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Jäger P, Brendle K, Schneider E, Kohaut S, Armbruster MK, Fink K, Weis P, Kappes MM. Photodissociation of Free Metalloporphyrin Dimer Multianions. J Phys Chem A 2018; 122:2974-2982. [PMID: 29490134 DOI: 10.1021/acs.jpca.8b00641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patrick Jäger
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3630, 76021 Karlsruhe, Germany
| | - Katrina Brendle
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Erik Schneider
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Stephan Kohaut
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3630, 76021 Karlsruhe, Germany
| | - Markus K. Armbruster
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3630, 76021 Karlsruhe, Germany
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3630, 76021 Karlsruhe, Germany
| | - Patrick Weis
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Manfred M. Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3630, 76021 Karlsruhe, Germany
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
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2
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Xu S, Smith JET, Weber JM. Hydration of a Binding Site with Restricted Solvent Access: Solvatochromic Shift of the Electronic Spectrum of a Ruthenium Polypyridine Complex, One Molecule at a Time. J Phys Chem A 2016; 120:7650-7658. [PMID: 27627894 DOI: 10.1021/acs.jpca.6b07668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the electronic spectra of mass selected [(bpy)(tpy)Ru-OH2]2+·(H2O)n clusters (bpy = 2,2'-bipyridine, tpy =2,2':6'2″-terpyridine, n = 0-4) in the spectral region of their metal-to-ligand charge transfer bands. The spectra of the mono- and dihydrate clusters exhibit partially resolved individual electronic transitions. The water network forming at the aqua ligand leads to a rapid solvatochromic shift of the peak of the band envelope: addition of only four solvent water molecules can recover 78% of the solvatochromic shift in bulk solution. The sequential shift of the band shows a clear change in behavior with the closing of the first hydration shell. We compare our experimental data to density function theory (DFT) calculations for the ground and excited states.
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Affiliation(s)
- Shuang Xu
- JILA and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States
| | - James E T Smith
- JILA and Department of Chemistry and Biochemistry, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States
| | - J Mathias Weber
- JILA and Department of Chemistry and Biochemistry, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States
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3
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Daly S, Girod M, Vojkovic M, Giuliani A, Antoine R, Nahon L, O'Hair RAJ, Dugourd P. Single-Photon, Double Photodetachment of Nickel Phthalocyanine Tetrasulfonic Acid 4- Anions. J Phys Chem Lett 2016; 7:2586-2590. [PMID: 27327376 DOI: 10.1021/acs.jpclett.6b01030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Single-photon, two-electron photodetachment from nickel phthalocyanine tetrasulfonic acid tetra anions, [NiPc](4-), was examined in the gas-phase using a linear ion trap coupled to the DESIRS VUV beamline of the SOLEIL Synchrotron. This system was chosen since it has a low detachment energy, known charge localization, and well-defined geometrical and electronic structures. A threshold for two-electron loss is observed at 10.2 eV, around 1 eV lower than previously observed double detachment thresholds on multiple charged protein anions. The photodetachment energy of [NiPc](4-) has been previously determined to be 3.5 eV and the photodetachment energy of [NiPc](3-•) is determined in this work to be 4.3 eV. The observed single photon double electron detachment threshold is hence 5.9 eV higher than the energy required for sequential single electron loss. Possible mechanisms are for double photodetachment are discussed. These observations pave the way toward new, exciting experiments for probing double photodetachment at relatively low energies, including correlation measurements on emitted photoelectrons.
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Affiliation(s)
- Steven Daly
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| | - Marion Girod
- Institut des Sciences Analytiques, Université de Lyon, Université Claude Bernard Lyon 1, CNRS & ENS Lyon, UMR 5280 , 69100 Villeurbanne, France
| | - Marin Vojkovic
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| | - Alexandre Giuliani
- SOLEIL, l'Orme des Merisiers, St Aubin, BP48, F-91192 Gif sur Yvette Cedex, France
- INRA, UAR1008 Caractérisation et Élaboration des Produits Issus de l'Agriculture, F-44316 Nantes, France
| | - Rodolphe Antoine
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| | - Laurent Nahon
- SOLEIL, l'Orme des Merisiers, St Aubin, BP48, F-91192 Gif sur Yvette Cedex, France
| | | | - Philippe Dugourd
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
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4
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Jäger P, Brendle K, Schwarz U, Himmelsbach M, Armbruster MK, Fink K, Weis P, Kappes MM. Q and Soret Band Photoexcitation of Isolated Palladium Porphyrin Tetraanions Leads to Delayed Emission of Nonthermal Electrons over Microsecond Time Scales. J Phys Chem Lett 2016; 7:1167-72. [PMID: 26963821 DOI: 10.1021/acs.jpclett.6b00407] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We have used both action and photoelectron spectroscopy to study the response of isolated Pd(II) meso-tetra(4-sulfonatophenyl)porphyrin tetraanions ([PdTPPS](4-)) to electronic excitation over the 2.22-2.98 eV photon energy range. The action spectrum obtained by recording the wavelength-dependent intensity of charged decay products closely resembles the absorption spectrum of PdTPPS in aqueous solution (which shows pronounced Q and Soret absorption bands). The two main decay channels observed are sulfonate group loss and, predominantly, electron emission. To better understand the electron emission channel, we have also acquired photoelectron spectra at multiple detachment photon energies covering the range probed in action spectroscopy. Upon both Q and Soret band excitation, we find that electrons are emitted in three characteristic kinetic energy ranges. The corresponding detachment processes are identified as (delayed) tunneling emission from both excited singlet and triplet states (each of which is accessed by/after one-photon absorption) as well as resonant two-photon detachment. The first triplet state lifetime of isolated [PdTPPS](4-) is significantly longer than 10 μs, possibly on the 100 μs time scale. We estimate that more than 50% of the electron emission observed upon photoexcitation occurs by way of this triplet state.
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Affiliation(s)
- Patrick Jäger
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , Postfach 3630, 76021 Karlsruhe, Germany
| | - Katrina Brendle
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Ulrike Schwarz
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Miriam Himmelsbach
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Markus K Armbruster
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , Postfach 3630, 76021 Karlsruhe, Germany
| | - Patrick Weis
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , Postfach 3630, 76021 Karlsruhe, Germany
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
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5
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Xu S, Weber JM. Absorption Spectrum of a Ru(II)-Aquo Complex in Vacuo: Resolving Individual Charge-Transfer Transitions. J Phys Chem A 2015; 119:11509-13. [DOI: 10.1021/acs.jpca.5b10488] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Shuang Xu
- JILA, University of Colorado, 440 UCB, Boulder, Colorado 80309, United States
- Department
of Physics, University of Colorado, Boulder, Colorado 80309, United States
| | - J. Mathias Weber
- JILA, University of Colorado, 440 UCB, Boulder, Colorado 80309, United States
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
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6
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DiTucci MJ, Heiles S, Williams ER. Role of Water in Stabilizing Ferricyanide Trianion and Ion-Induced Effects to the Hydrogen-Bonding Water Network at Long Distance. J Am Chem Soc 2015; 137:1650-7. [DOI: 10.1021/ja5119545] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew J. DiTucci
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Sven Heiles
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
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7
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Schinle F, Jacob CR, Wolk AB, Greisch JF, Vonderach M, Weis P, Hampe O, Johnson MA, Kappes MM. Ion mobility spectrometry, infrared dissociation spectroscopy, and ab initio computations toward structural characterization of the deprotonated leucine-enkephalin peptide anion in the gas phase. J Phys Chem A 2014; 118:8453-63. [PMID: 24884600 DOI: 10.1021/jp501772d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although the sequencing of protonated proteins and peptides with tandem mass spectrometry has blossomed into a powerful means of characterizing the proteome, much less effort has been directed at their deprotonated analogues, which can offer complementary sequence information. We present a unified approach to characterize the structure and intermolecular interactions present in the gas-phase pentapeptide leucine-enkephalin anion by several vibrational spectroscopy schemes as well as by ion-mobility spectrometry, all of which are analyzed with the help of quantum-chemical computations. The picture emerging from this study is that deprotonation takes place at the C terminus. In this configuration, the excess charge is stabilized by strong intramolecular hydrogen bonds to two backbone amide groups and thus provides a detailed picture of a potentially common charge accommodation motif in peptide anions.
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Affiliation(s)
- Florian Schinle
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , 76021 Karlsruhe, Germany
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Kaufman SH, Weber JM, Pernpointner M. Electronic structure and UV spectrum of hexachloroplatinate dianions in vacuo. J Chem Phys 2013; 139:194310. [DOI: 10.1063/1.4830407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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9
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Schinle F, Crider PE, Vonderach M, Weis P, Hampe O, Kappes MM. Spectroscopic and theoretical investigations of adenosine 5'-diphosphate and adenosine 5'-triphosphate dianions in the gas phase. Phys Chem Chem Phys 2013; 15:6640-50. [PMID: 23258289 DOI: 10.1039/c2cp43808a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doubly deprotonated adenosine 5'-diphosphate ([ADP-2H](2-)) and adenosine 5'-triphosphate ([ATP-2H](2-)) dianions were investigated using infrared multiple photon dissociation (IR-MPD) and photoelectron spectroscopy. Vibrational spectra acquired in the X-H stretch region (X = C, N, O) and augmented by isotope-labelling were compared to density functional theory (DFT) calculations at the B3LYP/TZVPP level. This suggests that in [ATP-2H](2-) the two phosphate groups adjacent to the ribose ring are preferentially deprotonated. Photoelectron spectra recorded at 4.66 and 6.42 eV photon energies revealed adiabatic detachment energies of 1.35 eV for [ADP-2H](2-) and 3.35 eV for [ATP-2H](2-). Repulsive Coulomb barriers were estimated at ~2.2 eV for [ADP-2H](2-) and ~1.9 eV for [ATP-2H](2-). Time-dependent DFT calculations have been used to simulate the photoelectron spectra. Photodetachment occurs primarily from lone pair orbitals on oxygen atoms within the phosphate chain.
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Affiliation(s)
- Florian Schinle
- Institut für Physikalische Chemie, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
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10
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Röhr MIS, Petersen J, Brunet C, Antoine R, Broyer M, Dugourd P, Bonačić-Koutecký V, O'Hair RAJ, Mitrić R. Synthesis and Spectroscopic Characterization of Diphenylargentate, [(C6H5)2Ag](.). J Phys Chem Lett 2012; 3:1197-1201. [PMID: 26288055 DOI: 10.1021/jz300280f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present the structural and optical properties of the isolated diphenylargentate anion, which has been synthesized by multistage mass spectrometry in a quadrupole ion trap. The experimental photodetachment spectrum has been obtained by action spectroscopy. Comparison with quantum chemical calculations of the electronic absorption spectrum allows for a precise characterization of the spectroscopic features, showing that in the low-energy regime, the optical properties of diphenylargentate bear a significant resemblance to those of atomic silver.
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Affiliation(s)
- M I S Röhr
- †Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | - J Petersen
- ‡Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - C Brunet
- §Université Lyon 1, CNRS, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne cedex, France
| | - R Antoine
- §Université Lyon 1, CNRS, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne cedex, France
| | - M Broyer
- §Université Lyon 1, CNRS, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne cedex, France
| | - P Dugourd
- §Université Lyon 1, CNRS, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne cedex, France
| | - V Bonačić-Koutecký
- †Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
- ⊥Interdisciplinary Center for Advanced Science and Technology, University of Split, Meštrovićevo Šetalište 45, HR-21000 Split, Croatia
| | - R A J O'Hair
- #School of Chemistry, Bio21 Institute of Molecular Science and Biotechnology, ARC Centre of Excellence in Free Radical Chemistry and Biotechnology, The University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - R Mitrić
- ‡Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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Aravind G, Klærke B, Rajput J, Toker Y, Andersen LH, Bochenkova AV, Antoine R, Lemoine J, Racaud A, Dugourd P. Photodissociation pathways and lifetimes of protonated peptides and their dimers. J Chem Phys 2012; 136:014307. [PMID: 22239781 DOI: 10.1063/1.3671943] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photodissociation lifetimes and fragment channels of gas-phase, protonated YA(n) (n = 1,2) peptides and their dimers were measured with 266 nm photons. The protonated monomers were found to have a fast dissociation channel with an exponential lifetime of ~200 ns while the protonated dimers show an additional slow dissociation component with a lifetime of ~2 μs. Laser power dependence measurements enabled us to ascribe the fast channel in the monomer and the slow channel in the dimer to a one-photon process, whereas the fast dimer channel is from a two-photon process. The slow (1 photon) dissociation channel in the dimer was found to result in cleavage of the H-bonds after energy transfer through these H-bonds. In general, the dissociation of these protonated peptides is non-prompt and the decay time was found to increase with the size of the peptides. Quantum RRKM calculations of the microcanonical rate constants also confirmed a statistical nature of the photodissociation processes in the dipeptide monomers and dimers. The classical RRKM expression gives a rate constant as an analytical function of the number of active vibrational modes in the system, estimated separately on the basis of the equipartition theorem. It demonstrates encouraging results in predicting fragmentation lifetimes of protonated peptides. Finally, we present the first experimental evidence for a photo-induced conversion of tyrosine-containing peptides into monocyclic aromatic hydrocarbon along with a formamide molecule both found in space.
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Affiliation(s)
- G Aravind
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
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12
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Antoine R, Dugourd P. Visible and ultraviolet spectroscopy of gas phase protein ions. Phys Chem Chem Phys 2011; 13:16494-509. [PMID: 21811728 DOI: 10.1039/c1cp21531k] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Optical spectroscopy has contributed enormously to our knowledge of the structure and dynamics of atoms and molecules and is now emerging as a cornerstone of the gas phase methods available for investigating biomolecular ions. This article focuses on the UV and visible spectroscopy of peptide and protein ions stored in ion traps, with emphasis placed on recent results obtained on protein polyanions, by electron photodetachment experiments. We show that among a large number of possible de-excitation pathways, the relaxation of biomolecular polyanions is mainly achieved by electron emission following photo-excitation in electronically excited states. Electron photodetachment is a fast process that occurs prior to relaxation on vibrational degrees of freedom. Electron photodetachment yield can then be used to record gas phase action spectra for systems as large as entire proteins, without the limitation of system size that would arise from energy redistribution on numerous modes and prevent fragmentation after the absorption of a photon. The optical activity of proteins in the near UV is directly related to the electronic structure and optical absorption of aromatic amino acids (Trp, Phe and Tyr). UV spectra for peptides and proteins containing neutral, deprotonated and radical aromatic amino acids were recorded. They displayed strong bathochromic shifts. In particular, the results outline the privileged role played by open shell ions in molecular spectroscopy which, in the case of biomolecules, is directly related to their reactivity and biological functions. The optical shifts observed are sufficient to provide unambiguous fingerprints of the electronic structure of chromophores without the requirement of theoretical calculations. They constitute benchmarks for calculating the absorption spectra of chromophores embedded in entire proteins and could be used in the future to study biochemical processes in the gas phase involving charge transfer in aromatic amino acids, such as in the mediation of electron transfer or redox reactions. We then addressed the important question of the sensitivity of protein optical spectra to the intrinsic properties of protein ions, including conformation, charge state, etc., and to environmental factors. We report optical spectra for different charge states of insulin, for ubiquitin starting from native and denaturated solutions, and for apo-myoglobin protein. All these spectra are compared critically to spectra recorded in solution, in order to assess solvent effects. We also report the spectra of peptides complexed with metal cations and show that complexation gives rise to new optical transitions related to charge transfer types of excitation. The perspectives of this work include integrative approaches where UV-Vis spectroscopy could, for example, be combined with ion mobility spectrometry and high level calculations for protein structural characterization. It could also be used in spectroscopy to probe biological processes in the gas phase, with different light sources including VUV radiation (to probe different types of excitations) and ultra short pulses with time and phase modulation (to probe and control the dynamics of de-excitation or charge transfer events), and with the derivatization of proteins with chromophores to modulate their optical properties. We also envision that photo-excitation will play an important role in the future to produce intermediates with new chemical and reactive properties. Another promising route is to conduct activated electron photodetachment dissociation experiments.
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Wyer JA, Nielsen SB. Absorption in the Q-band region by isolated ferric heme+ and heme+(histidine) in vacuo. J Chem Phys 2010; 133:084306. [DOI: 10.1063/1.3474998] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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14
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Wang XB, Sergeeva AP, Xing XP, Massaouti M, Karpuschkin T, Hampe O, Boldyrev AI, Kappes MM, Wang LS. Probing the Electronic Stability of Multiply Charged Anions: Sulfonated Pyrene Tri- and Tetraanions. J Am Chem Soc 2009; 131:9836-42. [DOI: 10.1021/ja903615g] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xue-Bin Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Alina P. Sergeeva
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Xiao-Peng Xing
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Maria Massaouti
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Tatjana Karpuschkin
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Oliver Hampe
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Alexander I. Boldyrev
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Manfred M. Kappes
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Lai-Sheng Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
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15
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Rensing C, Ehrler OT, Yang JP, Unterreiner AN, Kappes MM. Photodissociation dynamics of IrBr62− dianions by time-resolved photoelectron spectroscopy. J Chem Phys 2009; 130:234306. [DOI: 10.1063/1.3148377] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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Aravind G, Lammich L, Andersen LH. Dissociation lifetime studies of doubly deprotonated angiotensin peptides. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:011908. [PMID: 19257070 DOI: 10.1103/physreve.79.011908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2008] [Indexed: 05/27/2023]
Abstract
The doubly deprotonated [Asn,Val5] angiopeptide, in the gas phase, was irradiated with 266 nm photons. The time of flight (TOF) of the products formed following photoabsorption, namely, the monoanion and neutral fragments, was recorded with submicrosecond time resolution. Monte Carlo simulations of the TOF of the neutral fragments indicate that the dissociation occurs faster than 100 ns. A similar experiment performed on the Val5 angiopeptide also yielded a dissociation time shorter than 100 ns. We suggest dissociation mechanisms that account for the different number of photons required for the release of CO2.
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Affiliation(s)
- G Aravind
- Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
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Matheis K, Joly L, Antoine R, Lépine F, Bordas C, Ehrler OT, Allouche AR, Kappes MM, Dugourd P. Photoelectron Spectroscopy of Gramicidin Polyanions: Competition between Delayed and Direct Emission. J Am Chem Soc 2008; 130:15903-6. [DOI: 10.1021/ja803758w] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katerina Matheis
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Laure Joly
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Rodolphe Antoine
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Franck Lépine
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Christian Bordas
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Oli T. Ehrler
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Abdul-Rahman Allouche
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Manfred M. Kappes
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Philippe Dugourd
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
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Joly L, Antoine R, Broyer M, Lemoine J, Dugourd P. Electron Photodetachment from Gas Phase Peptide Dianions. Relation with Optical Absorption Properties. J Phys Chem A 2008; 112:898-903. [DOI: 10.1021/jp0752365] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Laure Joly
- Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bât. A. Kastler, 43 Bvd. du 11 novembre 1918, 69622 Villeurbanne, France, and Université de Lyon, Université Lyon 1, CNRS, Sciences Analytiques, UMR 5180, 43 Bvd. du 11 Novembre 1918, 69622 Villeurbanne cedex, France
| | - Rodolphe Antoine
- Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bât. A. Kastler, 43 Bvd. du 11 novembre 1918, 69622 Villeurbanne, France, and Université de Lyon, Université Lyon 1, CNRS, Sciences Analytiques, UMR 5180, 43 Bvd. du 11 Novembre 1918, 69622 Villeurbanne cedex, France
| | - Michel Broyer
- Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bât. A. Kastler, 43 Bvd. du 11 novembre 1918, 69622 Villeurbanne, France, and Université de Lyon, Université Lyon 1, CNRS, Sciences Analytiques, UMR 5180, 43 Bvd. du 11 Novembre 1918, 69622 Villeurbanne cedex, France
| | - Jérôme Lemoine
- Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bât. A. Kastler, 43 Bvd. du 11 novembre 1918, 69622 Villeurbanne, France, and Université de Lyon, Université Lyon 1, CNRS, Sciences Analytiques, UMR 5180, 43 Bvd. du 11 Novembre 1918, 69622 Villeurbanne cedex, France
| | - Philippe Dugourd
- Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bât. A. Kastler, 43 Bvd. du 11 novembre 1918, 69622 Villeurbanne, France, and Université de Lyon, Université Lyon 1, CNRS, Sciences Analytiques, UMR 5180, 43 Bvd. du 11 Novembre 1918, 69622 Villeurbanne cedex, France
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Ehrler OT, Yang JP, Sugiharto AB, Unterreiner AN, Kappes MM. Excited state dynamics of metastable phthalocyanine-tetrasulfonate tetra-anions probed by pump/probe photoelectron spectroscopy. J Chem Phys 2007; 127:184301. [DOI: 10.1063/1.2780842] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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Joly L, Antoine R, Allouche AR, Broyer M, Lemoine J, Dugourd P. Ultraviolet spectroscopy of peptide and protein polyanions in vacuo: signature of the ionization state of tyrosine. J Am Chem Soc 2007; 129:8428-9. [PMID: 17579418 DOI: 10.1021/ja072818r] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Laure Joly
- Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bât. A. Kastler, France
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Gabelica V, Rosu F, Tabarin T, Kinet C, Antoine R, Broyer M, De Pauw E, Dugourd P. Base-dependent electron photodetachment from negatively charged DNA strands upon 260-nm laser irradiation. J Am Chem Soc 2007; 129:4706-13. [PMID: 17378565 DOI: 10.1021/ja068440z] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
DNA multiply charged anions stored in a quadrupole ion trap undergo one-photon electron ejection (oxidation) when subjected to laser irradiation at 260 nm (4.77 eV). Electron photodetachment is likely a fast process, given that photodetachment is able to compete with internal conversion or radiative relaxation to the ground state. The DNA [6-mer]3- ions studied here show a marked sequence dependence of electron photodetachment yield. Remarkably, the photodetachment yield (dG6 > dA6 > dC6 > dT6) is inversely correlated with the base ionization potentials (G < A < C < T). Sequences with guanine runs show increased photodetachment yield as the number of guanine increases, in line with the fact that positive holes are the most stable in guanine runs. This correlation between photodetachment yield and the stability of the base radical may be explained by tunneling of the electron through the repulsive Coulomb barrier. Theoretical calculations on dinucleotide monophosphates show that the HOMO and HOMO-1 orbitals are localized on the bases. The wavelength dependence of electron detachment yield was studied for dG63-. Maximum electron photodetachment is observed in the wavelength range corresponding to base absorption (260-270 nm). This demonstrates the feasibility of gas-phase UV spectroscopy on large DNA anions. The calculations and the wavelength dependence suggest that the electron photodetachment is initiated at the bases and not at the phosphates. This also indicates that, although direct photodetachment could also occur, autodetachment from excited states, presumably corresponding to base excitation, is the dominant process at 260 nm. Excited-state dynamics of large DNA strands still remains largely unexplored, and photo-oxidation studies on trapped DNA multiply charged anions can help in bridging the gap between gas-phase studies on isolated bases or base pairs and solution-phase studies on full DNA strands.
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Affiliation(s)
- Valérie Gabelica
- Laboratoire de Spectrométrie de Masse, Université de Liège, Institut de Chimie Bat B6c, B-4000 Liège, Belgium.
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Waters T, Wang XB, Wang LS. Electrospray ionization photoelectron spectroscopy: Probing the electronic structure of inorganic metal complexes in the gas-phase. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.04.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Löffler D, Weber JM, Kappes MM. Photodetachment spectroscopy of PtBr42−: Probing the Coulomb barrier of a doubly charged anion. J Chem Phys 2005; 123:224308. [PMID: 16375477 DOI: 10.1063/1.2135769] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
We probe the repulsive Coulomb barrier of the doubly charged anion PtBr(4) (2-) by photodetachment spectroscopy. The results are discussed in terms of models for the photoemission process, the excitation spectrum of PtBr(4) (2-), and calculations of the energy-dependent tunneling probability for various model potentials.
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Affiliation(s)
- D Löffler
- Institut für Physikalische Chemie, Universität Karlsruhe, D-76128 Karlsruhe, Germany
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Neumaier M, Hampe O, Kappes MM. Electron transfer collisions between isolated fullerene dianions and SF6. J Chem Phys 2005; 123:074318. [PMID: 16229581 DOI: 10.1063/1.2008259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Electron transfer collisions of trapped doubly charged fullerene anions C76(2-), C(78)2-, and C84(2-) with SF6 are studied in a Fourier transform ion cyclotron resonance mass spectrometer at center-of-mass collisional energies ranging from thermal energy to 77 eV. Collision energy dependencies manifest threshold energies for (nominally exoergic) single electron transfer onto SF6 of 1.46+/-0.3 eV, 1.56+/-0.3 eV, and 1.63+/-0.3 eV for C(76)2-, C78(2-), and C(84)2-, respectively. Kinetics studies reveal charge-transfer cross sections of up to 430+/-200 A2 for C84(2-) at a collision energy of 77 eV. The mechanism and the energetics are discussed in terms of classical electrostatic model calculations. Additionally, we rationalize the collision energy dependencies of the charge-transfer cross sections using the two-state Landau-Zener formalism to describe the associated resonant electron tunneling probability.
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Affiliation(s)
- Marco Neumaier
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany
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