1
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Asiamah M, Raston PL. Laser Spectroscopy of Helium Solvated Clusters of Methanol and Methanol-Water in the Symmetric Methyl Stretching Band. J Phys Chem A 2023; 127:946-955. [PMID: 36668688 DOI: 10.1021/acs.jpca.2c08327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Mid-infrared spectra of methanol and methanol-water clusters have been investigated in the symmetric CD3 stretching band of CD3OH and CD3OD. We find that the position of this band provides a useful signature of the general type of hydrogen-bonded cluster it is associated with. Our results are consistent with those previously reported in the OH stretching region (Sulaiman, M. I.; Yang, S.; Ellis, A. M. J. Phys. Chem. A 2017, 121, 771-776) in that methanol clusters from the trimer to the pentamer are cyclic and that mixed clusters with one water molecule (and at least two methanol molecules) are also cyclic. We additionally provide evidence that the methanol trimer adopts a chair-like structure (as opposed to bowl-like), that mixed clusters with a larger number of water molecules are also cyclic, and that branched methanol clusters contribute to the depletion signal in larger methanol clusters. We performed double-hybrid DFT calculations which support these interpretations.
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Affiliation(s)
- Maameyaa Asiamah
- Department of Chemistry and Biochemistry, James Madison University, Harrisonburg, Virginia 22807, United States
| | - Paul L Raston
- Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia.,Department of Chemistry and Biochemistry, James Madison University, Harrisonburg, Virginia 22807, United States
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2
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Inakollu VSS, Yu H. Comparative studies of IR spectra of deprotonated serine with classical and thermostated ring polymer molecular dynamics simulations. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2021; 8:054101. [PMID: 34549074 PMCID: PMC8443303 DOI: 10.1063/4.0000124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
Here we report the vibrational spectra of deprotonated serine calculated from the classical molecular dynamics (MD) simulations and thermostated ring-polymer molecular dynamics (TRPMD) simulation with third-order density-functional tight-binding. In our earlier study [Inakollu and Yu, "A systematic benchmarking of computational vibrational spectroscopy with DFTB3: Normal mode analysis and fast Fourier transform dipole autocorrelation function," J. Comput. Chem. 39, 2067 (2018)] of deprotonated serine, we observed a significant difference in the vibrational spectra with the classical MD simulations compared to the infrared multiple photon dissociation spectra. It was postulated that this is due to neglecting the nuclear quantum effects (NQEs). In this work, NQEs are considered in spectral calculation using the TRPMD simulations. With the help of potential of mean force calculations, the conformational space of deprotonated serine is analyzed and used to understand the difference in the spectra of classical MD and TRPMD simulations at 298.15 and 100 K. The high-frequency vibrational bands in the spectra are characterized using Fourier transform localized vibrational mode (FT-νN AC) and interatomic distance histograms. At room temperature, the quantum effects are less significant, and the free energy profiles in the classical MD and the TRPMD simulations are very similar. However, the hydrogen bond between the hydroxyl-carboxyl bond is slightly stronger in TRPMD simulations. At 100 K, the quantum effects are more prominent, especially in the 2600-3600 cm-1, and the free energy profile slightly differs between the classical MD and TRPMD simulations. Using the FT-νN AC and the interatomic distance histograms, the high-frequency vibrational bands are discussed in detail.
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Affiliation(s)
| | - Haibo Yu
- Author to whom correspondence should be addressed:
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3
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Hsu PJ, Shinkai T, Tai PH, Fujii A, Kuo JL. Effects of mixing between short-chain and branched-chain alcohols in protonated clusters. Phys Chem Chem Phys 2020; 22:13223-13239. [PMID: 32500878 DOI: 10.1039/d0cp01116a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The previous analysis of the neat protonated branched-chain alcohol clusters revealed the impact of steric repulsion and dispersion of the bulky alkyl group on the hydrogen-bonded (H-bonded) structures and their temperature-dependence. To further understand the influence of the alkyl groups in H-bonded clusters, we studied the mixing of the two extremes of alcohols, methanol (MeOH) and tert-butyl alcohol (t-BuOH), with an excess proton. Infrared spectroscopy and a structural search of first principles calculations on the size-selected clusters H+(MeOH)m(t-BuOH)t (m + t = 4 and 5) were conducted. Temperature-dependence of the dominant H-bonded structures was explored by the Ar-tagging technique and quantum harmonic superposition approach. By introducing the dispersion-corrected density functional theory methods, it was shown that the effects of dispersion due to the bulky alkyl groups in the mixed clusters cannot be ignored for t≥ 2. The computational results qualitatively depicted the characteristics of the observed IR spectra, but overestimation of the temperature-dependence with dispersion correction was clearly seen due to the unbalanced correction between linear H-bonded structures and compact cyclic ones. These results demonstrate the importance of extensive investigation and benchmarks on different levels of theory, and that a properly sampled structure database is crucial to evaluate theoretical models.
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Affiliation(s)
- Po-Jen Hsu
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.
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4
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Li F, Wang Y, Men Z, Sun C. Exploring the hydrogen bond kinetics of methanol–water solutions using Raman scattering. Phys Chem Chem Phys 2020; 22:26000-26004. [DOI: 10.1039/d0cp04295a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Stimulated Raman scattering was used to clearly show the hydrogen bond kinetics of water–methanol mixed solutions.
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Affiliation(s)
- Fabing Li
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory
- College of Physics
- Jilin University
- Changchun 130012
- China
| | - Ying Wang
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory
- College of Physics
- Jilin University
- Changchun 130012
- China
| | - Zhiwei Men
- Coherent Light and Atomic and Molecular Spectroscopy Laboratory
- College of Physics
- Jilin University
- Changchun 130012
- China
| | - Chenglin Sun
- Key Laboratory of Physics and Technology for Advanced Batteries
- College of Physics
- Jilin University
- Changchun 130012
- China
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5
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Liu X, Zhang S, Ni H, Xiao W, Wang J, Li Y, Wu Y. Near infrared system coupled chemometric algorithms for the variable selection and prediction of baicalin in three different processes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 218:33-39. [PMID: 30954796 DOI: 10.1016/j.saa.2019.03.113] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/26/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
Characteristic variables are essential and necessary basis in model construction, and are related to the prediction result closely in near infrared spectroscopy (NIRS) analysis. However, the same compound usually has different characteristic variables for different analysis and it would be lower correlation between variables and structure in many researches. So, the accuracy and reliability are expected to improve by exploring characteristic variables in different spectrum analysis. In this study, competitive adaptive weighted resampling method (CARS) was applied to select characteristic variables related to baicalin from NIRS analysis data, which were applied to analysis of baicalin in three different processes including the herb, extraction process and concentration process of Scutellaria baicalensis. After application of CARS method, 70, 50 and 50 variables were selected respectively from three processes above. The selected variables were firstly analyzed by statistical methods that they were found to be consistent and correlated among three different processes after one-way analysis of variance test and Kendall's W. Partial least-squares (PLS) regression and extreme learning machine (ELM) models were constructed based on optimized data. Models after variable selection were less complicated and had better prediction results than global models. After comparison, CARS-PLS was suitable for the prediction of extraction process, while for the concentration process and herb, CARS-ELM performed better. The Rc value of the herb, extraction and concentration model were 0.9469, 0.9841 and 0.9675, respectively. The RSEP values were 4.54%, 6.96% and 8.37%, respectively. The results help to frame a theoretical basis for characteristic variables of baicalin.
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Affiliation(s)
- Xuesong Liu
- Institute of Modern Chinese Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Siyu Zhang
- Institute of Modern Chinese Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Hongfei Ni
- Institute of Modern Chinese Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Wei Xiao
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang 222001, PR China
| | - Jun Wang
- Suzhou ZeDaXingBang Pharmaceutical Co., Ltd., Suzhou 215000, PR China
| | - Yerui Li
- Suzhou ZeDaXingBang Pharmaceutical Co., Ltd., Suzhou 215000, PR China
| | - Yongjiang Wu
- Institute of Modern Chinese Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China.
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6
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Sugawara N, Hsu PJ, Fujii A, Kuo JL. Competition between hydrogen bonds and van der Waals forces in intermolecular structure formation of protonated branched-chain alcohol clusters. Phys Chem Chem Phys 2018; 20:25482-25494. [PMID: 30276413 DOI: 10.1039/c8cp05222k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To investigate the influence of bulky alkyl groups on hydrogen-bonded (H-bonded) network structures of alcohols, infrared (IR) spectra of protonated clusters of 2-propanol (2-PrOH) and tert-butyl alcohol (t-BuOH) were observed in the OH and CH stretch regions. In addition, by varying the tag species, the temperature dependence profile of the isomer population of H+(t-BuOH)n was revealed. An extensive search for stable isomers was performed using dispersion-corrected density functional theory methods, and temperature-dependent IR spectral simulations were done on the basis of the harmonic superposition approximation. The computational results qualitatively agreed with the observed size and temperature dependence of the H-bonded network structures of these protonated bulky alcohol clusters. However, the difficulty in the quantitative evaluation of dispersion was also demonstrated. It was shown that H+(2-PrOH)n (n = 4-7) have essentially the same network structures as the protonated normal alcohol clusters studied so far. On the other hand, H+(t-BuOH)n (n = 4-8) showed a clear preference for the smaller-membered ring structures, that is very different from the preference of the protonated normal alcohol clusters. The origin of the different structure preferences was discussed in terms of the steric effect and dispersion.
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Affiliation(s)
- Natsuko Sugawara
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
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7
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Inakollu VSS, Yu H. A systematic benchmarking of computational vibrational spectroscopy with DFTB3: Normal mode analysis and fast Fourier transform dipole autocorrelation function. J Comput Chem 2018; 39:2067-2078. [DOI: 10.1002/jcc.25390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 06/04/2018] [Accepted: 06/12/2018] [Indexed: 11/10/2022]
Affiliation(s)
- V. S. Sandeep Inakollu
- School of Chemistry and Molecular Bioscience University of Wollongong Wollongong New South Wales 2522 Australia
- Molecular Horizons University of Wollongong New South Wales 2522 Australia
| | - Haibo Yu
- School of Chemistry and Molecular Bioscience University of Wollongong Wollongong New South Wales 2522 Australia
- Molecular Horizons University of Wollongong New South Wales 2522 Australia
- Illawarra Health and Medical Research Institute Wollongong New South Wales 2522 Australia
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8
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Chou CP, Witek H, Irle S. When finite becomes infinite: convergence properties of vibrational spectra of oligomer chains. J Mol Model 2018; 24:288. [PMID: 30242484 DOI: 10.1007/s00894-018-3824-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 09/11/2018] [Indexed: 11/29/2022]
Abstract
We present a computational study of convergence properties of vibrational IR and Raman spectra for a series of increasingly long units of polyethylene, cis- and trans-polyacetylenes, and polyynes. Convergent behavior to the spectra of infinitely long polymers was observed in all cases when chains reached lengths of approximately 60 carbon atoms, both with respect to the positions of the bands and to their intensities. The vibrational spectra of longer chains are practically indistinguishable. The convergence rate depends on the degree of the π conjugation in a studied system: Vibrational spectra for oligoethylenes converge noticeably faster than the spectra for the conjugated systems. The slowest convergence is observed for skeletal motions of the oligomer chains, which may require more than a hundred carbon atoms in the chain to show deviations smaller than 1 cm-1 to the corresponding solid-state calculations. The results suggest that the boundary between the properties of finite and infinite molecular systems fades away for a surprisingly small number of atoms.
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Affiliation(s)
- Chien-Pin Chou
- Institute of Molecular Science and Department of Applied Chemistry, National Chiao Tung University, Hsinchu, 30010, Taiwan.,Waseda Research Institute for Science and Engineering (WISE), Waseda University, Tokyo, 169-8555, Japan
| | - Henryk Witek
- Institute of Molecular Science and Department of Applied Chemistry, National Chiao Tung University, Hsinchu, 30010, Taiwan. .,Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu, 30010, Taiwan.
| | - Stephan Irle
- Institute for Advanced Research and Department of Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan. .,Computational Sciences and Engineering Division & Chemical Sciences Division, ORNL, Oak Ridge, TN, USA.
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9
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Huang QR, Li YC, Ho KL, Kuo JL. Vibrational spectra of small methylamine clusters accessed by an ab initio anharmonic approach. Phys Chem Chem Phys 2018; 20:7653-7660. [DOI: 10.1039/c8cp00533h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Anharmonic vibrational calculations on Methylamine (MMA) clusters suggest that the origin of the complexity between 2800 and 3000 cm–1 is caused by Fermi resonance (FR) between the stretching and bending overtones of the CH3 group. In trimer and tetramer, FR also causes complex spectra pattern in the NH2 group.
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Affiliation(s)
- Qian-Rui Huang
- Institute of Atomic and Molecular Sciences
- Taipei 10617
- Taiwan
| | - Ying-Cheng Li
- Institute of Atomic and Molecular Sciences
- Taipei 10617
- Taiwan
| | - Kun-Lin Ho
- Institute of Atomic and Molecular Sciences
- Taipei 10617
- Taiwan
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences
- Taipei 10617
- Taiwan
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10
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Fujii A, Sugawara N, Hsu PJ, Shimamori T, Li YC, Hamashima T, Kuo JL. Hydrogen bond network structures of protonated short-chain alcohol clusters. Phys Chem Chem Phys 2018; 20:14971-14991. [DOI: 10.1039/c7cp08072g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Protonated alcohol clusters enable extraction of the physical essence of the nature of hydrogen bond networks.
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Affiliation(s)
- Asuka Fujii
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Natsuko Sugawara
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Po-Jen Hsu
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Takuto Shimamori
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Ying-Cheng Li
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Toru Hamashima
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
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11
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Mid-infrared and near-infrared spectroscopy for rapid detection of Gardeniae Fructus by a liquid-liquid extraction process. J Pharm Biomed Anal 2017. [DOI: 10.1016/j.jpba.2017.06.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Lee YF, Kelterer AM, Matisz G, Kunsági-Máté S, Chung CY, Lee YP. Infrared absorption of methanol-water clusters (CH 3OH) n(H 2O), n = 1-4, recorded with the VUV-ionization/IR-depletion technique. J Chem Phys 2017; 146:144308. [PMID: 28411595 DOI: 10.1063/1.4979558] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We recorded infrared (IR) spectra in the CH- and OH-stretching regions of size-selected clusters of methanol (M) with one water molecule (W), represented as MnW, n = 1-4, in a pulsed supersonic jet using the photoionization/IR-depletion technique. Vacuum ultraviolet emission at 118 nm served as the source of ionization in a time-of-flight mass spectrometer to detect clusters MnW as protonated forms Mn-1WH+. The variations in intensities of Mn-1WH+ were monitored as the wavelength of the IR laser light was tuned across the range 2700-3800 cm-1. IR spectra of size-selected clusters were obtained on processing of the observed action spectra of the related cluster-ions according to a mechanism that takes into account the production and loss of each cluster due to IR photodissociation. Spectra of methanol-water clusters in the OH region show significant variations as the number of methanol molecules increases, whereas those in the CH region are similar for all clusters. Scaled harmonic vibrational wavenumbers and relative IR intensities predicted with the M06-2X/aug-cc-pVTZ method for the methanol-water clusters are consistent with our experimental results. For dimers, absorption bands of a structure WM with H2O as a hydrogen-bond donor were observed at 3570, 3682, and 3722 cm-1, whereas weak bands of MW with methanol as a hydrogen-bond donor were observed at 3611 and 3753 cm-1. For M2W, the free OH band of H2O was observed at 3721 cm-1, whereas a broad feature was deconvoluted to three bands near 3425, 3472, and 3536 cm-1, corresponding to the three hydrogen-bonded OH-stretching modes in a cyclic structure. For M3W, the free OH shifted to 3715 cm-1, and the hydrogen-bonded OH-stretching bands became much broader, with a weak feature near 3179 cm-1 corresponding to the symmetric OH-stretching mode of a cyclic structure. For M4W, the observed spectrum agrees unsatisfactorily with predictions for the most stable cyclic structure, indicating significant contributions from branched isomers, which is distinctly different from M5 of which the cyclic form dominates.
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Affiliation(s)
- Yu-Fang Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Anne-Marie Kelterer
- Institute of Physical and Theoretical Chemistry, NAWI Graz, Graz University of Technology, Stremayrgasse 9/I, A-8010 Graz, Austria
| | - Gergely Matisz
- Department of General and Physical Chemistry, University of Pécs, Ifjúság 6, H-7624 Pécs, Hungary
| | - Sándor Kunsági-Máté
- Department of General and Physical Chemistry, University of Pécs, Ifjúság 6, H-7624 Pécs, Hungary
| | - Chao-Yu Chung
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
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13
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Sulaiman MI, Yang S, Ellis AM. Infrared Spectroscopy of Methanol and Methanol/Water Clusters in Helium Nanodroplets: The OH Stretching Region. J Phys Chem A 2017; 121:771-776. [DOI: 10.1021/acs.jpca.6b11170] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Media I. Sulaiman
- Department of Chemistry, University of Leicester, University Road, Leicester, LE1 7RH, U.K
| | - Shengfu Yang
- Department of Chemistry, University of Leicester, University Road, Leicester, LE1 7RH, U.K
| | - Andrew M. Ellis
- Department of Chemistry, University of Leicester, University Road, Leicester, LE1 7RH, U.K
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14
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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
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15
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Watanabe HC, Banno M, Sakurai M. An adaptive quantum mechanics/molecular mechanics method for the infrared spectrum of water: incorporation of the quantum effect between solute and solvent. Phys Chem Chem Phys 2016; 18:7318-33. [DOI: 10.1039/c5cp07136d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum effects in solute–solvent interactions, such as the many-body effect and the dipole-induced dipole, are known to be critical factors influencing the infrared spectra of species in the liquid phase.
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Affiliation(s)
- Hiroshi C. Watanabe
- Research Center for Advanced Science and Technology
- The University of Tokyo
- Meguro-ku
- Japan
| | - Misa Banno
- Center for Biological Resources and Informatics
- Tokyo Institute of Technology
- Midori-ku
- Japan
| | - Minoru Sakurai
- Center for Biological Resources and Informatics
- Tokyo Institute of Technology
- Midori-ku
- Japan
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16
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Chou CP, Nishimura Y, Fan CC, Mazur G, Irle S, Witek HA. Automatized Parameterization of DFTB Using Particle Swarm Optimization. J Chem Theory Comput 2015; 12:53-64. [DOI: 10.1021/acs.jctc.5b00673] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chien-Pin Chou
- Department
of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yoshifumi Nishimura
- Department
of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chin-Chai Fan
- Department
of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Grzegorz Mazur
- K. Gumiński
Department of Theoretical Chemistry, Jagiellonian University, Ingardena
3, 30-060 Cracow, Poland
| | | | - Henryk A. Witek
- Department
of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
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