1
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Taniguchi T, Agbo DO. Vibrational circular dichroism spectroscopy in the C-D, XY, and XYZ stretching region. Phys Chem Chem Phys 2023; 25:28567-28575. [PMID: 37861094 DOI: 10.1039/d3cp04287a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Vibrational circular dichroism (VCD) spectroscopy is a powerful technique for structural analysis of chiral molecules, but information available from VCD spectra of large molecular systems can be limited by severe overlap of vibrational bands. While common chiral molecules do not absorb in the 1900-2400 cm-1 region, observation of VCD signals in this spectrally-isolated region is possible for molecules containing C-D, XY, and XYZ chromophores. Thus, a strategic introduction of these chromophores to a target molecule may produce VCD signals informative for molecular structures. VCD spectroscopy in the 1900-2400 cm-1 region is a rather unexplored research field and its basic properties remain to be investigated. This perspective article discusses insight obtained so far on the usefulness and physicochemical aspects of VCD spectroscopy in this region with briefly summarizing previous experimental VCD studies including classic examples as well as our recent results. We show that anharmonic effects such as overtones and combination bands often complicate VCD patterns. On the other hand, some molecules exhibit characteristic VCD signals that can be well interpreted by harmonic DFT spectral calculations for structural analysis. This article also discusses several examples of the use of this region for studying solute-solvent interactions and for VCD signal augmentation.
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Affiliation(s)
- Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, North 21 West 11, Sapporo 001-0021, Japan.
| | - Davidson Obinna Agbo
- Graduate School of Life Science, Hokkaido University, North 21 West 11, Sapporo 001-0021, Japan
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2
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Huang S, Deng H, Wei X, Zhang J. Progress in application of terahertz time-domain spectroscopy for pharmaceutical analyses. Front Bioeng Biotechnol 2023; 11:1219042. [PMID: 37533693 PMCID: PMC10393043 DOI: 10.3389/fbioe.2023.1219042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/12/2023] [Indexed: 08/04/2023] Open
Abstract
Terahertz time-domain spectroscopy is an analytical method using terahertz time-domain pulses to study the physical and chemical properties of substances. It has strong potential for application in pharmaceutical analyses as an original non-destructive, efficient and convenient technology for spectral detection. This review briefly introduces the working principle of terahertz time-domain spectroscopy technology, focuses on the research achievements of this technology in analyses of chemical drugs, traditional Chinese medicine and biological drugs in the past decade. We also reveal the scientific feasibility of practical application of terahertz time-domain spectroscopy for pharmaceutical detection. Finally, we discuss the problems in practical application of terahertz time-domain spectroscopy technology, and the prospect of further development of this technology in pharmaceutical analyses. We hope that this review can provide a reference for application of terahertz time-domain spectroscopy technology in pharmaceutical analyses in the future.
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Affiliation(s)
- Shuteng Huang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Hanxiu Deng
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Xia Wei
- Shandong Institute for Food and Drug Control, Jinan, China
| | - Jiayu Zhang
- School of Pharmacy, Binzhou Medical University, Yantai, China
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3
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Zubir MZM, Maulida NF, Abe Y, Nakamura Y, Abdelrasoul M, Taniguchi T, Monde K. Deuterium labelling to extract local stereochemical information by VCD spectroscopy in the C-D stretching region: a case study of sugars. Org Biomol Chem 2022; 20:1067-1072. [PMID: 35019932 DOI: 10.1039/d1ob02317a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stereochemical elucidation of molecules with multiple chiral centers is difficult. Even with VCD spectroscopy, excluding all but one diastereomeric structural candidate is challenging because the stereochemical inversion of one chiral center among many centers does not always result in noticeable differences in their VCD spectra. This work demonstrates that the introduction of a suitable VCD chromophore with absorption in the 2300-1900 cm-1 region can be used for extracting local stereochemical information and for the stereochemical assignment of the C-1 position of various sugars as a case study. Through studies on a series of epimeric pairs of monosaccharides and their derivatives, we found that the introduction of one -OCD3 group to each C-1 position produced almost mirror-image VCD patterns in the 2300-1900 cm-1 region depending on the C-1 stereochemistry irrespective of the other molecular moieties. This work also shows that comparison of the observed VCD signals and the calculated ones enables the stereochemical assignment of a chiral center in the vicinity of the chromophore. This study provides a proof of concept that the use of a VCD chromophore in the 2300-1900 cm-1 region enables the analysis of selected stereochemistry of suitable molecular systems. Further studies on this concept should lead to the development of a method useful for the structural elucidation of other types of complex molecules.
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Affiliation(s)
| | - Nurul Fajry Maulida
- Graduate School of Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan
| | - Yoshihiro Abe
- Graduate School of Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan
| | - Yuta Nakamura
- Graduate School of Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan
| | - Mariam Abdelrasoul
- Graduate School of Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan.,Department of Medicinal Chemistry, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan.
| | - Kenji Monde
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan.
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4
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Wang Z, Peng Y, Shi C, Wang L, Chen X, Wu W, Wu X, Zhu Y, Zhang J, Cheng G, Zhuang S. Qualitative and quantitative recognition of chiral drugs based on terahertz spectroscopy. Analyst 2021; 146:3888-3898. [PMID: 34042921 DOI: 10.1039/d1an00500f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral drugs are drugs with chiral or asymmetric centres in their molecular structure. Different enantiomers of the same chiral drug have noticeably different pharmacological activities and pharmacokinetic properties. However, its distinction has been perplexing scholars for many years in the qualitative and quantitative detection of antagonistic drugs. Conventional detection methods, such as polarimetry, circular dichroism, and high-performance liquid chromatography, are time consuming, cause sample loss and have cumbersome operations, and they can be applied only to the sampling method. In this paper, we propose a fast, accurate, qualitative and quantitative method for the study of chiral drugs based on linearly polarized terahertz (THz) spectroscopy and imaging technology. Taking ibuprofen as an example, based on the THz absorption spectra of the enantiomers RS-ibuprofen, (R)-(-)-ibuprofen, and (S)-(+)-ibuprofen, their characteristic peak frequencies, peak amplitude differences and peak area differences were extracted to qualitatively and quantitatively distinguish and identify the three substances. THz spectral imaging provides more intuitive results than those obtained from previous methods. In quantitative identification, the stability and detection accuracy of THz spectroscopy are much greater than those of Raman spectroscopy (88.8-99.8% vs. 21.42-94.62%, respectively). The qualitative recognition accuracy was 100%, and the quantitative recognition standard deviation was less than 0.01, and it is also a non-destructive testing method. Furthermore, the above method combined with principal component analysis (PCA) and the support vector machine (SVM) neural network classification algorithm was applied to the analysis of other chiral drugs. These results are significant for the rapid, accurate and non-destructive identification of chiral drugs.
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Affiliation(s)
- Zefang Wang
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Yan Peng
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Chengjun Shi
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Liping Wang
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Xiaohong Chen
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Wanwan Wu
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Xu Wu
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Yiming Zhu
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
| | - Jingchen Zhang
- Shanghai Center for Drug Evaluation and Inspection, P. R. China.
| | - Guiliang Cheng
- Shanghai Center for Drug Evaluation and Inspection, P. R. China.
| | - Songlin Zhuang
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab. of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, Shanghai, P. R. China.
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5
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Van de Vondel E, Herrebout W, Johannessen C. Tracking Conformational Changes in Phosvitin throughout a Crowding-Agent-Based Titration. Chembiochem 2019; 20:770-777. [PMID: 30451361 DOI: 10.1002/cbic.201800581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Indexed: 11/11/2022]
Abstract
The sensitivity of Raman optical activity (ROA) towards small conformational changes is explored by tracking the structural changes in an intrinsically disordered protein-phosvitin-induced by different concentrations of crowding agent. It is shown that ROA is capable of tracking small conformational changes involving β-sheet and α-helical secondary structural properties of the protein. Furthermore, it is indicated that the influences of the crowding agents employed, Ficoll 70 and dextran 70, on the structural properties of phosvitin differ significantly, with the structural changes induced by the presence of Ficoll 70 being more pronounced and already being visible at a lower concentration. The data also suggest that some spectral changes do not arise from a change in the secondary structure of the protein, but are related to differences in interaction between the phosphorylated residues of the protein and the sugar-based crowding agent.
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Affiliation(s)
- Evelien Van de Vondel
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Wouter Herrebout
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Christian Johannessen
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
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6
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Monaco G, Aquino F, Zanasi R, Herrebout W, Bultinck P, Massa A. Model-averaging of ab initio spectra for the absolute configuration assignment via vibrational circular dichroism. Phys Chem Chem Phys 2017; 19:28028-28036. [DOI: 10.1039/c7cp05358d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unescapable errors of calculations are taken into account through a model-averaging technique, opening the way to a quantitative comparison with experiment.
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Affiliation(s)
- Guglielmo Monaco
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | - Francesco Aquino
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | - Riccardo Zanasi
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | | | - Patrick Bultinck
- Department of Inorganic and Physical Chemistry
- Ghent University
- Belgium
| | - Antonio Massa
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
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7
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Krausbeck F, Autschbach J, Reiher M. Calculated Resonance Vibrational Raman Optical Activity Spectra of Naproxen and Ibuprofen. J Phys Chem A 2016; 120:9740-9748. [DOI: 10.1021/acs.jpca.6b09975] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florian Krausbeck
- ETH Zürich, Laboratorium für Physikalische
Chemie, Vladimir-Prelog-Weg
2, CH-8093 Zürich, Switzerland
| | - Jochen Autschbach
- Department
of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Markus Reiher
- ETH Zürich, Laboratorium für Physikalische
Chemie, Vladimir-Prelog-Weg
2, CH-8093 Zürich, Switzerland
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8
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Jiménez-Romero C, Rode JE, Rodríguez AD. Reassignment of the absolute configuration of plakinidone from the sponge consortium Plakortis halichondrioides-Xestospongia deweerdtae using a combination of synthesis and a chiroptical approach. TETRAHEDRON, ASYMMETRY 2016; 27:410-419. [PMID: 28190935 PMCID: PMC5295471 DOI: 10.1016/j.tetasy.2016.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Recent work by Wu et al. in connection with the first synthesis of the marine natural product plakinidone revealed that the most salient feature of its purported structure, a six-membered perlactone moiety, was in fact a five-membered lactone, i.e. a 3-methyl-4-hydroxy-2(5H)-furanone or tetronic acid ring. With the planar structure of plakinidone confidently revised, we undertook a new investigation to unambiguously establish its absolute configuration. Upon preparing two stable derivatives 1 and 5 from a sample of naturally occurring plakinidone extracted from the sponge association Plakortis halichondriodes-Xetospongia deweerdtae, the absolute configuration was assigned by synthesis and vibrational and electronic circular dichroism (VCD and ECD) measurements in combination with density functional theory calculations at the B3LYP/aug-cc-pVDZ/PCM(CH3CN) level of theory. Our combined efforts and the agreement between the experimental and calculated VCD/ECD spectra of 1 revealed that the absolute configuration of plakinidone was in fact (11S,17R) and not the formerly reported (11S,17S) diastereomer assigned by Wu et al.. Therefore, we propose that natural plakinidone is accurately represented by structure 12.
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Affiliation(s)
- Carlos Jiménez-Romero
- Molecular Sciences Research Center, University of Puerto Rico, 1390 Ponce de León Avenue, San Juan, Puerto Rico 00926
| | - Joanna E. Rode
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Abimael D. Rodríguez
- Molecular Sciences Research Center, University of Puerto Rico, 1390 Ponce de León Avenue, San Juan, Puerto Rico 00926
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9
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Mutter ST, Zielinski F, Popelier PLA, Blanch EW. Calculation of Raman optical activity spectra for vibrational analysis. Analyst 2015; 140:2944-56. [DOI: 10.1039/c4an02357a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review provides the necessary knowledge to accurately model ROA spectra of solvated systems and interpret their vibrational characteristics.
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Affiliation(s)
- Shaun T. Mutter
- Manchester Institute of Biotechnology and Faculty of Life Sciences
- University of Manchester
- Manchester
- UK
| | - François Zielinski
- Manchester Institute of Biotechnology and School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Paul L. A. Popelier
- Manchester Institute of Biotechnology and School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Ewan W. Blanch
- Manchester Institute of Biotechnology and Faculty of Life Sciences
- University of Manchester
- Manchester
- UK
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10
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De Gussem E, Herrebout W, Specklin S, Meyer C, Cossy J, Bultinck P. Strength by Joining Methods: Combining Synthesis with NMR, IR, and Vibrational Circular Dichroism Spectroscopy for the Determination of the Relative Configuration in Hemicalide. Chemistry 2014; 20:17385-94. [DOI: 10.1002/chem.201404822] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Indexed: 11/07/2022]
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11
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Polavarapu PL, Covington CL. Comparison of experimental and calculated chiroptical spectra for chiral molecular structure determination. Chirality 2014; 26:539-52. [PMID: 24644231 DOI: 10.1002/chir.22316] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/26/2014] [Accepted: 02/07/2014] [Indexed: 01/30/2023]
Abstract
For three different chiroptical spectroscopic methods, namely, vibrational circular dichroism (VCD), electronic circular dichroism (ECD), and Raman optical activity (ROA), the measures of similarity of the experimental spectra to the corresponding spectra predicted using quantum chemical theories are summarized. In determining the absolute configuration and/or predominant conformations of chiral molecules, these similarity measures provide numerical estimates of agreement between experimental observations and theoretical predictions. Selected applications illustrating the similarity measures for absorption, circular dichroism, and corresponding dissymmetry factor (DF) spectra, in the case of VCD and ECD, and for Raman, ROA, and circular intensity differential (CID) spectra in the case of ROA, are presented. The analysis of similarity in DF or CID spectra is considered to be much more discerning and accurate than that in absorption (or Raman) and circular dichroism (or ROA) spectra, undertaken individually.
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12
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Vandenbussche J, Bultinck P, Przybył AK, Herrebout WA. Statistical Validation of Absolute Configuration Assignment in Vibrational Optical Activity. J Chem Theory Comput 2013; 9:5504-12. [DOI: 10.1021/ct400843e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jelle Vandenbussche
- Department
of Inorganic and Physical Chemistry, Ghent University, Krijgslaan
281 (S3), 9000 Ghent, Belgium
| | - Patrick Bultinck
- Department
of Inorganic and Physical Chemistry, Ghent University, Krijgslaan
281 (S3), 9000 Ghent, Belgium
| | - Anna K. Przybył
- Faculty
of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland
| | - Wouter A. Herrebout
- Department
of Chemistry, University of Antwerp, Groenenborgerlaan 171 (G.V.023), 2020 Antwerp, Belgium
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13
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Kraka E, Freindorf M, Cremer D. Chiral discrimination by vibrational spectroscopy utilizing local modes. Chirality 2013; 25:185-96. [PMID: 23335376 DOI: 10.1002/chir.22130] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 10/12/2012] [Indexed: 12/28/2022]
Abstract
Chiral discrimination of homochiral and heterochiral H-bonded complexes is a challenge for both experimentalists and computational chemists. It is demonstrated that a two-pronged approach based on far-infrared vibrational spectroscopy and the calculation of local mode frequencies facilitates the chiral discrimination of H-bonded dimers. The local H-bond stretching frequencies identify the strongest H-bonds and by this the dominating chiral diastereomer. This is shown in the case of peroxide, trioxide, hydrazine, glycidol, and butan-2-ol dimers as well as propylene oxide···glycidol complexes investigated with the help of second-order Møller-Plesset perturbation, coupled cluster, and density functional theory calculations where, in the latter case, the ωB97X-D functional was used for an improved description of H-bonding. In some cases, additional intermolecular interactions overrule the important role of H-bonding, which is found by calculating chirodiastaltic energies.
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Affiliation(s)
- Elfi Kraka
- Computational and Theoretical Chemistry Group, Department of Chemistry, Southern Methodist University, 3215 Daniel Ave., Dallas, TX 75275-03114, USA.
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