1
|
Khire SS, Gattadahalli N, Gurav ND, Kumar A, Gadre SR. Constructing Potential Energy Surface with Correlated Theory for Dipeptides Using Molecular Tailoring Approach. Chemphyschem 2023; 24:e202200784. [PMID: 36735449 DOI: 10.1002/cphc.202200784] [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: 10/19/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/04/2023]
Abstract
We demonstrate a cost-effective alternative employing the fragment-based molecular tailoring approach (MTA) for building the potential energy surface (PES) for two dipeptides viz. alanine-alanine and alanine-proline employing correlated theory, with augmented Dunning basis sets. About 1369 geometries are generated for each test dipeptide by systematically varying the dihedral angles Φ ${{\rm{\Phi }}}$ and Ψ ${{{\Psi }}}$ . These conformational geometries are partially optimized by relaxing all the other Z-matrix parameters, fixing the values of Φ ${{\rm{\Phi }}}$ and Ψ ${{{\Psi }}}$ . The MP2 level PES is constructed from the MTA-energies of chemically intact geometries using minimal hardware. The fidelity of MP2/aug-cc-pVDZ level PES is brought out by comparing it with its full calculation counterpart. Further, we bring out the power of the method by reporting the MTA-based CCSD/aug-cc-pVDZ level PES for these two dipeptides containing 498 and 562 basis functions respectively.
Collapse
Affiliation(s)
- Subodh S Khire
- RIKEN Center for Computational Science, Kobe, 650-0047, Japan.,Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India
| | - Nandini Gattadahalli
- Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India
| | - Nalini D Gurav
- Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India.,Organisch-Chemisches Institut and Center for Multiscale Theory and Computation (CMTC), Westfälische Wilhelms-Universität Münster, Corrensstrasse 36, 48149, Münster, Germany
| | - Anmol Kumar
- School of Pharmacy, University of Maryland, Baltimore, 20 Penn Street, HSFII, Baltimore, Maryland, 21201, U.S.A
| | - Shridhar R Gadre
- Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India
| |
Collapse
|
2
|
Molecular Tailoring Approach for the Estimation of Intramolecular Hydrogen Bond Energy. Molecules 2021; 26:molecules26102928. [PMID: 34069140 PMCID: PMC8155843 DOI: 10.3390/molecules26102928] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/29/2022] Open
Abstract
Hydrogen bonds (HBs) play a crucial role in many physicochemical and biological processes. Theoretical methods can reliably estimate the intermolecular HB energies. However, the methods for the quantification of intramolecular HB (IHB) energy available in the literature are mostly empirical or indirect and limited only to evaluating the energy of a single HB. During the past decade, the authors have developed a direct procedure for the IHB energy estimation based on the molecular tailoring approach (MTA), a fragmentation method. This MTA-based method can yield a reliable estimate of individual IHB energy in a system containing multiple H-bonds. After explaining and illustrating the methodology of MTA, we present its use for the IHB energy estimation in molecules and clusters. We also discuss the use of this method by other researchers as a standard, state-of-the-art method for estimating IHB energy as well as those of other noncovalent interactions.
Collapse
|
3
|
Schwinn K, Ferré N, Huix-Rotllant M. Efficient Analytic Second Derivative of Electrostatic Embedding QM/MM Energy: Normal Mode Analysis of Plant Cryptochrome. J Chem Theory Comput 2020; 16:3816-3824. [PMID: 32320612 DOI: 10.1021/acs.jctc.9b01145] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Analytic second derivatives of electrostatic embedding (EE) quantum mechanics/molecular mechanics (QM/MM) energy are important for performing vibrational analysis and simulating vibrational spectra of quantum systems interacting with an environment represented as a classical electrostatic potential. The main bottleneck of EE-QM/MM second derivatives is the solution of coupled perturbed equations for each MM atom perturbation. Here, we exploit the Q-vector method [J. Chem. Phys., 2019, 151, 041102] to workaround this bottleneck. We derive the full analytic second derivative of the EE-QM/MM energy, which allows us to compute QM, MM, and QM-MM Hessian blocks in an efficient and easy to implement manner. To show the capabilities of our method, we compute the normal modes for the full Arabidopsis thaliana plant cryptochrome. We show that the flavin adenine dinucleotide vibrations (QM subsystem) strongly mix with protein modes. We compute approximate vibronic couplings for the lowest bright transition, from which we extract spectral densities and the homogeneous broadening of FAD absorption spectrum in protein using vibrationally resolved electronic spectrum simulations.
Collapse
|
4
|
Abstract
Since the introduction of the fragment molecular orbital method 20 years ago, fragment-based approaches have occupied a small but growing niche in quantum chemistry. These methods decompose a large molecular system into subsystems small enough to be amenable to electronic structure calculations, following which the subsystem information is reassembled in order to approximate an otherwise intractable supersystem calculation. Fragmentation sidesteps the steep rise (with respect to system size) in the cost of ab initio calculations, replacing it with a distributed cost across numerous computer processors. Such methods are attractive, in part, because they are easily parallelizable and therefore readily amenable to exascale computing. As such, there has been hope that distributed computing might offer the proverbial "free lunch" in quantum chemistry, with the entrée being high-level calculations on very large systems. While fragment-based quantum chemistry can count many success stories, there also exists a seedy underbelly of rarely acknowledged problems. As these methods begin to mature, it is time to have a serious conversation about what they can and cannot be expected to accomplish in the near future. Both successes and challenges are highlighted in this Perspective.
Collapse
Affiliation(s)
- John M Herbert
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| |
Collapse
|
5
|
Biswas A, Priyadarsini A, Mallik BS. Dynamics and Spectral Response of Water Molecules around Tetramethylammonium Cation. J Phys Chem B 2019; 123:8753-8766. [DOI: 10.1021/acs.jpcb.9b05466] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aritri Biswas
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana India
| | - Adyasa Priyadarsini
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana India
| | - Bhabani S. Mallik
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana India
| |
Collapse
|
6
|
Liu J, Rana B, Liu KY, Herbert JM. Variational Formulation of the Generalized Many-Body Expansion with Self-Consistent Charge Embedding: Simple and Correct Analytic Energy Gradient for Fragment-Based ab Initio Molecular Dynamics. J Phys Chem Lett 2019; 10:3877-3886. [PMID: 31251619 DOI: 10.1021/acs.jpclett.9b01214] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The many-body expansion (MBE) and its extension to overlapping fragments, the generalized (G)MBE, constitute the theoretical basis for most fragment-based approaches for large-scale quantum chemistry. We reformulate the GMBE for use with embedding charges determined self-consistently from the fragment wave functions, in a manner that preserves the variational nature of the underlying self-consistent field method. As a result, the analytic gradient retains the simple "sum of fragment gradients" form that is often assumed in practice, sometimes incorrectly. This obviates (without approximation) the need to solve coupled-perturbed equations, and we demonstrate stable, fragment-based ab initio molecular dynamics simulations using this technique. Energy conservation fails when charge-response contributions to the Fock matrix are neglected, even while geometry optimizations and vibrational frequency calculations may yet be accurate. Stable simulations can be recovered by means of straightforward modifications introduced here, providing a general paradigm for fragment-based ab initio molecular dynamics.
Collapse
Affiliation(s)
- Jie Liu
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Bhaskar Rana
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Kuan-Yu Liu
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - John M Herbert
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| |
Collapse
|
7
|
Development of a new parameter optimization scheme for a reactive force field based on a machine learning approach. J Comput Chem 2019; 40:2000-2012. [DOI: 10.1002/jcc.25841] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/17/2019] [Accepted: 03/27/2019] [Indexed: 12/14/2022]
|
8
|
Nakata H, Fedorov DG. Simulations of infrared and Raman spectra in solution using the fragment molecular orbital method. Phys Chem Chem Phys 2019; 21:13641-13652. [DOI: 10.1039/c9cp00940j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Calculation of IR and Raman spectra in solution for large molecular systems made possible with analytic FMO/PCM Hessians.
Collapse
Affiliation(s)
| | - Dmitri G. Fedorov
- Research Center for Computational Design of Advanced Functional Materials (CD-FMat)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| |
Collapse
|
9
|
Debnath S, Sengupta A, Jose KVJ, Raghavachari K. Fragment-Based Approaches for Supramolecular Interaction Energies: Applications to Foldamers and Their Complexes with Anions. J Chem Theory Comput 2018; 14:6226-6239. [DOI: 10.1021/acs.jctc.8b00525] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sibali Debnath
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Arkajyoti Sengupta
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - K. V. Jovan Jose
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
10
|
Nakata H, Fedorov DG. Analytic second derivatives for the efficient electrostatic embedding in the fragment molecular orbital method. J Comput Chem 2018; 39:2039-2050. [DOI: 10.1002/jcc.25360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/27/2018] [Accepted: 04/29/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Hiroya Nakata
- Department of Fundamental Technology Research; Research and Development Center Kagoshima, Kyocera, 1-4 Kokubu Yamashita-cho; Kirishima-shi Kagoshima, 899-4312 Japan
| | - Dmitri G. Fedorov
- Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono; Tsukuba Ibaraki, 305-8568 Japan
| |
Collapse
|
11
|
Khire SS, Bartolotti LJ, Gadre SR. Harmonizing accuracy and efficiency: A pragmatic approach to fragmentation of large molecules. J Chem Phys 2018; 149:064112. [PMID: 30111143 DOI: 10.1063/1.5036595] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Fragmentation methods offer an attractive alternative for ab initio treatment of large molecules and molecular clusters. However, balancing the accuracy and efficiency of these methods is a tight-rope-act. With this in view, we present an algorithm for automatic molecular fragmentation within Molecular Tailoring Approach (MTA) achieving this delicate balance. The automated code is tested out on a variety of molecules and clusters at the Hartree-Fock (HF)- and Møller-Plesset second order perturbation theory as well as density functional theory employing augmented Dunning basis sets. The results show remarkable accuracy and efficiency vis-à-vis the respective full calculations. Thus the present work forms an important step toward the development of an MTA-based black box code for implementation of HF as well as correlated quantum chemical calculations on large molecular systems.
Collapse
Affiliation(s)
- Subodh S Khire
- Interdisciplinary School of Scientific Computing, Savitribai Phule Pune University, Pune 411007, India
| | - Libero J Bartolotti
- Department of Physical and Computational Chemistry, East Carolina University, Greenville, North Carolina 27858, USA
| | - Shridhar R Gadre
- Interdisciplinary School of Scientific Computing, Savitribai Phule Pune University, Pune 411007, India
| |
Collapse
|
12
|
Thapa B, Beckett D, Jovan Jose KV, Raghavachari K. Assessment of Fragmentation Strategies for Large Proteins Using the Multilayer Molecules-in-Molecules Approach. J Chem Theory Comput 2018; 14:1383-1394. [DOI: 10.1021/acs.jctc.7b01198] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Bishnu Thapa
- Department of Chemistry, Indiana University, Bloomington 47405, Indiana, United States
| | - Daniel Beckett
- Department of Chemistry, Indiana University, Bloomington 47405, Indiana, United States
| | - K. V. Jovan Jose
- Department of Chemistry, Indiana University, Bloomington 47405, Indiana, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, Bloomington 47405, Indiana, United States
| |
Collapse
|
13
|
Singh G, Nandi A, Gadre SR, Chiba T, Fujii A. A combined theoretical and experimental study of phenol-(acetylene)n (n ≤ 7) clusters. J Chem Phys 2017; 146:154303. [DOI: 10.1063/1.4979953] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
14
|
Singh G, Verma R, Wagle S, Gadre SR. Explicit hydration of ammonium ion by correlated methods employing molecular tailoring approach. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1310326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Gurmeet Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India
| | - Rahul Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India
| | - Swapnil Wagle
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India
- Max Planck Institute of Colloids and Interfaces, Potsdam-Golm, Germany
| | - Shridhar R. Gadre
- Interdisciplinary School of Scientific Computing, Savitribai Phule Pune University, Pune, India
| |
Collapse
|
15
|
Sahu N, Gadre SR. Vibrational infrared and Raman spectra of polypeptides: Fragments-in-fragments within molecular tailoring approach. J Chem Phys 2017; 144:114113. [PMID: 27004868 DOI: 10.1063/1.4943966] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The present work reports the calculation of vibrational infrared (IR) and Raman spectra of large molecular systems employing molecular tailoring approach (MTA). Further, it extends the grafting procedure for the accurate evaluation of IR and Raman spectra of large molecular systems, employing a new methodology termed as Fragments-in-Fragments (FIF), within MTA. Unlike the previous MTA-based studies, the accurate estimation of the requisite molecular properties is achieved without performing any full calculations (FC). The basic idea of the grafting procedure is implemented by invoking the nearly basis-set-independent nature of the MTA-based error vis-à-vis the respective FCs. FIF has been tested out for the estimation of the above molecular properties for three isomers, viz., β-strand, 310- and α-helix of acetyl(alanine)nNH2 (n = 10, 15) polypeptides, three conformers of doubly protonated gramicidin S decapeptide and trpzip2 protein (PDB id: 1LE1), respectively, employing BP86/TZVP, M06/6-311G**, and M05-2X/6-31G** levels of theory. For most of the cases, a maximum difference of 3 cm(-1) is achieved between the grafted-MTA frequencies and the corresponding FC values. Further, a comparison of the BP86/TZVP level IR and Raman spectra of α-helical (alanine)20 and its N-deuterated derivative shows an excellent agreement with the existing experimental spectra. In view of the requirement of only MTA-based calculations and the ability of FIF to work at any level of theory, the current methodology provides a cost-effective solution for obtaining accurate spectra of large molecular systems.
Collapse
Affiliation(s)
- Nityananda Sahu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Shridhar R Gadre
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| |
Collapse
|
16
|
Saha A, Raghavachari K. Analysis of Different Fragmentation Strategies on a Variety of Large Peptides: Implementation of a Low Level of Theory in Fragment-Based Methods Can Be a Crucial Factor. J Chem Theory Comput 2016; 11:2012-23. [PMID: 26574406 DOI: 10.1021/ct501045s] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We have investigated the performance of two classes of fragmentation methods developed in our group (Molecules-in-Molecules (MIM) and Many-Overlapping-Body (MOB) expansion), to reproduce the unfragmented MP2 energies on a test set composed of 10 small to large biomolecules. They have also been assessed to recover the relative energies of different motifs of the acetyl(ala)18NH2 system. Performance of different bond-cutting environments and the use of Hartree-Fock and different density functionals (as a low level of theory) in conjunction with the fragmentation strategies have been analyzed. Our investigation shows that while a low level of theory (for recovering long-range interactions) may not be necessary for small peptides, it provides a very effective strategy to accurately reproduce the total and relative energies of larger peptides such as the different motifs of the acetyl(ala)18NH2 system. Employing M06-2X as the low level of theory, the calculated mean total energy deviation (maximum deviation) in the total MP2 energies for the 10 molecules in the test set at MIM(d=3.5Å), MIM(η=9), and MOB(d=5Å) are 1.16 (2.31), 0.72 (1.87), and 0.43 (2.02) kcal/mol, respectively. The excellent performance suggests that such fragment-based methods should be of general use for the computation of accurate energies of large biomolecular systems.
Collapse
Affiliation(s)
- Arjun Saha
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| |
Collapse
|
17
|
Nakata H, Nishimoto Y, Fedorov DG. Analytic second derivative of the energy for density-functional tight-binding combined with the fragment molecular orbital method. J Chem Phys 2016; 145:044113. [DOI: 10.1063/1.4959231] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Hiroya Nakata
- Department of Fundamental Technology Research, R and D Center Kagoshima, Kyocera, 1-4 Kokubu Yamashita-cho, Kirishima-shi, Kagoshima 899-4312, Japan
| | - Yoshio Nishimoto
- Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan
| | - Dmitri G. Fedorov
- Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
| |
Collapse
|
18
|
Sahu N, Gadre SR. Accurate vibrational spectra via molecular tailoring approach: a case study of water clusters at MP2 level. J Chem Phys 2016; 142:014107. [PMID: 25573553 DOI: 10.1063/1.4905004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In spite of the recent advents in parallel algorithms and computer hardware, high-level calculation of vibrational spectra of large molecules is still an uphill task. To overcome this, significant effort has been devoted to the development of new algorithms based on fragmentation methods. The present work provides the details of an efficient and accurate procedure for computing the vibrational spectra of large clusters employing molecular tailoring approach (MTA). The errors in the Hessian matrix elements and dipole derivatives arising due to the approximation nature of MTA are reduced by grafting the corrections from a smaller basis set. The algorithm has been tested out for obtaining vibrational spectra of neutral and charged water clusters at Møller-Plesset second order level of theory, and benchmarking them against the respective full calculation (FC) and/or experimental results. For (H2O)16 clusters, the estimated vibrational frequencies are found to differ by a maximum of 2 cm(-1) with reference to the corresponding FC values. Unlike the FC, the MTA-based calculations including grafting procedure can be performed on a limited hardware, yet take a fraction of the FC time. The present methodology, thus, opens a possibility of the accurate estimation of the vibrational spectra of large molecular systems, which is otherwise impossible or formidable.
Collapse
Affiliation(s)
- Nityananda Sahu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Shridhar R Gadre
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| |
Collapse
|
19
|
Singh G, Verma R, Gadre SR. Understanding Packing Patterns in Crystals by Analysis of Small Aggregates: A Case Study of CS2. J Phys Chem A 2015; 119:13055-63. [DOI: 10.1021/acs.jpca.5b08003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gurmeet Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Rahul Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Shridhar R. Gadre
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| |
Collapse
|
20
|
Sahu N, Gadre SR, Rakshit A, Bandyopadhyay P, Miliordos E, Xantheas SS. Low energy isomers of (H2O)25 from a hierarchical method based on Monte Carlo temperature basin paving and molecular tailoring approaches benchmarked by MP2 calculations. J Chem Phys 2015; 141:164304. [PMID: 25362296 DOI: 10.1063/1.4897535] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We report new global minimum candidate structures for the (H2O)25 cluster that are lower in energy than the ones reported previously and correspond to hydrogen bonded networks with 42 hydrogen bonds and an interior, fully coordinated water molecule. These were obtained as a result of a hierarchical approach based on initial Monte Carlo Temperature Basin Paving sampling of the cluster's Potential Energy Surface with the Effective Fragment Potential, subsequent geometry optimization using the Molecular Tailoring Approach with the fragments treated at the second order Møller-Plesset (MP2) perturbation (MTA-MP2) and final refinement of the entire cluster at the MP2 level of theory. The MTA-MP2 optimized cluster geometries, constructed from the fragments, were found to be within <0.5 kcal/mol from the minimum geometries obtained from the MP2 optimization of the entire (H2O)25 cluster. In addition, the grafting of the MTA-MP2 energies yields electronic energies that are within <0.3 kcal/mol from the MP2 energies of the entire cluster while preserving their energy rank order. Finally, the MTA-MP2 approach was found to reproduce the MP2 harmonic vibrational frequencies, constructed from the fragments, quite accurately when compared to the MP2 ones of the entire cluster in both the HOH bending and the OH stretching regions of the spectra.
Collapse
Affiliation(s)
- Nityananda Sahu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Shridhar R Gadre
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Avijit Rakshit
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Pradipta Bandyopadhyay
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Evangelos Miliordos
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MS K1-83, Richland, Washington 99352, USA
| | - Sotiris S Xantheas
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MS K1-83, Richland, Washington 99352, USA
| |
Collapse
|
21
|
Sahu N, Khire SS, Gadre SR. Structures, energetics and vibrational spectra of (H2O)32clusters: a journey from model potentials to correlated theory. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1062150] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
22
|
Nakata H, Fedorov DG, Nagata T, Kitaura K, Nakamura S. Simulations of Chemical Reactions with the Frozen Domain Formulation of the Fragment Molecular Orbital Method. J Chem Theory Comput 2015; 11:3053-64. [DOI: 10.1021/acs.jctc.5b00277] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroya Nakata
- Department
of Biomolecular Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
- Research
Cluster for Innovation, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Dmitri G. Fedorov
- Nanosystem
Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
| | - Takeshi Nagata
- Nanosystem
Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
- Graduate
School of System Informatics, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Kazuo Kitaura
- Graduate
School of System Informatics, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Shinichiro Nakamura
- Research
Cluster for Innovation, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| |
Collapse
|
23
|
Raghavachari K, Saha A. Accurate Composite and Fragment-Based Quantum Chemical Models for Large Molecules. Chem Rev 2015; 115:5643-77. [PMID: 25849163 DOI: 10.1021/cr500606e] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Krishnan Raghavachari
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Arjun Saha
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| |
Collapse
|
24
|
Analytic second derivative of the energy for density functional theory based on the three-body fragment molecular orbital method. J Chem Phys 2015; 142:124101. [DOI: 10.1063/1.4915068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
25
|
Jose KVJ, Raghavachari K. Evaluation of Energy Gradients and Infrared Vibrational Spectra through Molecules-in-Molecules Fragment-Based Approach. J Chem Theory Comput 2015; 11:950-61. [DOI: 10.1021/ct501026m] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. V. Jovan Jose
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
26
|
Nakata H, Fedorov DG, Yokojima S, Kitaura K, Nakamura S. Simulations of Raman Spectra Using the Fragment Molecular Orbital Method. J Chem Theory Comput 2014; 10:3689-98. [DOI: 10.1021/ct5003829] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroya Nakata
- Department
of Biomolecular Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
- Nakamura
Lab, Research Cluster for Innovation, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi,
Chiyoda-ku, Tokyo 102-0083, Japan
| | - Dmitri G. Fedorov
- NRI, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1
Umezono,Tsukuba, Ibaraki 305-8568, Japan
| | - Satoshi Yokojima
- Nakamura
Lab, Research Cluster for Innovation, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiouji-shi, Tokyo 192-0392, Japan
| | - Kazuo Kitaura
- Graduate
School of System Informatics, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501 Japan
| | - Shinichiro Nakamura
- Nakamura
Lab, Research Cluster for Innovation, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| |
Collapse
|
27
|
Richard RM, Lao KU, Herbert JM. Understanding the many-body expansion for large systems. I. Precision considerations. J Chem Phys 2014; 141:014108. [DOI: 10.1063/1.4885846] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ryan M. Richard
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Ka Un Lao
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - John M. Herbert
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| |
Collapse
|
28
|
Nakata H, Fedorov DG, Yokojima S, Kitaura K, Nakamura S. Efficient vibrational analysis for unrestricted Hartree–Fock based on the fragment molecular orbital method. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.04.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
29
|
Iwata S. Analysis of hydrogen bond energies and hydrogen bonded networks in water clusters (H2O)20 and (H2O)25 using the charge-transfer and dispersion terms. Phys Chem Chem Phys 2014; 16:11310-7. [DOI: 10.1039/c4cp01204f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The relationship of the charge-transfer and dispersion terms with the O–O length for every pair of hydrogen bonded water molecules in the isomers of (H2O)17–(H2O)21.
Collapse
Affiliation(s)
- Suehiro Iwata
- Department of Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522, Japan
| |
Collapse
|
30
|
Saha A, Raghavachari K. Dimers of Dimers (DOD): A New Fragment-Based Method Applied to Large Water Clusters. J Chem Theory Comput 2013; 10:58-67. [DOI: 10.1021/ct400472v] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arjun Saha
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
31
|
Howard JC, Tschumper GS. N-body:Many-body QM:QM vibrational frequencies: Application to small hydrogen-bonded clusters. J Chem Phys 2013; 139:184113. [DOI: 10.1063/1.4829463] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
32
|
Structural and spectroscopic studies of carbon dioxide clusters: a combined genetic algorithm and DFT based study. Struct Chem 2013. [DOI: 10.1007/s11224-013-0360-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
33
|
Sahu N, Singh G, Gadre SR. Exploring Structures and Energetics of Large OCS Clusters by Correlated Methods. J Phys Chem A 2013; 117:10964-72. [DOI: 10.1021/jp408311c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nityananda Sahu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016 India
| | - Gurmeet Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016 India
| | - Shridhar R. Gadre
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016 India
| |
Collapse
|
34
|
Howard JC, Tschumper GS. Wavefunction methods for the accurate characterization of water clusters. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2013. [DOI: 10.1002/wcms.1168] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Gregory S. Tschumper
- Department of Chemistry and Biochemistry University of Mississippi, University Mississippi USA
| |
Collapse
|
35
|
Sahu N, Yeole SD, Gadre SR. Appraisal of molecular tailoring approach for large clusters. J Chem Phys 2013; 138:104101. [PMID: 23514459 DOI: 10.1063/1.4793706] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
High level ab initio investigations on molecular clusters are generally restricted to those of small size essentially due to the nonlinear scaling of corresponding computational cost. Molecular tailoring approach (MTA) is a fragmentation-based method, which offers an economical and efficient route for studying larger clusters. However, due to its approximate nature, the MTA-energies carry some errors vis-à-vis their full calculation counterparts. These errors in the MTA-energies are reduced by grafting the correction at a lower basis set (e.g., 6-31+G(d)) onto a higher basis set (e.g., aug-cc-pvdz or aug-cc-pvtz) calculation at MP2 level of theory. Further, better estimates of energies are obtained by making use of many-body interaction analysis. For this purpose, R-goodness (Rg) parameters for the three- and four-body interactions in a fragmentation scheme are proposed. The procedure employing grafting and many-body analysis has been tested out on molecular clusters of water, benzene, acetylene and carbon dioxide. It is found that for the fragmentation scheme having higher three- and four-body Rg-values, the errors in MTA-grafted energies are reduced typically to ~0.2 mH at MP2 level calculation. Coupled with the advantage in terms of computational resources and CPU time, the present method opens a possibility of accurate treatment of large molecular clusters.
Collapse
|
36
|
Ramabhadran RO, Raghavachari K. Extrapolation to the Gold-Standard in Quantum Chemistry: Computationally Efficient and Accurate CCSD(T) Energies for Large Molecules Using an Automated Thermochemical Hierarchy. J Chem Theory Comput 2013; 9:3986-94. [PMID: 26592394 DOI: 10.1021/ct400465q] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The CCSD(T) method is known as the gold-standard in quantum chemistry and has been the method of choice in quantum chemistry for over 20 years to obtain accurate bond energies and molecular properties. Its computational cost formally scales as the seventh power of the size of the system and can be prohibitive for large molecules. As part of our efforts to reduce the computational cost of the CCSD(T) method yet retain its accuracy, we present a simple, efficient, and user-friendly protocol to extrapolate to CCSD(T) energies in conjunction with MP2 energies. The method is based on the automated error-canceling thermochemical hierarchy previously developed by us called the Connectivity-Based Hierarchy (CBH). For a test set containing 30 diverse nonaromatic organic molecules and biomonomers, we obtain highly accurate extrapolated CCSD(T) energies (with a mean absolute error of only 0.2-0.3 kcal/mol with different basis-set). Additionally, the work also features the successful extrapolation to CCSD energies using a similar protocol.
Collapse
Affiliation(s)
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| |
Collapse
|
37
|
Yeole SD, Sahu N, Gadre SR. High-Level ab Initio Investigations on Structures and Energetics of N2O Clusters. J Phys Chem A 2013; 117:8591-8. [DOI: 10.1021/jp402649y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sachin D. Yeole
- Department of Chemistry, Indian Institute of Technology, Kanpur,
Kanpur 208016, India
- Department of Chemistry, University of Pune, Pune 411007, India
| | - Nityananda Sahu
- Department of Chemistry, Indian Institute of Technology, Kanpur,
Kanpur 208016, India
| | - Shridhar R. Gadre
- Department of Chemistry, Indian Institute of Technology, Kanpur,
Kanpur 208016, India
| |
Collapse
|
38
|
Nakata H, Nagata T, Fedorov DG, Yokojima S, Kitaura K, Nakamura S. Analytic second derivatives of the energy in the fragment molecular orbital method. J Chem Phys 2013; 138:164103. [DOI: 10.1063/1.4800990] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
39
|
Isegawa M, Wang B, Truhlar DG. Electrostatically Embedded Molecular Tailoring Approach and Validation for Peptides. J Chem Theory Comput 2013; 9:1381-93. [DOI: 10.1021/ct300845q] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Miho Isegawa
- Department of Chemistry, Chemical Theory Center, and
Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota
55455-0431, United States
| | - Bo Wang
- Department of Chemistry, Chemical Theory Center, and
Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota
55455-0431, United States
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and
Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota
55455-0431, United States
| |
Collapse
|
40
|
Hua S, Li W, Li S. The Generalized Energy-Based Fragmentation Approach with an Improved Fragmentation Scheme: Benchmark Results and Illustrative Applications. Chemphyschem 2012; 14:108-15. [DOI: 10.1002/cphc.201200867] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Indexed: 11/09/2022]
|
41
|
Furtado JP, Rahalkar AP, Shanker S, Bandyopadhyay P, Gadre SR. Facilitating Minima Search for Large Water Clusters at the MP2 Level via Molecular Tailoring. J Phys Chem Lett 2012; 3:2253-2258. [PMID: 26295779 DOI: 10.1021/jz300663u] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Water clusters (H2O)20 and (H2O)25 are explored at the Møller-Plesset second-order perturbation (MP2) level of theory. Geometry optimization is carried out on favorable structures, initially generated by the temperature basin paving (TBP) method, utilizing the fragment-based molecular tailoring approach (MTA). MTA-based stabilization energies at the complete basis set limit are accurately estimated by grafting the energy correction using a smaller basis set. For prototypical cases, the minima are established via MTA-based vibrational frequency calculations at the MP2/aug-cc-pVDZ level. The potential of MTA in tackling large clusters is further demonstrated by performing geometry optimization at MP2/aug-cc-pVDZ starting with the global minimum of (H2O)30 reported by Monte Carlo (MC) and molecular dynamics (MD) investigations. The present study brings out the efficacy of MTA in performing computationally expensive ab initio calculations with minimal off-the-shelf hardware without significant loss of accuracy.
Collapse
Affiliation(s)
- Jonathan P Furtado
- †Department of Chemistry, Indian Institute of Technology, Kanpur - 208016, India
| | - Anuja P Rahalkar
- †Department of Chemistry, Indian Institute of Technology, Kanpur - 208016, India
| | - Sudhanshu Shanker
- ‡School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi - 110067, India
| | - Pradipta Bandyopadhyay
- ‡School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi - 110067, India
| | - Shridhar R Gadre
- †Department of Chemistry, Indian Institute of Technology, Kanpur - 208016, India
| |
Collapse
|
42
|
Richard RM, Herbert JM. A generalized many-body expansion and a unified view of fragment-based methods in electronic structure theory. J Chem Phys 2012; 137:064113. [DOI: 10.1063/1.4742816] [Citation(s) in RCA: 155] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
43
|
Mayhall NJ, Raghavachari K. Many-Overlapping-Body (MOB) Expansion: A Generalized Many Body Expansion for Nondisjoint Monomers in Molecular Fragmentation Calculations of Covalent Molecules. J Chem Theory Comput 2012; 8:2669-75. [DOI: 10.1021/ct300366e] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicholas J. Mayhall
- Department of Chemistry,
Indiana University, Bloomington,
Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry,
Indiana University, Bloomington,
Indiana 47405, United States
| |
Collapse
|
44
|
Guo W, Wu A, Zhang IY, Xu X. XO: An extended ONIOM method for accurate and efficient modeling of large systems. J Comput Chem 2012; 33:2142-60. [DOI: 10.1002/jcc.23051] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 06/04/2012] [Accepted: 06/05/2012] [Indexed: 11/10/2022]
|
45
|
Wu A, Xu X. DCMB that combines divide-and-conquer and mixed-basis set methods for accurate geometry optimizations, total energies, and vibrational frequencies of large molecules. J Comput Chem 2012; 33:1421-32. [DOI: 10.1002/jcc.22973] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Accepted: 03/02/2012] [Indexed: 11/06/2022]
|
46
|
|
47
|
|
48
|
Yeole SD, Sahu N, Gadre SR. Structures, energetics and vibrational spectra of CO2 clusters through molecular tailoring and cluster building algorithm. Phys Chem Chem Phys 2012; 14:7718-23. [DOI: 10.1039/c2cp23761j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
“Gold standard” coupled-cluster study of acetylene pentamers and hexamers via molecular tailoring approach. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-1029-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
50
|
Gordon MS, Fedorov DG, Pruitt SR, Slipchenko LV. Fragmentation Methods: A Route to Accurate Calculations on Large Systems. Chem Rev 2011; 112:632-72. [DOI: 10.1021/cr200093j] [Citation(s) in RCA: 836] [Impact Index Per Article: 64.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Mark S. Gordon
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames Iowa 50011, United States
| | - Dmitri G. Fedorov
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
| | - Spencer R. Pruitt
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames Iowa 50011, United States
| | - Lyudmila V. Slipchenko
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| |
Collapse
|