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Chakraborty B, Pal R, Pratihar DK, Chattaraj PK. Bonobo Optimizer: A New Tool Toward the Global Optimization of Small Atomic Clusters. J Phys Chem A 2024. [PMID: 38696762 DOI: 10.1021/acs.jpca.4c02024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2024]
Abstract
In the realm of structural and bonding investigations within chemical systems, elucidating global minimum energy configurations stands as a paramount goal. As the systems increase in size and complexity, this pursuit becomes progressively challenging. Herein, we introduce Bonobo optimizer (BO), a metaheuristic algorithm inspired by the social and reproductive behaviors of bonobos, to the domain of chemical problem solving. Focusing on small carbon clusters, this study systematically evaluates BO's performance, showcasing its robustness and efficiency. Parametric studies highlight the algorithm's adaptability, consistently converging to global minimum structures. Rigorous statistical validation supports the results, and a comparative analysis against established global optimization algorithms underlines BO's superior efficiency. This exploration extends the applicability of BO to the optimization of atomic clusters, providing a promising avenue for future advancements in computational chemistry.
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Affiliation(s)
- Bhrigu Chakraborty
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ranita Pal
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Dilip Kumar Pratihar
- Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand 835215, India
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Pal R, Das P, Chattaraj PK. Global Optimization: A Soft Computing Perspective. J Phys Chem Lett 2023; 14:3468-3482. [PMID: 37011157 DOI: 10.1021/acs.jpclett.3c00246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Tackling the problem of global optimization is one of the most important domains that physicists and chemists are working on. The use of soft computing (SC) techniques has made this easier by reducing nonlinearity and instability and making it technologically rich. This Perspective aims at explaining the basic mathematical models of the most efficient and commonly used SC techniques in computational chemistry for finding the global minimum (GM) energy structures of chemical systems. In this Perspective, we discuss the global optimizations of several chemical systems that our group has worked on using CNN, PSO, FA, ABC, BO, and some hybrid techniques, two of which are interfaced to achieve better-quality results.
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Affiliation(s)
- Ranita Pal
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Prasenjit Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Tan LP, Die D, Zheng BX. Growth mechanism, electronic properties and spectra of aluminum clusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120545. [PMID: 34739894 DOI: 10.1016/j.saa.2021.120545] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/29/2021] [Accepted: 10/24/2021] [Indexed: 06/13/2023]
Abstract
Density functional theory (DFT) and particle swarm optimization (PSO) have been applied to study the growth behavior, electronic properties and spectra of neutral, anionic and cationic aluminum clusters with 3-20 atoms. Many isomers have been obtained through a comprehensive structural search. The results indicate that the ground state structures of neutral and anionic aluminum clusters follow an identical periodic growth law. When the number of atoms is 6-11 and 13-18, Al atoms in these clusters grow around an octahedral cluster nucleus and an icosahedral cluster nucleus, respectively. For Aln+ (n ≤ 14 and n ≠ 7) clusters, the most stable structure is different from that of Aln or Aln-clusters. When n > 14, the ground state structure of Aln+ clusters is similar to that of Aln or Aln-clusters. The electronic properties of aluminum clusters have been analyzed by the averaged binding energy, second-order difference of energy, energy gap and dissociation energy. It is found that the Al7+ and Al13- clusters have very high stability and a large energy gap and can be regarded as two superatoms. The aluminum cluster with 18 or 40 valence electrons are the least likely to lose an electron. The dissociation behavior of Aln+ clusters caused by collision is reasonably explained by means of the dissociation energy. The optical absorption spectra of neutral aluminum clusters have been simulated by using the time-dependent density functional theory. The ground states of anionic aluminum clusters have been determined by comparing theoretical photoelectron spectra (PES) with experimental findings. Infrared and Raman spectra of cationic aluminum clusters have been forecasted and can assist in identifying the most stable structure in future experiments.
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Affiliation(s)
- Li-Ping Tan
- School of Science, Xihua University, Chengdu 610039, China
| | - Dong Die
- School of Science, Xihua University, Chengdu 610039, China.
| | - Ben-Xia Zheng
- School of Science, Xihua University, Chengdu 610039, China
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Pal R, Poddar A, Chattaraj PK. Atomic Clusters: Structure, Reactivity, Bonding, and Dynamics. Front Chem 2021; 9:730548. [PMID: 34485247 PMCID: PMC8415529 DOI: 10.3389/fchem.2021.730548] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 07/13/2021] [Indexed: 11/13/2022] Open
Abstract
Atomic clusters lie somewhere in between isolated atoms and extended solids with distinctly different reactivity patterns. They are known to be useful as catalysts facilitating several reactions of industrial importance. Various machine learning based techniques have been adopted in generating their global minimum energy structures. Bond-stretch isomerism, aromatic stabilization, Rener-Teller effect, improved superhalogen/superalkali properties, and electride characteristics are some of the hallmarks of these clusters. Different all-metal and nonmetal clusters exhibit a variety of aromatic characteristics. Some of these clusters are dynamically stable as exemplified through their fluxional behavior. Several of these cluster cavitands are found to be agents for effective confinement. The confined media cause drastic changes in bonding, reactivity, and other properties, for example, bonding between two noble gas atoms, and remarkable acceleration in the rate of a chemical reaction under confinement. They have potential to be good hydrogen storage materials and also to activate small molecules for various purposes. Many atomic clusters show exceptional opto-electronic, magnetic, and nonlinear optical properties. In this Review article, we intend to highlight all these aspects.
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Affiliation(s)
- Ranita Pal
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Arpita Poddar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
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Terayama K, Sumita M, Katouda M, Tsuda K, Okuno Y. Efficient Search for Energetically Favorable Molecular Conformations against Metastable States via Gray-Box Optimization. J Chem Theory Comput 2021; 17:5419-5427. [PMID: 34261321 DOI: 10.1021/acs.jctc.1c00301] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In order to accurately understand and estimate molecular properties, finding energetically favorable molecular conformations is the most fundamental task for atomistic computational research on molecules and materials. Geometry optimization based on quantum chemical calculations has enabled the conformation prediction of arbitrary molecules, including de novo ones. However, it is computationally expensive to perform geometry optimizations for enormous conformers. In this study, we introduce the gray-box optimization (GBO) framework, which enables optimal control over the entire geometry optimization process, among multiple conformers. Algorithms designed for GBO roughly estimate energetically preferable conformers during their geometry optimization iterations. They then preferentially compute promising conformers. To evaluate the performance of the GBO framework, we applied it to a test set consisting of seven dipeptides and mycophenolic acid to determine their stable conformations at the density functional theory level. We thus preferentially obtained energetically favorable conformations. Furthermore, the computational costs required to find the most stable conformation were significantly reduced (approximately 1% on average, compared to the naive approach for the dipeptides).
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Affiliation(s)
- Kei Terayama
- Graduate School of Medical Life Science, Yokohama City University, Tsurumi-ku, Yokohama 230-0045, Japan.,RIKEN Center for Advanced Intelligence Project, Tokyo 103-0027, Japan.,Medical Sciences Innovation Hub Program, RIKEN, Yokohama 230-0045, Japan.,Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masato Sumita
- RIKEN Center for Advanced Intelligence Project, Tokyo 103-0027, Japan.,International Center for Materials Nanoarchitectonics(WPI-MANA), National Institute for Materials Science, Tsukuba 305-0044, Japan
| | - Michio Katouda
- Department of Computational Science and Technology, Research Organization for Information Science and Technology, Minato-ku, Tokyo 105-0013, Japan.,Waseda Research Institute for Science and Engineering, Waseda University, Sinjuku-ku, Tokyo 169-8555, Japan
| | - Koji Tsuda
- RIKEN Center for Advanced Intelligence Project, Tokyo 103-0027, Japan.,Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan.,Research and Services Division of Materials Data and Integrated System, National Institute for Materials Science, Tsukuba 305-0047, Japan
| | - Yasushi Okuno
- Medical Sciences Innovation Hub Program, RIKEN, Yokohama 230-0045, Japan.,Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan
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