficient Systems: Clustering of Beryllium and Magnesium Hydrides and Halides. Molecules 2023; 28:7507. [PMID: 38005228 PMCID: PMC10673300 DOI: 10.3390/molecules28227507] [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: 10/03/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
In the search for common bonding patterns in pure and mixed clusters of beryllium and magnesium derivatives, the most stable dimers and trimers involving BeX2 and MgX2 (X = H, F, Cl) have been studied in the gas phase using B3LYP and M06-2X DFT methods and the G4 ab initio composite procedure. To obtain some insight into their structure, stability, and bonding characteristics, we have used two different energy decomposition formalisms, namely MBIE and LMO-EDA, in parallel with the analysis of the electron density with the help of QTAIM, ELF, NCIPLOT, and AdNDP approaches. Some interesting differences are already observed in the dimers, where the stability sequence observed for the hydrides differs entirely from that of the fluorides and chlorides. Trimers also show some peculiarities associated with the presence of compact trigonal cyclic structures that compete in stability with the more conventional hexagonal and linear forms. As observed for dimers, the stability of the trimers changes significantly from hydrides to fluorides or chlorides. Although some of these clusters were previously explored in the literature, the novelty of this work is to provide a holistic approach to the entire series of compounds by using chemical bonding tools, allowing us to understand the stability trends in detail and providing insights for a significant number of new, unexplored structures.
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Affiliation(s)
- Otilia Mó
- Departamento de Química, Módulo 13, Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; (O.M.); (M.Y.)
| | - M. Merced Montero-Campillo
- Departamento de Química, Módulo 13, Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; (O.M.); (M.Y.)
| | - Manuel Yáñez
- Departamento de Química, Módulo 13, Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; (O.M.); (M.Y.)
| | - Ibon Alkorta
- Instituto de Química Médica, IQM-CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain;
| | - José Elguero
- Instituto de Química Médica, IQM-CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain;
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Pedrielli A, Trevisanutto PE, Monacelli L, Garberoglio G, Pugno NM, Taioli S. Understanding anharmonic effects on hydrogen desorption characteristics of Mg nH 2n nanoclusters by ab initio trained deep neural network. NANOSCALE 2022; 14:5589-5599. [PMID: 35344577 DOI: 10.1039/d1nr08359g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Magnesium hydride (MgH2) has been widely studied for effective hydrogen storage. However, its bulk desorption temperature (553 K) is deemed too high for practical applications. Besides doping, a strategy to decrease such reaction energy for releasing hydrogen is the use of MgH2-based nanoparticles (NPs). Here, we investigate first the thermodynamic properties of MgnH2n NPs (n < 10) from first-principles, in particular by assessing the anharmonic effects on the enthalpy, entropy and thermal expansion by means of the stochastic self consistent harmonic approximation (SSCHA). This method goes beyond previous approaches, typically based on molecular mechanics and the quasi-harmonic approximation, allowing the ab initio calculation of the fully-anharmonic free energy. We find an almost linear dependence on temperature of the interatomic bond lengths - with a relative variation of few percent over 300 K - alongside with a bond distance decrease of the Mg-H bonds. In order to increase the size of MgnH2n NPs toward experiments of hydrogen desorption we devise a computationally effective machine learning model trained to accurately determine the forces and total energies (i.e. the potential energy surfaces), integrating the latter with the SSCHA model to fully include the anharmonic effects. We find a significative decrease of the H-desorption temperature for sub-nanometric clusters MgnH2n with n ≤ 10, with a non-negligible, although little effect due to anharmonicities (up to 10%).
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Affiliation(s)
- Andrea Pedrielli
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Fondazione Bruno Kessler), Trento, Italy.
- Laboratory for Bioinspired, Bionic, Nano, Meta Materials and Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
| | - Paolo E Trevisanutto
- Dipartimento di Ingegneria, Unità di Ricerca di Fisica non lineare e Modelli matematici, Università Campus Bio-Medico, Via Alvaro del Portillo 21, Roma, 00154, Italy
| | | | - Giovanni Garberoglio
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Fondazione Bruno Kessler), Trento, Italy.
- Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Italy
| | - Nicola M Pugno
- Laboratory for Bioinspired, Bionic, Nano, Meta Materials and Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
- School of Engineering and Materials Science, Queen Mary University of London, UK
| | - Simone Taioli
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*-Fondazione Bruno Kessler), Trento, Italy.
- Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Italy
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Xie X, Persson KA, Small DW. Incorporating Electronic Information into Machine Learning Potential Energy Surfaces via Approaching the Ground-State Electronic Energy as a Function of Atom-Based Electronic Populations. J Chem Theory Comput 2020; 16:4256-4270. [PMID: 32502350 DOI: 10.1021/acs.jctc.0c00217] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Machine learning (ML) approximations to density functional theory (DFT) potential energy surfaces (PESs) are showing great promise for reducing the computational cost of accurate molecular simulations, but at present, they are not applicable to varying electronic states, and in particular, they are not well suited for molecular systems in which the local electronic structure is sensitive to the medium to long-range electronic environment. With this issue as the focal point, we present a new machine learning approach called "BpopNN" for obtaining efficient approximations to DFT PESs. Conceptually, the methodology is based on approaching the true DFT energy as a function of electron populations on atoms; in practice, this is realized with available density functionals and constrained DFT (CDFT). The new approach creates approximations to this function with neural networks. These approximations thereby incorporate electronic information naturally into a ML approach, and optimizing the model energy with respect to populations allows the electronic terms to self-consistently adapt to the environment, as in DFT. We confirm the effectiveness of this approach with a variety of calculations on LinHn clusters.
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Affiliation(s)
- Xiaowei Xie
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kristin A Persson
- Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - David W Small
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Molecular Graphics and Computation Facility, College of Chemistry, University of California, Berkeley 94720, California United States
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4
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Hydrides, alkalides, and halides of calcium metal chain: electronic structure and NLO property. Struct Chem 2018. [DOI: 10.1007/s11224-017-1069-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Oliveira BG. The interaction strength of intermolecular systems formed by NaH⋯2(HF) and NaH⋯4(HF): Hydrogen bonds, dihydrogen bonds and halogen–hydride bonds. CR CHIM 2016. [DOI: 10.1016/j.crci.2016.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Banerjee P, Nandi PK. Electronic structures and second hyperpolarizabilities of alkaline earth metal complexes end-capped with NA2 (A = H, Li, Na). Phys Chem Chem Phys 2016; 18:12505-20. [DOI: 10.1039/c5cp07661g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The ground state structures and NLO properties of a number of alkaline earth metal complexes end-capped with NA2 groups (A = H, Li, Na) are calculated by employing the CAM-B3LYP, wB97XD and B2PLYP functionals along with MP2 and CCSD(T) for 6-311++G(d,p), 6-311++G(3df,3pd), aug-cc-pVTZ, aug-pc-2 and Hypol basis sets.
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Affiliation(s)
- Paramita Banerjee
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Prasanta K. Nandi
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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ESRAFILI MEHDID, ELMI FATEMEH, HADIPOUR NASSERL. DENSITY FUNCTIONAL THEORY STUDY OF BINDING ENERGIES, 7Li NUCLEAR MAGNETIC SHIELDING, AND ELECTRIC FIELD GRADIENT TENSORS ON THE SMALL CLUSTERS OF LinHm (m ≤ n ≤ 4). JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s021963360700343x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The binding energies, geometries, 7 Li magnetic shielding, and electric field gradient tensors of hydrogenated lithium clusters, Li n H m (m ≤ n ≤ 4), were studied via density functional theory approach. We optimized the structures using B3LYP functional and 6-311++G (2d,2p) basis set. The calculated binding energies of lithium hydride clusters indicate that hydrogenation energy of Li n H m clusters decreases as the number of hydrogen atoms within the cluster increases. Our calculations also showed that for n = 4 clusters, the three-dimensional structure is more stable than the planar one. The study of the trends in the 7 Li magnetic shielding isotropy, σiso, and anisotropies, Δσ, values are explained in terms of the interplay between the electronic and geometrical effects. The variations in the 7 Li nuclear quadrupole coupling constants, χ, and their associated asymmetry parameters, ηQ, for different isomers of the lithium hydride clusters and the influence of hydrogenation on the EFG tensors are also discussed. For n = 4, we obtained a noticeable difference in the χ value from the planar to the three-dimensional structures. The atoms in molecules (AIM) analysis at the Li–H bond critical point reveals remarkably different topographical properties of the charge density and associated Laplacian fields for the planar and three-dimensional lithium hydride clusters.
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Affiliation(s)
| | - FATEMEH ELMI
- Department of Chemistry, Tarbiat Modares University, Tehran, Iran
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Gautam S, Dharamvir K, Goel N. Structural Evolution and Stability of Hydrogenated Lin (n = 1–30) Clusters: A Density Functional Study. J Phys Chem A 2011; 115:6383-9. [DOI: 10.1021/jp202493u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seema Gautam
- Department of Physics & Center of Advanced Studies in Physics and ‡Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh-160014, India
| | - Keya Dharamvir
- Department of Physics & Center of Advanced Studies in Physics and ‡Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh-160014, India
| | - Neetu Goel
- Department of Physics & Center of Advanced Studies in Physics and ‡Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh-160014, India
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Bheema Lingam C, Ramesh Babu K, Tewari SP, Vaitheeswaran G. Quantum chemical studies on beryllium hydride oligomers. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2010.10.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Ojwang JGO, van Santen R, Kramer GJ, van Duin ACT, Goddard WA. Modeling the sorption dynamics of NaH using a reactive force field. J Chem Phys 2008; 128:164714. [DOI: 10.1063/1.2908737] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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