1
|
Wang H, Huang SD, Yan L, Hu MY, Zhao J, Alp EE, Yoda Y, Petersen CM, Thompson MK. Europium-151 and iron-57 nuclear resonant vibrational spectroscopy of naturally abundant KEu(III)Fe(II)(CN) 6 and Eu(III)Fe(III)(CN) 6 complexes. Dalton Trans 2022; 51:17753-17761. [PMID: 36346270 PMCID: PMC9933908 DOI: 10.1039/d2dt02600g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have performed and analyzed the first combined 151Eu and 57Fe nuclear resonant vibrational spectroscopy (NRVS) for naturally abundant KEu(III)[Fe(II)(CN)6] and Eu(III)[Fe(III)(CN)6] complexes. Comparison of the observed 151Eu vs.57Fe NRVS spectroscopic features confirms that Eu(III) in both KEu(III)[Fe(II)(CN)6] and Eu(III)[Fe(III)(CN)6] occupies a position outside the [Fe(CN)6] core and coordinates to the N atoms of the CN- ions, whereas Fe(III) or Fe(II) occupies the site inside the [Fe(CN)6]4- core and coordinates to the C atoms of the CN- ions. In addition to the spectroscopic interest, the results from this study provide invaluable insights for the design and evaluation of the nanoparticles of such complexes as potential cellular contrast agents for their use in magnetic resonance imaging. The combined 151Eu and 57Fe NRVS measurements are also among the first few explorations of bi-isotopic NRVS experiments.
Collapse
Affiliation(s)
| | - Songping D Huang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA.
| | - Lifen Yan
- SETI Institute, Mountain View, CA 94043, USA.
| | - Michael Y Hu
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Ercan E Alp
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Yoshitaka Yoda
- Precision Spectroscopy Division, SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan
| | - Courtney M Petersen
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Matthew K Thompson
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| |
Collapse
|
2
|
Modrogan C, Cǎprǎrescu S, Dǎncilǎ AM, Orbuleț OD, Grumezescu AM, Purcar V, Radițoiu V, Fierascu RC. Modified Composite Based on Magnetite and Polyvinyl Alcohol: Synthesis, Characterization, and Degradation Studies of the Methyl Orange Dye from Synthetic Wastewater. Polymers (Basel) 2021; 13:polym13223911. [PMID: 34833210 PMCID: PMC8625922 DOI: 10.3390/polym13223911] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/06/2021] [Accepted: 11/10/2021] [Indexed: 11/16/2022] Open
Abstract
The goal of the present paper was to synthesize, characterize, and evaluate the performance of the modified composite based on magnetite (Fe3O4) and polyvinyl alcohol (PVA). The obtained composite was used to degrade Methyl Orange dye from synthetic wastewater by a laboratory photocatalytic reactor. Various parameters of the photodegradation process were tested: composite dosage, amount of hydrogen peroxide (H2O2), and pH. The composite was characterized by Fourier Transform Infrared (FTIR) Spectroscopy, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). The degradation experiments indicated that the complete dye decolorization depended on the amount of H2O2. In addition, the H2O2 could accelerate Methyl Orange degradation to more highly oxidized intermediates in the presence of UV light (99.35%). The results suggested that the obtained modified composite could be used to treat wastewater containing various types of dyes.
Collapse
Affiliation(s)
- Cristina Modrogan
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (C.M.); (A.M.D.); (O.D.O.)
| | - Simona Cǎprǎrescu
- Inorganic Chemistry, Physical Chemistry and Electrochemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania
- Correspondence:
| | - Annette Madelene Dǎncilǎ
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (C.M.); (A.M.D.); (O.D.O.)
| | - Oanamari Daniela Orbuleț
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (C.M.); (A.M.D.); (O.D.O.)
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (A.M.G.); (R.C.F.)
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050657 Bucharest, Romania
- Academy of Romanian Scientists, Ilfov No. 3, 50044 Bucharest, Romania
| | - Violeta Purcar
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independentei, No. 202, 060021 Bucharest, Romania; (V.P.); (V.R.)
| | - Valentin Radițoiu
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independentei, No. 202, 060021 Bucharest, Romania; (V.P.); (V.R.)
| | - Radu Claudiu Fierascu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (A.M.G.); (R.C.F.)
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independentei, No. 202, 060021 Bucharest, Romania; (V.P.); (V.R.)
| |
Collapse
|
3
|
Metal Organic Frameworks Derived Fe-N-C Nanostructures as High-Performance Electrodes for Sodium Ion Batteries and Electromagnetic Interference (EMI) Shielding. Molecules 2021; 26:molecules26041018. [PMID: 33671928 PMCID: PMC7919031 DOI: 10.3390/molecules26041018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 01/28/2023] Open
Abstract
Metal organic framework (MOF)-derived carbon nanostructures (MDC) synthesized by either calcinations or carbonization or pyrolysis are emerging as attractive materials for a wide range of applications like batteries, super-capacitors, sensors, water treatment, etc. But the process of transformation of MOFs into MDCs is time-consuming, with reactions requiring inert atmospheres and reaction time typically running into hours. In this manuscript, we report the transformation of 1,4-diazabicyclo[2.2.2]octane, (DABCO)-based MOFs into iron nitride nanoparticles embedded in nitrogen-doped carbon nanotubes by simple, fast and facile microwave pyrolysis. By using graphene oxide and carbon fiber as microwave susceptible surfaces, three-dimensional nitrogen-doped carbon nanotubes vertically grown on reduced graphene oxide (MDNCNT@rGO) and carbon fibers (MDCNT@CF), respectively, were obtained, whose utility as anode material in sodium-ion batteries (MDNCNT@rGO) and for EMI (electromagnetic interference) shielding material (MDCNT@CF) is reported.
Collapse
|
4
|
Meunier A, Singleton ML, Kauffmann B, Granier T, Lautrette G, Ferrand Y, Huc I. Aromatic foldamers as scaffolds for metal second coordination sphere design. Chem Sci 2020; 11:12178-12186. [PMID: 34094430 PMCID: PMC8162952 DOI: 10.1039/d0sc05143h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/11/2020] [Indexed: 11/21/2022] Open
Abstract
As metalloproteins exemplify, the chemical and physical properties of metal centers depend not only on their first but also on their second coordination sphere. Installing arrays of functional groups around the first coordination sphere of synthetic metal complexes is thus highly desirable, but it remains a challenging objective. Here we introduce a novel approach to produce tailored second coordination spheres. We used bioinspired artificial architectures based on aromatic oligoamide foldamers to construct a rigid, modular and well-defined environment around a metal complex. Specifically, aza-aromatic monomers having a tethered [2Fe-2S] cluster have been synthesized and incorporated in conical helical foldamer sequences. Exploiting the modularity and predictability of aromatic oligoamide structures allowed for the straightforward design of a conical architecture able to sequester the metal complex in a confined environment. Even though no direct metal complex-foldamer interactions were purposely designed in this first generation model, crystallography, NMR and IR spectroscopy concurred to show that the aromatic oligoamide backbone alters the structure and fluxional processes of the metal cluster.
Collapse
Affiliation(s)
- Antoine Meunier
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Michael L Singleton
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Université de Bordeaux, CNRS, INSERM, Institut Européen de Chimie et Biologie (UMS 3033) 2 Rue Robert Escarpit 33600 Pessac France
| | - Thierry Granier
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Guillaume Lautrette
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Yann Ferrand
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Ivan Huc
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
- Department of Pharmacy, Centre for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
| |
Collapse
|
5
|
Roy A, Vaughn MD, Tomlin J, Booher GJ, Kodis G, Simmons CR, Allen JP, Ghirlanda G. Enhanced Photocatalytic Hydrogen Production by Hybrid Streptavidin-Diiron Catalysts. Chemistry 2020; 26:6240-6246. [PMID: 32201996 DOI: 10.1002/chem.202000204] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/24/2020] [Indexed: 01/22/2023]
Abstract
Hybrid protein-organometallic catalysts are being explored for selective catalysis of a number of reactions, because they utilize the complementary strengths of proteins and of organometallic complex. Herein, we present an artificial hydrogenase, StrepH2, built by incorporating a biotinylated [Fe-Fe] hydrogenase organometallic mimic within streptavidin. This strategy takes advantage of the remarkable strength and specificity of biotin-streptavidin recognition, which drives quantitative incorporation of the biotinylated diironhexacarbonyl center into streptavidin, as confirmed by UV/Vis spectroscopy and X-ray crystallography. FTIR spectra of StrepH2 show characteristic peaks at shift values indicative of interactions between the catalyst and the protein scaffold. StrepH2 catalyzes proton reduction to hydrogen in aqueous media during photo- and electrocatalysis. Under photocatalytic conditions, the protein-embedded catalyst shows enhanced efficiency and prolonged activity compared to the isolated catalyst. Transient absorption spectroscopy data suggest a mechanism for the observed increase in activity underpinned by an observed longer lifetime for the catalytic species FeI Fe0 when incorporated within streptavidin compared to the biotinylated catalyst in solution.
Collapse
Affiliation(s)
- Anindya Roy
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA.,Present Address: Molecular Engineering and Sciences, Institute for Protein Design, University of Washington, Seattle, WA, 98195-1655, USA
| | - Michael D Vaughn
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - John Tomlin
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Garrett J Booher
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Gerdenis Kodis
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Chad R Simmons
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - James P Allen
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Giovanna Ghirlanda
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| |
Collapse
|
6
|
Donovan ES, Plummer HM, Parada AS, Nichol GS, Felton GA. Pnictogen ligand coordination to an iron-sulfur compound. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.12.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
Eckert PA, Kubarych KJ. Solvent Quality Controls Macromolecular Structural Dynamics of a Dendrimeric Hydrogenase Model. J Phys Chem B 2018; 122:12154-12163. [PMID: 30427195 DOI: 10.1021/acs.jpcb.8b07259] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We report a spectroscopic investigation of the ultrafast dynamics of the second-generation poly(aryl ether) dendritic hydrogenase model using two-dimensional infrared (2D-IR) spectroscopy to probe the metal carbonyl vibrations of the dendrimer and a reference small molecule, [Fe(μ-S)(CO)3]2. We find that the structural dynamics of the dendrimer are reflected in a slow phase of the spectral diffusion, which is absent from [Fe(μ-S)(CO)3]2, and we relate the slow phase to the quality of the solvent for poly(aryl ether) dendrimers. We observe a solvent-dependent modulation of the initial phase of vibrational relaxation of the carbonyl groups, which we attribute to an inhibition of solvent assistance in the intramolecular vibrational redistribution process for the dendrimer. There is also a clear solvent dependence of the vibrational frequencies of both the dendrimer and [Fe(μ-S)(CO)3]2. Our data represent the first 2D-IR study of a dendritic complex and provide insight into the solvent dependence of molecular conformation in solution and the ultrafast dynamics of moderately sized, conformationally mobile compounds.
Collapse
Affiliation(s)
- Peter A Eckert
- Department of Chemistry , University of Michigan , 930 N. University Avenue , Ann Arbor , Michigan 49109 , United States
| | - Kevin J Kubarych
- Department of Chemistry , University of Michigan , 930 N. University Avenue , Ann Arbor , Michigan 49109 , United States
| |
Collapse
|
8
|
The possibility of iron chelation therapy in the presence of different HPOs; a molecular approach to the non-covalent interactions and binding energies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
9
|
Wang S, Aster A, Mirmohades M, Lomoth R, Hammarström L. Structural and Kinetic Studies of Intermediates of a Biomimetic Diiron Proton-Reduction Catalyst. Inorg Chem 2018; 57:768-776. [PMID: 29297686 DOI: 10.1021/acs.inorgchem.7b02687] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One-electron reduction and subsequent protonation of a biomimetic proton-reduction catalyst [FeFe(μ-pdt)(CO)6] (pdt = propanedithiolate), 1, were investigated by UV-vis and IR spectroscopy on a nano- to microsecond time scale. The study aimed to provide further insight into the proton-reduction cycle of this [FeFe]-hydrogenase model complex, which with its prototypical alkyldithiolate-bridged diiron core is widely employed as a molecular, precious metal-free catalyst for sustainable H2 generation. The one-electron-reduced catalyst was obtained transiently by electron transfer from photogenerated [Ru(dmb)3]+ in the absence of proton sources or in the presence of acids (dichloro- or trichloroacetic acid or tosylic acid). The reduced catalyst and its protonation product were observed in real time by UV-vis and IR spectroscopy, leading to their structural characterization and providing kinetic data on the electron and proton transfer reactions. 1 features an intact (μ2,κ2-pdt)(μ-H)Fe2 core in the reduced, 1-, and reduced-protonated states, 1H, in contrast to the Fe-S bond cleavage upon the reduction of [FeFe(bdt)(CO)6], 2, with a benzenedithiolate bridge. The driving-force dependence of the rate constants for the protonation of 1- (kpt = 7.0 × 105, 1.3 × 107, and 7.0 × 107 M-1 s-1 for the three acids used in this study) suggests a reorganization energy >1 eV and indicates that hydride complex 1H is formed by direct protonation of the Fe-Fe bond. The protonation of 1- is sufficiently fast even with the weaker acids, which excludes a rate-limiting role in light-driven H2 formation under typical conditions.
Collapse
Affiliation(s)
- Shihuai Wang
- Department of Chemistry-Ångström Laboratory, Uppsala University , Box 523, SE-751 20 Uppsala, Sweden
| | - Alexander Aster
- Department of Chemistry-Ångström Laboratory, Uppsala University , Box 523, SE-751 20 Uppsala, Sweden
| | - Mohammad Mirmohades
- Department of Chemistry-Ångström Laboratory, Uppsala University , Box 523, SE-751 20 Uppsala, Sweden
| | - Reiner Lomoth
- Department of Chemistry-Ångström Laboratory, Uppsala University , Box 523, SE-751 20 Uppsala, Sweden
| | - Leif Hammarström
- Department of Chemistry-Ångström Laboratory, Uppsala University , Box 523, SE-751 20 Uppsala, Sweden
| |
Collapse
|
10
|
Beltrán TF, Zaragoza G, Delaude L. Small iron-carbonyl clusters bearing imidazolium-2-trithioperoxycarboxylate ligands. Dalton Trans 2017; 46:13002-13009. [PMID: 28936533 DOI: 10.1039/c7dt03202a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of [Fe2(CO)9] with two representative imidazolium-2-dithiocarboxylate zwitterions derived from common N-heterocyclic carbenes (NHCs) bearing mesityl (IMes) or 2,6-diisopropylphenyl substituents on their nitrogen atoms (IDip) unexpectedly afforded two small bimetallic iron-carbonyl clusters with the generic formula [Fe2(CO)6(μ-κ2-S,S'-κ2-S,S'-S3C·NHC)]. After a brief optimization of the reaction conditions, these two "sulfur-enriched" products were isolated in low yields. They were fully characterized by IR, NMR, UV/Visible, and ESI-MS techniques, and their molecular structures were determined by single crystal X-ray diffraction analysis. The two compounds adopted a butterfly-type disposition in the solid state, with an [Fe2(CO)6] core bridged by the trithioperoxycarboxylate moiety of the in situ generated NHC·CS3 ligands. Bond lengths recorded for the CS3- unit revealed that its negative charge was mostly located on the remote sulfur atom.
Collapse
Affiliation(s)
- Tomás F Beltrán
- Laboratory of Organometallic Chemistry and Homogeneous Catalysis, Institut de Chimie (B6a), Allée du six Août 13, Quartier Agora, Université de Liège, 4000 Liège, Belgium.
| | | | | |
Collapse
|
11
|
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.
Collapse
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
| |
Collapse
|
12
|
Eckert PA, Kubarych KJ. Dynamic Flexibility of Hydrogenase Active Site Models Studied with 2D-IR Spectroscopy. J Phys Chem A 2017; 121:608-615. [PMID: 28032999 DOI: 10.1021/acs.jpca.6b11962] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Hydrogenase enzymes enable organisms to use H2 as an energy source, having evolved extremely efficient biological catalysts for the reversible oxidation of molecular hydrogen. Small-molecule mimics of these enzymes provide both simplified models of the catalysis reactions and potential artificial catalysts that might be used to facilitate a hydrogen economy. We have studied two diiron hydrogenase mimics, μ-pdt-[Fe(CO)3]2 and μ-edt-[Fe(CO)3]2 (pdt = propanedithiolate, edt = ethanedithiolate), in a series of alkane solvents and have observed significant ultrafast spectral dynamics using two-dimensional infrared (2D-IR) spectroscopy. Since solvent fluctuations in nonpolar alkanes do not lead to substantial electrostatic modulations in a solute's vibrational mode frequencies, we attribute the spectral diffusion dynamics to intramolecular flexibility. The intramolecular origin is supported by the absence of any measurable solvent viscosity dependence, indicating that the frequency fluctuations are not coupled to the solvent motional dynamics. Quantum chemical calculations reveal a pronounced coupling between the low-frequency torsional rotation of the carbonyl ligands and the terminal CO stretching vibrations. The flexibility of the CO ligands has been proposed to play a central role in the catalytic reaction mechanism, and our results highlight that the CO ligands are highly flexible on a picosecond time scale.
Collapse
Affiliation(s)
- Peter A Eckert
- Department of Chemistry, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Kevin J Kubarych
- Department of Chemistry, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States
| |
Collapse
|
13
|
Said SA, Qadir NU, Mansour RB, Mezghani K, Irshad HM. Synthesis and water sorption properties of a series of exfoliated graphene/MIL-100(Fe) composites. RSC Adv 2017. [DOI: 10.1039/c7ra01091e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene oxide/MIL-100(Fe) composites synthesized using covalent chemistry present an attractive strategy to develop adsorbents with high uptakes as well as heat transfer rates.
Collapse
Affiliation(s)
- S. A. M. Said
- Center of Research Excellence in Renewable Energy
- King Fahd University of Petroleum and Minerals (KFUPM)
- Dhahran 31261
- Kingdom of Saudi Arabia
- KACST-TIC Center of Carbon Capture and Sequestration
| | - N. U. Qadir
- Center of Research Excellence in Renewable Energy
- King Fahd University of Petroleum and Minerals (KFUPM)
- Dhahran 31261
- Kingdom of Saudi Arabia
| | - R. B. Mansour
- KACST-TIC Center of Carbon Capture and Sequestration
- KFUPM
- Dhahran 31261
- Kingdom of Saudi Arabia
- Department of Mechanical Engineering
| | - K. Mezghani
- KACST-TIC Center of Carbon Capture and Sequestration
- KFUPM
- Dhahran 31261
- Kingdom of Saudi Arabia
- Department of Mechanical Engineering
| | - H. M. Irshad
- Department of Mechanical Engineering
- KFUPM
- Dhahran 31261
- Kingdom of Saudi Arabia
| |
Collapse
|
14
|
Hunt A, Barrett J, McCurry M, Works C. Photochemical reactivity of a binuclear Fe(I)–Fe(I) hydrogenase model compound with cyano ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
15
|
Qadir NU, Said SAM, Mansour RB, Mezghani K, Ul-Hamid A. Synthesis, characterization, and water adsorption properties of a novel multi-walled carbon nanotube/MIL-100(Fe) composite. Dalton Trans 2016; 45:15621-15633. [DOI: 10.1039/c6dt02640k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In situ hydrothermal synthesis of MWCNT/MIL-100(Fe) composites can combine all the attributes required of a commercial adsorbent into a single material designed for high-performance adsorption chillers.
Collapse
Affiliation(s)
- Najam U. Qadir
- Center of Research Excellence in Renewable Energy
- King Fahd University of Petroleum and Minerals (KFUPM)
- Dhahran 31261
- Kingdom of Saudi Arabia
| | - Syed A. M. Said
- Center of Research Excellence in Renewable Energy
- King Fahd University of Petroleum and Minerals (KFUPM)
- Dhahran 31261
- Kingdom of Saudi Arabia
- KACST-TIC Center of Carbon Capture and Sequestration
| | - Rached B. Mansour
- Center of Research Excellence in Renewable Energy
- King Fahd University of Petroleum and Minerals (KFUPM)
- Dhahran 31261
- Kingdom of Saudi Arabia
- KACST-TIC Center of Carbon Capture and Sequestration
| | - Khalid Mezghani
- KACST-TIC Center of Carbon Capture and Sequestration
- KFUPM
- Dhahran 31261
- Kingdom of Saudi Arabia
| | - Anwar Ul-Hamid
- Center of Engineering Research
- KFUPM
- Dhahran 31261
- Kingdom of Saudi Arabia
| |
Collapse
|
16
|
Siebert E, Rippers Y, Frielingsdorf S, Fritsch J, Schmidt A, Kalms J, Katz S, Lenz O, Scheerer P, Paasche L, Pelmenschikov V, Kuhlmann U, Mroginski MA, Zebger I, Hildebrandt P. Resonance Raman Spectroscopic Analysis of the [NiFe] Active Site and the Proximal [4Fe-3S] Cluster of an O2-Tolerant Membrane-Bound Hydrogenase in the Crystalline State. J Phys Chem B 2015. [DOI: 10.1021/acs.jpcb.5b04119] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Elisabeth Siebert
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Yvonne Rippers
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Stefan Frielingsdorf
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Johannes Fritsch
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Andrea Schmidt
- Charité − Universitätsmedizin Berlin, Institut für Medizinische Physik und Biophysik (CC2), Group
Protein X-ray Crystallography and Signal Transduction, Charitéplatz 1, D-10117 Berlin, Germany
| | - Jacqueline Kalms
- Charité − Universitätsmedizin Berlin, Institut für Medizinische Physik und Biophysik (CC2), Group
Protein X-ray Crystallography and Signal Transduction, Charitéplatz 1, D-10117 Berlin, Germany
| | - Sagie Katz
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Oliver Lenz
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Patrick Scheerer
- Charité − Universitätsmedizin Berlin, Institut für Medizinische Physik und Biophysik (CC2), Group
Protein X-ray Crystallography and Signal Transduction, Charitéplatz 1, D-10117 Berlin, Germany
| | - Lars Paasche
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Vladimir Pelmenschikov
- Technische
Universität Berlin, Institut für Chemie, Sekr. C7, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Uwe Kuhlmann
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Maria Andrea Mroginski
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Ingo Zebger
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| | - Peter Hildebrandt
- Technische
Universität Berlin, Institut für Chemie, Sekr. PC14, Straße
des 17. Juni 135, D-10623 Berlin, Germany
| |
Collapse
|
17
|
Gilbert-Wilson R, Siebel JF, Adamska-Venkatesh A, Pham CC, Reijerse E, Wang H, Cramer SP, Lubitz W, Rauchfuss TB. Spectroscopic Investigations of [FeFe] Hydrogenase Maturated with [(57)Fe2(adt)(CN)2(CO)4](2-). J Am Chem Soc 2015; 137:8998-9005. [PMID: 26091969 DOI: 10.1021/jacs.5b03270] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation and spectroscopic characterization of a CO-inhibited [FeFe] hydrogenase with a selectively (57)Fe-labeled binuclear subsite is described. The precursor [(57)Fe2(adt)(CN)2(CO)4](2-) was synthesized from the (57)Fe metal, S8, CO, (NEt4)CN, NH4Cl, and CH2O. (Et4N)2[(57)Fe2(adt)(CN)2(CO)4] was then used for the maturation of the [FeFe] hydrogenase HydA1 from Chlamydomonas reinhardtii, to yield the enzyme selectively labeled at the [2Fe]H subcluster. Complementary (57)Fe enrichment of the [4Fe-4S]H cluster was realized by reconstitution with (57)FeCl3 and Na2S. The Hox-CO state of [2(57)Fe]H and [4(57)Fe-4S]H HydA1 was characterized by Mössbauer, HYSCORE, ENDOR, and nuclear resonance vibrational spectroscopy.
Collapse
Affiliation(s)
- Ryan Gilbert-Wilson
- †School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Judith F Siebel
- ‡Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Agnieszka Adamska-Venkatesh
- ‡Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Cindy C Pham
- §Department of Chemistry, University of California, Davis, California 95616, United States
| | - Edward Reijerse
- ‡Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Hongxin Wang
- §Department of Chemistry, University of California, Davis, California 95616, United States.,∥Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Stephen P Cramer
- §Department of Chemistry, University of California, Davis, California 95616, United States.,∥Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Wolfgang Lubitz
- ‡Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Thomas B Rauchfuss
- †School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
18
|
Caplins BW, Lomont JP, Nguyen SC, Harris CB. Vibrational Cooling Dynamics of a [FeFe]-Hydrogenase Mimic Probed by Time-Resolved Infrared Spectroscopy. J Phys Chem A 2014; 118:11529-40. [DOI: 10.1021/jp510517z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Benjamin W. Caplins
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Justin P. Lomont
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Son C. Nguyen
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Charles B. Harris
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
19
|
dos Santos MVP, Proenza YG, Longo RL. PICVib: an accurate, fast and simple procedure to investigate selected vibrational modes and evaluate infrared intensities. Phys Chem Chem Phys 2014; 16:17670-80. [DOI: 10.1039/c4cp02279c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The generalization of the PICVib approach for calculating selected infrared intensities is shown to be successful and to preserves its easiness of implementation and parallelization, flexibility and treatment of large systems and/or at high theoretical levels.
Collapse
Affiliation(s)
- Marcus V. P. dos Santos
- Departamento de Química Fundamental
- Universidade Federal de Pernambuco
- Cidade Universitária
- Recife-PE, Brazil
| | - Yaicel G. Proenza
- Departamento de Química Fundamental
- Universidade Federal de Pernambuco
- Cidade Universitária
- Recife-PE, Brazil
| | - Ricardo L. Longo
- Departamento de Química Fundamental
- Universidade Federal de Pernambuco
- Cidade Universitária
- Recife-PE, Brazil
| |
Collapse
|
20
|
Li Q, Li YN, Wang T, Wang SG, Huo CF, Li YW, Wang J, Jiao H. Electronic structures and energies of Fe2(CO)n (n=0-9). Chemphyschem 2013; 14:1573-6. [PMID: 23512261 DOI: 10.1002/cphc.201300076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 02/26/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Siebert E, Horch M, Rippers Y, Fritsch J, Frielingsdorf S, Lenz O, Velazquez Escobar F, Siebert F, Paasche L, Kuhlmann U, Lendzian F, Mroginski M, Zebger I, Hildebrandt P. Resonance Raman Spectroscopy as a Tool to Monitor the Active Site of Hydrogenases. Angew Chem Int Ed Engl 2013; 52:5162-5. [DOI: 10.1002/anie.201209732] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 01/22/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Elisabeth Siebert
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Marius Horch
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Yvonne Rippers
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Johannes Fritsch
- Institut für Biologie/Mikrobiologie, Humboldt Universität zu Berlin, Chausseestrasse 117, 10115 Berlin (Germany)
| | - Stefan Frielingsdorf
- Institut für Biologie/Mikrobiologie, Humboldt Universität zu Berlin, Chausseestrasse 117, 10115 Berlin (Germany)
| | - Oliver Lenz
- Institut für Biologie/Mikrobiologie, Humboldt Universität zu Berlin, Chausseestrasse 117, 10115 Berlin (Germany)
| | - Francisco Velazquez Escobar
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Friedrich Siebert
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Lars Paasche
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Uwe Kuhlmann
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Friedhelm Lendzian
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Maria‐Andrea Mroginski
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Ingo Zebger
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| | - Peter Hildebrandt
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany)
| |
Collapse
|
22
|
Siebert E, Horch M, Rippers Y, Fritsch J, Frielingsdorf S, Lenz O, Velazquez Escobar F, Siebert F, Paasche L, Kuhlmann U, Lendzian F, Mroginski MA, Zebger I, Hildebrandt P. Resonanz-Raman-Spektroskopie als Methode zur Untersuchung des aktiven Zentrums von Hydrogenasen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209732] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
23
|
dos Santos MVP, Aguiar EC, da Silva JBP, Longo RL. PICVib: an accurate, fast, and simple procedure to investigate selected vibrational modes at high theoretical levels. J Comput Chem 2013; 34:611-21. [PMID: 23175235 DOI: 10.1002/jcc.23166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 08/22/2012] [Accepted: 09/30/2012] [Indexed: 11/09/2022]
Abstract
A new approach Procedure for Investigating Categories of Vibrations (PICVib) for estimating vibrational frequencies of selected modes using only the structure and energy calculations at a more demanding computational level is presented and explored. The PICVib has an excellent performance at only a small fraction of the computational demand required for a complete analytical calculation. The errors are smaller than ca. 0.5% when DFT functionals are combined with high level ab initio methods. The approach is general because it can use any quantum chemical program and electronic structure method. It is very robust because it was validated for a wide range of frequency values (ca. 20-4800 cm(-1)) and systems: XH(3) (D(3h) ) with X = B, Al, Ga, N, P, As, O, S, and Se, YH(4) (D(4h) ) with Y = C, Si, and Ge, conformers of RDX, S(N) 2 and E2 reactions, [W(dppe)(2)(NNC(5)H(10))] complex, carbon nanotubes, and hydrogen-bonded complexes including guanine-cytosine pair.
Collapse
Affiliation(s)
- Marcus V P dos Santos
- Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, Cidade Universitária, Recife-PE, Brazil
| | | | | | | |
Collapse
|
24
|
Structural effects upon the durability of hydrogenase-inspired hydrogen-producing electrocatalysts: Variations in the (μ-edt)[Fe2(CO)6] system. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.12.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
25
|
Kamali S, Wang H, Mitra D, Ogata H, Lubitz W, Manor BC, Rauchfuss TB, Byrne D, Bonnefoy V, Jenney FE, Adams MWW, Yoda Y, Alp E, Zhao J, Cramer SP. Observation of the Fe-CN and Fe-CO vibrations in the active site of [NiFe] hydrogenase by nuclear resonance vibrational spectroscopy. Angew Chem Int Ed Engl 2013; 52:724-8. [PMID: 23136119 PMCID: PMC3535562 DOI: 10.1002/anie.201204616] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 08/09/2012] [Indexed: 11/06/2022]
Abstract
Nuclear inelastic scattering of (57)Fe labeled [NiFe] hydrogenase is shown to give information on different states of the enzyme. It was thus possible to detect and assign Fe-CO and Fe-CN bending and stretching vibrations of the active site outside the spectral range of the Fe-S cluster normal modes.
Collapse
Affiliation(s)
- Saeed Kamali
- Department of Chemistry, University of California Davis, CA 95616 (USA)
| | - Hongxin Wang
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
- Department of Chemistry, University of California Davis, CA 95616 (USA)
| | - Devrani Mitra
- Department of Chemistry, University of California Davis, CA 95616 (USA)
| | - Hideaki Ogata
- Max-Planck-Institut für Chemische Energiekonversion 45470 Mülheim an der Ruhr (Germany)
| | - Wolfgang Lubitz
- Max-Planck-Institut für Chemische Energiekonversion 45470 Mülheim an der Ruhr (Germany)
| | - Brian C. Manor
- Department of Chemistry, University of Illinois Champaign-Urbana, IL 61801 (USA)
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois Champaign-Urbana, IL 61801 (USA)
| | - Deborah Byrne
- Institut de Microbiologie de la Méditerranée Aix-Marseille-Universit , Marseille 13009 (France)
| | - Violaine Bonnefoy
- CNRS, IMM, Laboratoire de Chimie Bactérienne Marseille Cedex 20 (France)
| | - Francis E. Jenney
- Georgia Campus, Philadelphia College of Osteopathic Medicine Suwanee, GA 30024 (USA)
| | - Michael W. W. Adams
- Department of Biochemistry & Molecular Biology University of Georgia, Athens, GA 30602 (USA)
| | - Yoshitaka Yoda
- JASRI, SPring-8 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
| | - Ercan Alp
- Advanced Photon Source, Argonne National Laboratory Argonne, IL 60439 (USA)
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory Argonne, IL 60439 (USA)
| | - Stephen P. Cramer
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
- Department of Chemistry, University of California Davis, CA 95616 (USA)
| |
Collapse
|
26
|
Kamali S, Wang H, Mitra D, Ogata H, Lubitz W, Manor BC, Rauchfuss TB, Byrne D, Bonnefoy V, Jenney FE, Adams MWW, Yoda Y, Alp E, Zhao J, Cramer SP. Detektion von Fe-CN- und Fe-CO-Schwingungen im aktiven Zentrum der [NiFe]-Hydrogenase durch inelastische kernresonante Streuung. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204616] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
27
|
Kania R, Frederix PWJM, Wright JA, Ulijn RV, Pickett CJ, Hunt NT. Solution-phase photochemistry of a [FeFe]hydrogenase model compound: Evidence of photoinduced isomerisation. J Chem Phys 2012; 136:044521. [DOI: 10.1063/1.3679387] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
Marhenke J, Pierri AE, Lomotan M, Damon PL, Ford PC, Works C. Flash and Continuous Photolysis Kinetic Studies of the Iron–Iron Hydrogenase Model (μ-pdt)[Fe(CO)3]2 in Different Solvents. Inorg Chem 2011; 50:11850-2. [DOI: 10.1021/ic201523r] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jon Marhenke
- Department of Physical
Sciences, Butte College, Oroville,
California 95965, United States
| | - Agustin E. Pierri
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106-9510,
United States
| | - Melanie Lomotan
- Department of Chemistry, Sonoma State University, Rohnert Park,
California 94928-3609, United States
| | - Peter L. Damon
- Department of Chemistry, Sonoma State University, Rohnert Park,
California 94928-3609, United States
| | - Peter C. Ford
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106-9510,
United States
| | - Carmen Works
- Department of Chemistry, Sonoma State University, Rohnert Park,
California 94928-3609, United States
| |
Collapse
|
29
|
A new cumulene diiron complex related to the active site of Fe-only hydrogenases and its phosphine substituted derivatives: Synthesis, electrochemistry and structural characterization. J Inorg Biochem 2011; 105:1123-30. [DOI: 10.1016/j.jinorgbio.2011.05.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 05/18/2011] [Accepted: 05/26/2011] [Indexed: 11/18/2022]
|
30
|
Yu L, Greco C, Bruschi M, Ryde U, De Gioia L, Reiher M. Targeting intermediates of [FeFe]-hydrogenase by CO and CN vibrational signatures. Inorg Chem 2011; 50:3888-900. [PMID: 21443182 DOI: 10.1021/ic102039z] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In this work, we employ density functional theory to assign vibrational signatures of [FeFe]-hydrogenase intermediates to molecular structures. For this purpose, we perform an exhaustive analysis of structures and harmonic vibrations of a series of CN and CO containing model clusters of the [FeFe]-hydrogenase enzyme active site considering also different charges, counterions, and solvents. The pure density functional BP86 in combination with a triple-ζ polarized basis set produce reliable molecular structures as well as harmonic vibrations. Calculated CN and CO stretching vibrations are analyzed separately. Scaled vibrational frequencies are then applied to assign intermediates in [FeFe]-hydrogenase's reaction cycle. The results nicely complement the previous studies of Darensbourg and Hall, and Zilberman et al. The infrared spectrum of the H(ox) form is in very good agreement with the calculated spectrum of the Fe(I)Fe(II) model complex featuring a free coordination site at the distal Fe atom, as well as, with the calculated spectra of the complexes in which H(2) or H(2)O are coordinated at this site. The spectrum of H(red) measured from Desulfovibrio desulfuricans is compatible with a mixture of a Fe(I)Fe(I) species with all terminal COs, and a Fe(I)Fe(I) species with protonated dtma ligand, while the spectrum of H(red) recently measured from Chlamydomonas reinhardtii is compatible with a mixture of a Fe(I)Fe(I) species with a bridged CO, and a Fe(II)Fe(II) species with a terminal hydride bound to the Fe atom.
Collapse
Affiliation(s)
- Lian Yu
- Laboratorium für Physikalische Chemie, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | | | | | | | | | | |
Collapse
|
31
|
Galinato MGI, Whaley CM, Roberts D, Wang P, Lehnert N. Favorable Protonation of the (μ-edt)[Fe(2)(PMe(3))(4)(CO)(2)(H-terminal)](+) Hydrogenase Model Complex Over Its Bridging μ-H Counterpart: A Spectroscopic and DFT Study. Eur J Inorg Chem 2011; 2011:1147-1154. [PMID: 23162378 PMCID: PMC3498055 DOI: 10.1002/ejic.201001037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Indexed: 11/11/2022]
Abstract
The mechanism of hydrogen production in [FeFe] hydrogenase remains elusive. However, a species featuring a terminal hydride bound to the distal Fe is thought to be the key intermediate leading to hydrogen production. In this study, density functional theory (DFT) calculations on the terminal (H-term) and bridging (μ-H) hydride isomers of (μ-edt)-[Fe(2)(PMe(3))(4)(CO)(2)H](+) are presented in order to understand the factors affecting their propensity for protonation. Relative to H-term, μ-H is 12.7 kcal/mol more stable, which contributes to its decreased reactivity towards an acid. Potential energy surface (PES) calculations for the reaction of the H-term isomer with 4-nitropyridinium, a proton source, further reveal a lower activation energy barrier (14.5 kcal/mol) for H-term than for μ-H (29 kcal/mol). Besides these energetic considerations, the H-term isomer displays a key molecular orbital (MO <139>) that has a relatively strong hydride (1s) contribution (23%), which is not present in the μ-H isomer. This indicates a potential orbital control of the reaction of the hydride complexes with acid. The lower activation energy barrier and this key MO together control the overall catalytic activity of (μ-edt)[Fe(2)(PMe(3))(4)(CO)(2)(H-term)](+). Lastly, Raman and IR spectroscopy were performed in order to probe the ν(Fe-H) stretching mode of the two isomers and their deuterated counterparts. A ν(Fe-H) stretching mode was observed for the μ-H complex at 1220 cm(-1). However, the corresponding mode is not observed for the less stable H-term isomer.
Collapse
Affiliation(s)
| | - C. Matthew Whaley
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Dean Roberts
- Bruker Optics Inc. 19 Fortune Drive, Manning Park, Billerica, MA 01821, USA
| | - Peng Wang
- Bruker Optics Inc. 19 Fortune Drive, Manning Park, Billerica, MA 01821, USA
| | - Nicolai Lehnert
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| |
Collapse
|
32
|
Kaziannis S, Santabarbara S, Wright JA, Greetham GM, Towrie M, Parker AW, Pickett CJ, Hunt NT. Femtosecond to Microsecond Photochemistry of a [FeFe]hydrogenase Enzyme Model Compound. J Phys Chem B 2010; 114:15370-9. [DOI: 10.1021/jp107618n] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Spyridon Kaziannis
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Stefano Santabarbara
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Joseph A. Wright
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Gregory M. Greetham
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Michael Towrie
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Anthony W. Parker
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Christopher J. Pickett
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| | - Neil T. Hunt
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, G4 0NG, U.K.; School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K.; and Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K
| |
Collapse
|
33
|
Stewart AI, Wright JA, Greetham GM, Kaziannis S, Santabarbara S, Towrie M, Parker AW, Pickett CJ, Hunt NT. Determination of the Photolysis Products of [FeFe]Hydrogenase Enzyme Model Systems using Ultrafast Multidimensional Infrared Spectroscopy. Inorg Chem 2010; 49:9563-73. [DOI: 10.1021/ic101289s] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew I. Stewart
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, U.K
| | - Joseph A. Wright
- School of Chemical Sciences, University of East Anglia, Norwich, U.K
| | - Gregory M. Greetham
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, U.K
| | - Spiridon Kaziannis
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, U.K
| | - Stefano Santabarbara
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, U.K
| | - Michael Towrie
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, U.K
| | - Anthony W. Parker
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, Oxon, U.K
| | | | - Neil T. Hunt
- Department of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, U.K
| |
Collapse
|