1
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Rouquet E, Dupont J, Lepere V, Garcia GA, Nahon L, Zehnacker A. Conformer-Selective Photoelectron Circular Dichroism. Angew Chem Int Ed Engl 2024; 63:e202401423. [PMID: 38442011 DOI: 10.1002/anie.202401423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 03/07/2024]
Abstract
Conformational flexibility and chirality both play a key role in molecular recognition. It is therefore very useful to develop spectroscopic methods that simultaneously probe both properties. It has been theoretically predicted that photoelectron circular dichroism (PECD) should be very sensitive to conformational isomerism. However, experimental proof has been less forthcoming and only exists for a very few favorable cases. Here, we present a new PECD scheme based on resonance-enhanced two-photon ionization (RE2PI) using UV/Vis nanosecond laser excitations. The spectral resolution obtained thereby guarantees conformer-selectivity by inducing resonant conformer-specific ππ* S1←S0 transitions. We apply this experimental scheme to the study of chiral 1-indanol, which exists in two conformers linked by a ring inversion and defined by the position of the hydroxyl group, namely axial and equatorial. We show that the PECD of the equatorial and axial forms considerably differ in sign, magnitude and shape. We also discuss the influence of the total ionization energy, vibronic excitation of intermediate and final states, and relative polarization of the excitation and ionization lasers. Conformer-specificity adds a new dimension to the applications of PECD in analytical chemistry addressing now the general case of floppy systems.
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Affiliation(s)
- Etienne Rouquet
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192, Gif sur Yvette, France
| | - Jennifer Dupont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Valeria Lepere
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Gustavo A Garcia
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192, Gif sur Yvette, France
| | - Laurent Nahon
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192, Gif sur Yvette, France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
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2
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Ganjitabar H, Hadidi R, Garcia GA, Nahon L, Powis I. Analysis of the volatile monoterpene composition of citrus essential oils by photoelectron spectroscopy employing continuously monitored dynamic headspace sampling. Analyst 2023; 148:6228-6240. [PMID: 37987708 DOI: 10.1039/d3an01448g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
A new photoelectron spectroscopic method permitting a quantitative analysis of the volatile headspace of several essential oils is presented and discussed. In particular, we focus on the monoterpene compounds, which are known to be the dominant volatile components in many such oils. The photoelectron spectra of the monoterpene constituents may be effectively isolated by accepting for analysis only those electrons that accompany the production of m/z = 136 ions, and by using low photon energies that restrict cation fragmentation. The monoterpene isomers are then identified and quantified by regression modelling using a library of terpene standard spectra. An advantage of this approach is that pre-concentration of the volatile vapour is not required, and all steps are performed at ambient temperature, avoiding the possible deleterious effects (such as isomerisation/decomposition) that may sometimes arise in gas chromatographic (GC) procedures. As a proof-of-principle demonstration, three citrus oils (lemon, lime, bergamot) are analysed with this approach and the results are compared with reported GC composition profiles obtained for these oils. Potential advantages of the methodology that include multiplex detection and real-time, in situ analysis are identified and discussed. Alternative and faster experimental implementations concerning laboratory-based ionization and detection schemes are proposed and considered, as is the possibility of a straightforward extension towards simultaneous determination of enantiomeric excesses.
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Affiliation(s)
- Hassan Ganjitabar
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, UK.
| | - Rim Hadidi
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Gustavo A Garcia
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Laurent Nahon
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Ivan Powis
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, UK.
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3
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Yun EJ, Yu S, Kim DH, Park NJ, Liu JJ, Jin YS, Kim KH. Identification of the enantiomeric nature of 2-keto-3-deoxy-galactonate in the catabolic pathway of 3,6-anhydro-L-galactose. Appl Microbiol Biotechnol 2023; 107:7427-7438. [PMID: 37812254 DOI: 10.1007/s00253-023-12807-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 07/28/2023] [Accepted: 09/19/2023] [Indexed: 10/10/2023]
Abstract
A novel metabolic pathway of 3,6-anhydro-L-galactose (L-AHG), the main sugar component in red macroalgae, was first discovered in the marine bacterium Vibrio sp. EJY3. L-AHG is converted to 2-keto-3-deoxy-galactonate (KDGal) in two metabolic steps. Here, we identified the enantiomeric nature of KDGal in the L-AHG catabolic pathway via stereospecific enzymatic reactions accompanying the biosynthesis of enantiopure L-KDGal and D-KDGal. Enantiopure L-KDGal and D-KDGal were synthesized by enzymatic reactions derived from the fungal galacturonate and bacterial oxidative galactose pathways, respectively. KDGal, which is involved in the L-AHG pathway, was also prepared. The results obtained from the reactions with an L-KDGal aldolase, specifically acting on L-KDGal, showed that KDGal in the L-AHG pathway exists in an L-enantiomeric form. Notably, we demonstrated the utilization of L-KDGal by Escherichia coli for the first time. E. coli cannot utilize L-KDGal as the sole carbon source. However, when a mixture of L-KDGal and D-galacturonate was used, E. coli utilized both. Our study suggests a stereoselective method to determine the absolute configuration of a compound. In addition, our results can be used to explore the novel L-KDGal catabolic pathway in E. coli and to construct an engineered microbial platform that assimilates L-AHG or L-KDGal as substrates. KEY POINTS: • Stereospecific enzyme reactions were used to identify enantiomeric nature of KDGal • KDGal in the L-AHG catabolic pathway exists in an L-enantiomeric form • E. coli can utilize L-KDGal as a carbon source when supplied with D-galacturonate.
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Affiliation(s)
- Eun Ju Yun
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Sora Yu
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Dong Hyun Kim
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Na Jung Park
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Jing-Jing Liu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yong-Su Jin
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
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4
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Rouquet E, Roy Chowdhury M, Garcia GA, Nahon L, Dupont J, Lepère V, Le Barbu-Debus K, Zehnacker A. Induced photoelectron circular dichroism onto an achiral chromophore. Nat Commun 2023; 14:6290. [PMID: 37813848 PMCID: PMC10562374 DOI: 10.1038/s41467-023-42002-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/25/2023] [Indexed: 10/11/2023] Open
Abstract
An achiral chromophore can acquire a chiral spectroscopic signature when interacting with a chiral environment. This so-called induced chirality is documented in electronic or vibrational circular dichroism, which arises from the coupling between electric and magnetic transition dipoles. Here, we demonstrate that a chiroptical response is also induced within the electric dipole approximation by observing the asymmetric scattering of a photoelectron ejected from an achiral chromophore in interaction with a chiral host. In a phenol-methyloxirane complex, removing an electron from an achiral aromatic π orbital localised on the phenol moiety results in an intense and opposite photoelectron circular dichroism (PECD) for the two enantiomeric complexes with (R) and (S) methyloxirane, evidencing the long-range effect (~5 Å) of the scattering chiral potential. This induced chirality has important structural and analytical implications, discussed here in the context of growing interest in laser-based PECD, for in situ, real time enantiomer determination.
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Affiliation(s)
- Etienne Rouquet
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, F-91190, St Aubin, France
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | | | - Gustavo A Garcia
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, F-91190, St Aubin, France
| | - Laurent Nahon
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, F-91190, St Aubin, France.
| | - Jennifer Dupont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Valéria Lepère
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Katia Le Barbu-Debus
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405, Orsay, France.
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5
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Triptow J, Fielicke A, Meijer G, Green M. Imaging Photoelectron Circular Dichroism in the Detachment of Mass-Selected Chiral Anions. Angew Chem Int Ed Engl 2023; 62:e202212020. [PMID: 36201361 PMCID: PMC10099851 DOI: 10.1002/anie.202212020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Indexed: 12/05/2022]
Abstract
Photoelectron Circular Dichroism (PECD) is a forward-backward asymmetry in the photoemission from a non-racemic sample induced by circularly polarized light. PECD spectroscopy has potential analytical advantages for chiral discrimination over other chiroptical methods due to its increased sensitivity to the chiral potential of the molecule. The use of anions for PECD spectroscopy allows for mass-selectivity and provides a path to simple experimental schemes that employ table-top light sources. Evidence of PECD for anions is limited, and insight into the forces that govern PECD electron dynamics in photodetachment is absent. Here, we demonstrate a PECD effect in the photodetachment of mass-selected deprotonated 1-indanol anions. By utilizing velocity map imaging photoelectron spectroscopy with a tunable light source, we determine the energy-resolved PECD over a wide range of photon energies. The observed PECD reaches up to 11 %, similar to what has been measured for neutral species.
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Affiliation(s)
- Jenny Triptow
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - André Fielicke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Gerard Meijer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Mallory Green
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
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6
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Ayuso D, Ordonez AF, Smirnova O. Ultrafast chirality: the road to efficient chiral measurements. Phys Chem Chem Phys 2022; 24:26962-26991. [PMID: 36342056 PMCID: PMC9673685 DOI: 10.1039/d2cp01009g] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 07/20/2022] [Indexed: 08/20/2023]
Abstract
Today we are witnessing the electric-dipole revolution in chiral measurements. Here we reflect on its lessons and outcomes, such as the perspective on chiral measurements using the complementary principles of "chiral reagent" and "chiral observer", the hierarchy of scalar, vectorial and tensorial enantio-sensitive observables, the new properties of the chiro-optical response in the ultrafast and non-linear domains, and the geometrical magnetism associated with the chiral response in photoionization. The electric-dipole revolution is a landmark event. It has opened routes to extremely efficient enantio-discrimination with a family of new methods. These methods are governed by the same principles but work in vastly different regimes - from microwaves to optical light; they address all molecular degrees of freedom - electronic, vibrational and rotational, and use flexible detection schemes, i.e. detecting photons or electrons, making them applicable to different chiral phases, from gases to liquids to amorphous solids. The electric-dipole revolution has also enabled enantio-sensitive manipulation of chiral molecules with light. This manipulation includes exciting and controlling ultrafast helical currents in vibronic states of chiral molecules, enantio-sensitive control of populations in electronic, vibronic and rotational molecular states, and opens the way to efficient enantio-separation and enantio-sensitive trapping of chiral molecules. The word "perspective" has two meanings: an "outlook" and a "point of view". In this perspective article, we have tried to cover both meanings.
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Affiliation(s)
- David Ayuso
- Max-Born-Institut, 12489 Berlin, Germany
- Imperial College London, SW7 2AZ London, UK.
| | - Andres F Ordonez
- Max-Born-Institut, 12489 Berlin, Germany
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain.
| | - Olga Smirnova
- Max-Born-Institut, 12489 Berlin, Germany
- Technische Universität Berlin, 10623 Berlin, Germany.
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7
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Bolognesi P, Avaldi L. Photoelectron-photoion(s) coincidence studies of molecules of biological interest. Phys Chem Chem Phys 2022; 24:22356-22370. [PMID: 36124990 DOI: 10.1039/d2cp03079a] [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
Photoelectron-photoion(s) coincidence, PEPICO, experiments with synchrotron radiation have become one of the most powerful tools to investigate dissociative photoionization thanks to their selectivity. In this paper their application to the study of molecular species of biological interest in the gas phase is reviewed. Some applications of PEPICO to the study of potential radiosensitizers, amino acids and small peptides and opportunities offered by the advent of novel methods for the production of beams of these molecules are discussed.
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Affiliation(s)
- P Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 00015 Monterotondo Scalo, Italy.
| | - L Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 00015 Monterotondo Scalo, Italy.
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8
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Fehre K, Trinter F, Novikovskiy NM, Grundmann S, Tsitsonis D, Eckart S, Bauer L, Hilzinger M, Jahnke T, Dörner R, Demekhin PV, Schöffler MS. Influence of the emission site on the photoelectron circular dichroism in trifluoromethyloxirane. Phys Chem Chem Phys 2022; 24:13597-13604. [PMID: 35621377 DOI: 10.1039/d2cp00143h] [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
We report a joint experimental and theoretical study of the differential photoelectron circular dichroism (PECD) in inner-shell photoionization of uniaxially oriented trifluoromethyloxirane. By adjusting the photon energy of the circularly polarized synchrotron radiation, we address 1s-photoionization of the oxygen, different carbon, and all fluorine atoms. The photon energies were chosen such that in all cases electrons with a similar kinetic energy of about 11 eV are emitted. Employing coincident detection of electrons and fragment ions, we concentrate on identical molecular fragmentation channels for all of the electron-emitter scenarios. Thereby, we systematically examine the influence of the emission site of the photoelectron wave on the differential PECD. We observe large differences in the PECD signals. The present experimental results are supported by corresponding relaxed-core Hartree-Fock calculations.
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Affiliation(s)
- Kilian Fehre
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Florian Trinter
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany. .,Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Nikolay M Novikovskiy
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany. .,Institute of Physics, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Sven Grundmann
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Dimitrios Tsitsonis
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Sebastian Eckart
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Leonie Bauer
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Maria Hilzinger
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Till Jahnke
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Reinhard Dörner
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
| | - Philipp V Demekhin
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| | - Markus S Schöffler
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany.
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9
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Signorell R, Winter B. Photoionization of the aqueous phase: clusters, droplets and liquid jets. Phys Chem Chem Phys 2022; 24:13438-13460. [PMID: 35510623 PMCID: PMC9176186 DOI: 10.1039/d2cp00164k] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 04/11/2022] [Indexed: 12/03/2022]
Abstract
This perspective article reviews specific challenges associated with photoemission spectroscopy of bulk liquid water, aqueous solutions, water droplets and water clusters. The main focus lies on retrieving accurate energetics and photoelectron angular information from measured photoemission spectra, and on the question how these quantities differ in different aqueous environments. Measured photoelectron band shapes, vertical binding energies (ionization energies), and photoelectron angular distributions are influenced by various phenomena. We discuss the influences of multiple energy-dependent electron scattering in aqueous environments, and we discuss different energy referencing methods, including the application of a bias voltage to access absolute energetics of solvent and solute. Recommendations how to account for or minimize the influence of electron scattering are provided. The example of the hydrated electron in different aqueous environments illustrates how one can account for electron scattering, while reliable methods addressing parasitic potentials and proper energy referencing are demonstrated for ionization from the outermost valence orbital of neat liquid water.
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Affiliation(s)
- Ruth Signorell
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland.
| | - Bernd Winter
- Molecular Physics Department, Fritz-Haber-Institute der Max-Planck-Gesellschaft, Faradayweg 4-6, 14196 Berlin, Germany.
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10
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Dupont J, Lepère V, Zehnacker A, Hartweg S, Garcia GA, Nahon L. Photoelectron Circular Dichroism as a Signature of Subtle Conformational Changes: The Case of Ring Inversion in 1-Indanol. J Phys Chem Lett 2022; 13:2313-2320. [PMID: 35245057 DOI: 10.1021/acs.jpclett.2c00074] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chirality plays a fundamental role in the molecular recognition processes. Molecular flexibility is also crucial in molecular recognition, allowing the interacting molecules to adjust their structures and hence optimize the interaction. Methods probing simultaneously chirality and molecular conformation are therefore crucially needed. Taking advantage of a possible control in the gas phase of the conformational distribution between the equatorial and axial conformers resulting from a ring inversion in jet-cooled 1-indanol, we demonstrate here the sensitivity of valence-shell photoelectron circular dichroism (PECD) to both chirality and subtle conformational changes, in a case where the photoelectron spectra of the two conformers are identical. For the highest occupied orbital, we observe a dramatic inversion of the PECD-induced photoelectron asymmetries, while the photoionization cross-section and usual anisotropy (β) parameter are completely insensitive to conformational isomerism. Such a sensitivity is a major asset for the ongoing developments of PECD-based techniques as a sensitive chiral (bio)chemical analytical tool in the gas phase.
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Affiliation(s)
- Jennifer Dupont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France
| | - Valéria Lepère
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France
| | - Anne Zehnacker
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Saclay, F-91405 Orsay, France
| | - Sebastian Hartweg
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France
| | - Gustavo A Garcia
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France
| | - Laurent Nahon
- Synchrotron Soleil, L'Orme des Merisiers, St. Aubin BP48, F-91192 Gif sur Yvette, France
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11
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Ranecky ST, Park GB, Samartzis PC, Giannakidis IC, Schwarzer D, Senftleben A, Baumert T, Schäfer T. Detecting chirality in mixtures using nanosecond photoelectron circular dichroism. Phys Chem Chem Phys 2022; 24:2758-2761. [PMID: 35044414 DOI: 10.1039/d1cp05468f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report chirality detection of structural isomers in a gas phase mixture using nanosecond photoelectron circular dichroism (PECD). Combining pulsed molecular beams with high-resolution resonance enhanced multi-photon ionization (REMPI) allows specific isolated transitions belonging to distinct components in the mixture to be targeted.
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Affiliation(s)
- Simon T Ranecky
- Universität Kassel, Heinrich-Plett-Str. 40, Kassel 34132, Germany
| | - G Barratt Park
- Georg-August-Universität Göttingen, Tammannstr. 6, Göttingen 37077, Germany. .,Max Planck Institut für Biophysikalische Chemie, Am Fassberg 11, Göttingen 37077, Germany.,Department of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, TX 79409-1061, USA
| | - Peter C Samartzis
- Institute of Electronic Structure and Lasers, Foundation for Research and Technology - Hellas (FORTH), P. O. Box 1527, Heraklion 71110, Greece
| | - Ioannis C Giannakidis
- Institute of Electronic Structure and Lasers, Foundation for Research and Technology - Hellas (FORTH), P. O. Box 1527, Heraklion 71110, Greece.,Department of Materials Science and Technology, University of Crete, Heraklion 71003, Greece
| | - Dirk Schwarzer
- Max Planck Institut für Biophysikalische Chemie, Am Fassberg 11, Göttingen 37077, Germany
| | - Arne Senftleben
- Universität Kassel, Heinrich-Plett-Str. 40, Kassel 34132, Germany
| | - Thomas Baumert
- Universität Kassel, Heinrich-Plett-Str. 40, Kassel 34132, Germany
| | - Tim Schäfer
- Georg-August-Universität Göttingen, Tammannstr. 6, Göttingen 37077, Germany. .,Max Planck Institut für Biophysikalische Chemie, Am Fassberg 11, Göttingen 37077, Germany
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12
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Lehmann CS, Botros D, Weitzel KM. Coincident measurement of photo-ion circular dichroism and photo-electron circular dichroism on 1-Phenylethylamine. Phys Chem Chem Phys 2022; 24:15904-15911. [DOI: 10.1039/d2cp01418a] [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
Here we report the coincident measurement of the PICD and PECD effect in 1-Phenylethylamine upon multiphoton ionisation. Photo-ion circular dichroism (PICD) and photo-electron circular dichroism (PECD) are both methods to...
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13
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Catone D, Zema N, Prosperi T, Stener M, Decleva P, Nitti P, Turchini S. PECD study of a single conformer molecule: a critical comparison of experiment and theory. Phys Chem Chem Phys 2022; 24:4626-4634. [DOI: 10.1039/d1cp05416c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we address a specific experimental and theoretical quest on the influence of a conformational population in the modeling of PhotoElectron Circular Dichroism spectroscopy. In the last two...
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14
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Singh DP, Thompson JOF, Reid KL, Powis I. Influence of Vibrational Excitation and Nuclear Dynamics in Multiphoton Photoelectron Circular Dichroism of Fenchone. J Phys Chem Lett 2021; 12:11438-11443. [PMID: 34792356 DOI: 10.1021/acs.jpclett.1c03231] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We report photoelectron circular dichroism of S-(+)-fenchone enantiomers recorded with state-state vibrational level resolution using picosecond laser (2 + 1) resonance enhanced multiphoton ionization via 3s and 3p Rydberg intermediate states. The 3p state decays to the 3s state on a picosecond time scale so that, above the 3p Rydberg excitation threshold, ionization of vibrationally hot 3s states competes with direct 3p-1 ionization. Complex vibronic dynamics of the 3p → 3s internal conversion weaken the Rydberg Δv = 0 propensity rule in both the 3p-1 and 3s-1 ionization channels. Large variations of the forward-backward chiral asymmetry factors are observed between the Δv = 0 and Δv > 0 vibrational transitions, including dramatic swings from up to ±17%. Such changes of sign indicate complete reversal of the preferred direction for photoelectron emission in the laboratory frame, associated with vibrational motion. These asymmetry switches easily exceed the amplitude and frequency of such vibrationally induced flips previously observed in single photon ionization.
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Affiliation(s)
- Dhirendra P Singh
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - James O F Thompson
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Katharine L Reid
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Ivan Powis
- School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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15
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Blanchet V, Descamps D, Petit S, Mairesse Y, Pons B, Fabre B. Ultrafast relaxation investigated by photoelectron circular dichroism: an isomeric comparison of camphor and fenchone. Phys Chem Chem Phys 2021; 23:25612-25628. [PMID: 34781331 DOI: 10.1039/d1cp03569j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We study the isomeric effects using time resolved photoelectron circular dichroism (TR-PECD). Using a (1 + 1') pump-probe ionisation scheme with photoelectrons collected by the velocity map imaging technique, we compare the relaxation dynamics from the 3s-Rydberg state in 1R,4R-(+)-camphor with the one in its chiral isomer, 1R,4S-(-)-fenchone [Comby et al., 2016, JPCL, 7, 4514]. Our measurements revealed a similar lifetime for both isomers. However, the circular dichroism in the photoelectron angular distribution decays exponentially in ∼730 fs from a +9% forward amplitude during the first hundreds of femtoseconds to reach an asymptotic -2% backward amplitude. This time-scale is drastically shorter than in fenchone. Our analysis allows us to evaluate the impact of the anisotropy of excitation; the relaxation dynamics, following photoexcitation by the linearly polarized pump, is then compared to that induced by a circularly polarized pump pulse (CPL). With such a CPL pump, we then retrieve time constants of our chiral observables similar to the ones recorded in fenchone. Quantum and classical simulations are developed and used to decipher the dependence of the PECD on the anisotropy of excitation and the spatial distribution of the 3s-Rydberg electron wavefunction. Our experimental investigations, supported by our simulations, suggest that varying the pump ellipticity enables us to reveal the breakdown of the Franck-Condon approximation.
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Affiliation(s)
- Valérie Blanchet
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France.
| | - Dominique Descamps
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France.
| | - Stéphane Petit
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France.
| | - Yann Mairesse
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France.
| | - Bernard Pons
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France.
| | - Baptiste Fabre
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France.
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16
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Yoo IT, Eun HJ, Min A, Jeon CW, Jeong J, Heo J, Kim NJ. Ultraviolet photodissociation circular dichroism spectroscopy of protonated L-phenylalanyl-L-alanine in a cryogenic ion trap. Phys Chem Chem Phys 2021; 23:24180-24186. [PMID: 34676382 DOI: 10.1039/d1cp04030h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We obtained ultraviolet photodissociation (UVPD) circular dichroism (CD) spectra of protonated L-phenylalanyl-L-alanine (L-H+PheAla) near the origin band of the S0-S1 transition using cryogenic ion spectroscopy. Infrared (IR) ion-dip, IR-UV hole burning (HB) and UV-UV HB spectra showed that L-H+PheAla existed as two different conformers in a cryogenic ion trap, and they had nearly identical peptide backbones but different conformations in the Phe side chain. The UVPD CD spectra revealed that the two conformers had opposite CD signs and significantly different CD magnitudes from each other. These results demonstrate that the CD value of L-H+PheAla near the origin band is strongly influenced by the conformation of the Phe side chain.
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Affiliation(s)
- Il Tae Yoo
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea.
| | - Han Jun Eun
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea.
| | - Ahreum Min
- Department of Chemistry (BK21 +) and Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Korea
| | - Chang Wook Jeon
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea.
| | - Jinho Jeong
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea.
| | - Jiyoung Heo
- Department of Green Chemical Engineering, Sangmyung University, Chungnam 31066, Korea
| | - Nam Joon Kim
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea.
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17
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Hadidi R, Božanić, DK, Ganjitabar H, Garcia GA, Powis I, Nahon L. Conformer-dependent vacuum ultraviolet photodynamics and chiral asymmetries in pure enantiomers of gas phase proline. Commun Chem 2021; 4:72. [PMID: 36697576 PMCID: PMC9814706 DOI: 10.1038/s42004-021-00508-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 04/15/2021] [Indexed: 02/03/2023] Open
Abstract
Proline is a unique amino-acid, with a secondary amine fixed within a pyrrolidine ring providing specific structural properties to proline-rich biopolymers. Gas-phase proline possesses four main H-bond stabilized conformers differing by the ring puckering and carboxylic acid orientation. The latter defines two classes of conformation, whose large ionization energy difference allows a unique conformer-class tagging via electron spectroscopy. Photoelectron circular dichroism (PECD) is an intense chiroptical effect sensitive to molecular structures, hence theorized to be highly conformation-dependent. Here, we present experimental evidence of an intense and striking conformer-specific PECD, measured in the vacuum ultraviolet (VUV) photoionization of proline, as well as a conformer-dependent cation fragmentation behavior. This finding, combined with theoretical modeling, allows a refinement of the conformational landscape and energetic ordering, that proves inaccessible to current molecular electronic structure calculations. Additionally, astrochemical implications regarding a possible link of PECD to the origin of life's homochirality are considered in terms of plausible temperature constraints.
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Affiliation(s)
- Rim Hadidi
- grid.426328.9Synchrotron SOLEIL, l’Orme des Merisiers, Gif sur Yvette Cedex, France
| | - Dušan K. Božanić,
- grid.426328.9Synchrotron SOLEIL, l’Orme des Merisiers, Gif sur Yvette Cedex, France ,grid.7149.b0000 0001 2166 9385Present Address: Department of Radiation Chemistry and Physics, “VINČA” Institute of Nuclear Sciences—National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Hassan Ganjitabar
- grid.4563.40000 0004 1936 8868School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
| | - Gustavo A. Garcia
- grid.426328.9Synchrotron SOLEIL, l’Orme des Merisiers, Gif sur Yvette Cedex, France
| | - Ivan Powis
- grid.4563.40000 0004 1936 8868School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
| | - Laurent Nahon
- grid.426328.9Synchrotron SOLEIL, l’Orme des Merisiers, Gif sur Yvette Cedex, France
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18
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Kuhn LT, Motiram‐Corral K, Athersuch TJ, Parella T, Pérez‐Trujillo M. Simultaner enantiospezifischer Nachweis mehrerer Verbindungen in Mischungen mittels NMR‐Spektroskopie. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lars T. Kuhn
- Institut für Physikalische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg i. Br. Deutschland
| | - Kumar Motiram‐Corral
- Servei de Ressonància Magnètica Nuclear Facultat de Ciències i Biociències Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallès Katalonien Spanien
| | - Toby J. Athersuch
- Division of Systems Medicine Department of Metabolism, Digestion and Reproduction Imperial College London South Kensington London UK
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear Facultat de Ciències i Biociències Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallès Katalonien Spanien
| | - Míriam Pérez‐Trujillo
- Servei de Ressonància Magnètica Nuclear Facultat de Ciències i Biociències Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallès Katalonien Spanien
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19
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Kuhn LT, Motiram-Corral K, Athersuch TJ, Parella T, Pérez-Trujillo M. Simultaneous Enantiospecific Detection of Multiple Compounds in Mixtures using NMR Spectroscopy. Angew Chem Int Ed Engl 2020; 59:23615-23619. [PMID: 32959941 DOI: 10.1002/anie.202011727] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Indexed: 01/21/2023]
Abstract
Chirality plays a fundamental role in nature, but its detection and quantification still face many limitations. To date, the enantiospecific analysis of mixtures necessarily requires prior separation of the individual components. The simultaneous enantiospecific detection of multiple chiral molecules in a mixture represents a major challenge, which would lead to a significantly better understanding of the underlying biological processes; for example, via enantiospecifically analysing metabolites in their native environment. Here, we report on the first in situ enantiospecific detection of a thirty-nine-component mixture. As a proof of concept, eighteen essential amino acids at physiological concentrations were simultaneously enantiospecifically detected using NMR spectroscopy and a chiral solvating agent. This work represents a first step towards the simultaneous multicomponent enantiospecific analysis of complex mixtures, a capability that will have substantial impact on metabolism studies, metabolic phenotyping, chemical reaction monitoring, and many other fields where complex mixtures containing chiral molecules require efficient characterisation.
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Affiliation(s)
- Lars T Kuhn
- Institut für Physikalische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg i. Br., Germany
| | - Kumar Motiram-Corral
- Servei de Ressonància Magnètica Nuclear, Facultat de Ciències i Biociències, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Toby J Athersuch
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College London, South Kensington, London, UK
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear, Facultat de Ciències i Biociències, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Míriam Pérez-Trujillo
- Servei de Ressonància Magnètica Nuclear, Facultat de Ciències i Biociències, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
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20
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Ganjitabar H, Singh DP, Chapman R, Gardner A, Minns RS, Powis I, Reid KL, Vredenborg A. The role of the intermediate state in angle-resolved photoelectron studies using (2 + 1) resonance-enhanced multiphoton ionization of the chiral terpenes, α-pinene and 3-carene. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1808907] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Hassan Ganjitabar
- School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
| | - Dhirendra P. Singh
- School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
| | - Richard Chapman
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxfordshire, UK
| | - Adrian Gardner
- School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
- Stephenson Institute for Renewable Energy and the Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Russell S. Minns
- School of Chemistry, University of Southampton, Highfield, Southampton, UK
| | - Ivan Powis
- School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
| | - Katharine L. Reid
- School of Chemistry, The University of Nottingham, University Park, Nottingham, UK
| | - Arno Vredenborg
- Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
- MassSpecpecD BV, Enschede, The Netherlands
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21
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Bégin JL, Alsaawy M, Bhardwaj R. Chiral discrimination by recollision enhanced femtosecond laser mass spectrometry. Sci Rep 2020; 10:14074. [PMID: 32826912 PMCID: PMC7442795 DOI: 10.1038/s41598-020-71069-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 08/05/2020] [Indexed: 11/09/2022] Open
Abstract
Chiral molecules and their interactions are critical in a variety of chemical and biological processes. Circular dichroism (CD) is the most widely used optical technique to study chirality, often performed in a solution phase. However, CD has low-efficiency on the order of 0.01-1[Formula: see text]. Therefore, there is a growing need to develop high-efficiency chiroptical techniques, especially in gas-phase, to gain background-free in-depth insight into chiral interactions. By using mass spectrometry and strong-field ionization of limonene with elliptically polarized light, we demonstrate an efficient chiral discrimination method that produces a chiral signal of one to two orders of magnitude higher than the conventional CD. The chiral response exhibits a strong dependence on wavelength in the range of 1,300-2,400 nm, where the relative abundance of the ion yields alternates between the two enantiomers. The origin of enhanced enantio-sensitivity in intense laser fields is attributed to two mechanisms that rely on the recollision dynamics in a chiral system: (1) the excited ionic state dynamics mediated either by the laser field or by the recollision process, and (2) non-dipole effects that alter the electron's trajectories. Our results can serve as a benchmark for testing and developing theoretical tools involving non-dipole effects in strong-field ionization of molecules.
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Affiliation(s)
- Jean-Luc Bégin
- Department of Physics, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
| | - Maye Alsaawy
- Department of Physics, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
| | - Ravi Bhardwaj
- Department of Physics, University of Ottawa, Ottawa, ON, K1N 6N5, Canada.
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22
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Comby A, Bond CMM, Bloch E, Descamps D, Fabre B, Petit S, Mairesse Y, Greenwood JB, Blanchet V. Using photoelectron elliptical dichroism (PEELD) to determine real-time variation of enantiomeric excess. Chirality 2020; 32:1225-1233. [PMID: 32700433 DOI: 10.1002/chir.23267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/12/2020] [Accepted: 06/23/2020] [Indexed: 11/08/2022]
Abstract
In this work, the photoionization of chiral molecules by an elliptically polarized, high repetition rate, femtosecond laser is probed. The resulting 3D photoelectron angular distribution shows a strong forward-backward asymmetry, which is highly dependent not only on the molecular structure but also on the ellipticity of the laser pulse. By continuously varying the laser ellipticity, we can observe molecular and enantiomer changes in real time at a previously unseen speed and precision. The technique allows enantiomeric excess of a pure compound to be measured with a 5% precision within 3 s, and a 10-min acquisition yields a precision of 0.4%. The isomers camphor and fenchone can be easily distinguished, unlike with conventional mass spectrometry. Preliminary results for the pharmaceutically interesting ibuprofen are also given, showing the capability of photoionization as a means of distinguishing larger molecular systems.
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Affiliation(s)
- Antoine Comby
- CELIA-CNRS-CEA, Université de Bordeaux, Talence, France
| | | | - Etienne Bloch
- CELIA-CNRS-CEA, Université de Bordeaux, Talence, France
| | | | | | | | - Yann Mairesse
- CELIA-CNRS-CEA, Université de Bordeaux, Talence, France
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23
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Kastner A, Koumarianou G, Glodic P, Samartzis PC, Ladda N, Ranecky ST, Ring T, Vasudevan S, Witte C, Braun H, Lee HG, Senftleben A, Berger R, Park GB, Schäfer T, Baumert T. High-resolution resonance-enhanced multiphoton photoelectron circular dichroism. Phys Chem Chem Phys 2020; 22:7404-7411. [PMID: 32215414 DOI: 10.1039/d0cp00470g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectron circular dichroism (PECD) is a highly sensitive enantiospecific spectroscopy for studying chiral molecules in the gas phase using either single-photon ionization or multiphoton ionization. In the short pulse limit investigated with femtosecond lasers, resonance-enhanced multiphoton ionization (REMPI) is rather instantaneous and typically occurs simultaneously via more than one vibrational or electronic intermediate state due to limited frequency resolution. In contrast, vibrational resolution in the REMPI spectrum can be achieved using nanosecond lasers. In this work, we follow the high-resolution approach using a tunable narrow-band nanosecond laser to measure REMPI-PECD through distinct vibrational levels in the intermediate 3s and 3p Rydberg states of fenchone. We observe the PECD to be essentially independent of the vibrational level. This behaviour of the chiral sensitivity may pave the way for enantiomer specific molecular identification in multi-component mixtures: one can specifically excite a sharp, vibrationally resolved transition of a distinct molecule to distinguish different chiral species in mixtures.
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Affiliation(s)
| | - Greta Koumarianou
- Institute of Electronic Structure and Lasers, Foundation for Research and Technology - Hellas (FORTH), P. O. Box 1527, 71110 Heraklion, Greece
| | - Pavle Glodic
- Institute of Electronic Structure and Lasers, Foundation for Research and Technology - Hellas (FORTH), P. O. Box 1527, 71110 Heraklion, Greece
| | - Peter C Samartzis
- Institute of Electronic Structure and Lasers, Foundation for Research and Technology - Hellas (FORTH), P. O. Box 1527, 71110 Heraklion, Greece
| | - Nicolas Ladda
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Simon T Ranecky
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Tom Ring
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | | | - Constantin Witte
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Hendrike Braun
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Han-Gyeol Lee
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Arne Senftleben
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Robert Berger
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - G Barratt Park
- Georg-August-Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany. and Max Planck Institut für Biophysikalische Chemie, Am Fassberg 11, 37077 Göttingen, Germany
| | - Tim Schäfer
- Georg-August-Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany. and Max Planck Institut für Biophysikalische Chemie, Am Fassberg 11, 37077 Göttingen, Germany
| | - Thomas Baumert
- Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
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24
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Lehmann CS, Weitzel KM. Coincident measurement of photo-ion circular dichroism and photo-electron circular dichroism. Phys Chem Chem Phys 2020; 22:13707-13712. [DOI: 10.1039/d0cp01376e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photo-ion circular dichroism (PICD) and photo-electron circular dichroism (PECD) have been measured for the first time simultaneously in a coincidence experiment detecting the chirality of R- and S-Methyloxirane.
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25
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Goetz RE, Koch CP, Greenman L. Perfect control of photoelectron anisotropy for randomly oriented ensembles of molecules by XUV REMPI and polarization shaping. J Chem Phys 2019; 151:074106. [PMID: 31438691 DOI: 10.1063/1.5111362] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report two schemes to generate perfect anisotropy in the photoelectron angular distribution of a randomly oriented ensemble of polyatomic molecules. In order to exert full control over the anisotropy of photoelectron emission, we exploit interferences between single-photon pathways and a manifold of resonantly enhanced two-photon pathways. These are shown to outperform nonsequential (ω, 2ω) bichromatic phase control for the example of CHFClBr molecules. We are able to optimize pulses that yield anisotropic photoelectron emission thanks to a very efficient calculation of photoelectron momentum distributions. This is accomplished by combining elements of quantum chemistry, variational scattering theory, and time-dependent perturbation theory.
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Affiliation(s)
- R Esteban Goetz
- Department of Physics, Kansas State University, 116 Cardwell Hall, 1228 N. 17th St., Manhattan, Kansas 66506-2601, USA
| | - Christiane P Koch
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany
| | - Loren Greenman
- Department of Physics, Kansas State University, 116 Cardwell Hall, 1228 N. 17th St., Manhattan, Kansas 66506-2601, USA
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26
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Comby A, Bloch E, Bond CMM, Descamps D, Miles J, Petit S, Rozen S, Greenwood JB, Blanchet V, Mairesse Y. Real-time determination of enantiomeric and isomeric content using photoelectron elliptical dichroism. Nat Commun 2018; 9:5212. [PMID: 30523259 PMCID: PMC6283843 DOI: 10.1038/s41467-018-07609-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 11/09/2018] [Indexed: 11/09/2022] Open
Abstract
The fast and accurate analysis of chiral chemical mixtures is crucial for many applications but remains challenging. Here we use elliptically-polarized femtosecond laser pulses at high repetition rates to photoionize chiral molecules. The 3D photoelectron angular distribution produced provides molecular fingerprints, showing a strong forward-backward asymmetry which depends sensitively on the molecular structure and degree of ellipticity. Continuously scanning the laser ellipticity and analyzing the evolution of the rich, multi-dimensional molecular signatures allows us to observe real-time changes in the chemical and chiral content present with unprecedented speed and accuracy. We measure the enantiomeric excess of a compound with an accuracy of 0.4% in 10 min acquisition time, and follow the evolution of a mixture with an accuracy of 5% with a temporal resolution of 3 s. This method is even able to distinguish isomers, which cannot be easily distinguished by mass-spectrometry.
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Affiliation(s)
- A Comby
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France
| | - E Bloch
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France
| | - C M M Bond
- School of Maths and Physics, Queen's University, Belfast, BT7 INN, UK
| | - D Descamps
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France
| | - J Miles
- School of Maths and Physics, Queen's University, Belfast, BT7 INN, UK
| | - S Petit
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France
| | - S Rozen
- Weizmann Institute of Science, Rehovot, 76100, Israel
| | - J B Greenwood
- School of Maths and Physics, Queen's University, Belfast, BT7 INN, UK
| | - V Blanchet
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France
| | - Y Mairesse
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405, Talence, France.
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27
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Beaulieu S, Comby A, Descamps D, Petit S, Légaré F, Fabre B, Blanchet V, Mairesse Y. Multiphoton photoelectron circular dichroism of limonene with independent polarization state control of the bound-bound and bound-continuum transitions. J Chem Phys 2018; 149:134301. [DOI: 10.1063/1.5042533] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Beaulieu
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
- Institut National de la Recherche Scientifique, Centre EMT, Varennes, Quebec J3X 1S2,
Canada
| | - A. Comby
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
| | - D. Descamps
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
| | - S. Petit
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
| | - F. Légaré
- Institut National de la Recherche Scientifique, Centre EMT, Varennes, Quebec J3X 1S2,
Canada
| | - B. Fabre
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
| | - V. Blanchet
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
| | - Y. Mairesse
- Université de Bordeaux—CNRS—CEA, CELIA, UMR5107, F33405 Talence, France
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Rafiee Fanood MM, Ganjitabar H, Garcia GA, Nahon L, Turchini S, Powis I. Intense Vibronic Modulation of the Chiral Photoelectron Angular Distribution Generated by Photoionization of Limonene Enantiomers with Circularly Polarized Synchrotron Radiation. Chemphyschem 2018; 19:921-933. [PMID: 29266631 DOI: 10.1002/cphc.201701248] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Indexed: 11/11/2022]
Abstract
Photoionization of the chiral monoterpene limonene has been investigated using polarized synchrotron radiation between the adiabatic ionization threshold, 8.505 and 23.5 eV. A rich vibrational structure is seen in the threshold photoelectron spectrum and is interpreted using a variety of computational methods. The corresponding photoelectron circular dichroism-measured in the photoelectron angular distribution as a forward-backward asymmetry with respect to the photon direction-was found to be strongly dependent on the vibronic structure appearing in the photoelectron spectra, with the observed asymmetry even switching direction in between the major vibrational peaks. This effect can be ultimately attributed to the sensitivity of this dichroism to small phase shifts between adjacent partial waves of the outgoing photoelectron. These observations have implications for potential applications of this chiroptical technique, where the enantioselective analysis of monoterpene components is of particular interest.
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Affiliation(s)
- Mohammad M Rafiee Fanood
- LaserLaB Amsterdam, VU University Amsterdam, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands.,Current address: Department of Imaging Physics, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Hassan Ganjitabar
- School of Chemistry, The University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Gustavo A Garcia
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin BP 48, 91192, Gif sur Yvette Cedex, France
| | - Laurent Nahon
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin BP 48, 91192, Gif sur Yvette Cedex, France
| | - Stefano Turchini
- Istituto Struttura della Materia-CNR (ISM-CNR), Via del Fosso del Cavaliere 100, 00133, Roma, Italy
| | - Ivan Powis
- School of Chemistry, The University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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29
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Turchini S. Conformational effects in photoelectron circular dichroism. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:503001. [PMID: 29087356 DOI: 10.1088/1361-648x/aa9730] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Photoelectron circular dichroism (PECD) is a novel type of spectroscopy, which presents surprising sensitivity to conformational effects in chiral systems. While classical photoelectron spectroscopy mainly responds to conformational effects in terms of energy level shifts, PECD provides a rich and detailed response to tiny changes in electronic and structural properties by means of the intensity dispersion of the circular dichroism as a function of photoelectron kinetic energy. In this work, the basics of PECD will be outlined, emphasizing the role of interference from the [Formula: see text] outgoing partial wave of the photoelectron in the PECD transition matrix element, which is responsible for the extreme sensitivity to conformational effects. Examples using molecular systems and interfaces will shed light on the powerful application of PECD to classical conformational effects such as group substitution, isomerism, conformer population and clustering. Moreover, the PECD results will be reported in challenging new fields where conformations play a key role, such as vibrational effects, transient chirality and time- resolved experiments. To date, PECD has mostly been based on synchrotron radiation facilities, but it also has a future as a table-top lab experiment by means of multiphoton ionization. An important application of PECD as an analytical tool will be reported. The aim of this review is to illustrate that in PECD, the presence of conformational effects is essential for understanding a wide range of effects from a new perspective, making it different from classical spectroscopy.
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Affiliation(s)
- S Turchini
- Istituto di Struttura della Materia-CNR (ISM-CNR), Via del Fosso del Cavaliere 100, 00133 Roma, Italy
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30
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Miles J, Fernandes D, Young A, Bond C, Crane S, Ghafur O, Townsend D, Sá J, Greenwood J. A new technique for probing chirality via photoelectron circular dichroism. Anal Chim Acta 2017; 984:134-139. [DOI: 10.1016/j.aca.2017.06.051] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 10/19/2022]
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31
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Daly S, Powis I, Garcia GA, Tia M, Nahon L. An imaging photoelectron-photoion coincidence investigation of homochiral 2R,3R-butanediol clusters. J Chem Phys 2017; 147:013937. [PMID: 28688422 DOI: 10.1063/1.4983139] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report an experimental investigation of homochiral cluster formation in seeded molecular beam expansions of (2R,3R)-butanediol. Synchrotron radiation vacuum ultraviolet photoionization measurements have been performed using a double imaging electron-ion spectrometer in various configurations and modes of operation. These include measurements of the cluster ion mass spectra, wavelength scanned ion yields, and threshold electron spectra. Protonated cluster ions ranging up to n = 7 have been observed and size-selected photoelectron spectra and photoelectron circular dichroism (PECD) have been recorded by velocity map imaging, recorded in coincidence with ions, at a number of fixed photon energies. Translation temperatures of the cluster ions have been further examined by ion imaging measurements. As well as the sequence of protonated clusters with integral numbers of butanediol monomer units, a second series with half-integral monomer masses is observed and deduced to result from a facile cleavage of a butanediol monomer moiety within the nascent cluster. This second sequence of half-integral masses displays quite distinct behaviours. PECD measurements are used to show that the half-integral mass cluster ions do not share a common parentage with whole integer masses. Using an analogy developed with simple theoretical calculations of butanediol dimer structures, it is inferred that the dissociative branching into integral and half-integral ion mass sequences is controlled by the presence of different butanediol monomer conformations within the hydrogen bonded clusters.
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Affiliation(s)
- Steven Daly
- School of Chemistry, University of Nottingham, University Park NG7 2RD, Nottingham, United Kingdom
| | - Ivan Powis
- School of Chemistry, University of Nottingham, University Park NG7 2RD, Nottingham, United Kingdom
| | - Gustavo A Garcia
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Maurice Tia
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Laurent Nahon
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
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32
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Kastner A, Ring T, Krüger BC, Park GB, Schäfer T, Senftleben A, Baumert T. Intermediate state dependence of the photoelectron circular dichroism of fenchone observed via femtosecond resonance-enhanced multi-photon ionization. J Chem Phys 2017; 147:013926. [DOI: 10.1063/1.4982614] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Tia M, Pitzer M, Kastirke G, Gatzke J, Kim HK, Trinter F, Rist J, Hartung A, Trabert D, Siebert J, Henrichs K, Becht J, Zeller S, Gassert H, Wiegandt F, Wallauer R, Kuhlins A, Schober C, Bauer T, Wechselberger N, Burzynski P, Neff J, Weller M, Metz D, Kircher M, Waitz M, Williams JB, Schmidt LPH, Müller AD, Knie A, Hans A, Ben Ltaief L, Ehresmann A, Berger R, Fukuzawa H, Ueda K, Schmidt-Böcking H, Dörner R, Jahnke T, Demekhin PV, Schöffler M. Observation of Enhanced Chiral Asymmetries in the Inner-Shell Photoionization of Uniaxially Oriented Methyloxirane Enantiomers. J Phys Chem Lett 2017; 8:2780-2786. [PMID: 28582620 DOI: 10.1021/acs.jpclett.7b01000] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Most large molecules are chiral in their structure: they exist as two enantiomers, which are mirror images of each other. Whereas the rovibronic sublevels of two enantiomers are almost identical (neglecting a minuscular effect of the weak interaction), it turns out that the photoelectric effect is sensitive to the absolute configuration of the ionized enantiomer. Indeed, photoionization of randomly oriented enantiomers by left or right circularly polarized light results in a slightly different electron flux parallel or antiparallel with respect to the photon propagation direction-an effect termed photoelectron circular dichroism (PECD). Our comprehensive study demonstrates that the origin of PECD can be found in the molecular frame electron emission pattern connecting PECD to other fundamental photophysical effects such as the circular dichroism in angular distributions (CDAD). Accordingly, distinct spatial orientations of a chiral molecule enhance the PECD by a factor of about 10.
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Affiliation(s)
- Maurice Tia
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Martin Pitzer
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Gregor Kastirke
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Janine Gatzke
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Hong-Keun Kim
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Florian Trinter
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Jonas Rist
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Alexander Hartung
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Daniel Trabert
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Juliane Siebert
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Kevin Henrichs
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Jasper Becht
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Stefan Zeller
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Helena Gassert
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Florian Wiegandt
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Robert Wallauer
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Andreas Kuhlins
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Carl Schober
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Tobias Bauer
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Natascha Wechselberger
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Phillip Burzynski
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Jonathan Neff
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Miriam Weller
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Daniel Metz
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Max Kircher
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Markus Waitz
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Joshua B Williams
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
- Department of Physics, University of Nevada , Reno, Nevada 89557, United States
| | - Lothar Ph H Schmidt
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Anne D Müller
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - André Knie
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Andreas Hans
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Ltaief Ben Ltaief
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Arno Ehresmann
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Robert Berger
- Theoretical Chemistry, Department of Chemistry, Philipps-Universität Marburg , Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Hironobu Fukuzawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , Sendai 980-8577, Japan
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , Sendai 980-8577, Japan
| | - Horst Schmidt-Böcking
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Reinhard Dörner
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Till Jahnke
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Philipp V Demekhin
- Institut für Physik und CINSaT, Universität Kassel , Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Markus Schöffler
- Institut für Kernphysik, Goethe Universität Frankfurt , Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
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34
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Sofikitis D, Suarez J, Schmidt JA, Rakitzis TP, Farantos SC, Janssen MHM. Recoil Inversion in the Photodissociation of Carbonyl Sulfide near 234 nm. PHYSICAL REVIEW LETTERS 2017; 118:253001. [PMID: 28696737 DOI: 10.1103/physrevlett.118.253001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Indexed: 06/07/2023]
Abstract
We report the observation of recoil inversion of the CO (v=0, J_{CO}=66) state in the UV dissociation of lab-frame oriented carbonyl sulfide (OCS). This state is ejected in the opposite direction with respect to all other (>30) states and in absence of any OCS rotation, thus resulting in spatial filtering of this particular high-J rovibrational state. This inversion is caused by resonances occurring in shallow local minima of the molecular potential, which bring the sulfur closer to the oxygen than the carbon atom, and is a striking example where such subtleties severely modify the photofragment trajectories. The resonant behavior is observed only in the photofragment trajectories and not in their population, showing that stereodynamic measurements from oriented molecules offer an indispensable probe for exploring energy landscapes.
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Affiliation(s)
- Dimitris Sofikitis
- LaserLaB Amsterdam, Vrije Universiteit, de Boelelaan 1081, 1081 HV Amsterdam, Netherlands
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece
| | - Jaime Suarez
- Departamento de Qumica, Modulo 13, Universidad Autonoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - Johan A Schmidt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - T Peter Rakitzis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece
- Department of Physics, University of Crete, 70013 Heraklion-Crete, Greece
| | - Stavros C Farantos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece
- Department of Chemistry, University of Crete, 70013 Heraklion-Crete, Greece
| | - Maurice H M Janssen
- LaserLaB Amsterdam, Vrije Universiteit, de Boelelaan 1081, 1081 HV Amsterdam, Netherlands
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35
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Hancock SE, Poad BL, Batarseh A, Abbott SK, Mitchell TW. Advances and unresolved challenges in the structural characterization of isomeric lipids. Anal Biochem 2017; 524:45-55. [DOI: 10.1016/j.ab.2016.09.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/11/2016] [Accepted: 09/16/2016] [Indexed: 12/25/2022]
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36
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Eibenberger S, Doyle J, Patterson D. Enantiomer-Specific State Transfer of Chiral Molecules. PHYSICAL REVIEW LETTERS 2017; 118:123002. [PMID: 28388207 DOI: 10.1103/physrevlett.118.123002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Indexed: 06/07/2023]
Abstract
State-selective enantiomeric excess is realized using microwave-driven coherent population transfer. The method selectively promotes either R or S molecules to a higher rotational state by phase-controlled microwave pulses that drive electric-dipole allowed rotational transitions. We demonstrate the enantiomer-specific state transfer method using enantiopure samples of 1,2-propanediol. This method of state-specific enantiomeric enrichment can be applied to a large class of asymmetric, chiral molecules that can be vaporized and cooled to the point where rotationally resolved spectroscopy is possible, including molecules that rapidly racemize. The rapid chiral switching demonstrated here allows for new approaches in high-precision spectroscopic searches for parity violation in chiral molecules.
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Affiliation(s)
- Sandra Eibenberger
- Harvard University, Department of Physics, 17 Oxford Street, Cambridge, Massachusetts 02138, USA
| | - John Doyle
- Harvard University, Department of Physics, 17 Oxford Street, Cambridge, Massachusetts 02138, USA
| | - David Patterson
- Harvard University, Department of Physics, 17 Oxford Street, Cambridge, Massachusetts 02138, USA
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37
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Fu JY, Htar TT, De Silva L, Tan DMY, Chuah LH. Chromatographic Separation of Vitamin E Enantiomers. Molecules 2017; 22:E233. [PMID: 28165404 PMCID: PMC6155869 DOI: 10.3390/molecules22020233] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/19/2016] [Accepted: 12/20/2016] [Indexed: 01/27/2023] Open
Abstract
Vitamin E is recognized as an essential vitamin since its discovery in 1922. Most vegetable oils contain a mixture of tocopherols and tocotrienols in the vitamin E composition. Structurally, tocopherols and tocotrienols share a similar chromanol ring and a side chain at the C-2 position. Owing to the three chiral centers in tocopherols, they can appear as eight different stereoisomers. Plant sources of tocopherol are naturally occurring in the form of RRR while synthetic tocopherols are usually in the form of all-racemic mixture. Similarly, with only one chiral center, natural tocotrienols occur as the R-isoform. In this review, we aim to discuss a few chromatographic methods that had been used to separate the stereoisomers of tocopherols and tocotrienols. These methods include high performance liquid chromatography, gas chromatography and combination of both. The review will focus on method development including selection of chiral columns, detection method and choice of elution solvent in the context of separation efficiency, resolution and chiral purity. The applications for separation of enantiomers in vitamin E will also be discussed especially in terms of the distinctive biological potency among the stereoisoforms.
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Affiliation(s)
- Ju-Yen Fu
- Nutrition Unit, Product Development and Advisory Services Division, Malaysian Palm Oil Board, 6 Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia.
| | - Thet-Thet Htar
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia.
| | - Leanne De Silva
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia.
| | - Doryn Meam-Yee Tan
- Nutrition Unit, Product Development and Advisory Services Division, Malaysian Palm Oil Board, 6 Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia.
| | - Lay-Hong Chuah
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia.
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38
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Garcia GA, Dossmann H, Nahon L, Daly S, Powis I. Identifying and Understanding Strong Vibronic Interaction Effects Observed in the Asymmetry of Chiral Molecule Photoelectron Angular Distributions. Chemphyschem 2017; 18:500-512. [PMID: 27973748 DOI: 10.1002/cphc.201601250] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/11/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Gustavo A. Garcia
- Synchrotron SOLEIL, L'Orme des Merisiers; St. Aubin BP 48 91192 Gif sur Yvette France
| | - Héloïse Dossmann
- Synchrotron SOLEIL, L'Orme des Merisiers; St. Aubin BP 48 91192 Gif sur Yvette France
- Current address: Sorbonne Universités; UPMC Univ Paris 06, CNRS, Institut Parisien de Chimie Moléculaire (IPCM); 4 Place Jussieu 75252 Paris Cedex 05 France
| | - Laurent Nahon
- Synchrotron SOLEIL, L'Orme des Merisiers; St. Aubin BP 48 91192 Gif sur Yvette France
| | - Steven Daly
- School of Chemistry; University of Nottingham; Nottingham NG7 2RD UK
- Current address: Institut Lumiere Matière, UMR5306, CNRS; Université Lyon 1; 69622 Villeurbanne France
| | - Ivan Powis
- School of Chemistry; University of Nottingham; Nottingham NG7 2RD UK
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39
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Catone D, Turchini S, Contini G, Prosperi T, Stener M, Decleva P, Zema N. Photoelectron circular dichroism of isopropanolamine. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2016.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Rafiee Fanood MM, Janssen MHM, Powis I. Wavelength dependent photoelectron circular dichroism of limonene studied by femtosecond multiphoton laser ionization and electron-ion coincidence imaging. J Chem Phys 2016; 145:124320. [DOI: 10.1063/1.4963229] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Maurice H. M. Janssen
- LaserLaB Amsterdam, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Ivan Powis
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
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41
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Kastner A, Lux C, Ring T, Züllighoven S, Sarpe C, Senftleben A, Baumert T. Enantiomeric Excess Sensitivity to Below One Percent by Using Femtosecond Photoelectron Circular Dichroism. Chemphyschem 2016; 17:1119-22. [DOI: 10.1002/cphc.201501067] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 12/17/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander Kastner
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
| | - Christian Lux
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
| | - Tom Ring
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
| | - Stefanie Züllighoven
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
| | - Cristian Sarpe
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
| | - Arne Senftleben
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
| | - Thomas Baumert
- Institut für Physik und CINSaT; Universität Kassel; Heinrich-Plett-Strasse 40 34132 Kassel Germany
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42
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Shubert VA, Schmitz D, Pérez C, Medcraft C, Krin A, Domingos SR, Patterson D, Schnell M. Chiral Analysis Using Broadband Rotational Spectroscopy. J Phys Chem Lett 2016; 7:341-350. [PMID: 26745342 DOI: 10.1021/acs.jpclett.5b02443] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
broadband microwave spectroscopy is a proven tool to precisely determine molecular properties of gas-phase molecules. Recent developments make it applicable to investigate chiral molecules. Enantiomers can be differentiated, and the enantiomeric excess and, indirectly, the absolute configuration can be determined in a molecule-selective manner. The resonant character and high resolution of rotational spectroscopy provide a unique mixture compatibility. Future directions, such as extending the technique to chemical analysis, are discussed.
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Affiliation(s)
- V Alvin Shubert
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - David Schmitz
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - Cristóbal Pérez
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Universität Hamburg , Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - Chris Medcraft
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - Anna Krin
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - Sérgio R Domingos
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Universität Hamburg , Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - David Patterson
- Department of Physics, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Melanie Schnell
- Max-Planck-Institut für Struktur und Dynamik der Materie , Luruper Chaussee 149, D-22761 Hamburg, Germany
- Center for Free-Electron Laser Science , Luruper Chaussee 149, D-22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Universität Hamburg , Luruper Chaussee 149, D-22761 Hamburg, Germany
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Nahon L, Nag L, Garcia GA, Myrgorodska I, Meierhenrich U, Beaulieu S, Wanie V, Blanchet V, Géneaux R, Powis I. Determination of accurate electron chiral asymmetries in fenchone and camphor in the VUV range: sensitivity to isomerism and enantiomeric purity. Phys Chem Chem Phys 2016; 18:12696-706. [DOI: 10.1039/c6cp01293k] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectron circular dichroism is a chiroptical effect able to distinguish isomers and to determine accurately the enantiopurity of chiral compounds.
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Affiliation(s)
- Laurent Nahon
- Synchrotron SOLEIL
- L'Orme des Merisiers
- 91192 Gif sur Yvette
- France
| | - Lipsa Nag
- Synchrotron SOLEIL
- L'Orme des Merisiers
- 91192 Gif sur Yvette
- France
| | | | - Iuliia Myrgorodska
- Synchrotron SOLEIL
- L'Orme des Merisiers
- 91192 Gif sur Yvette
- France
- Institut de Chimie de Nice
| | - Uwe Meierhenrich
- Institut de Chimie de Nice
- UMR 7272 CNRS
- University Nice Sophia Antipolis
- 06108 Nice
- France
| | - Samuel Beaulieu
- Université de Bordeaux-CNRS-CEA
- CELIA
- UMR 5107
- 33405 Talence
- France
| | - Vincent Wanie
- Université de Bordeaux-CNRS-CEA
- CELIA
- UMR 5107
- 33405 Talence
- France
| | | | | | - Ivan Powis
- School of Chemistry
- University of Nottingham
- Nottingham NG7 2RD
- UK
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