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Kjaer C, Vu-Phung A, Toft Lindkvist T, Langeland J, Brøndsted Nielsen S. Cryogenic Ion Fluorescence Spectroscopy: FRET in Rhodamine Homodimers and Heterodimers. Chemistry 2023; 29:e202302166. [PMID: 37565666 DOI: 10.1002/chem.202302166] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/02/2023] [Accepted: 08/07/2023] [Indexed: 08/12/2023]
Abstract
The internal electronic communication between two or more light-absorbers is fundamental for energy-transport processes, a field of large current interest. Here the intrinsic photophysics of homo- and heterodimers of rhodamine cations were studied where just two methylene units bridge the dyes. Gas-phase experiments were done on frozen molecular ions at cryogenic temperatures using the newly built LUNA2 mass spectroscopy setup in Aarhus. Both absorption (from fluorescence excitation) and dispersed-fluorescence spectra were measured. In the gas phase, there is no dielectric screening from solvent molecules, and the effect of charges on transition energies is maximum. Indeed, bands are redshifted compared to those of monomer dyes due to the electric field that each dye senses from the other in a dimer. Importantly, also, as two chemically identical dyes in a homodimer do not experience the same field along the long axis, each dye has separate absorption. At low temperatures, it is therefore possible to selectively excite one dye. Fluorescence is dominantly from the dye with the lowest transition energy no matter which dye is photoexcited. Hence this work unequivocally demonstrates Förster Resonance Energy Transfer even in homodimers where one dye acts as donor and the other as acceptor.
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Affiliation(s)
- Christina Kjaer
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
| | - André Vu-Phung
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
| | - Thomas Toft Lindkvist
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
| | - Jeppe Langeland
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
| | - Steen Brøndsted Nielsen
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark
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2
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Tureček F. UV-vis spectroscopy of gas-phase ions. MASS SPECTROMETRY REVIEWS 2023; 42:206-226. [PMID: 34392556 DOI: 10.1002/mas.21726] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
Photodissociation action spectroscopy has made a great progress in expanding investigations of gas-phase ion structures. This review deals with aspects of gas-phase ion electronic excitations that result in wavelength-dependent dissociation and light emission via fluorescence, chiefly covering the ultraviolet and visible regions of the spectrum. The principles are briefly outlined and a few examples of instrumentation are presented. The main thrust of the review is to collect and selectively present applications of UV-vis action spectroscopy to studies of stable gas-phase ion structures and combinations of spectroscopy with ion mobility, collision-induced dissociation, and ion-ion reactions leading to the generation of reactive intermediates and electronic energy transfer.
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Affiliation(s)
- František Tureček
- Department of Chemistry, University of Washington, Seattle, Washington, USA
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3
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Mehara J, Koovakattil Surendran A, van Wieringen T, Setia D, Foroutan-Nejad C, Straka M, Rulíšek L, Roithová J. Cationic Gold(II) Complexes: Experimental and Theoretical Study. Chemistry 2022; 28:e202201794. [PMID: 35946558 DOI: 10.1002/chem.202201794] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Indexed: 01/07/2023]
Abstract
Gold(II) complexes are rare, and their application to the catalysis of chemical transformations is underexplored. The reason is their easy oxidation or reduction to more stable gold(III) or gold(I) complexes, respectively. We explored the thermodynamics of the formation of [AuII (L)(X)]+ complexes (L=ligand, X=halogen) from the corresponding gold(III) precursors and investigated their stability and spectral properties in the IR and visible range in the gas phase. The results show that the best ancillary ligands L for stabilizing gaseous [AuII (L)(X)]+ complexes are bidentate and tridentate ligands with nitrogen donor atoms. The electronic structure and spectral properties of the investigated gold(II) complexes were correlated with quantum chemical calculations. The results show that the molecular and electronic structure of the gold(II) complexes as well as their spectroscopic properties are very similar to those of analogous stable copper(II) complexes.
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Affiliation(s)
- Jaya Mehara
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525AJ, Nijmegen (The, Netherlands
| | - Adarsh Koovakattil Surendran
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525AJ, Nijmegen (The, Netherlands
| | - Teun van Wieringen
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525AJ, Nijmegen (The, Netherlands
| | - Deeksha Setia
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525AJ, Nijmegen (The, Netherlands
| | - Cina Foroutan-Nejad
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí. 2, 16610, Prague, Czech Republic
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí. 2, 16610, Prague, Czech Republic
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí. 2, 16610, Prague, Czech Republic
| | - Jana Roithová
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525AJ, Nijmegen (The, Netherlands
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4
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Djavani-Tabrizi I, Jockusch RA. Gas-Phase Fluorescence of Proflavine Reveals Two Close-Lying, Brightly Emitting States. J Phys Chem Lett 2022; 13:2187-2192. [PMID: 35230120 DOI: 10.1021/acs.jpclett.2c00201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surprising excitation-dependent, dual emission from a small organic model fluorophore is reported. Gas-phase fluorescence spectra of proflavine (a diaminoacridine) ions reveal two long-lived emitting states, with distinct bands separated by just 1700 cm-1. The relative intensities of these two bands depend on the excitation wavelength. Time-dependent density functional theory (TD-DFT) calculations support the existence of two close-lying singlet electronic states, with excitation into S2 predicted to be >1000-fold more likely than into S1. These data strongly suggest that internal conversion (IC) rates are suppressed relative to solvated proflavine, and that IC is competitive with intramolecular vibrational relaxation (IVR). This work offers an in-depth assessment of the gas-phase photophysics of a simple fluorophore that could open a new pathway to understanding dual emission in fluorophores.
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Affiliation(s)
| | - Rebecca A Jockusch
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S3H6, Canada
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5
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Marlton SJP, Trevitt A. Laser Photodissocation, Action Spectroscopy and Mass Spectrometry Unite to Detect and Separate Isomers. Chem Commun (Camb) 2022; 58:9451-9467. [DOI: 10.1039/d2cc02101c] [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
The separation and detection of isomers remains a challenge for many areas of mass spectrometry. This article highlights laser photodissociation and ion mobility strategies that have been deployed to tackle...
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6
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Asvany O, Schlemmer S. Rotational action spectroscopy of trapped molecular ions. Phys Chem Chem Phys 2021; 23:26602-26622. [PMID: 34817492 DOI: 10.1039/d1cp03975j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Rotational action spectroscopy is an experimental method in which rotational spectra of molecules, typically in the microwave to sub-mm-wave domain of the electromagnetic spectrum (∼1-1000 GHz), are recorded by action spectroscopy. Action spectroscopy means that the spectrum is recorded not by detecting the absorption of light by the molecules, but by the action of the light on the molecules, e.g., photon-induced dissociation of a chemical bond, a photon-triggered reaction, or photodetachment of an electron. Typically, such experiments are performed on molecular ions, which can be well controlled and mass-selected by guiding and storage techniques. Though coming with many advantages, the application of action schemes to rotational spectroscopy was hampered for a long time by the small energy content of a corresponding photon. Therefore, the first rotational action spectroscopic methods emerged only about one decade ago. Today, there exists a toolbox full of different rotational action spectroscopic schemes which are summarized in this review.
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Affiliation(s)
- Oskar Asvany
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany.
| | - Stephan Schlemmer
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany.
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7
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Salomon T, Doménech JL, Schmid PC, Michael EA, Schlemmer S, Asvany O. Rovibrational spectroscopy of the CH +-He and CH +-He 4 complexes. JOURNAL OF MOLECULAR SPECTROSCOPY 2021; 377:111421. [PMID: 34262226 PMCID: PMC7611196 DOI: 10.1016/j.jms.2021.111421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A cryogenic 22-pole ion trap apparatus is used in combination with a table-top pulsed IR source to probe weakly bound CH+-He and CH+-He4 complexes by predissociation spectroscopy at 4 K. The infrared photodissociation spectra of the C-H stretching vibrations are recorded in the range of 2720-2800 cm-1. The spectrum of CH+-He exhibits perpendicular transitions of a near prolate top with a band origin at 2745.9 cm-1, and thus confirms it to have a T-shaped structure. For CH+-He4, the C-H stretch along the symmetry axis of this oblate top results in parallel transitions.
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Affiliation(s)
- Thomas Salomon
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
| | - José L Doménech
- Instituto de Estructura de la Materia (IEM-CSIC), Serrano 123, 28006 Madrid, Spain
| | - Philipp C Schmid
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
| | - Ernest A Michael
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
- Department of Electrical Engineering, University of Chile, Av. Tupper 2007, Santiago, Chile
| | - Stephan Schlemmer
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
| | - Oskar Asvany
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
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8
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Zelenka J, Cibulka R, Roithová J. Flavinium Catalysed Photooxidation: Detection and Characterization of Elusive Peroxyflavinium Intermediates. Angew Chem Int Ed Engl 2019; 58:15412-15420. [PMID: 31364790 PMCID: PMC6852162 DOI: 10.1002/anie.201906293] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/08/2019] [Indexed: 12/18/2022]
Abstract
Flavin-based catalysts are photoactive in the visible range which makes them useful in biology and chemistry. Herein, we present electrospray-ionization mass-spectrometry detection of short-lived intermediates in photooxidation of toluene catalysed by flavinium ions (Fl+ ). Previous studies have shown that photoexcited flavins react with aromates by proton-coupled electron transfer (PCET) on the microsecond time scale. For Fl+ , PCET leads to FlH.+ with the H-atom bound to the N5 position. We show that the reaction continues by coupling between FlH.+ and hydroperoxy or benzylperoxy radicals at the C4a position of FlH.+ . These results demonstrate that the N5-blocking effect reported for alkylated flavins is also active after PCET in these photocatalytic reactions. Structures of all intermediates were fully characterised by isotopic labelling and by photodissociation spectroscopy. These tools provide a new way to study reaction intermediates in the sub-second time range.
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Affiliation(s)
- Jan Zelenka
- Department of Spectroscopy and CatalysisInstitute for Molecules and MaterialsRadboud University NijmegenHeyendaalseweg 1356525AJNijmegenThe Netherlands
| | - Radek Cibulka
- Department of organic chemistryFaculty of Chemical TechnologyUniversity of Chemistry and Technology PragueTechnická 5166 28Prague 6Czech Republic
| | - Jana Roithová
- Department of Spectroscopy and CatalysisInstitute for Molecules and MaterialsRadboud University NijmegenHeyendaalseweg 1356525AJNijmegenThe Netherlands
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9
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Characterized cis-Fe V(O)(OH) intermediate mimics enzymatic oxidations in the gas phase. Nat Commun 2019; 10:901. [PMID: 30796210 PMCID: PMC6385299 DOI: 10.1038/s41467-019-08668-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/16/2019] [Indexed: 02/04/2023] Open
Abstract
FeV(O)(OH) species have long been proposed to play a key role in a wide range of biomimetic and enzymatic oxidations, including as intermediates in arene dihydroxylation catalyzed by Rieske oxygenases. However, the inability to accumulate these intermediates in solution has thus far prevented their spectroscopic and chemical characterization. Thus, we use gas-phase ion spectroscopy and reactivity analysis to characterize the highly reactive [FeV(O)(OH)(5tips3tpa)]2+ (32+) complex. The results show that 32+ hydroxylates C–H bonds via a rebound mechanism involving two different ligands at the Fe center and dihydroxylates olefins and arenes. Hence, this study provides a direct evidence of FeV(O)(OH) species in non-heme iron catalysis. Furthermore, the reactivity of 32+ accounts for the unique behavior of Rieske oxygenases. The use of gas-phase ion characterization allows us to address issues related to highly reactive intermediates that other methods are unable to solve in the context of catalysis and enzymology. FeV(O)(OH) species have long been thought to play a role in a range of enzymatic oxidations, but their characterization has remained elusive. Here, using gas-phase ion spectroscopy, the authors characterize an FeV(O)(OH) species and find that its reactivity mimics that of Rieske oxygenases.
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10
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Töpfer M, Schmid PC, Kohguchi H, Yamada KMT, Schlemmer S, Asvany O. Infrared photodissociation of cold CH3+–He2 complexes. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1563727] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Matthias Töpfer
- I. Physikalisches Institut, Universität zu Köln, Köln, Germany
| | | | - Hiroshi Kohguchi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima Japan
| | | | | | - Oskar Asvany
- I. Physikalisches Institut, Universität zu Köln, Köln, Germany
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11
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Kung JCK, Forman A, Jockusch RA. The effect of methylation on the intrinsic photophysical properties of simple rhodamines. Phys Chem Chem Phys 2019; 21:10261-10271. [DOI: 10.1039/c9cp00730j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Gas-phase studies of progressively methylated rhodamines display unexpected photophysical trends that are obscured in solution, revealing key solvent effects.
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Affiliation(s)
| | - Adam Forman
- Department of Chemistry, University of Toronto
- Toronto
- Canada
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12
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Stockett MH, Björkhage M, Cederquist H, Schmidt HT, Zettergren H. Storage time dependent photodissociation action spectroscopy of polycyclic aromatic hydrocarbon cations in the cryogenic electrostatic storage ring DESIREE. Faraday Discuss 2019; 217:126-137. [DOI: 10.1039/c8fd00161h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intrinsic absorption profile and radiative cooling rate of coronene cations are reported.
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13
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Strelnikov DV, Jašík J, Gerlich D, Murata M, Murata Y, Komatsu K, Roithová J. Near- and Mid-IR Gas-Phase Absorption Spectra of H 2@C 60+-He. J Phys Chem A 2018; 122:8162-8166. [PMID: 30060658 DOI: 10.1021/acs.jpca.8b06222] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Near- and mid-IR absorption spectra of endohedral H2@C60+ have been measured using He-tagging. The samples have been prepared using a "molecular surgery" synthetic approach and were ionized and spectroscopically characterized in the gas phase. In contrast to neutral C60 and H2@C60, the corresponding He-tagged cationic species show distinct spectral differences. Shifts and line splittings in the near- and mid-IR regions indicate the influence of the caged hydrogen molecule on both the electronic ground and excited states. Possible relevance to astronomy is discussed.
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Affiliation(s)
- Dmitry V Strelnikov
- Division of Physical Chemistry of Microscopic Systems , Karlsruhe Institute of Technology (KIT) , Karlsruhe , Germany
| | - Juraj Jašík
- Department of Organic Chemistry, Faculty of Science , Charles University in Prague , 12843 Prague 2 , Czech Republic
| | - Dieter Gerlich
- Department of Physics , University of Technology , 09107 Chemnitz , Germany
| | - Michihisa Murata
- Institute for Chemical Research , Kyoto University , Kyoto 611-0011 , Japan
| | - Yasujiro Murata
- Institute for Chemical Research , Kyoto University , Kyoto 611-0011 , Japan
| | - Koichi Komatsu
- Institute for Chemical Research , Kyoto University , Kyoto 611-0011 , Japan
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science , Charles University in Prague , 12843 Prague 2 , Czech Republic
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14
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Andris E, Navrátil R, Jašík J, Puri M, Costas M, Que L, Roithová J. Trapping Iron(III)-Oxo Species at the Boundary of the "Oxo Wall": Insights into the Nature of the Fe(III)-O Bond. J Am Chem Soc 2018; 140:14391-14400. [PMID: 30336001 DOI: 10.1021/jacs.8b08950] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Terminal non-heme iron(IV)-oxo compounds are among the most powerful and best studied oxidants of strong C-H bonds. In contrast to the increasing number of such complexes (>80 thus far), corresponding one-electron-reduced derivatives are much rarer and presumably less stable, and only two iron(III)-oxo complexes have been characterized to date, both of which are stabilized by hydrogen-bonding interactions. Herein we have employed gas-phase techniques to generate and identify a series of terminal iron(III)-oxo complexes, all without built-in hydrogen bonding. Some of these complexes exhibit ∼70 cm-1 decrease in ν(Fe-O) frequencies expected for a half-order decrease in bond order upon one-electron reduction to an S = 5/2 center, while others have ν(Fe-O) frequencies essentially unchanged from those of their parent iron(IV)-oxo complexes. The latter result suggests that the added electron does not occupy a d orbital with Fe═O antibonding character, requiring an S = 3/2 spin assignment for the nascent FeIII-O- species. In the latter cases, water is found to hydrogen bond to the FeIII-O- unit, resulting in a change from quartet to sextet spin state. Reactivity studies also demonstrate the extraordinary basicity of these iron(III)-oxo complexes. Our observations show that metal-oxo species at the boundary of the "Oxo Wall" are accessible, and the data provide a lead to detect iron(III)-oxo intermediates in biological and biomimetic reactions.
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Affiliation(s)
- Erik Andris
- Department of Organic Chemistry, Faculty of Science , Charles University , Hlavova 2030/8 , 128 43 Prague 2 , Czech Republic
| | - Rafael Navrátil
- Department of Organic Chemistry, Faculty of Science , Charles University , Hlavova 2030/8 , 128 43 Prague 2 , Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry, Faculty of Science , Charles University , Hlavova 2030/8 , 128 43 Prague 2 , Czech Republic
| | - Mayank Puri
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Miquel Costas
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC) , University of Girona , Campus Montilivi , Girona 17071 , Spain
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science , Charles University , Hlavova 2030/8 , 128 43 Prague 2 , Czech Republic.,Institute for Molecules and Materials , Radboud University , Heyendaalseweg 135 , 6525 AJ Nijmegen , Netherlands
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15
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Töpfer M, Salomon T, Kohguchi H, Dopfer O, Yamada KMT, Schlemmer S, Asvany O. Double Resonance Rotational Spectroscopy of Weakly Bound Ionic Complexes: The Case of Floppy CH_{3}^{+}-He. PHYSICAL REVIEW LETTERS 2018; 121:143001. [PMID: 30339424 DOI: 10.1103/physrevlett.121.143001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 06/08/2023]
Abstract
A novel rotational spectroscopy method applicable to ions stored in cold traps is presented. In a double resonance scheme, rotational excitation is followed by vibrational excitation into a dissociative resonance. Its general applicability is demonstrated for the CH_{3}^{+}-He complex, which undergoes predissociation through its C-H stretching modes ν_{1} and ν_{3}. High resolution rotational transitions are recorded for this symmetric top, and small unexpected splittings are resolved for K=1. Advantages and potential future applications of this new approach are discussed.
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Affiliation(s)
- Matthias Töpfer
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
| | - Thomas Salomon
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
| | - Hiroshi Kohguchi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, D-10623 Berlin, Germany
| | | | - Stephan Schlemmer
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
| | - Oskar Asvany
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
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16
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Navrátil R, Wiedbrauk S, Jašík J, Dube H, Roithová J. Transforming hemithioindigo from a two-way to a one-way molecular photoswitch by isolation in the gas phase. Phys Chem Chem Phys 2018; 20:6868-6876. [PMID: 29485646 DOI: 10.1039/c8cp00096d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Photoswitching of a permanently charged hemithioindigo switch was probed by two photon experiments in the gas phase at 3 K.
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Affiliation(s)
- Rafael Navrátil
- Department of Organic Chemistry
- Faculty of Science
- Charles University
- 12843 Prague 2
- Czech Republic
| | - Sandra Wiedbrauk
- Department für Chemie and Munich Center for Integrated Protein Science CIPSM
- Ludwig-Maximilians-Universitat München
- Germany
| | - Juraj Jašík
- Department of Organic Chemistry
- Faculty of Science
- Charles University
- 12843 Prague 2
- Czech Republic
| | - Henry Dube
- Department für Chemie and Munich Center for Integrated Protein Science CIPSM
- Ludwig-Maximilians-Universitat München
- Germany
| | - Jana Roithová
- Department of Organic Chemistry
- Faculty of Science
- Charles University
- 12843 Prague 2
- Czech Republic
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17
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Spin-State-Controlled Photodissociation of Iron(III) Azide to an Iron(V) Nitride Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707420] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Andris E, Navrátil R, Jašík J, Sabenya G, Costas M, Srnec M, Roithová J. Spin-State-Controlled Photodissociation of Iron(III) Azide to an Iron(V) Nitride Complex. Angew Chem Int Ed Engl 2017; 56:14057-14060. [DOI: 10.1002/anie.201707420] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Erik Andris
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Rafael Navrátil
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Gerard Sabenya
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC); University of Girona; Campus Montilivi Girona 17071 Spain
| | - Miquel Costas
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC); University of Girona; Campus Montilivi Girona 17071 Spain
| | - Martin Srnec
- J. Heyrovsky Institute of Physical Chemistry of the CAS, v. v. i.; Dolejškova 2155/3 18223 Prague 8 Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 2030/8 128 43 Prague 2 Czech Republic
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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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Kulesza AJ, Titov E, Daly S, Włodarczyk R, Megow J, Saalfrank P, Choi CM, MacAleese L, Antoine R, Dugourd P. Excited States of Xanthene Analogues: Photofragmentation and Calculations by CC2 and Time-Dependent Density Functional Theory. Chemphyschem 2016; 17:3129-3138. [DOI: 10.1002/cphc.201600650] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander Jan Kulesza
- Univ Lyon; Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière; F-69622 Lyon France
| | - Evgenii Titov
- Universität Potsdam, Institut für Chemie; Karl-Liebknecht-Straße 24-25, Haus 25 D-14476 Potsdam Germany
| | - Steven Daly
- Univ Lyon; Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière; F-69622 Lyon France
| | - Radosław Włodarczyk
- Universität Potsdam, Institut für Chemie; Karl-Liebknecht-Straße 24-25, Haus 25 D-14476 Potsdam Germany
| | - Jörg Megow
- Universität Potsdam, Institut für Chemie; Karl-Liebknecht-Straße 24-25, Haus 25 D-14476 Potsdam Germany
| | - Peter Saalfrank
- Universität Potsdam, Institut für Chemie; Karl-Liebknecht-Straße 24-25, Haus 25 D-14476 Potsdam Germany
| | - Chang Min Choi
- Univ Lyon; Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière; F-69622 Lyon France
| | - Luke MacAleese
- Univ Lyon; Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière; F-69622 Lyon France
| | - Rodolphe Antoine
- Univ Lyon; Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière; F-69622 Lyon France
| | - Philippe Dugourd
- Univ Lyon; Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière; F-69622 Lyon France
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