1
|
Dobšíková K, Taušová T, Fagan P, Paškanová N, Kuchař M, Čejka J, Setnička V. Solid-state vibrational circular dichroism: Methodology and application for amphetamine derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123486. [PMID: 37820493 DOI: 10.1016/j.saa.2023.123486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/22/2023] [Accepted: 10/01/2023] [Indexed: 10/13/2023]
Abstract
Amphetamine derivatives are considered most seized substances worldwide. In this study, solid-state vibrational circular dichroism (VCD) measurements of enantiomerically pure substances were performed for spectroscopic discrimination between (S)- and (R)-enantiomers. First, we have developed a universal experimental approach to obtain reliable and reproducible solid-state VCD spectra. First, the samples were prepared as pellets composed of mixtures of camphor as a model compound and a crystalline matrix powder. In order to obtain the best results without artifacts and with a maximum signal-to-noise ratio, the following experimental conditions were optimized: pellet thickness and diameter and sample rotation speed. The optimized parameters were then used for the analysis of amphetamine and its derivatives (methamphetamine and 3,4-methylendioxymethamphetamine). Our high-quality spectra and results suggest that solid-state VCD spectroscopy represents a cost-effective and easy-to-use method for the analysis of conformation changes and molecular packing in solid-state with potential applications in pharmaceutical and forensic practice.
Collapse
Affiliation(s)
- K Dobšíková
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - T Taušová
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - P Fagan
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - N Paškanová
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - M Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic; Psychedelic Research Centre, National Institute of Mental Health, Topolová 748, Klecany 250 67, Czech Republic
| | - J Čejka
- Department of Solid State Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - V Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic.
| |
Collapse
|
2
|
Wang Z, Duan S, Zhang R, Ma L, Lin K. Rapid chiral purity identification of mandelic acid by Raman spectra in the O-H stretching region. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123251. [PMID: 37591017 DOI: 10.1016/j.saa.2023.123251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 07/13/2023] [Accepted: 08/08/2023] [Indexed: 08/19/2023]
Abstract
Chiral molecules play a very important role in biological systems, and more and more chiral drugs are used in the treatment of diseases. Mandelic acid (MA) is an important chiral starting substance or the key intermediate of some chiral drugs, and the rapid detection of its chiral purity is very important in the synthesis, separation and detection of drugs. In this study, we developed a method for rapid determination of chiral purity of MA by Raman spectroscopy, and measured a series of Raman spectra of different chiral MA. Through the analysis, it is found that the OH stretching vibration peak can be used to identify the components of chiral molecules, and the enantiomeric excess (ee value) obtained is in good agreement with the real value, and the error is about 5%. The experimental detection speed is fast and the efficiency is high. Our work firstly provides a new idea for the purity detection of chiral molecules by the original Raman spectrum.
Collapse
Affiliation(s)
- Zhiqiang Wang
- School of Physics, Xidian University, Xi'an 710071, PR China
| | - Siqi Duan
- School of Physics, Xidian University, Xi'an 710071, PR China
| | - Ruiting Zhang
- School of Physics, Xidian University, Xi'an 710071, PR China
| | - Lin Ma
- School of Physics, Xidian University, Xi'an 710071, PR China
| | - Ke Lin
- School of Physics, Xidian University, Xi'an 710071, PR China; Interdisciplinary Research Center of Smart Sensor, Xidian University, Xi'an 710071, PR China.
| |
Collapse
|
3
|
Hermann DR, Ramer G, Riedlsperger L, Lendl B. Chiral Monitoring Across Both Enantiomeric Excess and Concentration Space: Leveraging Quantum Cascade Lasers for Sensitive Vibrational Circular Dichroism Spectroscopy. APPLIED SPECTROSCOPY 2023; 77:1362-1370. [PMID: 37847076 DOI: 10.1177/00037028231206186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Recently, high-throughput quantum cascade laser-based vibrational circular dichroism (QCL-VCD) technology has reduced the measurement time for high-quality vibrational circular dichroism spectra from hours to a few minutes. This study evaluates QCL-VCD for chiral monitoring using flow-through measurement of a changing sample in a circulating loop. A balanced detection QCL-VCD system was applied to the enantiomeric pair R/S-1,1'-bi-2-naphthol in solution. Different mixtures of the two components were used to simulate a racemization process, collecting spectral data at a time resolution of 6 min, and over three concentration levels. The goal of this experimental setup was to evaluate QCL-VCD in terms of both molar and enantiomeric excess (EE) sensitivity at a time resolution relevant to chiral monitoring in chemical processes. Subsequent chemometric evaluation by partial least squares regression revealed a cross-validated prediction accuracy of 2.8% EE with a robust prediction also for the test data set (error = 3.5% EE). In addition, the data set was also treated with the least absolute shrinkage and selection operator (LASSO), which also achieved a robust prediction. Due to the operating principle of LASSO, the obtained coefficients constituted a few discrete spectral frequencies, which represent the most variance. This information can be used in the future for dedicated QCL-based instrument design, gaining a higher time resolution without sacrificing predictive capabilities.
Collapse
Affiliation(s)
- Daniel-Ralph Hermann
- Research Division of Environmental Analytics, Process Analytics and Sensors, Institute of Chemical Technologies and Analytics, TU Wien, Vienna, Austria
| | - Georg Ramer
- Research Division of Environmental Analytics, Process Analytics and Sensors, Institute of Chemical Technologies and Analytics, TU Wien, Vienna, Austria
| | - Lisa Riedlsperger
- Research Division of Environmental Analytics, Process Analytics and Sensors, Institute of Chemical Technologies and Analytics, TU Wien, Vienna, Austria
| | - Bernhard Lendl
- Research Division of Environmental Analytics, Process Analytics and Sensors, Institute of Chemical Technologies and Analytics, TU Wien, Vienna, Austria
| |
Collapse
|
4
|
Dobšíková K, Spálovská D, Kuchař M, Paškanová N, Setnička V. Indazole-derived synthetic cannabinoids: Absolute configuration determination and structure characterization by circular dichroism and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122373. [PMID: 36657287 DOI: 10.1016/j.saa.2023.122373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/20/2022] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
An increasing number of products containing synthetic cannabinoids pose a growing crisis to public health worldwide. Recently, a rising number of cases of serious adverse health effects, intoxications, and death cases associated with synthetic cannabinoids were reported. The current study represents the comprehensive structural analysis of three new synthetic cannabinoids (AB-, ADB- and AMB-FUBINACA) in solution investigated by electronic and vibrational circular dichroism together with the conventional methods of infrared and ultraviolet absorption spectroscopy, all supported by the density functional theory (DFT) calculations. The best level of theory to reproduce the experimental wavenumbers and wavelengths was found to be the B3PW91 method with a 6-311++G(d,p) basis set including the implicit solvent effect simulation. Very good agreement between the experimental and simulated spectra allowed us to determine the absolute configuration and a detailed interpretation of the IR absorption, VCD, ECD and UV spectra of AB-, ADB- and AMB-FUBINACA. In addition, the HOMO and LUMO electronic transitions were calculated.
Collapse
Affiliation(s)
- K Dobšíková
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6, 166 28, Czech Republic.
| | - D Spálovská
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6, 166 28, Czech Republic
| | - M Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Technická 5, Prague 6, 166 28, Czech Republic; National Institute of Mental Health, Topolová 748, Klecany 250 67, Czech Republic
| | - N Paškanová
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Technická 5, Prague 6, 166 28, Czech Republic
| | - V Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6, 166 28, Czech Republic
| |
Collapse
|
5
|
Dobšíková K, Javorská Ž, Paškan M, Spálovská D, Trembulaková P, Herciková J, Kuchař M, Kozmík V, Kohout M, Setnička V. Enantioseparation and a comprehensive spectroscopic analysis of novel synthetic cathinones laterally substituted with a trifluoromethyl group. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122320. [PMID: 36634495 DOI: 10.1016/j.saa.2023.122320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/20/2022] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
Recently, the number of structural modifications of synthetic cathinones has been growing making them the second largest group of new psychoactive substances in Europe. Although they are abused because of their various psychoactive effects, some compounds from this group also serve as pharmaceuticals. Since synthetic cathinones are chiral molecules with one chiral center, their biological, toxicological, and pharmacological properties may significantly differ according to their absolute configuration and enantiomeric excess. In this study, we have synthesized two substances bearing a pharmacologically interesting trifluoromethyl group and developed a chiral liquid chromatography method using a polysaccharide chiral stationary phase to separate the corresponding enantiomers of both these drugs. Subsequently, we utilized molecular spectroscopic methods including chiroptical (electronic circular dichroism and vibrational circular dichroism) and non-polarizable (infrared and ultraviolet absorption) spectroscopies. In combination with density functional theory calculations, we have obtained stable conformers of selected enantiomers in solution and their relative abundances, which we used to simulate their spectra. The experimental and calculated data have been used to elucidate the 3D structure of the enantiomerically pure compounds and assign the absolute configuration of all prepared compounds.
Collapse
Affiliation(s)
- K Dobšíková
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - Ž Javorská
- Department of Organic Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - M Paškan
- Department of Organic Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - D Spálovská
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - P Trembulaková
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - J Herciková
- Department of Organic Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - M Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic; Psychedelic Research Centre, National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
| | - V Kozmík
- Department of Organic Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - M Kohout
- Department of Organic Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic
| | - V Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, Prague 6 166 28, Czech Republic.
| |
Collapse
|
6
|
Dobšíková K, Michal P, Spálovská D, Kuchař M, Paškanová N, Jurok R, Kapitán J, Setnička V. Conformational analysis of amphetamine and methamphetamine: a comprehensive approach by vibrational and chiroptical spectroscopy. Analyst 2023; 148:1337-1348. [PMID: 36857656 DOI: 10.1039/d2an02014a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
After cannabis, the most commonly used illicit substance worldwide is amphetamine and its derivatives, such as methamphetamine, with an ever-increasing number of synthetic modifications. Thus, fast and reliable methods are needed to identify them according to their spectral patterns and structures. Here, we have investigated the use of molecular spectroscopy methods to describe the 3D structures of these substances in a solution that models the physiological environment. The substances were analyzed by Raman and infrared (IR) absorption spectroscopy and by chiroptical methods, vibrational circular dichroism (VCD) and Raman optical activity (ROA). The obtained experimental data were supported by three different computational approaches based on density functional theory (DFT) and molecular dynamics (MD). Successful interpretation relies on good agreement between experimental and predicted spectra. The determination of the conformer populations of the studied molecules was based on maximizing the similarity overlap of weighted conformer spectra by a global minimization algorithm. Very good agreement was obtained between the experimental spectra and optimized-population weighted spectra from MD, providing a detailed insight into the structure of the molecules and their interaction with the solvent. The relative population of three amphetamine and six methamphetamine conformers was determined and is consistent with a previous NMR study. However, this work shows that only a few isolated conformers are not sufficient for the successful interpretation of the spectra, but the entire conformational space needs to be sampled appropriately and explicit interaction with the solvent needs to be included.
Collapse
Affiliation(s)
- Kristýna Dobšíková
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.
| | - Pavel Michal
- Department of Optics, Palacký University Olomouc, Olomouc, 771 46, Czech Republic.
| | - Dita Spálovská
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,National Institute of Mental Health, Klecany 250 67, Czech Republic
| | - Natalie Paškanová
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
| | - Radek Jurok
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.,Department of Organic Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
| | - Josef Kapitán
- Department of Optics, Palacký University Olomouc, Olomouc, 771 46, Czech Republic.
| | - Vladimír Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic.
| |
Collapse
|
7
|
Paškan M, Rimpelová S, Svobodová Pavlíčková V, Spálovská D, Setnička V, Kuchař M, Kohout M. 4-Isobutylmethcathinone-A Novel Synthetic Cathinone with High In Vitro Cytotoxicity and Strong Receptor Binding Preference of Enantiomers. Pharmaceuticals (Basel) 2022; 15:ph15121495. [PMID: 36558946 PMCID: PMC9780888 DOI: 10.3390/ph15121495] [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: 10/21/2022] [Revised: 11/14/2022] [Accepted: 11/21/2022] [Indexed: 12/02/2022] Open
Abstract
New psychoactive substances and among them synthetic cathinones represent a significant threat to human health globally. However, within such a large pool of substances derived from a natural compound ((S)-cathinone), substances with important pharmaceutical uses can be identified, as already documented by bupropione. Therefore, this work aimed to find a synthetic pathway for a novel synthetic cathinone, namely 4-isobutylmethcathinone, and describe its spectroscopic properties and biological activity in vitro. Since cathinones comprise a chiral center in their structure, a method for chiral separation of the substance was elaborated using high-performance liquid chromatography on an analytical and preparative scale. Preparative enantioseparation on a polysaccharide column provided a sufficient amount of the drug for the chiroptical studies leading to the determination of the absolute configuration of enantiomers as well as for their subsequent in vitro cytotoxicity study. The cytotoxicity induced by 4-isobutylmethcathinone was determined in human cells derived from the urinary bladder (5637), neuroblastoma (SH-SY5Y), microglia (HMC-3), and hepatocellular carcinoma (Hep G2), in which the IC50 values after 72 h reached an 18-65 µM concentration. This is significantly higher cytotoxicity in comparison with other synthetic cathinones. In the receptor binding studies, a significant difference in the agonistic effect on dopamine and adrenergic receptors of individual enantiomers was observed. The lack of binding affinity towards the serotonin receptors then relates 4-isobutylmethcathinone to the family of monoamine drugs, such as 3,4-methylenedioxymathamphetamine (ecstasy, MDMA).
Collapse
Affiliation(s)
- Martin Paškan
- Department of Organic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Vladimíra Svobodová Pavlíčková
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Dita Spálovská
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Vladimír Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology, 166 28 Prague, Czech Republic
| | - Michal Kohout
- Department of Organic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
- Correspondence:
| |
Collapse
|
8
|
Fagan P, Spálovská D, Kuchař M, Černohorský T, Komorousová L, Kocourková L, Setnička V. Ecstasy tablets: Rapid identification and determination of enantiomeric excess of MDMA. Forensic Chem 2021. [DOI: 10.1016/j.forc.2021.100381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
9
|
Spálovská D, Paškan M, Jurásek B, Kuchař M, Kohout M, Setnička V. Structural spectroscopic study of enantiomerically pure synthetic cathinones and their major metabolites. NEW J CHEM 2021. [DOI: 10.1039/d0nj05065b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a chiral semipreparative methodology and a comprehensive spectroscopic structural study of three synthetic cathinones and their expected desmethyl metabolites.
Collapse
Affiliation(s)
- Dita Spálovská
- Department of Analytical Chemistry
- University of Chemistry and Technology
- Prague 6
- Czech Republic
| | - Martin Paškan
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague 6
- Czech Republic
| | - Bronislav Jurásek
- Forensic Laboratory of Biologically Active Substances
- Department of Chemistry of Natural Compounds
- University of Chemistry and Technology
- Prague 6
- Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances
- Department of Chemistry of Natural Compounds
- University of Chemistry and Technology
- Prague 6
- Czech Republic
| | - Michal Kohout
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague 6
- Czech Republic
| | - Vladimír Setnička
- Department of Analytical Chemistry
- University of Chemistry and Technology
- Prague 6
- Czech Republic
| |
Collapse
|
10
|
Keiderling TA. Structure of Condensed Phase Peptides: Insights from Vibrational Circular Dichroism and Raman Optical Activity Techniques. Chem Rev 2020; 120:3381-3419. [DOI: 10.1021/acs.chemrev.9b00636] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Timothy A. Keiderling
- Department of Chemistry, University of Illinois at Chicago 845 West Taylor Street m/c 111, Chicago, Illinois 60607-7061, United States
| |
Collapse
|
11
|
Králík F, Fagan P, Kuchař M, Setnička V. Structure of heroin in a solution revealed by chiroptical spectroscopy. Chirality 2020; 32:854-865. [DOI: 10.1002/chir.23196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 12/30/2022]
Affiliation(s)
- František Králík
- Department of Analytical ChemistryUniversity of Chemistry and Technology Prague Czech Republic
| | - Patrik Fagan
- Department of Analytical ChemistryUniversity of Chemistry and Technology Prague Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances and Department of Chemistry of Natural CompoundsUniversity of Chemistry and Technology Prague Czech Republic
| | - Vladimír Setnička
- Department of Analytical ChemistryUniversity of Chemistry and Technology Prague Czech Republic
| |
Collapse
|
12
|
|
13
|
Van de Vondel E, Baatsen P, Van Elzen R, Lambeir AM, Keiderling TA, Herrebout WA, Johannessen C. Vibrational Circular Dichroism Sheds New Light on the Competitive Effects of Crowding and β-Synuclein on the Fibrillation Process of α-Synuclein. Biochemistry 2018; 57:5989-5995. [DOI: 10.1021/acs.biochem.8b00780] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Evelien Van de Vondel
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium
| | - Pieter Baatsen
- VIB & KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium
- VIB & KU Leuven BioImaging Core, 9052 Ghent, Belgium
| | - Roos Van Elzen
- Laboratory of Medical Biochemistry, Department of Pharmacy, University of Antwerp, 2610 Wilrijk, Belgium
| | - Anne-Marie Lambeir
- Laboratory of Medical Biochemistry, Department of Pharmacy, University of Antwerp, 2610 Wilrijk, Belgium
| | - Timothy A. Keiderling
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Wouter A. Herrebout
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium
| | - Christian Johannessen
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium
| |
Collapse
|
14
|
Instrumentation for Vibrational Circular Dichroism Spectroscopy: Method Comparison and Newer Developments. Molecules 2018; 23:molecules23092404. [PMID: 30235902 PMCID: PMC6225159 DOI: 10.3390/molecules23092404] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 08/25/2018] [Accepted: 09/07/2018] [Indexed: 01/10/2023] Open
Abstract
Vibrational circular dichroism (VCD) is a widely used standard method for determination of absolute stereochemistry, and somewhat less so for biomolecule characterization and following dynamic processes. Over the last few decades, different VCD instrument designs have developed for various purposes, and reliable commercial instrumentation is now available. This review will briefly survey historical and currently used instrument designs and describe some aspects of more recently reported developments. An important factor in applying VCD to conformational studies is theoretical modeling of spectra for various structures, techniques for which are briefly surveyed.
Collapse
|
15
|
Spálovská D, Králík F, Kohout M, Jurásek B, Habartová L, Kuchař M, Setnička V. Structure determination of butylone as a new psychoactive substance using chiroptical and vibrational spectroscopies. Chirality 2018; 30:548-559. [DOI: 10.1002/chir.22825] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/02/2018] [Accepted: 01/03/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Dita Spálovská
- Department of Analytical Chemistry; University of Chemistry and Technology; Prague 6 Czech Republic
| | - František Králík
- Department of Analytical Chemistry; University of Chemistry and Technology; Prague 6 Czech Republic
| | - Michal Kohout
- Department of Organic Chemistry; University of Chemistry and Technology; Prague 6 Czech Republic
| | - Bronislav Jurásek
- Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Prague 6 Czech Republic
- Department of Chemistry of Natural Compounds; University of Chemistry and Technology; Prague 6 Czech Republic
| | - Lucie Habartová
- Department of Analytical Chemistry; University of Chemistry and Technology; Prague 6 Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Prague 6 Czech Republic
- Department of Chemistry of Natural Compounds; University of Chemistry and Technology; Prague 6 Czech Republic
| | - Vladimír Setnička
- Department of Analytical Chemistry; University of Chemistry and Technology; Prague 6 Czech Republic
| |
Collapse
|
16
|
Králík F, Jirmásek P, Kuchař M, Setnička V. Chiroptical and vibrational spectroscopic study of genuine and counterfeit medicines containing tadalafil. Chirality 2018; 30:560-567. [PMID: 29419887 DOI: 10.1002/chir.22828] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 11/09/2022]
Abstract
The production and distribution of counterfeit pharmaceuticals present a serious problem worldwide. This is true especially in case of phosphodiesterase type 5 inhibitors for treating erectile dysfunction, where consumers often prefer buying them anonymously from unverified sources. In this study, genuine and counterfeit Cialis® 20 mg tablets were analyzed by electronic circular dichroism, vibrational circular dichroism, and infrared spectroscopy. The characteristic spectral patterns were identified by comparison with the spectra of tadalafil standard as an active pharmaceutical ingredient, and its presence was confirmed in all samples. The amount of tadalafil, however, was markedly lower in the case of counterfeit tablet as the observed band intensities were considerably lower. No other significant differences between the genuine and counterfeit tablets were revealed. Ab initio density functional theory calculations provided a detailed description of the stable conformers of tadalafil in a solution and enabled thorough interpretation of the experimental spectra.
Collapse
Affiliation(s)
- František Králík
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| | - Patrik Jirmásek
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague, Czech Republic.,Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague, Czech Republic
| | - Vladimír Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| |
Collapse
|
17
|
Keiderling TA, Lakhani A. Mini review: Instrumentation for vibrational circular dichroism spectroscopy, still a role for dispersive instruments. Chirality 2018; 30:238-253. [PMID: 29293282 DOI: 10.1002/chir.22799] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 11/07/2017] [Accepted: 11/16/2017] [Indexed: 01/30/2023]
Abstract
Vibrational circular dichroism (VCD) has become a standard method for determination of absolute stereochemistry, particularly now that reliable commercial instrumentation has become available. These instruments use a now well-documented Fourier transform infrared-based approach to measure VCD that has virtually displaced initial dispersive infrared-based designs. Nonetheless, many papers have appeared reporting dispersive VCD data, especially for biopolymers. Instrumentation designed with these original methods, particularly after more recent updates optimizing performance in selected spectral regions, has been shown still to have advantages for specific applications. This article presents a mini-review of dispersive VCD instrument designs and includes sample spectra obtained for various biopolymer (particularly peptide) samples. Complementary reviews of Fourier transform-VCD designs are broadly available.
Collapse
Affiliation(s)
- Timothy A Keiderling
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Ahmed Lakhani
- Department of Biophysical Chemistry and Mathematics, Calumet College of St. Joseph, Whiting, Indiana, USA
| |
Collapse
|
18
|
Fagan P, Kocourková L, Tatarkovič M, Králík F, Kuchař M, Setnička V, Bouř P. Cocaine Hydrochloride Structure in Solution Revealed by Three Chiroptical Methods. Chemphyschem 2017; 18:2258-2265. [DOI: 10.1002/cphc.201700452] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/31/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Patrik Fagan
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| | - Lucie Kocourková
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| | - Michal Tatarkovič
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| | - František Králík
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| | - Martin Kuchař
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| | - Vladimír Setnička
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences; Flemingovo náměstí 2 16610 Prague Czech Republic
- Departments of Analytical Chemistry and Chemistry of Natural Compounds and Forensic Laboratory of Biologically Active Substances; University of Chemistry and Technology; Technická 5 16628 Prague Czech Republic
| |
Collapse
|
19
|
Kocourková L, Novotná P, Čujová S, Čeřovský V, Urbanová M, Setnička V. Conformational study of melectin and antapin antimicrobial peptides in model membrane environments. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 170:247-255. [PMID: 27450123 DOI: 10.1016/j.saa.2016.07.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
Antimicrobial peptides have long been considered as promising compounds against drug-resistant pathogens. In this work, we studied the secondary structure of antimicrobial peptides melectin and antapin using electronic (ECD) and vibrational circular dichroism (VCD) spectroscopies that are sensitive to peptide secondary structures. The results from quantitative ECD spectral evaluation by Dichroweb and CDNN program and from the qualitative evaluation of the VCD spectra were compared. The antimicrobial activity of the selected peptides depends on their ability to adopt an amphipathic α-helical conformation on the surface of the bacterial membrane. Hence, solutions of different zwitterionic and negatively charged liposomes and micelles were used to mimic the eukaryotic and bacterial biological membranes. The results show a significant content of α-helical conformation in the solutions of negatively charged liposomes mimicking the bacterial membrane, thus correlating with the antimicrobial activity of the studied peptides. On the other hand in the solutions of zwitterionic liposomes used as models of the eukaryotic membranes, the fraction of α-helical conformation was lower, which corresponds with their moderate hemolytic activity.
Collapse
Affiliation(s)
- Lucie Kocourková
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Pavlína Novotná
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Sabína Čujová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Václav Čeřovský
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 166 10 Prague 6, Czech Republic
| | - Marie Urbanová
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Vladimír Setnička
- Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
| |
Collapse
|
20
|
Vibrational and electronic circular dichroism as powerful tools for the conformational analysis of cationic antimicrobial peptides. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1807-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
21
|
Zinna F, Pescitelli G. Towards the Limits of Vibrational Circular Dichroism Spectroscopy: VCD Spectra of Some Alkyl Vinylethers. Chirality 2015; 28:143-6. [DOI: 10.1002/chir.22555] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 10/23/2015] [Accepted: 10/28/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Francesco Zinna
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Pisa Italy
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Pisa Italy
| |
Collapse
|
22
|
The minimizing of fluorescence background in Raman optical activity and Raman spectra of human blood plasma. Anal Bioanal Chem 2014; 407:1335-42. [DOI: 10.1007/s00216-014-8358-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 10/29/2014] [Accepted: 11/19/2014] [Indexed: 01/12/2023]
|
23
|
Kuzma M, Václavík J, Novák P, Přech J, Januščák J, Červený J, Pecháček J, Šot P, Vilhanová B, Matoušek V, Goncharova II, Urbanová M, Kačer P. New insight into the role of a base in the mechanism of imine transfer hydrogenation on a Ru(II) half-sandwich complex. Dalton Trans 2013; 42:5174-82. [PMID: 23403772 DOI: 10.1039/c3dt32733g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Asymmetric transfer hydrogenation (ATH) of cyclic imines using [RuCl(η(6)-p-cymene)TsDPEN] (TsDPEN = N-tosyl-1,2-diphenylethylenediamine) was tested with various aliphatic (secondary, tertiary) and aromatic amines employed in the HCOOH-base hydrogen donor mixture. Significant differences in reaction rates and stereoselectivity were observed, which pointed to the fact that the role of the base in the overall mechanism could be more significant than generally accepted. The hydrogenation mixture was studied by nuclear magnetic resonance (NMR), Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and vibrational circular dichroism (VCD) with infrared spectroscopy. The results suggested that the protonated base formed an associate with the active ruthenium-hydride species, most probably via a hydrogen bond with the sulfonyl group of the complex. It is assumed that the steric and electronic differences among the bases were responsible for the results of the initial ATH experiments.
Collapse
Affiliation(s)
- Marek Kuzma
- Laboratory of Molecular Structure Characterization, Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague 4, Czech Republic.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Wu T, Zhang XP, You XZ. Stereo-chemical analysis of racemization of a chiral bipyridine. RSC Adv 2013. [DOI: 10.1039/c3ra45645e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
25
|
Moreno JRA, Huet TR, González JJL. Conformational relaxation of S-(+)-carvone and R-(+)-limonene studied by microwave Fourier transform spectroscopy and quantum chemical calculations. Struct Chem 2012. [DOI: 10.1007/s11224-012-0142-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
26
|
Wu T, You X. Exciton Coupling Analysis and Enolization Monitoring by Vibrational Circular Dichroism Spectra of Camphor Diketones. J Phys Chem A 2012; 116:8959-64. [DOI: 10.1021/jp3066212] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Wu
- State Key Laboratory of Coordination Chemistry, Nanjing
National Laboratory of Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, 210093
Nanjing, P. R. China
| | - Xiaozeng You
- State Key Laboratory of Coordination Chemistry, Nanjing
National Laboratory of Microstructures, School of Chemistry and Chemical
Engineering, Nanjing University, 210093
Nanjing, P. R. China
| |
Collapse
|
27
|
Setnička V, Hlaváček J, Urbanová M. Oligopeptide-porphyrin interactions studied by circular dichroism spectroscopy: the effect of metalloporphyrin axial ligands on peptide matrix conformation. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424608000650] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Vibrational (VCD) and electronic circular dichroism (ECD) spectroscopies were used to investigate non-covalent interactions between the cationic tripeptide L-lysyl-L-alanyl-L-alanine (KAA) and the anionic porphyrin meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) in aqueous solution. Also studied were the interactions between KAA and the three metal derivatives of TPPS (copper(II), iron(III), and manganese(III)), each of which has a different number of axial ligands. VCD spectra in the amide I' ( C = O stretching vibration) region are extremely sensitive to peptide conformation, and, consequently, provide direct information about the conformational changes of host oligopeptide matrices caused by electrostatic interaction with guest porphyrin molecules. We found that pure KAA adopts a left-handed polyproline II (PPII) helical conformation when dissolved in aqueous solution at near-neutral pH values. When mixed with metal-free TPPS under the same conditions, VCD intensities were markedly reduced in the amide I' region and a new negative band was observed at 1634 cm−1; both findings indicating the transition of the PPII conformation into a less compact structure having similarities to β-sheet, herein termed a β-sheet-like conformation. In the case of the metal derivatives of TPPS studied, only variations in the VCD intensities in the amide I' region were observed. Compared to the results for pure KAA, the binding of Cu (II) TPPS , which has no axial ligand, resulted in the greatest decrease in amide I' VCD intensity. Nevertheless, the shape of a VCD spectrum characteristic for a PPII conformation was maintained, thereby indicating the presence of an “extended” PPII conformation in the Cu (II) TPPS -KAA complex. Conversely, Mn (III) TPPS , which has two axial ligands, did not significantly affect the PPII conformation of KAA in the Mn (III) TPPS -KAA complex. The effects of the metalation and axial ligation of TPPS on the conformation of KAA in peptide-porphyrin complexes are discussed, together with the results of our ECD study.
Collapse
Affiliation(s)
- Vladimír Setnička
- Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, Prague 6, 166 28, Czech Republic
| | - Jan Hlaváček
- Department of Natural Products, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, Prague 6, 166 10, Czech Republic
| | - Marie Urbanová
- Department of Physics and Measurements, Institute of Chemical Technology, Technická 5, Prague 6, 166 28, Czech Republic
| |
Collapse
|
28
|
|
29
|
Merten C, Amkreutz M, Hartwig A. Determining the structure of α-phenylethyl isocyanide in chloroform by VCD spectroscopy and DFT calculations—simple case or challenge? Phys Chem Chem Phys 2010; 12:11635-41. [DOI: 10.1039/c004009f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
Merten C, Jalkanen KJ, Weiss VC, Hartwig A. Vibrational circular dichroism of 3-(trifluoroacetyl)-camphor and its interaction with chiral amines. Chirality 2010; 22:772-7. [DOI: 10.1002/chir.20832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
31
|
Julínek O, Krupička M, Lindner W, Urbanová M. Enantioselective interaction of carbamoylated quinine and (S)-3,5-dinitrobenzoyl alanine: theoretical and experimental circular dichroism study. Phys Chem Chem Phys 2010; 12:11487-97. [DOI: 10.1039/c000046a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
32
|
Julínek O, Setnička V, Miklášová N, Putala M, Ruud K, Urbanová M. Determination of Molecular Structure of Bisphenylene Homologues of BINOL-Based Phosphoramidites by Chiroptical Methods. J Phys Chem A 2009; 113:10717-25. [DOI: 10.1021/jp906724f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ondřej Julínek
- Department of Analytical Chemistry and Department of Physics and Measurements, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovak Republic, and Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Vladimír Setnička
- Department of Analytical Chemistry and Department of Physics and Measurements, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovak Republic, and Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Natalia Miklášová
- Department of Analytical Chemistry and Department of Physics and Measurements, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovak Republic, and Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Martin Putala
- Department of Analytical Chemistry and Department of Physics and Measurements, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovak Republic, and Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Kenneth Ruud
- Department of Analytical Chemistry and Department of Physics and Measurements, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovak Republic, and Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Marie Urbanová
- Department of Analytical Chemistry and Department of Physics and Measurements, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovak Republic, and Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| |
Collapse
|
33
|
Setnička V, Hlaváček J, Urbanová M. Cationic oligopeptides with the repeating sequence L-lysyl-L-alanyl-L-alanine: conformational and thermal stability study using optical spectroscopic methods. J Pept Sci 2009; 15:533-9. [DOI: 10.1002/psc.1154] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
34
|
Partal Ureña F, Moreno JRA, López González JJ. Conformational study of (R)-(+)-limonene in the liquid phase using vibrational spectroscopy (IR, Raman, and VCD) and DFT calculations. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.01.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
35
|
Enantioselective complexation of carbamoylated quinine and quinidine with N-blocked amino acids: vibrational and electronic circular dichroism study. Anal Bioanal Chem 2008; 393:303-12. [DOI: 10.1007/s00216-008-2323-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 07/26/2008] [Accepted: 07/28/2008] [Indexed: 10/21/2022]
|
36
|
Merten C, Kowalik T, Hartwig A. Vibrational circular dichroism spectroscopy of solid polymer films: effects of sample orientation. APPLIED SPECTROSCOPY 2008; 62:901-905. [PMID: 18702864 DOI: 10.1366/000370208785284394] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Vibrational circular dichroism (VCD) spectra of anisotropic thin solid samples are often superimposed with large contributions of linear birefringence and linear dichroism. In this study a theoretical approach is given on how to extract the true VCD spectrum out of such superimposed spectra. To verify this approach, the VCD spectra of achiral polymer films were examined. The polymers are supposed to give a zero line as VCD spectrum after eliminating the linear contributions. Applying our approach, in which four VCD spectra in different but selected sample orientations are recorded, and calculating their average, leads to the expected result, i.e., a zero line for achiral polymers. The advantage of this method for the elimination of artifacts from solid-state VCD spectra is that no further measurements are required (e.g., linear dichroism measurements or the determination of the orientation with the maximum anisotropy).
Collapse
Affiliation(s)
- Christian Merten
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung, Wiener Str. 12, Bremen, Germany.
| | | | | |
Collapse
|
37
|
Setnicka V, Nový J, Böhm S, Sreenivasachary N, Urbanová M, Volka K. Molecular structure of guanine-quartet supramolecular assemblies in a gel-state based on a DFT calculation of infrared and vibrational circular dichroism spectra. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:7520-7527. [PMID: 18553994 DOI: 10.1021/la800611h] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The infrared (IR) and vibrational circular dichroism (VCD) spectra of guanosine-5'-hydrazide ( G-1), a powerful hydrogelator, have been measured and analyzed on the basis of ab initio modeling. B3LYP/6-31G** DFT calculations predict that G-1, forming a clear solution in deuterated DMSO, is present in monomeric form in this solvent, whereas strong gelation in a phosphate buffer is due to the formation of a guanine-quartet structure, ( G-1)4, in which the four G-1 are linked by hydrogen-bonded guanine moieties and stabilized by an alkali metal cation. The B3LYP/6-31G** IR and VCD spectra of the nearly planar G-quartet, whose structure is slightly distorted from the C4h symmetry, in which the G-bases interact via four Hoogsteen-type hydrogen bonds and a sodium cation is positioned in the middle of the G-quartet, are in very good agreement with the experimental spectra, indicating that this structure is the predominant structure in the gel state. The geometric parameters are discussed. This study is the first to use IR and VCD spectroscopies coupled with DFT calculations to elucidate the structure of a supramolecular species in a gel state and shows the VCD spectroscopy as a powerful method for investigating the structure of complex supramolecular self-assemblies where the use of other structural methods is limited.
Collapse
Affiliation(s)
- Vladimír Setnicka
- Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic
| | | | | | | | | | | |
Collapse
|
38
|
Nový J, Böhm S, Králová J, Král V, Urbanová M. Formation and temperature stability of G-quadruplex structures studied by electronic and vibrational circular dichroism spectroscopy combined with ab initio calculations. Biopolymers 2008; 89:144-52. [PMID: 17960602 DOI: 10.1002/bip.20875] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Variations in the structure of d(GGGA)(5) oligonucleotide in the presence of Li(+), Na(+), and K(+) ions and its temperature stability were studied using electronic and vibrational circular dichroism, IR absorption, and ab initio calculations with the Becke 3-Lee-Yang-Parr functional at the 6-31G** level. The samples were characterized by nondenaturing gel electrophoresis. Oligonucleotide d(GGGA)(5) in the presence of Li(+) forms a nonplanar single tetramer, with angles of 102 degrees and 171 degrees between neighboring guanine bases. This tetramer changes its geometry at temperatures >50 degrees C, but does not form a quadruplex structure. In the presence of Na(+), the d(GGGA)(5) structure was optimized to almost planar tetramers with an angle of 177 degrees between neighboring guanines. The spectral results suggest that it stacks into a quadruplex helical structure. This quadruplex structure decayed to a single tetramer at temperatures >60 degrees C. The Hartree-Fock energies imply that d(GGGA)(5) prefers to form complexes with Na(+) rather than Li(+). The d(GGGA)(5) structure in the presence of monovalent ions is stabilized against thermal denaturation in the order Li(+) < Na(+) < K(+).
Collapse
Affiliation(s)
- Jakub Nový
- Department of Analytical Chemistry, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
| | | | | | | | | |
Collapse
|
39
|
Stephens PJ, Pan JJ, Devlin FJ, Urbanová M, Julínek O, Hájícek J. Determination of the absolute configurations of natural products via density functional theory calculations of vibrational circular dichroism, electronic circular dichroism, and optical rotation: The iso-schizozygane alkaloids isoschizogaline and isoschizogamine. Chirality 2008; 20:454-70. [PMID: 17853399 DOI: 10.1002/chir.20466] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The development of density functional theory (DFT) methods for the calculation of vibrational circular dichroism (VCD), electronic circular dichroism (ECD), and transparent spectral region optical rotation (OR) has revolutionized the determination of the absolute configurations (ACs) of chiral molecules using these chiroptical properties. We report the concerted application of DFT calculations of VCD, ECD, and OR to the determination of the ACs of the isoschizozygane alkaloid natural products, isoschizogaline, and isochizogamine, whose ACs have not previously been determined. The ACs of naturally occurring (-)-isoschizogaline and (-)-isoschizogamine, are both determined definitively to be 2R, 7R, 20S, 21S.
Collapse
Affiliation(s)
- Philip J Stephens
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA.
| | | | | | | | | | | |
Collapse
|
40
|
Michalski O, Kisiel W, Michalska K, Setnicka V, Urbanova M. Absolute configuration and conformational analysis of sesquiterpene lactone glycoside studied by vibrational circular dichroism spectroscopy. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2007.01.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
41
|
Bile pigment complexes with cyclodextrins: electronic and vibrational circular dichroism study. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.08.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
42
|
Nový J, Urbanová M. Vibrational and electronic circular dichroism study of the interactions of cationic porphyrins with (dG-dC)10 and (dA-dT)10. Biopolymers 2007; 85:349-58. [PMID: 17167793 DOI: 10.1002/bip.20654] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The interactions of two different porphyrins, without axial ligands-5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin-Cu(II) tetrachloride (Cu(II)TMPyP) and with bulky meso substituents-5,10,15,20-tetrakis(N,N,N-trimethylanilinium-4-yl)porphyrin tetrachloride (TMAP), with (dG-dC)10 and (dA-dT)10 were studied by combination of vibrational circular dichroism (VCD) and electronic circular dichroism (ECD) spectroscopy at different [oligonucleotide]/[porphyrin] ratios, where [oligonucleotide] and [porphyrin] are the concentrations of oligonucleotide per base-pair and porphyrin, respectively. The combination of VCD and ECD spectroscopy enables us to identify the types of interactions, and to specify the sites of interactions: The intercalative binding mode of Cu(II)TMPyP with (dG-dC)(10), which has been well described, was characterized by a new VCD "marker" and it was shown that the interaction of Cu(II)TMPyP with (dA-dT)10 via external binding to the phosphate backbone and major groove binding caused transition from the B to the non-B conformer. TMAP interacted with the major groove of (dG-dC)10, was semi-intercalated into (dA-dT)10, and caused significant variation in the structure of both oligonucleotides at the higher concentration of porphyrin. The spectroscopic techniques used in this study revealed that porphyrin binding with AT sequences caused substantial variation of the DNA structure. It was shown that VCD spectroscopy is an effective tool for the conformational studies of nucleic acid-porphyrin complexes in solution.
Collapse
Affiliation(s)
- Jakub Nový
- Department of Analytical Chemistry, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
| | | |
Collapse
|
43
|
Kuppens T, Vandyck K, van der Eycken J, Herrebout W, van der Veken B, Bultinck P. A DFT conformational analysis and VCD study on methyl tetrahydrofuran-2-carboxylate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 67:402-11. [PMID: 17045521 DOI: 10.1016/j.saa.2006.07.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Accepted: 07/23/2006] [Indexed: 05/12/2023]
Abstract
DFT calculations were performed on (S)-methyl tetrahydrofuran-2-carboxylate to facilitate the interpretation of IR and VCD spectra. The potential energy surface could not be described unambiguously using the 6-31G* basis set in combination with different density functionals including B1LYP, B3LYP, B3P86, B3PW91, B98, BHandH, BHandHLYP, MPW1PW91 and PBE1PBE. In contrast, a uniform conformational picture could be found using the cc-pVTZ basis set. Using this large basis set and the collection of nine functionals from above, the dipole and rotational strengths were calculated, and compared to experimental values which were extracted from the experimental IR and VCD spectra for (+)-(S)-methyl tetrahydrofuran-2-carboxylate. A detailed analysis on the agreement between experiment and simulated spectra was performed by assigning the experimental bands based on the harmonic fundamentals obtained for all functionals except BHandH, which performs badly over the whole line. Assessing the dipole strengths, all tested functionals perform equally well. For the rotational strengths, differences can be observed: B3LYP, B1LYP and B98 give the highest correlation with experiment, while PBE1PBE gives the lowest correlation. Comparable conclusions are obtained using a neighborhood similarity measure.
Collapse
Affiliation(s)
- Tom Kuppens
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281, S3, B-9000 Ghent, Belgium
| | | | | | | | | | | |
Collapse
|
44
|
Setnicka V, Urbanová M, Volka K, Nampally S, Lehn JM. Investigation of guanosine-quartet assemblies by vibrational and electronic circular dichroism spectroscopy, a novel approach for studying supramolecular entities. Chemistry 2007; 12:8735-43. [PMID: 16983706 DOI: 10.1002/chem.200500973] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The self-assembly of guanosine-5'-hydrazide G-1 in D(2)O, in the presence and absence of sodium cations, has been investigated by chiroptical techniques: electronic (ECD) and the newly introduced vibrational (VCD) circular dichroism spectroscopy. Using a combination of ECD and VCD with other methods such as IR, electron microscopy, and electrospray ionization mass spectrometry (ESI-MS) it was found that G-1 produces long-range chiral aggregates consisting of G-quartets, (G-1)(4), subsequently stacked into columns, [(G-1)(4)](n), induced by binding of metal cations between the (G-1)(4) species. This process, accompanied by gelation of the sample, is highly efficient in the presence of an excess of sodium cations, leading to aggregates with strong quartet-quartet interaction. Thermally induced conformational changes and conformational stability of guanosine-5'-hydrazide assemblies were studied by chiroptical techniques and the melting temperature of the hydrogels formed was obtained. The temperature-dependent experiments indicate that the long-range supramolecular aggregates are dissociated by increasing temperature into less ordered species, monomers, or other intermediates in equilibrium, as indicated by MS experiments.
Collapse
Affiliation(s)
- Vladimír Setnicka
- Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic.
| | | | | | | | | |
Collapse
|
45
|
Debie E, Kuppens T, Vandyck K, Van der Eycken J, Van Der Veken B, Herrebout W, Bultinck P. Vibrational circular dichroism DFT study on bicyclo[3.3.0]octane derivatives. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.11.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
46
|
Valík M, Malina J, Palivec L, Foltýnová J, Tkadlecová M, Urbanová M, Brabec V, Král V. Tröger's base scaffold in racemic and chiral fashion as a spacer for bisdistamycin formation. Synthesis and DNA binding study. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
47
|
Kuppens T, Herrebout W, van der Veken B, Bultinck P. Intermolecular Association of Tetrahydrofuran-2-carboxylic Acid in Solution: A Vibrational Circular Dichroism Study. J Phys Chem A 2006; 110:10191-200. [PMID: 16928107 DOI: 10.1021/jp0608980] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Carboxylic acids are known for their strong intermolecular associations. With chiral carboxylic acids, this behavior can be studied using vibrational circular dichroism (VCD). Tetrahydrofuran-2-carboxylic acid 1, a chiral building block for beta-lactam antibiotics, is studied by emphasizing the effect of the dimerization. Experimental results indicate that for solutions of 1 in CDCl3 and CS2, a complex equilibrium exists between the monomers and dimers. B3LYP/aug-cc-pVTZ calculations are performed on both monomer and dimer structures. To simulate IR and VCD spectra, populations for monomer and dimers were approximated using a semiquantitative model. A good agreement between experimental and simulated spectra is obtained by taking into account both the monomeric and the dimeric structures, weighted using the experimentally determined populations.
Collapse
Affiliation(s)
- Tom Kuppens
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | | | | | | |
Collapse
|
48
|
Hahn U, Kaufmann A, Nieger M, Julínek O, Urbanova M, Vögtle F. Preparation and Chiroptical Studies of Dendritic Alkaloid Derivatives. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500819] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
49
|
Kuppens T, Herrebout W, Van Der Veken B, Corens D, De Groot A, Doyon J, Van Lommen G, Bultinck P. Elucidation of the absolute configuration of JNJ-27553292, a CCR2 receptor antagonist, by vibrational circular dichroism analysis of two precursors. Chirality 2006; 18:609-20. [PMID: 16715516 DOI: 10.1002/chir.20297] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The absolute configurations of two precursors, that is, 1-(3',4'-dichlorophenyl)-propanol and 1-(3',4'-dichlorophenyl)-propanamine, of a potent 2-mercapto-imidazole CCR-2 receptor antagonist, JNJ-27553292, were determined using vibrational circular dichroism. As a consequence, the absolute configuration of the antagonist itself was also determined. The two precursor compounds were subjected to a thorough conformational analysis and rotational strengths were calculated at the B3LYP/cc-pVTZ level of theory. Based on these data, vibrational circular dichroism spectra were simulated, which in turn were compared with experimental spectra. Agreement between the spectra allowed the assignment of the absolute configuration, which is in agreement with the proposed configuration based on stereospecific reactions on similar compounds.
Collapse
Affiliation(s)
- Tom Kuppens
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 - S3, B-9000 Gent, Belgium
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Ryoo JJ, Jeon MK, Huh KS, Kim JA, Hwang JG, Mun GI, Oh HS. Monitoring of the Optical Purity for Dexibuprofen by HPLC. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2005. [DOI: 10.5012/jkcs.2005.49.3.283] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|