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Smets B, Boschker HTS, Wetherington MT, Lelong G, Hidalgo-Martinez S, Polerecky L, Nuyts G, De Wael K, Meysman FJR. Multi-wavelength Raman microscopy of nickel-based electron transport in cable bacteria. Front Microbiol 2024; 15:1208033. [PMID: 38525072 PMCID: PMC10959288 DOI: 10.3389/fmicb.2024.1208033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 02/26/2024] [Indexed: 03/26/2024] Open
Abstract
Cable bacteria embed a network of conductive protein fibers in their cell envelope that efficiently guides electron transport over distances spanning up to several centimeters. This form of long-distance electron transport is unique in biology and is mediated by a metalloprotein with a sulfur-coordinated nickel (Ni) cofactor. However, the molecular structure of this cofactor remains presently unknown. Here, we applied multi-wavelength Raman microscopy to identify cell compounds linked to the unique cable bacterium physiology, combined with stable isotope labeling, and orientation-dependent and ultralow-frequency Raman microscopy to gain insight into the structure and organization of this novel Ni-cofactor. Raman spectra of native cable bacterium filaments reveal vibrational modes originating from cytochromes, polyphosphate granules, proteins, as well as the Ni-cofactor. After selective extraction of the conductive fiber network from the cell envelope, the Raman spectrum becomes simpler, and primarily retains vibrational modes associated with the Ni-cofactor. These Ni-cofactor modes exhibit intense Raman scattering as well as a strong orientation-dependent response. The signal intensity is particularly elevated when the polarization of incident laser light is parallel to the direction of the conductive fibers. This orientation dependence allows to selectively identify the modes that are associated with the Ni-cofactor. We identified 13 such modes, some of which display strong Raman signals across the entire range of applied wavelengths (405-1,064 nm). Assignment of vibrational modes, supported by stable isotope labeling, suggest that the structure of the Ni-cofactor shares a resemblance with that of nickel bis(1,2-dithiolene) complexes. Overall, our results indicate that cable bacteria have evolved a unique cofactor structure that does not resemble any of the known Ni-cofactors in biology.
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Affiliation(s)
- Bent Smets
- Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Henricus T. S. Boschker
- Department of Biology, University of Antwerp, Antwerp, Belgium
- Department of Biotechnology, Delft University of Technology, Delft, Netherlands
| | - Maxwell T. Wetherington
- Materials Characterization Laboratory, Pennsylvania State University, State College, PA, United States
| | - Gérald Lelong
- Institut de Minéralogie, de Physique des Matériaux et Cosmochimie (IMPMC), Sorbonne Universités, France—Muséum National d’Histoire Naturelle, Paris, France
| | | | - Lubos Polerecky
- Department of Earth Sciences, Utrecht University, Utrecht, Netherlands
| | - Gert Nuyts
- Department of Bioscience Engineering, University of Antwerp, Antwerp, Belgium
- Department of Physics, University of Antwerp, Antwerp, Belgium
| | - Karolien De Wael
- Department of Bioscience Engineering, University of Antwerp, Antwerp, Belgium
| | - Filip J. R. Meysman
- Department of Biology, University of Antwerp, Antwerp, Belgium
- Department of Biotechnology, Delft University of Technology, Delft, Netherlands
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2
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Schlimgen AW, Guo Y, Head-Marsden K. Characterizing Excited States of a Copper-Based Molecular Qubit Candidate with Correlated Electronic Structure Methods. J Phys Chem A 2023; 127:6764-6770. [PMID: 37531508 DOI: 10.1021/acs.jpca.3c03827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Molecular spins have a variety of potential advantages as qubits for quantum computation, such as tunability and well-understood design pathways through organometallic synthesis. Organometallic and heavy-metal-based molecular spin qubits can also exhibit rich electronic structures due to ligand field interactions and electron correlation. These features make consistent and reliable modeling of these species a considerable challenge for contemporary electronic structure techniques. Here, we elucidate the electronic structure of a Cu(II) complex analogous to a recently proposed room-temperature molecular spin qubit. Using active space methods to describe the electron correlation, we show the nuanced interaction between the metal d orbitals and ligand σ and π orbitals makes these systems challenging to model, both in terms of the delocalized spin density and the excited state ordering. We show that predicting the correct spin delocalization requires special consideration of the Cu d orbitals and that the excited state spectrum for the Cu(III) complex also requires the explicit inclusion of the π orbitals in the active space. These interactions are rather common in molecular spin qubit motifs and may play an important role in spin-decoherence processes. Our results may lend insight into future studies of the orbital interactions and electron delocalization of similar complexes.
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Affiliation(s)
- Anthony W Schlimgen
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 61630, United States
| | - Yangyang Guo
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 61630, United States
| | - Kade Head-Marsden
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 61630, United States
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3
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Schallenberg D, Pardemann N, Villinger A, Seidel WW. Synthesis and coordination behaviour of 1 H-1,2,3-triazole-4,5-dithiolates. Dalton Trans 2022; 51:13681-13691. [PMID: 36000523 DOI: 10.1039/d2dt00410k] [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 preparative access to and first group 10 metal complexes of novel 1H-1,2,3-triazole-4,5-dithiolate ligands (tazdt2-) are reported. A set of S-protected 1H-1,2,3-triazole-4,5-dithiol derivatives with R1 = 2,6-dimethylphenyl (Xy) or benzyl (Bn) at N1 and with R2 = Bn or trimethylsilylethyl (TMS-ethyl) at both S atoms were synthesized by a 1,3-dipolar cycloaddition catalysed by either Ru(II) or Cu(I). Extensive investigations on the removal of the protective groups resulted the reductive removal of benzyl groups to be superior in isolating the free 4,5-dithiols of R1N3C2(SH)2 with R1 = Xy (H2-8) or Bn (H2-9). Coordination of these ligands led to the formation of the metal complexes [(η5-C5H5)2Ti(8)], [Ni(dppe)(8)], [Ni(dppe)(9)], [Pd(dppe)(9)] {dppe = bis(diphenylphosphanyl)ethane} and homoleptic (NBu4)n[Ni(8)2] (n = 1, 2). All complexes were fully characterized including structure determination by single crystal XRD. The electronic properties of the Ni and Pd complexes were determined by cyclic voltammetry, UV/vis and EPR spectroscopy supported by DFT calculations. According to the spectral and electrochemical data, the tazdt2- complexes resemble the corresponding benzene-1,2-dithiolate (bdt2-) type compounds reflecting the restricted influence of the electron-withdrawing N3 moiety in the backbone. DSC-TGA measurements with [(η5-C5H5)2Ti(8)] and [Ni(dppe)(8)] indicate a well-defined thermal process involving simultaneous elimination of both N2 and CS.
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Affiliation(s)
- David Schallenberg
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany.
| | - Nils Pardemann
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany.
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany.
| | - Wolfram W Seidel
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany. .,Leibniz Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
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4
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Efficient long-range conduction in cable bacteria through nickel protein wires. Nat Commun 2021; 12:3996. [PMID: 34183682 PMCID: PMC8238962 DOI: 10.1038/s41467-021-24312-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 06/09/2021] [Indexed: 02/06/2023] Open
Abstract
Filamentous cable bacteria display long-range electron transport, generating electrical currents over centimeter distances through a highly ordered network of fibers embedded in their cell envelope. The conductivity of these periplasmic wires is exceptionally high for a biological material, but their chemical structure and underlying electron transport mechanism remain unresolved. Here, we combine high-resolution microscopy, spectroscopy, and chemical imaging on individual cable bacterium filaments to demonstrate that the periplasmic wires consist of a conductive protein core surrounded by an insulating protein shell layer. The core proteins contain a sulfur-ligated nickel cofactor, and conductivity decreases when nickel is oxidized or selectively removed. The involvement of nickel as the active metal in biological conduction is remarkable, and suggests a hitherto unknown form of electron transport that enables efficient conduction in centimeter-long protein structures.
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5
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Henfling S, Kultaeva A, Pöppl A, Klose J, Kersting B, Domasevitch KV, Krautscheid H. Proton and Electron Transfer in the Formation of a Copper Dithiolene-Based Coordination Polymer. Inorg Chem 2021; 60:9008-9018. [PMID: 34077201 DOI: 10.1021/acs.inorgchem.1c00914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal bis(dithiolene) complexes are promising building blocks for electrically conductive coordination polymers. N-Heterocyclic dithiolene complexes allow their cross-linking via the coordination of N-donor atoms to additional transition metal ions. In this study, we present the formal copper(II) and copper(III) 6,7-quinoxalinedithiolene complexes [Cu(qdt)2]- and [Cu(qdt)2]2- (qdt2-: 6,7-quinoxalinedithiolate), as well as the 2D coordination polymer Cu[Cu(Hqdt)(qdt)] (3). The dithiolene complexes were isolated as (Bu4N)2[Cu(qdt)2] (1), Na[Cu(qdt)2]·4H2O (2a), [Na(acetone)4][Cu(qdt)2] (2b), and [Ni(MeOH)6][Cu(qdt)2]2·2H2O (2c). Their crystal structures reveal nearly planar complexes with a high tendency of π-stacking. For a better understanding of their coordination behavior, the electronic properties are investigated by UV-vis-NIR spectroscopy, cyclic voltammetry, and DFT simulations. The synthesis of the 2D coordination polymer 3 involves the reduction and protonation of the monoanionic copper(III) complex. A combination of powder X-ray diffraction, magnetic susceptibility measurements, as well as IR and EPR spectroscopy confirm that formal [CuII(Hqdt)(qdt)]- units link trigonal planar copper(I) atoms to a dense 2D coordination polymer. The electrical conductivity of 3 at room temperature is 2 × 10-7 S/cm. Temperature dependent conductivity measurements confirm the semiconducting behavior of 3 with an Arrhenius derived activation energy of 0.33 eV. The strong absorption of 3 in the visible and NIR regions of the spectrum is caused by the small optical band gap of Eg,opt = 0.65 eV, determined by diffuse reflectance spectroscopy. This study sheds light on the coordination chemistry of N-heterocyclic dithiolene complexes and may serve as a reference for the future design and synthesis of dithiolene-based coordination polymers with interesting electrical and magnetic properties.
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Affiliation(s)
- Stefan Henfling
- Institute for Inorganic Chemistry, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
| | - Anastasia Kultaeva
- Felix Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstraße 5, D-04103 Leipzig, Germany.,Faculty of Chemistry and Biochemistry, Ruhr University Bochum, D-44801 Bochum, Germany
| | - Andreas Pöppl
- Felix Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstraße 5, D-04103 Leipzig, Germany
| | - Jennifer Klose
- Institute for Inorganic Chemistry, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
| | - Berthold Kersting
- Institute for Inorganic Chemistry, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
| | - Kostiantyn V Domasevitch
- Department of Inorganic Chemistry, University of Kiev, Volodimirska Street 64, UA-25033 Kiev, Ukraine
| | - Harald Krautscheid
- Institute for Inorganic Chemistry, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
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6
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Kawamura A, Xie J, Boyn JN, Jesse KA, McNeece AJ, Hill EA, Collins KA, Valdez-Moreira JA, Filatov AS, Kurutz JW, Mazziotti DA, Anderson JS. Reversible Switching of Organic Diradical Character via Iron-Based Spin-Crossover. J Am Chem Soc 2020; 142:17670-17680. [PMID: 32948091 DOI: 10.1021/jacs.0c08307] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Airi Kawamura
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Jiaze Xie
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Jan-Niklas Boyn
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Kate A. Jesse
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Andrew J. McNeece
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Ethan A. Hill
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Kelsey A. Collins
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | | | - Alexander S. Filatov
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Josh W. Kurutz
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - David A. Mazziotti
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - John S. Anderson
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
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7
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Wittmar J, Meyer S, Sieling T, Kunte J, Smiatek J, Brand I. What Does Ectoine Do to DNA? A Molecular-Scale Picture of Compatible Solute-Biopolymer Interactions. J Phys Chem B 2020; 124:7999-8011. [PMID: 32816487 DOI: 10.1021/acs.jpcb.0c05273] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Compatible solutes accumulate in the cytoplasm of halophilic microorganisms, enabling their survival in a high-salinity environment. Ectoine is such a compatible solute. It is a zwitterionic molecule that strongly interacts with surrounding water molecules and changes the dynamics of the local hydration shell. Ectoine interacts with biomolecules such as lipids, proteins, and DNA. The molecular interaction between ectoine and biomolecules, in particular the interaction between ectoine and DNA, is far from being understood. In this paper, we describe molecular aspects of the interaction between ectoine and double-stranded DNA (dsDNA). Two 20 base pairs-long dsDNA fragments were immobilized on a gold surface via a thiol-tether. The interaction between the dsDNA monolayers with diluted and concentrated ectoine solutions was examined by means of X-ray photoelectron and polarization modulation infrared reflection absorption spectroscopies (PM IRRAS). Experimental results indicate that the ability of ectoine to bind water reduces the strength of hydrogen bonds formed to the ribose-phosphate backbone in the dsDNA. In diluted (0.1 M) ectoine solution, DNA interacts predominantly with water molecules. The sugar-phosphate backbone is involved in the formation of strong hydrogen bonds to water, which, over time, leads to a reorientation of the planes of nucleic acid bases. This reorientation destabilizes the strength of hydrogen bonds between the bases and leads to a partial dehybridization of the dsDNA. In concentrated ectoine solution (2.5 M), almost all water molecules interact with ectoine. Under this condition, ectoine is able to interact directly with DNA. Density functional theory (DFT) calculations demonstrate that the direct interaction involves the nitrogen atoms in ectoine and phosphate groups in the DNA molecule. The results of the quantum-chemical calculations show that rearrangements in the ribose-phosphate backbone, caused by a direct interaction with ectoine, facilitates contacts between the O atom in the phosphate group and H atoms in a nucleic acid base. In the PM IRRA spectra, an increase in the number of IR absorption modes in the base pair frequency region proves that the hydrogen bonds between bases become weaker. Thus, a sequence of reorientations caused by interaction with ectoine leads to a breakdown of hydrogen bonds between bases in the double helix.
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Affiliation(s)
- Julia Wittmar
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, 26111 Oldenburg, Germany
| | - Susann Meyer
- Biodeterioration and Reference Organisms, Bundesanstalt für Materialforschung und -prüfung BAM, 12205 Berlin, Germany
| | - Thorben Sieling
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, 26111 Oldenburg, Germany
| | - Jörg Kunte
- Biodeterioration and Reference Organisms, Bundesanstalt für Materialforschung und -prüfung BAM, 12205 Berlin, Germany
| | - Jens Smiatek
- Institute for Computational Physics, University of Stuttgart, D-70569 Stuttgart, Germany
| | - Izabella Brand
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, 26111 Oldenburg, Germany
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8
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Neese F, Wennmohs F, Becker U, Riplinger C. The ORCA quantum chemistry program package. J Chem Phys 2020; 152:224108. [DOI: 10.1063/5.0004608] [Citation(s) in RCA: 697] [Impact Index Per Article: 174.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Frank Neese
- Max Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, D-45470 Mülheim an der Ruhr, Germany
- FAccTs GmbH, Rolandstr. 67, 50677 Köln, Germany
| | - Frank Wennmohs
- Max Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Ute Becker
- Max Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, D-45470 Mülheim an der Ruhr, Germany
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9
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Credendino L, Sproules S. Modulating Iron Spin States with Radical Ligands: A Density Functional Theoretical Study. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Stephen Sproules
- WestCHEM School of ChemistryUniversity of Glasgow Glasgow G12 8QQ UK
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10
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DFT studies on the structure and stability of tetraaza macrocyclic nickel(II) complexes containing dicarbinolamine ligand moiety. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1688-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Fu B, Hsu LY. Photoinduced anomalous Coulomb blockade and the role of triplet states in electron transport through an irradiated molecular transistor. II. Effects of electron-phonon coupling and vibrational relaxation. J Chem Phys 2019. [DOI: 10.1063/1.5112095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Bo Fu
- Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60201, USA
| | - Liang-Yan Hsu
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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12
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Schwarze B, Sobottka S, Schiewe R, Sarkar B, Hey-Hawkins E. Spectroscopic and Electronic Properties of Molybdacarborane Complexes with Non-innocently Acting Ligands. Chemistry 2019; 25:8550-8559. [PMID: 31002195 DOI: 10.1002/chem.201900504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Indexed: 11/12/2022]
Abstract
The molybdacarboranes [3-{L-κ2 N,N}-3-(CO)2 -closo-3,1,2-MoC2 B9 H11 ] (L=2,2'-bipyridine (2,2'-bpy, 1 a) or 1,10-phenanthroline (1,10-phen, 1 b)) incorporating well-known potentially non-innocent ligands (CO, 2,2'-bpy, 1,10-phen) and the "non-spectator" nido-carborane ([η5 -C2 B9 H11 ]2- ) ligand were prepared and fully characterised. High-resolution mass spectrometry, single-crystal X-ray diffraction methods, spectroscopy (IR, (resonance) Raman, NMR), cyclic voltammetry and spectroelectrochemistry (electrochemical properties) were supported by theoretical investigations of the electronic structure (DFT, CAS-SCF, TD-DFT).
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Affiliation(s)
- Benedikt Schwarze
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Sebastian Sobottka
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Robert Schiewe
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Evamarie Hey-Hawkins
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
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13
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Kusamoto T, Nishihara H. Zero-, one- and two-dimensional bis(dithiolato)metal complexes with unique physical and chemical properties. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Majumder M, Misra A. Strategic design of thiophene-fused nickel dithiolene derivatives for efficient NLO response. Phys Chem Chem Phys 2018; 20:19007-19016. [DOI: 10.1039/c8cp01592a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The zwitterionic donor–acceptor group significantly reduces the HOMO–LUMO energy gap resulting in an enormous increase in the first hyperpolarizability values.
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Affiliation(s)
- Manoj Majumder
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | - Anirban Misra
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
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15
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Schlimgen AW, Mazziotti DA. Static and Dynamic Electron Correlation in the Ligand Noninnocent Oxidation of Nickel Dithiolates. J Phys Chem A 2017; 121:9377-9384. [DOI: 10.1021/acs.jpca.7b09567] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Anthony W. Schlimgen
- Department of Chemistry and
the James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - David A. Mazziotti
- Department of Chemistry and
the James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
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16
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Uzelac EJ, Rasmussen SC. Thiophene‐Extended Nickel Thiazoledithiolene: π‐Extended Fused‐Ring Metal Dithiolenes with Stabilized Frontier Orbitals. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eric J. Uzelac
- Department of Chemistry and Biochemistry North Dakota State University NDSU Dept. 2735 P. O. Box 6050 58108‐6050 Fargo ND USA
| | - Seth C. Rasmussen
- Department of Chemistry and Biochemistry North Dakota State University NDSU Dept. 2735 P. O. Box 6050 58108‐6050 Fargo ND USA
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17
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First-Principles Simulation of Raman Spectra of Adsorbates on Metal Surfaces. Chempluschem 2017; 82:924-932. [DOI: 10.1002/cplu.201700167] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/01/2017] [Indexed: 11/07/2022]
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18
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Chatterjee T, Molnar B, Theophall GG, Lee WZ, Lakshmi KV, Ravikanth M. Calixsmaragdyrin: A Versatile Ligand for Coordination Complexes. Inorg Chem 2017; 56:3763-3772. [PMID: 28333456 DOI: 10.1021/acs.inorgchem.6b02225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Ru(II) and BF2 complexes of calixsmaragdyrin were prepared under simple reaction conditions and characterized by HR-MS, 1D and 2D NMR spectroscopy, optical spectroscopy, and electrochemistry, and the structure of the Ru(II) complex of calixsmaragdyrin was elucidated by X-ray crystallography. The crystal structure of the Ru(II) complex revealed that the Ru(II) ion is hexacoordinate with the three pyrrole nitrogen ligands from the tripyrrin unit of the calixsmaragdyrin macrocycle, and the remaining coordination sites of Ru(II) ion were occupied by two carbonyl groups and one hydroxyl (-OH) group. The calixsmaragdyrin macrocycle in the Ru(II) complex was distorted with a dome-like structure. In the BF2 complex of calixsmaragdyrin, the BF2 unit was bound to two pyrrolic nitrogens of the dipyrrin moiety of calixsmaragdyrin as deduced by detailed 1- and 2-dimensional NMR spectroscopy studies. The Ru(II) complex displayed a strong Soret-like absorption band at 449 nm with the absence of Q-bands, whereas the BF2 complex showed a Soret-like band at 475 nm with two well-defined Q-bands at 787 and 883 nm, respectively. Quantum mechanical DFT calculations yielded relaxed equilibrium structures that were similar to the X-ray crystal structures, and the related charge density distributions indicated that the d orbital of the Ru(II) ion was contributing to the HOMO and LUMO states. In addition, TD-DFT calculations successfully reproduced the large bathochromic shifts, oscillator strengths, and electronic transitions that were observed in the experimental absorption spectra of all three complexes. Both the Ru(II) and the BF2 complexes of calixsmaragdyrin were stable under redox conditions.
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Affiliation(s)
- Tamal Chatterjee
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India
| | - Brian Molnar
- Department of Chemistry and Chemical Biology and The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - G G Theophall
- Department of Chemistry and Chemical Biology and The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Way-Zen Lee
- Instrumentation Center, Department of Chemistry, National Taiwan Normal University , 88 Section 4 Ting-Chow Road, Taipei 11677, Taiwan
| | - K V Lakshmi
- Department of Chemistry and Chemical Biology and The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Mangalampalli Ravikanth
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India
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19
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Slater JW, Marguet SC, Cirino SL, Maugeri PT, Shafaat HS. Experimental and DFT Investigations Reveal the Influence of the Outer Coordination Sphere on the Vibrational Spectra of Nickel-Substituted Rubredoxin, a Model Hydrogenase Enzyme. Inorg Chem 2017; 56:3926-3938. [PMID: 28323426 DOI: 10.1021/acs.inorgchem.6b02934] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nickel-substituted rubredoxin (NiRd) is a functional enzyme mimic of hydrogenase, highly active for electrocatalytic and solution-phase hydrogen generation. Spectroscopic methods can provide valuable insight into the catalytic mechanism, provided the appropriate technique is used. In this study, we have employed multiwavelength resonance Raman spectroscopy coupled with DFT calculations on an extended active-site model of NiRd to probe the electronic and geometric structures of the resting state of this system. Excellent agreement between experiment and theory is observed, allowing normal mode assignments to be made on the basis of frequency and intensity analyses. Both metal-ligand and ligand-centered vibrational modes are enhanced in the resonance Raman spectra. The latter provide information about the hydrogen bonding network and structural distortions due to perturbations in the secondary coordination sphere. To reproduce the resonance enhancement patterns seen for high-frequency vibrational modes, the secondary coordination sphere must be included in the computational model. The structure and reduction potential of the NiIIIRd state have also been investigated both experimentally and computationally. This work begins to establish a foundation for computational resonance Raman spectroscopy to serve in a predictive fashion for investigating catalytic intermediates of NiRd.
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Affiliation(s)
- Jeffrey W Slater
- The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Sean C Marguet
- The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Sabrina L Cirino
- The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Pearson T Maugeri
- The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Hannah S Shafaat
- The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
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20
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SANKARAN ANURADHA, PADMA MALAR EJ, VIJAYARAGHAVAN VENKATAPURAMRAMANUJAM. Study of behaviour of Ni(III) macrocyclic complexes in acidic aqueous medium through kinetic measurement involving hydrogen peroxide oxidation and DFT calculations. J CHEM SCI 2017. [DOI: 10.1007/s12039-017-1222-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Amb CM, Heth CL, Evenson SJ, Pokhodnya KI, Rasmussen SC. Thiophene-Fused Nickel Dithiolenes: A Synthetic Scaffold for Highly Delocalized π-Electron Systems. Inorg Chem 2016; 55:10978-10989. [DOI: 10.1021/acs.inorgchem.6b01513] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chad M. Amb
- Department of Chemistry and Biochemistry, North Dakota State University, Department 2735, P.O. Box 6050, Fargo, North Dakota 58108, United States
| | - Christopher L. Heth
- Department of Chemistry and Biochemistry, North Dakota State University, Department 2735, P.O. Box 6050, Fargo, North Dakota 58108, United States
| | - Sean J. Evenson
- Department of Chemistry and Biochemistry, North Dakota State University, Department 2735, P.O. Box 6050, Fargo, North Dakota 58108, United States
| | - Konstantin I. Pokhodnya
- Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, North Dakota 58102, United States
| | - Seth C. Rasmussen
- Department of Chemistry and Biochemistry, North Dakota State University, Department 2735, P.O. Box 6050, Fargo, North Dakota 58108, United States
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22
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Witte M, Grimm-Lebsanft B, Goos A, Binder S, Rübhausen M, Bernard M, Neuba A, Gorelsky S, Gerstmann U, Henkel G, Gero Schmidt W, Herres-Pawlis S. Optical response of the Cu2 S2 diamond core in Cu2II(NGuaS)2 Cl2. J Comput Chem 2016; 37:2181-92. [PMID: 27362786 DOI: 10.1002/jcc.24439] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 06/10/2016] [Accepted: 06/13/2016] [Indexed: 01/25/2023]
Abstract
Density functional theory (DFT) and time-dependent DFT calculations are presented for the dicopper thiolate complex Cu2 (NGuaS)2 Cl2 [NGuaS=2-(1,1,3,3-tetramethylguanidino) benzenethiolate] with a special focus on the bonding mechanism of the Cu2 S2 Cl2 core and the spectroscopic response. This complex is relevant for the understanding of dicopper redox centers, for example, the CuA center. Its UV/Vis absorption is theoretically studied and found to be similar to other structural CuA models. The spectrum can be roughly divided in the known regions of metal d-d absorptions and metal to ligand charge transfer regions. Nevertheless the chloride ions play an important role as electron donors, with the thiolate groups as electron acceptors. The bonding mechanism is dissected by means of charge decomposition analysis which reveals the large covalency of the Cu2 S2 diamond core mediated between Cu dz2 and S-S π and π* orbitals forming Cu-S σ bonds. Measured resonant Raman spectra are shown for 360- and 720-nm excitation wavelength and interpreted using the calculated vibrational eigenmodes and frequencies. The calculations help to rationalize the varying resonant behavior at different optical excitations. Especially the phenylene rings are only resonant for 720 nm. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Matthias Witte
- Lehrstuhl Für Bioanorganische Chemie, Fachgruppe Chemie, RWTH Aachen University, Landoltweg 1, Aachen, 52074, Germany
| | - Benjamin Grimm-Lebsanft
- Institut für Nanostruktur- und Festkörperphysik and Center for Free Electron Laser Science, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Arne Goos
- Institut für Nanostruktur- und Festkörperphysik and Center for Free Electron Laser Science, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Stephan Binder
- Institut für Nanostruktur- und Festkörperphysik and Center for Free Electron Laser Science, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Michael Rübhausen
- Institut für Nanostruktur- und Festkörperphysik and Center for Free Electron Laser Science, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Martin Bernard
- Lehrstuhl Für Anorganische Chemie, Universität Paderborn, Warburger Str. 100, Paderborn, 33098, Germany
| | - Adam Neuba
- Lehrstuhl Für Anorganische Chemie, Universität Paderborn, Warburger Str. 100, Paderborn, 33098, Germany
| | - Serge Gorelsky
- Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Uwe Gerstmann
- Lehrstuhl Für Theoretische Physik, Universität Paderborn, Warburger Str. 100, Paderborn, 33098, Germany
| | - Gerald Henkel
- Lehrstuhl Für Anorganische Chemie, Universität Paderborn, Warburger Str. 100, Paderborn, 33098, Germany
| | - Wolf Gero Schmidt
- Lehrstuhl Für Theoretische Physik, Universität Paderborn, Warburger Str. 100, Paderborn, 33098, Germany
| | - Sonja Herres-Pawlis
- Lehrstuhl Für Bioanorganische Chemie, Fachgruppe Chemie, RWTH Aachen University, Landoltweg 1, Aachen, 52074, Germany
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23
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Murata M, Kaji S, Nishimura H, Wakamiya A, Murata Y. Efficient Synthesis of One- and Two-Dimensional Multimetallic Gold-Bis(dithiolene) Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600595] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michihisa Murata
- Institute for Chemical Research; Kyoto University; Uji 611-0011 Kyoto Japan
| | - Shoji Kaji
- Institute for Chemical Research; Kyoto University; Uji 611-0011 Kyoto Japan
| | - Hidetaka Nishimura
- Institute for Chemical Research; Kyoto University; Uji 611-0011 Kyoto Japan
| | - Atsushi Wakamiya
- Institute for Chemical Research; Kyoto University; Uji 611-0011 Kyoto Japan
| | - Yasujiro Murata
- Institute for Chemical Research; Kyoto University; Uji 611-0011 Kyoto Japan
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24
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Mohammadpour M, Jamshidi Z. Comparative assessment of density functional methods for evaluating essential parameters to simulate SERS spectra within the excited state energy gradient approximation. J Chem Phys 2016; 144:194302. [DOI: 10.1063/1.4948813] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Skara G, Gimferrer M, De Proft F, Salvador P, Pinter B. Scrutinizing the Noninnocence of Quinone Ligands in Ruthenium Complexes: Insights from Structural, Electronic, Energy, and Effective Oxidation State Analyses. Inorg Chem 2016; 55:2185-99. [DOI: 10.1021/acs.inorgchem.5b02543] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Gabriella Skara
- Eenheid Algemene Chemie (ALGC), Member
of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Marti Gimferrer
- Institut de Química
Computacional i Catàlisi (IQCC) i Department de Química, Universitat de Girona, 17071 Girona, Spain
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC), Member
of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Pedro Salvador
- Institut de Química
Computacional i Catàlisi (IQCC) i Department de Química, Universitat de Girona, 17071 Girona, Spain
| | - Balazs Pinter
- Eenheid Algemene Chemie (ALGC), Member
of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
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26
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Petrenko T, Rauhut G. Time-independent eigenstate-free calculation of vibronic spectra beyond the harmonic approximation. J Chem Phys 2015; 143:234106. [DOI: 10.1063/1.4937380] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Taras Petrenko
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Guntram Rauhut
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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27
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Kinetic measurements and quantum chemical calculations on low spin Ni(II)/(III) macrocyclic complexes in aqueous and sulphato medium. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0883-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Jurss JW, Khnayzer RS, Panetier JA, El Roz KA, Nichols EM, Head-Gordon M, Long JR, Castellano FN, Chang CJ. Bioinspired design of redox-active ligands for multielectron catalysis: effects of positioning pyrazine reservoirs on cobalt for electro- and photocatalytic generation of hydrogen from water. Chem Sci 2015; 6:4954-4972. [PMID: 29142725 PMCID: PMC5664355 DOI: 10.1039/c5sc01414j] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 06/09/2015] [Indexed: 01/18/2023] Open
Abstract
Mononuclear metalloenzymes in nature can function in cooperation with precisely positioned redox-active organic cofactors in order to carry out multielectron catalysis. Inspired by the finely tuned redox management of these bioinorganic systems, we present the design, synthesis, and experimental and theoretical characterization of a homologous series of cobalt complexes bearing redox-active pyrazines. These donor moieties are locked into key positions within a pentadentate ligand scaffold in order to evaluate the effects of positioning redox non-innocent ligands on hydrogen evolution catalysis. Both metal- and ligand-centered redox features are observed in organic as well as aqueous solutions over a range of pH values, and comparison with analogs bearing redox-inactive zinc(ii) allows for assignments of ligand-based redox events. Varying the geometric placement of redox non-innocent pyrazine donors on isostructural pentadentate ligand platforms results in marked effects on observed cobalt-catalyzed proton reduction activity. Electrocatalytic hydrogen evolution from weak acids in acetonitrile solution, under diffusion-limited conditions, reveals that the pyrazine donor of axial isomer 1-Co behaves as an unproductive electron sink, resulting in high overpotentials for proton reduction, whereas the equatorial pyrazine isomer complex 2-Co is significantly more active for hydrogen generation at lower voltages. Addition of a second equatorial pyrazine in complex 3-Co further minimizes overpotentials required for catalysis. The equatorial derivative 2-Co is also superior to its axial 1-Co congener for electrocatalytic and visible-light photocatalytic hydrogen generation in biologically relevant, neutral pH aqueous media. Density functional theory calculations (B3LYP-D2) indicate that the first reduction of catalyst isomers 1-Co, 2-Co, and 3-Co is largely metal-centered while the second reduction occurs at pyrazine. Taken together, the data establish that proper positioning of non-innocent pyrazine ligands on a single cobalt center is indeed critical for promoting efficient hydrogen catalysis in aqueous media, akin to optimally positioned redox-active cofactors in metalloenzymes. In a broader sense, these findings highlight the significance of electronic structure considerations in the design of effective electron-hole reservoirs for multielectron transformations.
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Affiliation(s)
- Jonah W Jurss
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Department of Chemistry and Biochemistry , University of Mississippi , University , MS 38677 , USA
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Rony S Khnayzer
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
- Department of Natural Sciences , Lebanese American University , Beirut 1102-2801 , Chouran , Lebanon
| | - Julien A Panetier
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Karim A El Roz
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
| | - Eva M Nichols
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Martin Head-Gordon
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Jeffrey R Long
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Felix N Castellano
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
| | - Christopher J Chang
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Department of Molecular and Cell Biology , University of California , Berkeley , California 94720 , USA
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
- Howard Hughes Medical Institute , University of California , Berkeley , California 94720 , USA
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29
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Skara G, Pinter B, Geerlings P, De Proft F. Revealing the thermodynamic driving force for ligand-based reductions in quinoids; conceptual rules for designing redox active and non-innocent ligands. Chem Sci 2015; 6:4109-4117. [PMID: 29218177 PMCID: PMC5707504 DOI: 10.1039/c5sc01140j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 04/30/2015] [Indexed: 12/18/2022] Open
Abstract
Metal and ligand-based reductions have been modeled in octahedral ruthenium complexes revealing metal-ligand interactions as the profound driving force for the redox-active behaviour of orthoquinoid-type ligands. Through an extensive investigation of redox-active ligands we revealed the most critical factors that facilitate or suppress redox-activity of ligands in metal complexes, from which basic rules for designing non-innocent/redox-active ligands can be put forward. These rules also allow rational redox-leveling, i.e. the moderation of redox potentials of ligand-centred electron transfer processes, potentially leading to catalysts with low overpotential in multielectron activation processes.
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Affiliation(s)
- G Skara
- Eenheid Algemene Chemie (ALGC) , Vrije Universiteit Brussel (VUB) , Pleinlaan 2 , 1050 , Brussels , Belgium .
| | - B Pinter
- Eenheid Algemene Chemie (ALGC) , Vrije Universiteit Brussel (VUB) , Pleinlaan 2 , 1050 , Brussels , Belgium .
| | - P Geerlings
- Eenheid Algemene Chemie (ALGC) , Vrije Universiteit Brussel (VUB) , Pleinlaan 2 , 1050 , Brussels , Belgium .
| | - F De Proft
- Eenheid Algemene Chemie (ALGC) , Vrije Universiteit Brussel (VUB) , Pleinlaan 2 , 1050 , Brussels , Belgium .
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30
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Theoretical study of nonlinear optical properties of cobalt bis (dicarbollide) derivatives: the effect of substituents. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1658-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Kozhukh J, Minier MA, Lippard SJ. Synthesis and characterization of mononuclear, pseudotetrahedral cobalt(III) compounds. Inorg Chem 2015; 54:418-24. [PMID: 25531129 PMCID: PMC4303325 DOI: 10.1021/ic5009279] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Indexed: 11/30/2022]
Abstract
The preparation and characterization of two mononuclear cobalt(III) tropocoronand complexes, [Co(TC-5,5)](BF4) and [Co(TC-6,6)](BPh4), are reported. The cobalt(III) centers exist in rare pseudotetrahedral conformations, with twist angles of 65° and 74° for the [Co(TC-5,5](+) and [Co(TC-6,6)](+) species, respectively. Structural and electrochemical characteristics are compared with those of newly synthesized [Ga(TC-5,5)](GaCl4) and [Ga(TC-6,6)](GaCl4) analogues. The spin state of the pseudotetrahedral [Co(TC-6,6)](BPh4) compound was determined to be S = 2, a change in spin state from the value of S = 1 that occurs in the square-planar and distorted square-planar complexes, [Co(TC-3,3)](X) (X = BPh4, BAr'4) and [Co(TC-4,4)](BPh4), respectively.
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Affiliation(s)
- Julia Kozhukh
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mikael A. Minier
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen J. Lippard
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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32
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Marsh BM, Zhou J, Garand E. Charge transfer in MOH(H2O)+ (M = Mn, Fe, Co, Ni, Cu, Zn) complexes revealed by vibrational spectroscopy of mass-selected ions. Phys Chem Chem Phys 2015; 17:25786-92. [DOI: 10.1039/c5cp01522g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydroxide frequency in MOH(H2O)+ is a sensitive probe of charge transfer.
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Affiliation(s)
- Brett M. Marsh
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Jia Zhou
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Etienne Garand
- Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
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33
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Letko CS, Panetier JA, Head-Gordon M, Tilley TD. Mechanism of the Electrocatalytic Reduction of Protons with Diaryldithiolene Cobalt Complexes. J Am Chem Soc 2014; 136:9364-76. [DOI: 10.1021/ja5019755] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher S. Letko
- Joint Center
for Artificial Photosynthesis, †Materials Sciences Division and ‡Chemical Sciences
Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
| | - Julien A. Panetier
- Joint Center
for Artificial Photosynthesis, †Materials Sciences Division and ‡Chemical Sciences
Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
| | - Martin Head-Gordon
- Joint Center
for Artificial Photosynthesis, †Materials Sciences Division and ‡Chemical Sciences
Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
| | - T. Don Tilley
- Joint Center
for Artificial Photosynthesis, †Materials Sciences Division and ‡Chemical Sciences
Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
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34
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35
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Cui J, Xu Z. An electroactive porous network from covalent metal–dithiolene links. Chem Commun (Camb) 2014; 50:3986-8. [DOI: 10.1039/c4cc00408f] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Direct reaction between a hexathiol and PtCl2 leads to the formation of a covalent metal–organic framework (CMOF) featuring substantial porosity, redox activity and ion exchange capability.
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Affiliation(s)
- Jieshun Cui
- Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon, China
| | - Zhengtao Xu
- Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon, China
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36
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Kubo T, Matsumoto K, Nishizawa M, Hirao Y, Kurata H. Synthesis and Characterization of Nickel Complex of 4-Amino-3-pyridinethiolate. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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38
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Affiliation(s)
- Manabu Abe
- Department of Chemistry, Graduate School of Science, Hiroshima University (HIRODAI), 1-3-1 Kagamiyama, Higashi-Hiroshima,
Hiroshima 739-8526, Japan
- Institute for Molecular Science (IMS), Okazaki, Aichi 444-8787,
Japan
- JST-CREST, 5
Sanbancho,
Chiyodaku, Tokyo 102-0075, Japan
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39
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Zhou S, You B, Yao Q, Chen M, Wang Y, Li W. DFT studies of structure and vibrational spectra of 4-benzylidene-1-phenyl-2-selenomorpholino-1H-imidazol-5(4H)-one and its derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 110:333-342. [PMID: 23583851 DOI: 10.1016/j.saa.2013.03.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 03/14/2013] [Accepted: 03/16/2013] [Indexed: 06/02/2023]
Abstract
The Raman spectra and FT-IR spectra of 4-benzylidene-1-phenyl-2-selenomorpholino-1H-imidazol-5(4H)-one and its derivatives have been measured and their ground-state geometries and vibrational spectra are studied by DFT at B3LYP/6-31G(d) level. Comparing the optimized geometries of compounds 1-6, we find that different substituent and substitution site on benzene rings result in very small changes on the imidazoline skeleton, the changes on bond length are within 0.005 Å and on bond angle are within 0.5°. Calculated spectra are well consistent with the experimental one and the deviations are smaller than 30 cm-1. The influence of substituent on IR and Raman spectrum must not be neglected. Electron-withdrawing chlorine atom makes the stretching vibration of carbonyl group shift 4-16 cm(-1) towards higher wavenumber, but electron-donating methoxyl group and dioxole group make it shift 6-10 cm(-1) in IR and 9-13 cm(-1) in Raman spectrum towards lower wavenumber, respectively. Dioxole substitution makes the C=C stretching vibration of phenyl shift to a higher position at 1617-1618 cm(-1). The influence of intermolecular weak interaction on vibrational spectrum is studied by two models (dimer and monomer inclusion van del Waals correction). Dimer model presents a better accuracy, but van del Waals correction on B3LYP hybrid function does not produce a significant change on accuracy in this system.
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Affiliation(s)
- Shuli Zhou
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
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40
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Roemelt M, Neese F. Excited States of Large Open-Shell Molecules: An Efficient, General, and Spin-Adapted Approach Based on a Restricted Open-Shell Ground State Wave function. J Phys Chem A 2013; 117:3069-83. [DOI: 10.1021/jp3126126] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Michael Roemelt
- Max Planck Institut für Chemische Energiekonversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
| | - Frank Neese
- Max Planck Institut für Chemische Energiekonversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
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41
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Dang L, Shibl MF, Yang X, Harrison DJ, Alak A, Lough AJ, Fekl U, Brothers EN, Hall MB. Apparent Anti-Woodward–Hoffmann Addition to a Nickel Bis(dithiolene) Complex: The Reaction Mechanism Involves Reduced, Dimetallic Intermediates. Inorg Chem 2013; 52:3711-23. [DOI: 10.1021/ic302236u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li Dang
- Department of Chemistry, Texas A&M University, College Station, Texas, U.S.A
| | | | - Xinzheng Yang
- Department of Chemistry, Texas A&M University, College Station, Texas, U.S.A
| | - Daniel J. Harrison
- Department of Chemical and Physical
Sciences, University of Toronto, Mississauga,
Ontario, Canada L5L 1C6
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
| | - Aiman Alak
- Department of Chemical and Physical
Sciences, University of Toronto, Mississauga,
Ontario, Canada L5L 1C6
| | - Alan J. Lough
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
| | - Ulrich Fekl
- Department of Chemical and Physical
Sciences, University of Toronto, Mississauga,
Ontario, Canada L5L 1C6
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
| | | | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas, U.S.A
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Williams VA, Hulley EB, Wolczanski PT, Lancaster KM, Lobkovsky EB. Exploring the limits of redox non-innocence: pseudo square planar [{κ4-Me2C(CH2NCHpy)2}Ni]n (n = 2+, 1+, 0, −1, −2) favor Ni(ii). Chem Sci 2013. [DOI: 10.1039/c3sc50743b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Petrenko T, Neese F. Efficient and automatic calculation of optical band shapes and resonance Raman spectra for larger molecules within the independent mode displaced harmonic oscillator model. J Chem Phys 2012; 137:234107. [DOI: 10.1063/1.4771959] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Shafaat HS, Weber K, Petrenko T, Neese F, Lubitz W. Key Hydride Vibrational Modes in [NiFe] Hydrogenase Model Compounds Studied by Resonance Raman Spectroscopy and Density Functional Calculations. Inorg Chem 2012; 51:11787-97. [DOI: 10.1021/ic3017276] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hannah S. Shafaat
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
| | - Katharina Weber
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
| | - Taras Petrenko
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
| | - Wolfgang Lubitz
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim
an der Ruhr, Germany
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Koley MK, Sivasubramanian SC, Biswas S, Manoharan PT, Koley AP. Dioxygen binding and activation by a highly reactive Cr(II) compound containing S,N-donors derived from o-aminothiophenol. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.714867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Manjuri K. Koley
- a Department of Chemical Engineering , Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus , Zuarinagar 403726 , Goa , India
| | - Seshadri C. Sivasubramanian
- b Department of Chemistry , Birla Institute of Technology and Science-Pilani, Pilani Campus , Pilani 333031 , Rajasthan , India
| | - Sumit Biswas
- c Department of Biological Sciences , Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus , Goa 403726 , India
| | | | - Aditya P. Koley
- e Department of Chemistry , Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus , Zuarinagar 403726 , Goa , India
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46
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Frazier BA, Wolczanski PT, Keresztes I, DeBeer S, Lobkovsky EB, Pierpont AW, Cundari TR. Synthetic approaches to (smif)2Ti (smif = 1,3-di-(2-pyridyl)-2-azaallyl) reveal redox non-innocence and C-C bond-formation. Inorg Chem 2012; 51:8177-86. [PMID: 22830452 DOI: 10.1021/ic300590t] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Attempted syntheses of (smif)(2)Ti (smif =1,3-di-(2-pyridyl)-2-azaallyl) based on metatheses of TiCl(n)L(m) (n = 2-4) with M(smif) (M = Li, Na), in the presence of a reducing agent (Na/Hg) when necessary, failed, but several apparent Ti(II) species were identified by X-ray crystallography and multidimensional NMR spectroscopy: (smif){Li(smif-smif)}Ti (1, X-ray), [(smif)Ti](2)(μ-κ(3),κ(3)-N,N(py)(2)-smif,smif) (2), (smif)Ti(κ(3)-N,N(py)(2)-smif,(smif)H) (3), and (smif)Ti(dpma) (4, dpma = di-2-pyridylmethyl-amide). NMR spectroscopy and K-edge XAS showed that each compound possesses ligands that are redox noninnnocent, such that d(1) Ti(III) centers AF-couple to ligand radicals: (smif){Li(smif-smif)(2-)}Ti(III) (1), [(smif(2-))Ti(III)](2)(μ-κ(3),κ(3)-N,N(py)(2)-smif,smif) (2), [(smif(2-))Ti(III)](κ(3)-N,N(py)(2)-smif,(smif)H) (3), and (smif(2-))Ti(III)(dpma) (4). The instability of (smif)(2)Ti relative to its C-C coupled dimer, 2, is rationalized via the complementary nature of the amide and smif radical dianion ligands, which are also common to 3 and 4. Calculations support this contention.
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Affiliation(s)
- Brenda A Frazier
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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47
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Wächtler M, Guthmuller J, González L, Dietzek B. Analysis and characterization of coordination compounds by resonance Raman spectroscopy. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.004] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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Xia JL, Man WY, Zhu X, Zhang C, Jin GJ, Schauer PA, Fox MA, Yin J, Yu GA, Low PJ, Liu SH. Synthesis and Characterization of Dithia[3.3]paracyclophane-Bridged Binuclear Ruthenium Vinyl and Alkynyl Complexes. Organometallics 2012. [DOI: 10.1021/om300338j] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jian-Long Xia
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
| | - Wing Y. Man
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Xinxun Zhu
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
| | - Chan Zhang
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
| | - Guo-Jun Jin
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
| | - Phil A. Schauer
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Mark A. Fox
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Jun Yin
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
| | - Guang-Ao Yu
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
| | - Paul J. Low
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Sheng Hua Liu
- Key Laboratory
of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s
Republic of China
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Espa D, Pilia L, Marchiò L, Artizzu F, Serpe A, Mercuri ML, Simão D, Almeida M, Pizzotti M, Tessore F, Deplano P. Mixed-ligand Pt(ii) dithione-dithiolato complexes: influence of the dicyanobenzodithiolato ligand on the second-order NLO properties. Dalton Trans 2012; 41:3485-93. [DOI: 10.1039/c2dt11956k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Dang L, Yang X, Zhou J, Brothers EN, Hall MB. Computational Studies on Ethylene Addition to Nickel Bis(dithiolene). J Phys Chem A 2011; 116:476-82. [DOI: 10.1021/jp205971b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Li Dang
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
| | - Xinzheng Yang
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
| | - Jia Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
| | | | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
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