1
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Petrikat RI, Hornbogen J, Schmitt MJP, Resmann E, Wiedemann C, Dilmen NI, Schneider H, Pick AM, Riehn C, Diller R, Becker S. A Photoswitchable Metallocycle Based on Azobenzene: Synthesis, Characterization, and Ultrafast Dynamics. Chemistry 2024; 30:e202400205. [PMID: 38526989 DOI: 10.1002/chem.202400205] [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: 03/05/2024] [Revised: 03/25/2024] [Accepted: 03/25/2024] [Indexed: 03/27/2024]
Abstract
The novel photoswitchable ligand 3,3'-Azobenz(metPA)2 (1) is used to prepare a [Cu2(1)2](BF4)2 metallocycle (2), whose photoisomerization was characterized using static and time-resolved spectroscopic methods. Optical studies demonstrate the highly quantitative and reproducible photoinduced cyclic E/Z switching without decay of the complex. Accordingly and best to our knowledge, [Cu2(1)2](BF4)2 constitutes the first reversibly photoswitchable (3d)-metallocycle based on azobenzene. The photoinduced multiexponential dynamics in the sub-picosecond to few picosecond time domain of 1 and 2 have been assessed. These ultrafast dynamics as well as the yield of the respective photostationary state (PSSZ = 65 %) resemble the behavior of archetypical azobenzene. Also, the innovative pump-probe laser technique of gas phase transient photodissociation (τ-PD) in a mass spectrometric ion trap was used to determine the intrinsic relaxation dynamics for the isolated complex. These results are consistent with the results from femtosecond UV/Vis transient absorption (fs-TA) in solution, emphasizing the azobenzene-like dynamics of 2. This unique combination of fs-TA and τ-PD enables valuable insights into the prevailing interplay of dynamics and solvation. Both analyses (in solution and gas phase) and quantum chemical calculations reveal a negligible effect of the metal coordination on the switching mechanism and electronic pathway, which suggests a non-cooperative isomerization process.
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Affiliation(s)
- Raphael I Petrikat
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
| | - Justin Hornbogen
- Fachbereich Physik, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 46, 67663, Kaiserslautern, Germany
| | - Marcel J P Schmitt
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
| | - Emma Resmann
- Fachbereich Physik, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 46, 67663, Kaiserslautern, Germany
| | - Christina Wiedemann
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
| | - Nesrin I Dilmen
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
| | - Heinrich Schneider
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
| | - Annika M Pick
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
| | - Christoph Riehn
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
- Research Center OPTIMAS, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 46, 67663, Kaiserslautern, Germany
| | - Rolf Diller
- Fachbereich Physik, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 46, 67663, Kaiserslautern, Germany
| | - Sabine Becker
- Fachbereich Chemie, RPTU Kaiserslautern-Landau, Erwin-Schrödinger-Straße 52-54, 67663, Kaiserslautern, Germany
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2
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Suzuki Y, Hirata K, Lisy JM, Ishiuchi SI, Fujii M. A bottom-up approach to the ion recognition mechanism of K + channels from laser spectroscopy of hydrated partial peptide-alkali metal ion complexes. Phys Chem Chem Phys 2022; 24:20803-20812. [PMID: 36000593 DOI: 10.1039/d2cp01667b] [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
K+ channels allow selective permeation of K+, but not physiologically abundant Na+, at almost diffusion limit rates. The conduction mechanism of K+ channels is still controversial, with experimental and computation studies supporting two distinct conduction mechanisms: either with or without water inside the channel. Here, we employ a bottom-up approach on hydrated alkali metal complexes of a model peptide of K+ channels, Ac-Tyr-NHMe, to characterize metal-peptide, metal-water, and water-peptide interactions that govern the selectivity of K+ channels at a molecular level. Both the extension to the series of alkali metal ions and to temperature-dependent studies (approaching physiological values) have revealed the clear difference between permeable and non-permeable ions in the spectral features of the ion complexes. Furthermore, the impact of hydration is discussed in relation to the K+ channels by comparisons of the non-hydrated and hydrated complexes.
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Affiliation(s)
- Yukina Suzuki
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
| | - Keisuke Hirata
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.,Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.
| | - James M Lisy
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.,Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan.,Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.
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3
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Chen L, Dean JLS, Fournier JA. Time-Domain Vibrational Action Spectroscopy of Cryogenically Cooled, Messenger-Tagged Ions Using Ultrafast IR Pulses. J Phys Chem A 2021; 125:10235-10244. [PMID: 34788043 DOI: 10.1021/acs.jpca.1c01996] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we present the initial steps toward developing a framework that will enable the characterization of photoinitiated dynamics within large molecular ions in the gas phase with temporal and energy resolution. We combine the established techniques of tag-loss action spectroscopy on cryogenically trapped molecular ions with ultrafast vibrational spectroscopy by measuring the linear action spectrum of N2-tagged protonated diglycine (GlyGlyH+·N2) with an ultrafast infrared (IR) pulse pair. The presented time-domain data demonstrate that the excited-state vibrational populations in the tagged parent ions are modulated by the ultrafast IR pulse pair and encoded through the messenger tag-loss action response. The Fourier transform of the time-domain action interferograms yields the linear frequency-domain vibrational spectrum of the ion ensemble, and we show that this spectrum matches the linear spectrum collected in a traditional manner using a frequency-resolved IR laser. Time- and frequency-domain interpretations of the data are considered and discussed. Finally, we demonstrate the acquisition of nonlinear signals through cross-polarization pump-probe experiments. These results validate the prerequisite first steps of combining tag-loss action spectroscopy with two-dimensional IR spectroscopy for probing dynamics in gas-phase molecular ions.
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Affiliation(s)
- Liangyi Chen
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130 United States
| | - Jessika L S Dean
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130 United States
| | - Joseph A Fournier
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130 United States
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4
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van Outersterp RE, Martens J, Peremans A, Lamard L, Cuyckens F, Oomens J, Berden G. Evaluation of table-top lasers for routine infrared ion spectroscopy in the analytical laboratory. Analyst 2021; 146:7218-7229. [PMID: 34724520 PMCID: PMC8607882 DOI: 10.1039/d1an01406d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/20/2021] [Indexed: 01/12/2023]
Abstract
Infrared ion spectroscopy is increasingly recognized as a method to identify mass spectrometry-detected analytes in many (bio)chemical areas and its integration in analytical laboratories is now on the horizon. Commercially available quadrupole ion trap mass spectrometers are attractive ion spectroscopy platforms but operate at relatively high pressures. This promotes collisional deactivation which directly interferes with the multiple-photon excitation process required for ion spectroscopy. To overcome this, infrared lasers having a high instantaneous power are required and therefore a majority of analytical studies have been performed at infrared free electron laser facilities. Proliferation of the technique to routine use in analytical laboratories requires table-top infrared lasers and optical parametric oscillators (OPOs) are the most suitable candidates, offering both relatively high intensities and reasonable spectral tuning ranges. Here, we explore the potential of a range of commercially available high-power OPOs for ion spectroscopy, comparing systems with repetition rates of 10 Hz, 20 kHz, 80 MHz and a continuous-wave (cw) system. We compare the performance for various molecular ions and show that the kHz and MHz repetition-rate systems outperform cw and 10 Hz systems in photodissociation efficiency and offer several advantages in terms of cost-effectiveness and practical implementation in an analytical laboratory not specialized in laser spectroscopy.
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Affiliation(s)
- Rianne E van Outersterp
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands.
| | - Jonathan Martens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands.
| | - André Peremans
- Laboratoire Physique de la Matière et du Rayonnement (P.M.R), Université de Namur, 5000 Namur, Belgium
| | | | - Filip Cuyckens
- Drug Metabolism & Pharmacokinetics, Janssen R&D, Beerse, Belgium
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands.
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands.
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5
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Niedner‐Schatteburg G, Kappes MM. Advancing Inorganic Coordination Chemistry by Spectroscopy of Isolated Molecules: Methods and Applications. Chemistry 2021; 27:15027-15042. [PMID: 34636096 PMCID: PMC8596414 DOI: 10.1002/chem.202102815] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Indexed: 12/14/2022]
Abstract
A unique feature of the work carried out in the Collaborative Research Center 3MET continues to be its emphasis on innovative, advanced experimental methods which hyphenate mass-selection with further analytical tools such as laser spectroscopy for the study of isolated molecular ions. This allows to probe the intrinsic properties of the species of interest free of perturbing solvent or matrix effects. This review explains these methods and uses examples from past and ongoing 3MET studies of specific classes of multicenter metal complexes to illustrate how coordination chemistry can be advanced by applying them. As a corollary, we will show how the challenges involved in providing well-defined, for example monoisomeric, samples of the molecular ions have helped to further improve the methods themselves thus also making them applicable to many other areas of chemistry.
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Affiliation(s)
| | - Manfred M. Kappes
- Institute of Physical Chemistry and Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)76128KarlsruheGermany
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6
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Grupe M, Boden P, Di Martino‐Fumo P, Gui X, Bruschi C, Israil R, Schmitt M, Nieger M, Gerhards M, Klopper W, Riehn C, Bizzarri C, Diller R. Time-Resolved Spectroscopy and Electronic Structure of Mono-and Dinuclear Pyridyl-Triazole/DPEPhos-Based Cu(I) Complexes. Chemistry 2021; 27:15251-15270. [PMID: 34550622 PMCID: PMC8597052 DOI: 10.1002/chem.202102760] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Indexed: 12/20/2022]
Abstract
Chemical and spectroscopic characterization of the mononuclear photosensitizers [(DPEPhos)Cu(I)(MPyrT)]0/+ (CuL, CuLH) and their dinuclear analogues (Cu2 L', Cu2 L'H2 ), backed by (TD)DFT and high-level GW-Bethe-Salpeter equation calculations, exemplifies the complex influence of charge, nuclearity and structural flexibility on UV-induced photophysical pathways. Ultrafast transient absorption and step-scan FTIR spectroscopy reveal flattening distortion in the triplet state of CuLH as controlled by charge, which also appears to have a large impact on the symmetry of the long-lived triplet states in Cu2 L' and Cu2 L'H2 . Time-resolved luminescence spectroscopy (solid state), supported by transient photodissociation spectroscopy (gas phase), confirm a lifetime of some tens of μs for the respective triplet states, as well as the energetics of thermally activated delayed luminescence, both being essential parameters for application of these materials based on earth-abundant copper in photocatalysis and luminescent devices.
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Affiliation(s)
- Merten Grupe
- Department of PhysicsTU KaiserslauternErwin-Schrödinger-Straße 4667663KaiserslauternGermany
| | - Pit Boden
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Patrick Di Martino‐Fumo
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Xin Gui
- Institute of Physical ChemistryKarlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 276131KarlsruheGermany
| | - Cecilia Bruschi
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
| | - Roumany Israil
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Marcel Schmitt
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
| | - Martin Nieger
- Department of ChemistryUniversity of HelsinkiA.I. Virtasen aukio 100014HelsinkiFinland
| | - Markus Gerhards
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
- Research Center OPTIMASErwin-Schrödinger-Straße 4667663KaiserslauternGermany
| | - Wim Klopper
- Institute of Physical ChemistryKarlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 276131KarlsruheGermany
| | - Christoph Riehn
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Straße 5267663KaiserslauternGermany
- Research Center OPTIMASErwin-Schrödinger-Straße 4667663KaiserslauternGermany
| | - Claudia Bizzarri
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
| | - Rolf Diller
- Department of PhysicsTU KaiserslauternErwin-Schrödinger-Straße 4667663KaiserslauternGermany
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7
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Kwasigroch B, Khuu T, Perez EH, Denton JK, Schneider EK, Straßner A, Theisen M, Kruppa SV, Weis P, Kappes MM, Riehn C, Johnson MA, Niedner-Schatteburg G. On the Hydrogen Oxalate Binding Motifs onto Dinuclear Cu and Ag Metal Phosphine Complexes. Chemistry 2021; 27:15136-15146. [PMID: 34632659 PMCID: PMC8597048 DOI: 10.1002/chem.202102768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Indexed: 11/23/2022]
Abstract
We report the binding geometries of the isomers that are formed when the hydrogen oxalate ((CO2)2H=HOx) anion attaches to dinuclear coinage metal phosphine complexes of the form [M1M2dcpm2(HOx)]+ with M=Cu, Ag and dcpm=bis(dicyclohexylphosphino)methane, abbreviated [MM]+. These structures are established by comparison of isomer‐selective experimental vibrational band patterns displayed by the cryogenically cooled and N2‐tagged cations with DFT calculations of the predicted spectra for various local minima. Two isomeric classes are identified that feature either attachment of the carboxylate oxygen atoms to the two metal centers (end‐on docking) or attachment of oxygen atoms on different carbon atoms asymmetrically to the metal ions (side‐on docking). Within each class, there are additional isomeric variations according to the orientation of the OH group. This behavior indicates that HOx undergoes strong and directional coordination to [CuCu]+ but adopts a more flexible coordination to [AgAg]+. Infrared spectra of the bare ions, fragmentation thresholds and ion mobility measurements are reported to explore the behaviors of the complexes at ambient temperature.
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Affiliation(s)
- Björn Kwasigroch
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany
| | - Thien Khuu
- Sterling Chemistry Laboratory, Yale University, 225 Prospect Str., New Haven, Connecticut, 06520, USA
| | - Evan H Perez
- Sterling Chemistry Laboratory, Yale University, 225 Prospect Str., New Haven, Connecticut, 06520, USA
| | - Joanna K Denton
- Sterling Chemistry Laboratory, Yale University, 225 Prospect Str., New Haven, Connecticut, 06520, USA
| | - Erik K Schneider
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 2, 76131, Karlsruhe, Germany
| | - Annika Straßner
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany
| | - Marvin Theisen
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany
| | - Sebastian V Kruppa
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany
| | - Patrick Weis
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 2, 76131, Karlsruhe, Germany
| | - Manfred M Kappes
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 2, 76131, Karlsruhe, Germany.,Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Christoph Riehn
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany.,Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663, Kaiserslautern, Germany
| | - Mark A Johnson
- Sterling Chemistry Laboratory, Yale University, 225 Prospect Str., New Haven, Connecticut, 06520, USA
| | - Gereon Niedner-Schatteburg
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany.,Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663, Kaiserslautern, Germany
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8
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Harrilal CP, DeBlase AF, McLuckey SA, Zwier TS. Two-Color IRMPD Applied to Conformationally Complex Ions: Probing Cold Ion Structure and Hot Ion Unfolding. J Phys Chem A 2021; 125:9394-9404. [PMID: 34644093 DOI: 10.1021/acs.jpca.1c08388] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Two-color infrared multiphoton dissociation (2C-IRMPD) spectroscopy is a technique that mitigates spectral distortions due to nonlinear absorption that is inherent to one-color IRMPD. We use a 2C-IRMPD scheme that incorporates two independently tunable IR sources, providing considerable control over the internal energy content and type of spectrum obtained by varying the trap temperature, the time delays and fluences of the two infrared lasers, and whether the first or second laser wavelength is scanned. In this work, we describe the application of this variant of 2C-IRMPD to conformationally complex peptide ions. The 2C-IRMPD technique is used to record near-linear action spectra of both cations and anions with temperatures ranging from 10 to 300 K. We also determine the conditions under which it is possible to record IR spectra of single conformers in a conformational mixture. Furthermore, we demonstrate the capability of the technique to explore conformational unfolding by recording IR spectra with widely varying internal energy in the ion. The protonated peptide ions YGGFL (NH3+-Tyr-Gly-Gly-Phe-Leu, Leu-enkephalin) and YGPAA (NH3+-Tyr-Gly-Pro-Ala-Ala) are used as model systems for exploring the advantages and disadvantages of the method when applied to conformationally complex ions.
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Affiliation(s)
- Christopher P Harrilal
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Andrew F DeBlase
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Scott A McLuckey
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Timothy S Zwier
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States.,Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
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9
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Asymmetric Solvation of the Zinc Dimer Cation Revealed by Infrared Multiple Photon Dissociation Spectroscopy of Zn 2+(H 2O) n ( n = 1-20). Int J Mol Sci 2021; 22:ijms22116026. [PMID: 34199627 PMCID: PMC8199724 DOI: 10.3390/ijms22116026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/20/2021] [Accepted: 05/26/2021] [Indexed: 11/17/2022] Open
Abstract
Investigating metal-ion solvation—in particular, the fundamental binding interactions—enhances the understanding of many processes, including hydrogen production via catalysis at metal centers and metal corrosion. Infrared spectra of the hydrated zinc dimer (Zn2+(H2O)n; n = 1–20) were measured in the O–H stretching region, using infrared multiple photon dissociation (IRMPD) spectroscopy. These spectra were then compared with those calculated by using density functional theory. For all cluster sizes, calculated structures adopting asymmetric solvation to one Zn atom in the dimer were found to lie lower in energy than structures adopting symmetric solvation to both Zn atoms. Combining experiment and theory, the spectra show that water molecules preferentially bind to one Zn atom, adopting water binding motifs similar to the Zn+(H2O)n complexes studied previously. A lower coordination number of 2 was observed for Zn2+(H2O)3, evident from the highly red-shifted band in the hydrogen bonding region. Photodissociation leading to loss of a neutral Zn atom was observed only for n = 3, attributed to a particularly low calculated Zn binding energy for this cluster size.
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10
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Baloglou A, Plattner M, Ončák M, Grutza M, Kurz P, Beyer MK. [Mo 3 S 13 ] 2- as a Model System for Hydrogen Evolution Catalysis by MoS x : Probing Protonation Sites in the Gas Phase by Infrared Multiple Photon Dissociation Spectroscopy. Angew Chem Int Ed Engl 2021; 60:5074-5077. [PMID: 33332676 PMCID: PMC7986116 DOI: 10.1002/anie.202014449] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/04/2020] [Indexed: 11/08/2022]
Abstract
Materials based on molybdenum sulfide are known as efficient hydrogen evolution reaction (HER) catalysts. As the binding site for H atoms on molybdenum sulfides for the catalytic process is under debate, [HMo3 S13 ]- is an interesting molecular model system to address this question. Herein, we probe the [HMo3 S13 ]- cluster in the gas phase by coupling Fourier-transform ion-cyclotron-resonance mass spectrometry (FT-ICR MS) with infrared multiple photon dissociation (IRMPD) spectroscopy. Our investigations show one distinct S-H stretching vibration at 2450 cm-1 . Thermochemical arguments based on DFT calculations strongly suggest a terminal disulfide unit as the H adsorption site.
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Affiliation(s)
- Aristeidis Baloglou
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Manuel Plattner
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
| | - Marie‐Luise Grutza
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF)Albert-Ludwigs-Universität FreiburgAlbertstraße 2179104FreiburgGermany
| | - Philipp Kurz
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF)Albert-Ludwigs-Universität FreiburgAlbertstraße 2179104FreiburgGermany
| | - Martin K. Beyer
- Institut für Ionenphysik und Angewandte PhysikUniversität InnsbruckTechnikerstraße 256020InnsbruckAustria
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11
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Baloglou A, Plattner M, Ončák M, Grutza M, Kurz P, Beyer MK. [Mo
3
S
13
]
2−
als Modellsystem für die katalytische Wasserstoffentwicklung durch MoS
x
: Untersuchung der Protonierungsstellen in der Gasphase durch Infrarot‐Mehrphotonendissoziationsspektroskopie. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aristeidis Baloglou
- Institut für Ionenphysik und Angewandte Physik Universität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Manuel Plattner
- Institut für Ionenphysik und Angewandte Physik Universität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte Physik Universität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
| | - Marie‐Luise Grutza
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF) Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg Deutschland
| | - Philipp Kurz
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF) Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg Deutschland
| | - Martin K. Beyer
- Institut für Ionenphysik und Angewandte Physik Universität Innsbruck Technikerstraße 25 6020 Innsbruck Österreich
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12
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van Geenen FAMG, Kranenburg RF, van Asten AC, Martens J, Oomens J, Berden G. Isomer-Specific Two-Color Double-Resonance IR 2MS 3 Ion Spectroscopy Using a Single Laser: Application in the Identification of Novel Psychoactive Substances. Anal Chem 2021; 93:2687-2693. [PMID: 33470107 PMCID: PMC7859929 DOI: 10.1021/acs.analchem.0c05042] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
![]()
The capability of
an ion trap mass
spectrometer to store ions for
an arbitrary amount of time allows the use of a single infrared (IR)
laser to perform two-color double resonance IR–IR spectroscopic
experiments on mass-to-charge (m/z) selected ions. In this single-laser IR2MS3 scheme, one IR laser frequency is used to remove a selected set
of isomers from the total trapped ion population and the second IR
laser frequency, from the same laser, is used to record the IR spectrum
of the remaining precursor ions. This yields isomer-specific vibrational
spectra of the m/z-selected ions,
which can reveal the structure and identity of the initially co-isolated
isomeric species. The use of a single laser greatly reduces the experimental
complexity of two-color IR2MS3 and enhances
its application in fields employing analytical MS. In this work, we
demonstrate the methodology by acquiring single-laser IR2MS3 spectra in a forensic context, identifying two previously
unidentified isomeric novel psychoactive substances (NPS) from a sample
that was confiscated by the Amsterdam Police.
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Affiliation(s)
- Fred A M G van Geenen
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Ruben F Kranenburg
- Forensic Laboratory, Unit Amsterdam, Dutch National Police, Kabelweg 25, 1014 BA Amsterdam, The Netherlands.,Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Arian C van Asten
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands.,Co van Ledden Hulsebosch Center (CLHC), Amsterdam Center for Forensic Science and Medicine, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Jonathan Martens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Jos Oomens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands.,Van't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Giel Berden
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
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13
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Penna TC, Cervi G, Rodrigues-Oliveira AF, Yamada BD, Lima RZC, Menegon JJ, Bastos EL, Correra TC. Development of a photoinduced fragmentation ion trap for infrared multiple photon dissociation spectroscopy. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34 Suppl 3:e8635. [PMID: 31677291 DOI: 10.1002/rcm.8635] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/07/2019] [Accepted: 10/08/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE Methods for isomer discrimination by mass spectroscopy are of increasing interest. Here we describe the development of a three-dimensional ion trap for infrared multiple photon dissociation (IRMPD) spectroscopy that enables the acquisition of the infrared spectrum of selected ions in the gas phase. This system is suitable for the study of a myriad of chemical systems, including isomer mixtures. METHODS A modified three-dimensional ion trap was coupled to a CO2 laser and an optical parametric oscillator/optical parametric amplifier (OPO/OPA) system operating in the range 2300 to 4000 cm-1 . Density functional theory vibrational frequency calculations were carried out to support spectral assignments. RESULTS Detailed descriptions of the interface between the laser and the mass spectrometer, the hardware to control the laser systems, the automated system for IRMPD spectrum acquisition and data management are presented. The optimization of the crystal position of the OPO/OPA system to maximize the spectroscopic response under low-power laser radiation is also discussed. CONCLUSIONS OPO/OPA and CO2 laser-assisted dissociation of gas-phase ions was successfully achieved. The system was validated by acquiring the IRMPD spectra of model species and comparing with literature data. Two isomeric alkaloids of high economic importance were characterized to demonstrate the potential of this technique, which is now available as an open IRMPD spectroscopy facility in Brazil.
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Affiliation(s)
- Tatiana C Penna
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - Gustavo Cervi
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - André F Rodrigues-Oliveira
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - Bruno D Yamada
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - Rafael Z C Lima
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - Jair J Menegon
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - Erick L Bastos
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
| | - Thiago C Correra
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, São Paulo, SP, Brazil
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14
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Martens J, van Outersterp RE, Vreeken RJ, Cuyckens F, Coene KLM, Engelke UF, Kluijtmans LAJ, Wevers RA, Buydens LMC, Redlich B, Berden G, Oomens J. Infrared ion spectroscopy: New opportunities for small-molecule identification in mass spectrometry - A tutorial perspective. Anal Chim Acta 2019; 1093:1-15. [PMID: 31735202 DOI: 10.1016/j.aca.2019.10.043] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 01/21/2023]
Abstract
Combining the individual analytical strengths of mass spectrometry and infrared spectroscopy, infrared ion spectroscopy is increasingly recognized as a powerful tool for small-molecule identification in a wide range of analytical applications. Mass spectrometry is itself a leading analytical technique for small-molecule identification on the merit of its outstanding sensitivity, selectivity and versatility. The foremost shortcoming of the technique, however, is its limited ability to directly probe molecular structure, especially when contrasted against spectroscopic techniques. In infrared ion spectroscopy, infrared vibrational spectra are recorded for mass-isolated ions and provide a signature that can be matched to reference spectra, either measured from standards or predicted using quantum-chemical calculations. Here we present an overview of the potential for this technique to develop into a versatile analytical method for identifying molecular structures in mass spectrometry-based analytical workflows. In this tutorial perspective, we introduce the reader to the technique of infrared ion spectroscopy and highlight a selection of recent experimental advances and applications in current analytical challenges, in particular in the field of untargeted metabolomics. We report on the coupling of infrared ion spectroscopy with liquid chromatography and present experiments that serve as proof-of-principle examples of strategies to address outstanding challenges.
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Affiliation(s)
- Jonathan Martens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands.
| | - Rianne E van Outersterp
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands
| | - Rob J Vreeken
- Drug Metabolism & Pharmacokinetics, Janssen R&D, Beerse, Belgium
| | - Filip Cuyckens
- Drug Metabolism & Pharmacokinetics, Janssen R&D, Beerse, Belgium
| | - Karlien L M Coene
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Udo F Engelke
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Leo A J Kluijtmans
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ron A Wevers
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Lutgarde M C Buydens
- Radboud University, Institute for Molecules and Materials, Chemometrics, Heyendaalseweg 135, 6525AJ, Nijmegen, the Netherlands
| | - Britta Redlich
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands; van't Hoff Institute for Molecular Sciences, University of Amsterdam, 1098XH, Amsterdam, Science Park 908, the Netherlands.
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15
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Kruppa SV, Groß C, Gui X, Bäppler F, Kwasigroch B, Sun Y, Diller R, Klopper W, Niedner-Schatteburg G, Riehn C, Thiel WR. Photoinitiated Charge Transfer in a Triangular Silver(I) Hydride Complex and Its Oxophilicity. Chemistry 2019; 25:11269-11284. [PMID: 31188502 DOI: 10.1002/chem.201901981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/08/2019] [Indexed: 12/28/2022]
Abstract
The photoexcitation of a triangular silver(I) hydride complex, [Ag3 (μ3 -H)(μ2 -dcpm)3 ](PF6 )2 ([P](PF6 )2 , dcpm=bis(dicyclohexylphosphino)methane), designed with "UV-silent" bis-phosphine ligands, provokes hydride-to-Ag3 single and double electron transfer. The nature of the electronic transitions has been authenticated by absorption and photodissociation spectroscopy in parallel with high-level quantum-chemical computations utilizing the GW method and Bethe-Salpeter equation (GW-BSE). Specific photofragments of mass-selected [P]2+ ions testify to charge transfer and competing pathways resulting from the unique [Ag3 (μ3 -H)]2+ scaffold. This structural motif of [P](PF6 )2 has been unequivocally verified by 1 H NMR spectroscopy in concert with DFT and X-ray diffraction structural analysis, which revealed short equilateral Ag-Ag distances (dAgAg =3.08 Å) within the range of argentophilic interactions. The reduced radical cation [P]. + exhibits strong oxophilicity, forming [P+O2 ].+ ,which is a model intermediate for silver oxidation catalysis.
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Affiliation(s)
- Sebastian V Kruppa
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany
| | - Cedric Groß
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany
| | - Xin Gui
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Florian Bäppler
- Department of Physics, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 46, 67663, Kaiserslautern, Germany
| | - Björn Kwasigroch
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany
| | - Yu Sun
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany
| | - Rolf Diller
- Department of Physics, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 46, 67663, Kaiserslautern, Germany
| | - Wim Klopper
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Gereon Niedner-Schatteburg
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany.,Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663, Kaiserslautern, Germany
| | - Christoph Riehn
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany.,Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663, Kaiserslautern, Germany
| | - Werner R Thiel
- Department of Chemistry, Technische Universität Kaiserslautern (TUK), Erwin-Schrödinger. Str. 52, 67663, Kaiserslautern, Germany
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16
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Duong CH, Yang N, Kelleher PJ, Johnson MA, DiRisio RJ, McCoy AB, Yu Q, Bowman JM, Henderson BV, Jordan KD. Tag-Free and Isotopomer-Selective Vibrational Spectroscopy of the Cryogenically Cooled H9O4+ Cation with Two-Color, IR–IR Double-Resonance Photoexcitation: Isolating the Spectral Signature of a Single OH Group in the Hydronium Ion Core. J Phys Chem A 2018; 122:9275-9284. [DOI: 10.1021/acs.jpca.8b08507] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Chinh H. Duong
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Nan Yang
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Patrick J. Kelleher
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Mark A. Johnson
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Ryan J. DiRisio
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Anne B. McCoy
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Qi Yu
- Department of Chemistry and Cherry L. Emerson Center for Computational Science, Emory University, Atlanta, Georgia 30322, United States
| | - Joel M. Bowman
- Department of Chemistry and Cherry L. Emerson Center for Computational Science, Emory University, Atlanta, Georgia 30322, United States
| | - Bryan V. Henderson
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Kenneth D. Jordan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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17
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Lang J, Hewer JM, Meyer J, Schuchmann J, van Wüllen C, Niedner-Schatteburg G. Magnetostructural correlation in isolated trinuclear iron(iii) oxo acetate complexes. Phys Chem Chem Phys 2018; 20:16673-16685. [PMID: 29877521 DOI: 10.1039/c7cp07549a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We elucidate the correlation between geometric structures and magnetic couplings in trinuclear iron(iii) oxo acetate complexes [Fe3O(OAc)6(Py)n]+ (n = 0, 1, 2, 3) when isolated and trapped as gaseous ions. Structural information arises from Infra Red-Multiple Photon Dissociation (IR-MPD) and Collision Induced Dissociation (CID) experiments in conjuction with Density Functional Theory (DFT) based calculations. We simulate the antiferromagnetic couplings between the FeIII (d5) centers by employing a Broken Symmetry approach within our DFT calculations, and we extract the associated antiferromagnetic coupling constants. Coordination of one, two or three axial pyridine ligands to the [Fe3O(OAc)6]+ subunit distorts the geometry of the triangular Fe3O core. The Fe-Ocentral bond lengths are enlarged or shortened depending on number of coordinated pyridine ligands. This significantly affects the antiferromagnetic coupling constants between the FeIII centers ranging from -62 cm-1 to -28 cm-1 in [Fe3O(OAc)6(Py)n]+ (n = 0, 1, 2, 3). A detailed analysis of the associated exchange couplings indicates a switching of magnetic ground states by pyridine coordination. The total spin ST in the ground states of [Fe3O(OAc)6(Py)n]+ raises from ST = 1/2 (n = 0) to 3/2 (n = 1) and 5/2 (n = 2). Coordination of the third pyridine ligand (n = 3) re-establishes a spin ground state of ST = 1/2. We thus identify a coordination controlled switching of magnetic ground states.
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Affiliation(s)
- Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Joachim M Hewer
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Jonathan Meyer
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Jonas Schuchmann
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Christoph van Wüllen
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
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18
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Kruppa SV, Bäppler F, Holzer C, Klopper W, Diller R, Riehn C. Vibrational Coherence Controls Molecular Fragmentation: Ultrafast Photodynamics of the [Ag 2Cl] + Scaffold. J Phys Chem Lett 2018; 9:804-810. [PMID: 29370699 DOI: 10.1021/acs.jpclett.7b03167] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The recently introduced pump-probe fragmentation action spectroscopy reveals a unique observation of excited state vibrational coherence (430-460 fs) in the isolated metal complex [Ag2(Cl)(dcpm)2)]+ (dcpm = bis(dicyclohexylphosphino)methane) containing the [Ag2Cl]+ scaffold. After photoexcitation by an 1XMCT transition (260 nm) in an ion trap, an unexpected correlation between specific fragment ions (loss of HCl/Cl- vs loss of dcpm) and the phase of the wave packet is probed (1150 nm). Based on ab initio calculations, we assign the primary electronically excited state and ascribe the observed coherences (72-78 cm-1) to contain predominantly Ag-Ag stretch character. We propose specific probe absorption and vibronic coupling at the classical turning points to switch remarkably early on between the different fragmentation pathways. The overall excited state dynamics are fitted to a multiexponential decay with time constants: 0.2-0.4/3-4/19-26/104-161 ps. These findings open new perspectives for further dynamics investigations and possible applications in photocatalysis.
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Affiliation(s)
- Sebastian V Kruppa
- Department of Chemistry, TU Kaiserslautern , Erwin-Schrödinger-Straße 52-54, 67663 Kaiserslautern, Germany
| | - Florian Bäppler
- Department of Physics, TU Kaiserslautern , Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany
| | - Christof Holzer
- Institute of Physical Chemistry, Karlsruhe Institute of Technology , Fritz-Haber Weg 2, 76131 Karlsruhe, Germany
| | - Wim Klopper
- Institute of Physical Chemistry, Karlsruhe Institute of Technology , Fritz-Haber Weg 2, 76131 Karlsruhe, Germany
| | - Rolf Diller
- Department of Physics, TU Kaiserslautern , Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany
| | - Christoph Riehn
- Department of Chemistry, TU Kaiserslautern , Erwin-Schrödinger-Straße 52-54, 67663 Kaiserslautern, Germany
- Landesforschungszentrum OPTIMAS , Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany
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19
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Jašíková L, Roithová J. Infrared Multiphoton Dissociation Spectroscopy with Free-Electron Lasers: On the Road from Small Molecules to Biomolecules. Chemistry 2018; 24:3374-3390. [PMID: 29314303 DOI: 10.1002/chem.201705692] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Indexed: 01/07/2023]
Abstract
Infrared multiphoton dissociation (IRMPD) spectroscopy is commonly used to determine the structure of isolated, mass-selected ions in the gas phase. This method has been widely used since it became available at free-electron laser (FEL) user facilities. Thus, in this Minireview, we examine the use of IRMPD/FEL spectroscopy for investigating ions derived from small molecules, metal complexes, organometallic compounds and biorelevant ions. Furthermore, we outline new applications of IRMPD spectroscopy to study biomolecules.
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Affiliation(s)
- Lucie Jašíková
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, 128 43, Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, 128 43, Czech Republic
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20
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Yang N, Duong CH, Kelleher PJ, Johnson MA, McCoy AB. Isolation of site-specific anharmonicities of individual water molecules in the I−·(H2O)2 complex using tag-free, isotopomer selective IR-IR double resonance. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.09.042] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Cruz-Ortiz AF, Rossa M, Berthias F, Berdakin M, Maitre P, Pino GA. Fingerprints of Both Watson-Crick and Hoogsteen Isomers of the Isolated (Cytosine-Guanine)H + Pair. J Phys Chem Lett 2017; 8:5501-5506. [PMID: 29064704 DOI: 10.1021/acs.jpclett.7b02140] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gas phase protonated guanine-cytosine (CGH+) pair was generated using an electrospray ionization source from solutions at two different pH (5.8 and 3.2). Consistent evidence from MS/MS fragmentation patterns and differential ion mobility spectra (DIMS) point toward the presence of two isomers of the CGH+ pair, whose relative populations depend strongly on the pH of the solution. Gas phase infrared multiphoton dissociation (IRMPD) spectroscopy in the 900-1900 cm-1 spectral range further confirms that the Watson-Crick isomer is preferentially produced (91%) at pH = 5.8, while the Hoogsteen isomer predominates (66%) at pH = 3.2). These fingerprint signatures are expected to be useful for the development of new analytical methodologies and to trigger isomer selective photochemical studies of protonated DNA base pairs.
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Affiliation(s)
- Andrés F Cruz-Ortiz
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET - UNC, Ciudad Universitaria , X5000HUA Córdoba, Argentina
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
| | - Maximiliano Rossa
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET - UNC, Ciudad Universitaria , X5000HUA Córdoba, Argentina
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
| | - Francis Berthias
- Laboratoire de Chimie Physique, Université Paris-Sud, CNRS, Université Paris-Saclay , F-91405 Orsay, France
| | - Matías Berdakin
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET - UNC, Ciudad Universitaria , X5000HUA Córdoba, Argentina
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
| | - Philippe Maitre
- Laboratoire de Chimie Physique, Université Paris-Sud, CNRS, Université Paris-Saclay , F-91405 Orsay, France
| | - Gustavo A Pino
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET - UNC, Ciudad Universitaria , X5000HUA Córdoba, Argentina
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
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22
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Duong CH, Gorlova O, Yang N, Kelleher PJ, Johnson MA, McCoy AB, Yu Q, Bowman JM. Disentangling the Complex Vibrational Spectrum of the Protonated Water Trimer, H +(H 2O) 3, with Two-Color IR-IR Photodissociation of the Bare Ion and Anharmonic VSCF/VCI Theory. J Phys Chem Lett 2017; 8:3782-3789. [PMID: 28737922 DOI: 10.1021/acs.jpclett.7b01599] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Vibrational spectroscopy of the protonated water trimer provides a stringent constraint on the details of the potential energy surface (PES) and vibrational dynamics governing excess proton motion far from equilibrium. Here we report the linear spectrum of the cold, bare H+(H2O)3 ion using a two-color, IR-IR photofragmentation technique and follow the evolution of the bands with increasing ion trap temperature. The key low-energy features are insensitive to both D2 tagging and internal energy. The D2-tagged D+(D2O)3 spectrum is reported for the first time, and the isotope dependence of the band pattern is surprisingly complex. These spectra are reproduced by large-scale vibrational configuration interaction calculations based on a new full-dimensional PES, which treat the anharmonic effects arising from large amplitude motion. The results indicate such extensive mode mixing in both isotopologues that one should be cautious about assigning even the strongest features to particular motions, especially for the absorptions that occur close to the intramolecular bending mode of the water molecule.
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Affiliation(s)
- Chinh H Duong
- Sterling Chemistry Laboratory, Yale University , New Haven, Connecticut 06520, United States
| | - Olga Gorlova
- Sterling Chemistry Laboratory, Yale University , New Haven, Connecticut 06520, United States
| | - Nan Yang
- Sterling Chemistry Laboratory, Yale University , New Haven, Connecticut 06520, United States
| | - Patrick J Kelleher
- Sterling Chemistry Laboratory, Yale University , New Haven, Connecticut 06520, United States
| | - Mark A Johnson
- Sterling Chemistry Laboratory, Yale University , New Haven, Connecticut 06520, United States
| | - Anne B McCoy
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Qi Yu
- Department of Chemistry and Cherry L. Emerson Center for Computational Science, Emory University , Atlanta, Georgia 30322, United States
| | - Joel M Bowman
- Department of Chemistry and Cherry L. Emerson Center for Computational Science, Emory University , Atlanta, Georgia 30322, United States
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23
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Zhu YF, Wang YS, Zhou B, Yu JH, Peng LL, Huang YQ, Li XJ, Chen SH, Tang X, Wang XF. A multifunctional fluorescent aptamer probe for highly sensitive and selective detection of cadmium(II). Anal Bioanal Chem 2017; 409:4951-4958. [DOI: 10.1007/s00216-017-0436-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 04/13/2017] [Accepted: 05/29/2017] [Indexed: 11/28/2022]
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24
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Menges FS, Lang J, Nosenko Y, Kerner C, Gaffga M, Ghoochany LT, Thiel WR, Riehn C, Niedner-Schatteburg G. Exploring the Gas-Phase Activation and Reactivity of a Ruthenium Transfer Hydrogenation Catalyst by Experiment and Theory in Concert. J Phys Chem A 2017; 121:4422-4434. [PMID: 28509543 DOI: 10.1021/acs.jpca.7b02459] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This study elucidates structures, activation barriers, and the gas-phase reactivity of cationic ruthenium transfer hydrogenation catalysts of the structural type [(η6-cym)RuX(pympyr)]+. In these complexes, the central ruthenium(+II) ion is coordinated to an η6-bound p-cymene (η6-cym), a bidentate 2-R-4-(2-pyridinyl)pyrimidine ligand (pympyr) with R = NH2 or N(CH3)2, and an anion X = I-, Br-, Cl-, or CF3SO3-. We present infrared multiple-photon dissociation (IR-MPD) spectra of precursors (before HCl loss) and of activated complexes (after HCl loss), which elucidates C-H activation as the key step in the activation mechanism. A resonant two-color IR-MPD scheme serves to record several otherwise "dark" bands and enhances the validity of spectral assignments. We show that collision-induced dissociation (CID)-derived activation energies of the [(η6-cym)RuX(pympyr)]+ (R = N(CH3)2) complexes depend crucially on the anion X. The obtained activation energies for the HX loss correlate well with quantum chemical activation barriers and are in line with the HSAB concept. We further elucidate the reaction of the activated complexes with D2 under single-collision conditions. Quantum mechanical simulations substantiate that the resulting species represent analogues for hydrido intermediates formed after abstraction of H+ and H- from isopropanol, as postulated for the catalytic cycle of transfer hydrogenation by us before.
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Affiliation(s)
- Fabian S Menges
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Yevgeniy Nosenko
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Christian Kerner
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Leila Taghizadeh Ghoochany
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Christoph Riehn
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
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25
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Hidden role of intermolecular proton transfer in the anomalously diffuse vibrational spectrum of a trapped hydronium ion. Proc Natl Acad Sci U S A 2017; 114:E4706-E4713. [PMID: 28566495 DOI: 10.1073/pnas.1705089114] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
We report the vibrational spectra of the hydronium and methyl-ammonium ions captured in the C3v binding pocket of the 18-crown-6 ether ionophore. Although the NH stretching bands of the CH3NH3+ ion are consistent with harmonic expectations, the OH stretching bands of H3O+ are surprisingly broad, appearing as a diffuse background absorption with little intensity modulation over 800 cm-1 with an onset ∼400 cm-1 below the harmonic prediction. This structure persists even when only a single OH group is present in the HD2O+ isotopologue, while the OD stretching region displays a regular progression involving a soft mode at about 85 cm-1 These results are rationalized in a vibrationally adiabatic (VA) model in which the motion of the H3O+ ion in the crown pocket is strongly coupled with its OH stretches. In this picture, H3O+ resides in the center of the crown in the vibrational zero-point level, while the minima in the VA potentials associated with the excited OH vibrational states are shifted away from the symmetrical configuration displayed by the ground state. Infrared excitation between these strongly H/D isotope-dependent VA potentials then accounts for most of the broadening in the OH stretching manifold. Specifically, low-frequency motions involving concerted motions of the crown scaffold and the H3O+ ion are driven by a Franck-Condon-like mechanism. In essence, vibrational spectroscopy of these systems can be viewed from the perspective of photochemical interconversion between transient, isomeric forms of the complexes corresponding to the initial stage of intermolecular proton transfer.
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26
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Martens J, Koppen V, Berden G, Cuyckens F, Oomens J. Combined Liquid Chromatography-Infrared Ion Spectroscopy for Identification of Regioisomeric Drug Metabolites. Anal Chem 2017; 89:4359-4362. [PMID: 28368097 PMCID: PMC5397882 DOI: 10.1021/acs.analchem.7b00577] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
High-performance liquid chromatography
was used in combination
with infrared ion spectroscopy for the identification of positional
isomers of hydroxy-atorvastatins, the primary metabolites of the drug
atorvastatin. The results demonstrate the direct applicability of
infrared ion spectroscopy in the field of drug metabolism and, more
generally, its promising role in state-of-the-art analytical laboratories
for the identification of small molecules buried in complex mixtures.
In combination with chromatographic separation, infrared spectroscopy
of mass-selected ions provides a promising new route for the identification
of the molecular structures of unknown m/z peaks in a mass spectrum. We demonstrate that currently
existing experimental protocols allow the measurement of an IR spectrum
from less than 10 ng of sample obtained in a collected HPLC fraction.
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Affiliation(s)
- Jonathan Martens
- Radboud University , Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - Valerie Koppen
- Pharmacokinetics, Dynamics & Metabolism, Janssen R&D, B-2340, Beerse, Belgium
| | - Giel Berden
- Radboud University , Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - Filip Cuyckens
- Pharmacokinetics, Dynamics & Metabolism, Janssen R&D, B-2340, Beerse, Belgium
| | - Jos Oomens
- Radboud University , Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands.,van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 908, 1098XH, Amsterdam, The Netherlands
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27
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Andris E, Navrátil R, Jašík J, Terencio T, Srnec M, Costas M, Roithová J. Chasing the Evasive Fe═O Stretch and the Spin State of the Iron(IV)-Oxo Complexes by Photodissociation Spectroscopy. J Am Chem Soc 2017; 139:2757-2765. [PMID: 28125220 DOI: 10.1021/jacs.6b12291] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We demonstrate the application of infrared photodissocation spectroscopy for determination of the Fe═O stretching frequencies of high-valent iron(IV)-oxo complexes [(L)Fe(O)(X)]2+/+ (L = TMC, N4Py, PyTACN, and X = CH3CN, CF3SO3, ClO4, CF3COO, NO3, N3). We show that the values determined by resonance Raman spectroscopy in acetonitrile solutions are on average 9 cm-1 red-shifted with respect to unbiased gas-phase values. Furthermore, we show the assignment of the spin state of the complexes based on the vibrational modes of a coordinated anion and compare reactivities of various iron(IV)-oxo complexes generated as dications or monocations (bearing an anionic ligand). The coordinated anions can drastically affect the reactivity of the complex and should be taken into account when comparing reactivities of complexes bearing different ligands. Comparison of reactivities of [(PyTACN)Fe(O)(X)]+ generated in different spin states and bearing different anionic ligands X revealed that the nature of anion influences the reactivity more than the spin state. The triflate and perchlorate ligands tend to stabilize the quintet state of [(PyTACN)Fe(O)(X)]+, whereas trifluoroacetate and nitrate stabilize the triplet state of the complex.
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Affiliation(s)
- Erik Andris
- Department of Organic Chemistry, Faculty of Science, Charles University , Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Rafael Navrátil
- Department of Organic Chemistry, Faculty of Science, Charles University , Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry, Faculty of Science, Charles University , Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Thibault Terencio
- Department of Organic Chemistry, Faculty of Science, Charles University , Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Martin Srnec
- J. Heyrovsky Institute of Physical Chemistry of the CAS , v.v i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Miquel Costas
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC), University of Girona , Campus Montilivi, Girona 17071, Spain
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science, Charles University , Hlavova 2030/8, 12843 Prague 2, Czech Republic
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28
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Kruppa SV, Bäppler F, Klopper W, Walg SP, Thiel WR, Diller R, Riehn C. Ultrafast excited-state relaxation of a binuclear Ag(i) phosphine complex in gas phase and solution. Phys Chem Chem Phys 2017; 19:22785-22800. [PMID: 28828458 DOI: 10.1039/c7cp04128d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The [Ag2(dcpm)2]2+ phosphine complex displays multiexponential excited-state relaxation dynamics both in the gas phase and in solution.
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Affiliation(s)
- S. V. Kruppa
- Department of Chemistry
- TU Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - F. Bäppler
- Department of Physics
- TU Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - W. Klopper
- Karlsruhe Institute of Technology (KIT)
- Institute of Physical Chemistry
- D-76131 Karlsruhe
- Germany
| | - S. P. Walg
- Institute of Chemistry
- Inorganic Chemistry
- University of Graz
- 8010 Graz
- Austria
| | - W. R. Thiel
- Department of Chemistry
- TU Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - R. Diller
- Department of Physics
- TU Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - C. Riehn
- Department of Chemistry
- TU Kaiserslautern
- D-67663 Kaiserslautern
- Germany
- Forschungszentrum OPTIMAS
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29
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Cooperative Effects in Clusters and Oligonuclear Complexes of Transition Metals in Isolation. STRUCTURE AND BONDING 2016. [DOI: 10.1007/430_2016_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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30
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Martens J, Berden G, Gebhardt CR, Oomens J. Infrared ion spectroscopy in a modified quadrupole ion trap mass spectrometer at the FELIX free electron laser laboratory. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:103108. [PMID: 27802712 DOI: 10.1063/1.4964703] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on modifications made to a Paul-type quadrupole ion trap mass spectrometer and discuss its application in infrared ion spectroscopy experiments. Main modifications involve optical access to the trapped ions and hardware and software coupling to a variety of infrared laser sources at the FELIX infrared free electron laser laboratory. In comparison to previously described infrared ion spectroscopy experiments at the FELIX laboratory, we find significant improvements in efficiency and sensitivity. Effects of the trapping conditions of the ions on the IR multiple photon dissociation spectra are explored. Enhanced photo-dissociation is found at lower pressures in the ion trap. Spectra obtained under reduced pressure conditions are found to more closely mimic those obtained in the high-vacuum conditions of an Fourier transform ion cyclotron resonance mass spectrometer. A gas-mixing system is described enabling the controlled addition of a secondary gas into helium buffer gas flowing into the trap and allows for ion/molecule reactions in the trap. The electron transfer dissociation (ETD) option of the mass spectrometer allows for IR structure characterization of ETD-generated peptide dissociation products.
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Affiliation(s)
- Jonathan Martens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | | | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
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31
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UV fragmentation and ultrafast dynamics of trinuclear silver/1-methylthymine and silver/1-methyluracil metal-base pairs in an ion trap. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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32
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Škríba A, Jašík J, Andris E, Roithová J. Interaction of Ruthenium(II) with Terminal Alkynes: Benchmarking DFT Methods with Spectroscopic Data. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Anton Škríba
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Erik Andris
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843 Prague 2, Czech Republic
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33
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Lang J, Cayir M, Walg SP, Di Martino-Fumo P, Thiel WR, Niedner-Schatteburg G. Intermetallic Competition in the Fragmentation of Trimetallic Au-Zn-Alkali Complexes. Chemistry 2016; 22:2345-55. [PMID: 26785330 DOI: 10.1002/chem.201504093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS; Technische Universität Kaiserslautern; 67663 Kaiserslautern Germany
| | - Merve Cayir
- Fachbereich Chemie and Forschungszentrum OPTIMAS; Technische Universität Kaiserslautern; 67663 Kaiserslautern Germany
| | - Simon P. Walg
- Fachbereich Chemie and Forschungszentrum OPTIMAS; Technische Universität Kaiserslautern; 67663 Kaiserslautern Germany
| | - Patrick Di Martino-Fumo
- Fachbereich Chemie and Forschungszentrum OPTIMAS; Technische Universität Kaiserslautern; 67663 Kaiserslautern Germany
| | - Werner R. Thiel
- Fachbereich Chemie and Forschungszentrum OPTIMAS; Technische Universität Kaiserslautern; 67663 Kaiserslautern Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS; Technische Universität Kaiserslautern; 67663 Kaiserslautern Germany
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34
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Nosenko Y, Riehn C, Niedner-Schatteburg G. Self-pairing of 1-methylthymine mediated by two and three Ag(i) ions: a gas phase study using infrared dissociation spectroscopy and density functional theory. Phys Chem Chem Phys 2016; 18:8491-501. [DOI: 10.1039/c5cp07016c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Metal base pairs comprised of silver dimer or trimer and two thymines were studied by IR dissociation spectroscopy and density functional theory.
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Affiliation(s)
- Yevgeniy Nosenko
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- Kaiserslautern 67663
- Germany
| | - Christoph Riehn
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- Kaiserslautern 67663
- Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- Kaiserslautern 67663
- Germany
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35
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Gaffga M, Munstein I, Müller P, Lang J, Thiel WR, Niedner-Schatteburg G. Multistate-Mediated Rearrangements and FeCl2 Elimination in Dinuclear FePd Complexes. J Phys Chem A 2015; 119:12587-98. [PMID: 26595679 DOI: 10.1021/acs.jpca.5b06952] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mass spectrometric, spectroscopic, and computational characterization of a novel bifunctional iron-palladium complex proves a change of coordination upon solvation. Collisional excitation reveals FeCl2 and HCl elimination in a solvent-modulated competition. Hereby, syn and anti isomers, identified by theoretical calculations, favor and disfavor FeCl2 elimination, respectively. The FeCl2 elimination likely proceeds by chlorido and Cp ligand exchange among the metallic centers in a concerted, ballet-like manner. A multitude of stationary points were identified along the computed multistep reaction coordinates of the three conceivable spin states. The quintet state shows a static Jahn-Teller type relaxation by a tilt away of the Cp ligand at the iron center. The direct singlet-quintet spin crossover is an unprecedented assumption, leaving behind the triplet state as a spectator without involvement. The FeCl2 elimination would decrease catalytic activity. It is kinetically hindered within a range of applicable temperatures in conceivable technical applications.
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Affiliation(s)
- Maximilian Gaffga
- Fachbereich Chemie und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Isabel Munstein
- Fachbereich Chemie und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Patrick Müller
- Fachbereich Chemie und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Johannes Lang
- Fachbereich Chemie und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
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36
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37
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Fournier JA, Wolke CT, Johnson MA, Odbadrakh TT, Jordan KD, Kathmann SM, Xantheas SS. Snapshots of Proton Accommodation at a Microscopic Water Surface: Understanding the Vibrational Spectral Signatures of the Charge Defect in Cryogenically Cooled H+(H2O)n=2–28 Clusters. J Phys Chem A 2015; 119:9425-40. [DOI: 10.1021/acs.jpca.5b04355] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Joseph A. Fournier
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Conrad T. Wolke
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Mark A. Johnson
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Tuguldur T. Odbadrakh
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15620, United States
| | - Kenneth D. Jordan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15620, United States
| | - Shawn M. Kathmann
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MS K1-83, Richland, Washington 99352, United States
| | - Sotiris S. Xantheas
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MS K1-83, Richland, Washington 99352, United States
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38
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Berdakin M, Steinmetz V, Maitre P, Pino GA. On the Ag+–cytosine interaction: the effect of microhydration probed by IR optical spectroscopy and density functional theory. Phys Chem Chem Phys 2015; 17:25915-24. [DOI: 10.1039/c5cp02221e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single water molecule hydration stabilizes two quasi-isoenergetic complexes of cytosine⋯Ag+.
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Affiliation(s)
- Matias Berdakin
- INFIQC (CONICET – Universidad Nacional de Córdoba)
- Dpto. de Fisicoquímica
- Facultad de Ciencias Químicas
- Centro Láser de Ciencias Moleculares
- Universidad Nacional de Córdoba
| | - Vincent Steinmetz
- Laboratoire de Chimie Physique
- Université Paris Sud
- UMR8000 CNRS
- Faculté des Sciences
- 91405 Orsay Cedex
| | - Philippe Maitre
- Laboratoire de Chimie Physique
- Université Paris Sud
- UMR8000 CNRS
- Faculté des Sciences
- 91405 Orsay Cedex
| | - Gustavo A. Pino
- INFIQC (CONICET – Universidad Nacional de Córdoba)
- Dpto. de Fisicoquímica
- Facultad de Ciencias Químicas
- Centro Láser de Ciencias Moleculares
- Universidad Nacional de Córdoba
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39
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Imanbaew D, Nosenko Y, Kerner C, Chevalier K, Rupp F, Riehn C, Thiel W, Diller R. Excited-state dynamics of a ruthenium(II) catalyst studied by transient photofragmentation in gas phase and transient absorption in solution. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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40
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Berdakin M, Steinmetz V, Maitre P, Pino GA. Gas Phase Structure of Metal Mediated (Cytosine)2Ag+ Mimics the Hemiprotonated (Cytosine)2H+ Dimer in i-Motif Folding. J Phys Chem A 2014; 118:3804-3809. [DOI: 10.1021/jp5038969] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Matias Berdakin
- INFIQC (CONICET
− Universidad Nacional de Córdoba), Departamento de
Fisicoquímica, Facultad de Ciencias Químicas, Centro
Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Córdoba, Argentina
| | - Vincent Steinmetz
- Laboratoire de Chimie Physique, Université Paris Sud, UMR8000 CNRS, Faculté des Sciences, 91405 Orsay Cedex, France
| | - Philippe Maitre
- Laboratoire de Chimie Physique, Université Paris Sud, UMR8000 CNRS, Faculté des Sciences, 91405 Orsay Cedex, France
| | - Gustavo A. Pino
- INFIQC (CONICET
− Universidad Nacional de Córdoba), Departamento de
Fisicoquímica, Facultad de Ciencias Químicas, Centro
Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Córdoba, Argentina
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41
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Rijs AM, Oomens J. IR Spectroscopic Techniques to Study Isolated Biomolecules. Top Curr Chem (Cham) 2014; 364:1-42. [DOI: 10.1007/128_2014_621] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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42
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Lang J, Gaffga M, Menges F, Niedner-Schatteburg G. Two-color delay dependent IR probing of torsional isomerization in a [AgL1L2]+complex. Phys Chem Chem Phys 2014; 16:17417-21. [DOI: 10.1039/c4cp02045f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-color infrared multiple photon dissociation (2c-IR-MPD) spectroscopy with delayed pulses indicates a torsional isomerization in a “ligand–metal–chelate” complex [AgL1L2]+.
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Affiliation(s)
- Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
| | - Fabian Menges
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
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