1
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Nayek A, Dey S, Patra S, Rana A, Serrano PN, George SJ, Cramer SP, Ghosh Dey S, Dey A. Facile electrocatalytic proton reduction by a [Fe-Fe]-hydrogenase bio-inspired synthetic model bearing a terminal CN - ligand. Chem Sci 2024; 15:2167-2180. [PMID: 38332837 PMCID: PMC10848691 DOI: 10.1039/d3sc05397k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/22/2023] [Indexed: 02/10/2024] Open
Abstract
An azadithiolate bridged CN- bound pentacarbonyl bis-iron complex, mimicking the active site of [Fe-Fe] H2ase is synthesized. The geometric and electronic structure of this complex is elucidated using a combination of EXAFS analysis, infrared and Mössbauer spectroscopy and DFT calculations. The electrochemical investigations show that complex 1 effectively reduces H+ to H2 between pH 0-3 at diffusion-controlled rates (1011 M-1 s-1) i.e. 108 s-1 at pH 3 with an overpotential of 140 mV. Electrochemical analysis and DFT calculations suggests that a CN- ligand increases the pKa of the cluster enabling hydrogen production from its Fe(i)-Fe(0) state at pHs much higher and overpotential much lower than its precursor bis-iron hexacarbonyl model which is active in its Fe(0)-Fe(0) state. The formation of a terminal Fe-H species, evidenced by spectroelectrochemistry in organic solvent, via a rate determining proton coupled electron transfer step and protonation of the adjacent azadithiolate, lowers the kinetic barrier leading to diffusion controlled rates of H2 evolution. The stereo-electronic factors enhance its catalytic rate by 3 order of magnitude relative to a bis-iron hexacarbonyl precursor at the same pH and potential.
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Affiliation(s)
- Abhijit Nayek
- School of Chemical Science, Indian Association for the Cultivation of Science Kolkata 700032 India
| | - Subal Dey
- School of Chemical Science, Indian Association for the Cultivation of Science Kolkata 700032 India
| | - Suman Patra
- School of Chemical Science, Indian Association for the Cultivation of Science Kolkata 700032 India
| | - Atanu Rana
- School of Chemical Science, Indian Association for the Cultivation of Science Kolkata 700032 India
| | - Pauline N Serrano
- Department of Chemistry, University of California Davis CA 94616 USA
| | - Simon J George
- Department of Chemistry, University of California Davis CA 94616 USA
- SETI Institute 339 Bernardo Ave, Suite, 200 Mountain View CA 94043 USA
| | - Stephen P Cramer
- Department of Chemistry, University of California Davis CA 94616 USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- SETI Institute 339 Bernardo Ave, Suite, 200 Mountain View CA 94043 USA
| | - Somdatta Ghosh Dey
- School of Chemical Science, Indian Association for the Cultivation of Science Kolkata 700032 India
| | - Abhishek Dey
- School of Chemical Science, Indian Association for the Cultivation of Science Kolkata 700032 India
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2
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Torres A, Vicent DJ, Collado A, Gómez-Gallego M, de Arellano CR, Sierra MA. Phosphite Bearing [(μ-ADT) RFe 2(CO) 6] (ADT = Azadithiolate) Moieties: A Tool for the Building of Multimetallic [FeFe]-Hydrogenase Mimics. Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- Alejandro Torres
- Departamento de Química Orgánica, Facultad de Química Universidad Complutense, 28040 Madrid, Spain
| | - Diego J. Vicent
- Departamento de Química Orgánica, Facultad de Química Universidad Complutense, 28040 Madrid, Spain
| | - Alba Collado
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Mar Gómez-Gallego
- Departamento de Química Orgánica, Facultad de Química Universidad Complutense, 28040 Madrid, Spain
| | | | - Miguel A. Sierra
- Departamento de Química Orgánica, Facultad de Química Universidad Complutense, 28040 Madrid, Spain
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3
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Abaalkhail SA, Abul-Futouh H, Görls H, Weigand W. Electrochemical Behavior of Mono‐Substituted [FeFe]‐Hydrogenase H‐Cluster Mimic Mediated by Stannylated Dithiolato Ligand. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Hassan Abul-Futouh
- The Hashemite University Chemistry P.O. Box 330127, Zarqa 13133 13133 Zaraqa JORDAN
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4
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Yan L, Yang J, Liu XF, Li YL, Liu XH, Jiang ZQ. Di-1-adamantylphosphine-containing diiron propane-1,3-dithiolate pentacarbonyl complex: Synthesis, structure, electrochemistry, and fungicidal activity. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2021.1989591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Lin Yan
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Jun Yang
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, China
| | - Xu-Feng Liu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, China
| | - Xing-Hai Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Zhong-Qing Jiang
- Department of Physics, Key Laboratory of ATMMT Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, China
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5
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Redman HJ, Huang P, Haumann M, Cheah MH, Berggren G. Lewis acid protection turns cyanide containing [FeFe]-hydrogenase mimics into proton reduction catalysts. Dalton Trans 2022; 51:4634-4643. [PMID: 35212328 PMCID: PMC8939051 DOI: 10.1039/d1dt03896f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Sustainable sources of hydrogen are a vital component of the envisioned energy transition. Understanding and mimicking the [FeFe]-hydrogenase provides a route to achieving this goal. In this study we re-visit a molecular mimic of the hydrogenase, the propyl dithiolate bridged complex [Fe2(μ-pdt)(CO)4(CN)2]2−, in which the cyanide ligands are tuned via Lewis acid interactions. This system provides a rare example of a cyanide containing [FeFe]-hydrogenase mimic capable of catalytic proton reduction, as demonstrated by cyclic voltammetry. EPR, FTIR, UV-vis and X-ray absorption spectroscopy are employed to characterize the species produced by protonation, and reduction or oxidation of the complex. The results reveal that biologically relevant iron-oxidation states can be generated, potentially including short-lived mixed valent Fe(i)Fe(ii) species. We propose that catalysis is initiated by protonation of the diiron complex and the resulting di-ferrous bridging hydride species can subsequently follow two different pathways to promote H2 gas formation depending on the applied reduction potential. Mimicking the hydrogen-bonding interactions of the [FeFe]-hydrogenase active-site using Lewis acids transforms an otherwise unstable cyanide containing hydrogenase mimic into a proton reduction catalyst.![]()
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Affiliation(s)
- Holly J Redman
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
| | - Ping Huang
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
| | - Michael Haumann
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Mun Hon Cheah
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
| | - Gustav Berggren
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
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6
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Natarajan M, Kumar N, Joshi M, Stein M, Kaur‐Ghumaan S. Mechanism of Diiron Hydrogenase Complexes Controlled by Nature of Bridging Dithiolate Ligand. ChemistryOpen 2022; 11:e202100238. [PMID: 34981908 PMCID: PMC8734113 DOI: 10.1002/open.202100238] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/12/2021] [Indexed: 01/22/2023] Open
Abstract
Bio-inorganic complexes inspired by hydrogenase enzymes are designed to catalyze the hydrogen evolution reaction (HER). A series of new diiron hydrogenase mimic complexes with one or two terminal tris(4-methoxyphenyl)phosphine and different μ-bridging dithiolate ligands and show catalytic activity towards electrochemical proton reduction in the presence of weak and strong acids. A series of propane- and benzene-dithiolato-bridged complexes was synthesized, crystallized, and characterized by various spectroscopic techniques and quantum chemical calculations. Their electrochemical properties as well as the detailed reaction mechanisms of the HER are elucidated by density functional theory (DFT) methods. The nature of the μ-bridging dithiolate is critically controlling the reaction and performance of the HER of the complexes. In contrast, terminal phosphine ligands have no significant effects on redox activities and mechanism. Mono- or di-substituted propane-dithiolate complexes afford a sequential reduction (electrochemical; E) and protonation (chemical; C) mechanism (ECEC), while the μ-benzene dithiolate complexes follow a different reaction mechanism and are more efficient HER catalysts.
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Affiliation(s)
| | - Naveen Kumar
- Department of ChemistryUniversity of DelhiDelhi110007India
| | - Meenakshi Joshi
- Max-Planck-Institute for Dynamics of Complex Technical SystemsMolecular Simulations and Design GroupSandtorstrasse 139106MagdeburgGermany
| | - Matthias Stein
- Max-Planck-Institute for Dynamics of Complex Technical SystemsMolecular Simulations and Design GroupSandtorstrasse 139106MagdeburgGermany
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7
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Zhang F, Woods TJ, Zhu L, Rauchfuss TB. Inhibition of [FeFe]-hydrogenase by formaldehyde: proposed mechanism and reactivity of FeFe alkyl complexes. Chem Sci 2021; 12:15673-15681. [PMID: 35003598 PMCID: PMC8653999 DOI: 10.1039/d1sc05803g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 11/15/2021] [Indexed: 11/21/2022] Open
Abstract
The mechanism for inhibition of [FeFe]-hydrogenases by formaldehyde is examined with model complexes. Key findings: (i) CH2 donated by formaldehyde covalently link Fe and the amine cofactor, blocking the active site and (ii) the resulting Fe-alkyl is a versatile electrophilic alkylating agent. Solutions of Fe2[(μ-SCH2)2NH](CO)4(PMe3)2 (1) react with a mixture of HBF4 and CH2O to give three isomers of [Fe2[(μ-SCH2)2NCH2](CO)4(PMe3)2]+ ([2]+). X-ray crystallography verified the NCH2Fe linkage to an octahedral Fe(ii) site. Although [2]+ is stereochemically rigid on the NMR timescale, spin-saturation transfer experiments implicate reversible dissociation of the Fe-CH2 bond, allowing interchange of all three diastereoisomers. Using 13CH2O, the methylenation begins with formation of [Fe2[(μ-SCH2)2N13CH2OH](CO)4(PMe3)2]+. Protonation converts this hydroxymethyl derivative to [2]+, concomitant with 13C-labelling of all three methylene groups. The Fe-CH2N bond in [2]+ is electrophilic: PPh3, hydroxide, and hydride give, respectively, the phosphonium [Fe2[(μ-SCH2)2NCH2PPh3](CO)4(PMe3)2]+, 1, and the methylamine Fe2[(μ-SCH2)2NCH3](CO)4(PMe3)2. The reaction of [Fe2[(μ-SCH2)2NH](CN)2(CO)4]2- with CH2O/HBF4 gave [Fe2[(μ-SCH2)2NCH2CN](CN)(CO)5]- ([4]-), the result of reductive elimination from [Fe2[(μ-SCH2)2NCH2](CN)2(CO)4]-. The phosphine derivative [Fe2[(μ-SCH2)2NCH2CN](CN)(CO)4(PPh3)]- ([5]-) was characterized crystallographically.
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Affiliation(s)
- Fanjun Zhang
- School of Chemical Sciences, University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Toby J Woods
- School of Chemical Sciences, University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Lingyang Zhu
- School of Chemical Sciences, University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Thomas B Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana-Champaign Urbana IL 61801 USA
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8
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Chen FY, Hu MY, Gu XL, Liu XF, Zhao PH. ADT-Type [FeFe]-hydrogenase biomimics featuring monodentate phosphines: formation, structures, and electrocatalysis. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00482-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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9
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Yan L, Wang LH, Tian WJ, Liu XF, Li YL, Liu XH, Jiang ZQ. Diiron carbonyl complexes containing bridging 1,3-bis(diphenylphosphino)propane or monosubstituted tris(3-fluorophenyl)phosphine: synthesis, characterization, X-ray crystallography, and electrochemistry. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1952257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Lin Yan
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Ling-Hui Wang
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Wen-Jing Tian
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Xu-Feng Liu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Xing-Hai Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Zhong-Qing Jiang
- Department of Physics, Key Laboratory of ATMMT Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, China
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10
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Charles RM, Brewster TP. H 2 and carbon-heteroatom bond activation mediated by polarized heterobimetallic complexes. Coord Chem Rev 2021; 433. [PMID: 35418712 DOI: 10.1016/j.ccr.2020.213765] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The field of heterobimetallic chemistry has rapidly expanded over the last decade. In addition to their interesting structural features, heterobimetallic structures have been found to facilitate a range of stoichiometric bond activations and catalytic processes. The accompanying review summarizes advances in this area since January of 2010. The review encompasses well-characterized heterobimetallic complexes, with a particular focus on mechanistic details surrounding their reactivity applications.
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Affiliation(s)
- R Malcolm Charles
- Department of Chemistry, The University of Memphis, 3744 Walker Ave., Smith Chemistry Building, Memphis, TN 38152, United States
| | - Timothy P Brewster
- Department of Chemistry, The University of Memphis, 3744 Walker Ave., Smith Chemistry Building, Memphis, TN 38152, United States
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11
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Arrigoni F, Zampella G, Zhang F, Kagalwala HN, Li QL, Woods TJ, Rauchfuss TB. Computational and Experimental Investigations of the Fe 2(μ-S 2)/Fe 2(μ-S) 2 Equilibrium. Inorg Chem 2021; 60:3917-3926. [PMID: 33650855 PMCID: PMC8100967 DOI: 10.1021/acs.inorgchem.0c03709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Density functional theory (DFT) calculations on Fe2S2(CO)6-2n(PMe3)2n for n = 0, 1, and 2 reveal that the most electron-rich derivatives (n = 2) exist as diferrous disulfides lacking an S-S bond. The thermal interconversion of the FeII2(S)2 and FeI2(S2) valence isomers is symmetry-forbidden. Related electron-rich diiron complexes [Fe2S2(CN)2(CO)4]2- of an uncertain structure are implicated in the biosynthesis of [FeFe]-hydrogenases. Several efforts to synthesize electron-rich derivatives of Fe2(μ-S2)(CO)6 (1) are described. First, salts of iron persulfido cyanides [Fe2(μ-S2)(CO)5(CN)]- and [Fe2(μ-S2)(CN)(CO)4(PPh3)]- were prepared by the reactions of NaN(tms)2 with 1 and Fe2(μ-S2)(CO)5(PPh3), respectively. Alternative approaches to electron-rich diiron disulfides targeted Fe2(μ-S2)(CO)4(diphosphine). Whereas the preparation of Fe2(μ-S2)(CO)4(dppbz) was straightforward, that of Fe2(μ-S2)(CO)4(dppv) required an indirect route involving the oxidation of Fe2(μ-SH)2(CO)4(dppv) (dppbz = C6H4-1,2-(PPh2)2, dppv = cis-C2H2(PPh2)2). DFT calculations indicate that the oxidation of Fe2(μ-SH)2(CO)4(dppv) produces singlet diferrous disulfide Fe2(μ-S)2(CO)4(dppv), which is sufficiently long-lived as to be trapped by ethylene. The reaction of 1 and dppv mainly afforded Fe2(μ-SCH=CHPPh2)(μ-SPPh2)(CO)5, implicating a S-centered reaction.
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Affiliation(s)
- Federica Arrigoni
- Department of Biotechnology and Biosciences University of Milano-Bicocca Piazza della Scienza 2 20126-Milan, Italy
| | - Giuseppe Zampella
- Department of Biotechnology and Biosciences University of Milano-Bicocca Piazza della Scienza 2 20126-Milan, Italy
| | - Fanjun Zhang
- School of Chemical Sciences University of Illinois Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Husain N Kagalwala
- School of Chemical Sciences University of Illinois Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Qian-Li Li
- School of Chemical Sciences University of Illinois Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Toby J Woods
- School of Chemical Sciences University of Illinois Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Thomas B Rauchfuss
- School of Chemical Sciences University of Illinois Urbana-Champaign, Champaign, Illinois 61801, United States
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12
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Chen FY, Wang LH, Tian WJ, Liu XF, Li YL, Liu XH, Jiang ZQ. Synthesis, X-ray crystal structures, and electrochemistry of two diiron ethane-1,2-dithiolate complexes containing tris(4-trifluoromethylphenyl)phosphine or triethyl phosphite. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1897613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Fei-Yan Chen
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Ling-Hui Wang
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Wen-Jing Tian
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Xu-Feng Liu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Xing-Hai Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Zhong-Qing Jiang
- Department of Physics, Key Laboratory of ATMMT Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, China
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13
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Meyers A, Heilweil EJ, Stromberg CJ. Photodynamics of Asymmetric Di-Iron-Cyano Hydrogenases Examined by Time-Resolved Mid-Infrared Spectroscopy. J Phys Chem A 2021; 125:1413-1423. [PMID: 33567824 DOI: 10.1021/acs.jpca.0c08921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two anionic asymmetric Fe-Fe hydrogenase model compounds containing a single cyano (CN) and five carboxyl (CO) ligands, [Et4N][Fe2(μ-S2C3H6)(CO)5(CN)1] and [Et4N][Fe2(μ-S2C2H4)(CO)5(CN)1], dissolved in room-temperature acetonitrile, are examined. The molecular asymmetry affects the redox potentials of the central iron atoms, thus changing the photophysics and possible catalytic properties of the compounds. Femtosecond ultraviolet excitation with mid-infrared probe spectroscopy of the model compounds was employed to better understand the ultrafast dynamics of the enzyme-active site. Continuous ultraviolet lamp excitation with Fourier transform infrared (FTIR) spectroscopy was also used to explore stable product formation on the second timescale. For both model compounds, two timescales are observed; a 20-30 ps decay and the formation of a long-lived photoproduct. The picosecond decay is assigned to vibrational cooling and rotational dynamics, while the residual spectra remain for up to 300 ps, suggesting the formation of new photoproducts. Static FTIR spectroscopy yielded a different stable photoproduct than that observed on the ultrafast timescale. Density functional theory calculations simulated photoproducts for CO-loss and CN-loss isomers, and the resulting photoproduct spectra suggest that the picosecond transients arise from a complex mixture of isomerization after CO-loss, while dimerization and formation of a CN-containing Fe-CO-Fe bridged species are also considered.
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Affiliation(s)
- Amber Meyers
- Department of Chemistry and Physics, Hood College, Frederick, Maryland 21701-8524, United States
| | - Edwin J Heilweil
- Nanoscale Device Characterization Division, Physical Measurement Laboratory, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States
| | - Christopher J Stromberg
- Department of Chemistry and Physics, Hood College, Frederick, Maryland 21701-8524, United States
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14
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Selective photocatalytic reduction of CO2 to CO mediated by a [FeFe]-hydrogenase model with a 1,2-phenylene S-to-S bridge. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63644-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Abul-Futouh H, Almazahreh LR, Abaalkhail SJ, Görls H, Stripp ST, Weigand W. Ligand effects on structural, protophilic and reductive features of stannylated dinuclear iron dithiolato complexes. NEW J CHEM 2021. [DOI: 10.1039/d0nj04790b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of Fe2(CO)5(L){μ-(SCH2)2SnMe2} (L = PPh3 (2) and P(OMe)3 (3)) derived from the parent hexacarbonyl complex Fe2(CO)6{μ-(SCH2)2}SnMe2 (1) are reported.
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Affiliation(s)
- Hassan Abul-Futouh
- Department of Pharmacy
- Al-Zaytoonah University of Jordan
- Amman 11733
- Jordan
| | - Laith R. Almazahreh
- ERCOSPLAN Ingenieurbüro Anlagentechnik GmbH
- 99096 Erfurt
- Germany
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
| | - Sara J. Abaalkhail
- Department of Pharmacy
- Al-Zaytoonah University of Jordan
- Amman 11733
- Jordan
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
| | - Sven T. Stripp
- Bioinorganic Spectroscopy
- Department of Physics
- Freie Universität Berlin
- 1495 Berlin
- Germany
| | - Wolfgang Weigand
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
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16
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Kleinhaus JT, Wittkamp F, Yadav S, Siegmund D, Apfel UP. [FeFe]-Hydrogenases: maturation and reactivity of enzymatic systems and overview of biomimetic models. Chem Soc Rev 2021; 50:1668-1784. [DOI: 10.1039/d0cs01089h] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
[FeFe]-hydrogenases recieved increasing interest in the last decades. This review summarises important findings regarding their enzymatic reactivity as well as inorganic models applied as electro- and photochemical catalysts.
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Affiliation(s)
| | | | - Shanika Yadav
- Inorganic Chemistry I
- Ruhr University Bochum
- 44801 Bochum
- Germany
| | - Daniel Siegmund
- Department of Electrosynthesis
- Fraunhofer UMSICHT
- 46047 Oberhausen
- Germany
| | - Ulf-Peter Apfel
- Inorganic Chemistry I
- Ruhr University Bochum
- 44801 Bochum
- Germany
- Department of Electrosynthesis
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17
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Yan L, Hu K, Liu X, Li Y, Liu X, Jiang Z. Diiron ethane‐1,2‐dithiolate complexes with 1,2,3‐thiadiazole moiety: Synthesis, X‐ray crystal structures, electrochemistry and fungicidal activity. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6084] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lin Yan
- School of Materials and Chemical Engineering Ningbo University of Technology Ningbo China
| | - Kui Hu
- College of Chemistry and Environmental Engineering Sichuan University of Science & Engineering Zigong China
| | - Xu‐Feng Liu
- School of Materials and Chemical Engineering Ningbo University of Technology Ningbo China
| | - Yu‐Long Li
- College of Chemistry and Environmental Engineering Sichuan University of Science & Engineering Zigong China
| | - Xing‐Hai Liu
- College of Chemical Engineering Zhejiang University of Technology Hangzhou China
| | - Zhong‐Qing Jiang
- Department of Physics, Key Laboratory of ATMMT Ministry of Education Zhejiang Sci‐Tech University Hangzhou China
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18
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Li H, Chai XC, Wang J, Li J, Yao CZ. Synthesis, characterization, and electrochemistry of diiron ethane-1,2-dithiolate complexes with monosubstituted ethyldiphenylphosphine or dicyclohexylphenylphosphine. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1756292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Hui Li
- Department of Applied Chemistry, Yuncheng University, Yuncheng, China
| | - Xiao-Chuan Chai
- Department of Applied Chemistry, Yuncheng University, Yuncheng, China
| | - Jie Wang
- Department of Applied Chemistry, Yuncheng University, Yuncheng, China
| | - Jun Li
- Department of Applied Chemistry, Yuncheng University, Yuncheng, China
| | - Chen-Zhong Yao
- Department of Applied Chemistry, Yuncheng University, Yuncheng, China
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19
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Arrigoni F, Bertini L, Breglia R, Greco C, De Gioia L, Zampella G. Catalytic H 2 evolution/oxidation in [FeFe]-hydrogenase biomimetics: account from DFT on the interplay of related issues and proposed solutions. NEW J CHEM 2020. [DOI: 10.1039/d0nj03393f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A DFT overview on selected issues regarding diiron catalysts related to [FeFe]-hydrogenase biomimetic research, with implications for both energy conversion and storage strategies.
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Affiliation(s)
- Federica Arrigoni
- Department of Biotechnology and Biosciences
- University of Milano – Bicocca
- 20126 Milan
- Italy
| | - Luca Bertini
- Department of Biotechnology and Biosciences
- University of Milano – Bicocca
- 20126 Milan
- Italy
| | - Raffaella Breglia
- Department of Biotechnology and Biosciences
- University of Milano – Bicocca
- 20126 Milan
- Italy
- Department of Earth and Environmental Sciences
| | - Claudio Greco
- Department of Biotechnology and Biosciences
- University of Milano – Bicocca
- 20126 Milan
- Italy
- Department of Earth and Environmental Sciences
| | - Luca De Gioia
- Department of Biotechnology and Biosciences
- University of Milano – Bicocca
- 20126 Milan
- Italy
| | - Giuseppe Zampella
- Department of Biotechnology and Biosciences
- University of Milano – Bicocca
- 20126 Milan
- Italy
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20
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Gao S, Liu Y, Shao Y, Jiang D, Duan Q. Iron carbonyl compounds with aromatic dithiolate bridges as organometallic mimics of [FeFe] hydrogenases. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213081] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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21
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Abul-Futouh H, Daraosheh AQ, Windhager J, Görls H, Weigand W. Synthesis and characterization of [FeFe]-hydrogenase models mediated by a 1,2,4-trithiolane derivative: Insight into molecular structures and electrochemical characteristics. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114155] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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22
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Merinero AD, Collado A, Casarrubios L, Gómez-Gallego M, Ramírez de Arellano C, Caballero A, Zapata F, Sierra MA. Triazole-Containing [FeFe] Hydrogenase Mimics: Synthesis and Electrocatalytic Behavior. Inorg Chem 2019; 58:16267-16278. [DOI: 10.1021/acs.inorgchem.9b02813] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alba D. Merinero
- Departamento de Química Orgánica I, Facultad de Química, and Center for Innovation in Advanced Chemistry (ORFEO−CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Alba Collado
- Departamento de Química Orgánica I, Facultad de Química, and Center for Innovation in Advanced Chemistry (ORFEO−CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Luis Casarrubios
- Departamento de Química Orgánica I, Facultad de Química, and Center for Innovation in Advanced Chemistry (ORFEO−CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Mar Gómez-Gallego
- Departamento de Química Orgánica I, Facultad de Química, and Center for Innovation in Advanced Chemistry (ORFEO−CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Carmen Ramírez de Arellano
- Departamento de Química Orgánica and Center for Innovation in Advanced Chemistry (ORFEO−CINQA), Universidad de Valencia, 46100 Valencia, Spain
| | - Antonio Caballero
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain
| | - Fabiola Zapata
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain
| | - Miguel A. Sierra
- Departamento de Química Orgánica I, Facultad de Química, and Center for Innovation in Advanced Chemistry (ORFEO−CINQA), Universidad Complutense, 28040 Madrid, Spain
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23
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Influence of pendant amines in phosphine ligands on the formation, structures, and electrochemical properties of diiron aminophosphine complexes related to [FeFe]-hydrogenases. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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24
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Thornley W, Wirick SA, Riedel-Topper M, DeYonker NJ, Bitterwolf TE, Stromberg CJ, Heilweil EJ. Photodynamics of [FeFe]-Hydrogenase Model Compounds with Bidentate Heterocyclic Ligands. J Phys Chem B 2019; 123:7137-7148. [PMID: 31334657 PMCID: PMC6857538 DOI: 10.1021/acs.jpcb.9b04675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two asymmetrically structured model compounds for the hydrogen-generating [Fe-Fe]-hydrogenase active site were investigated to determine the ultrafast photodynamics, structural intermediates, and photoproducts compared to more common symmetric di-iron species. The bidentate-ligand-containing compounds studied were Fe2(μ-S2C3H6)(CO)4(bipy), 1, and Fe2(μ-S2C3H6)(CO)4(phen), 2, in dilute room temperature acetonitrile solution and low-temperature 2Me-THF matrix isolation using static FTIR difference and time-resolved infrared spectroscopic methods (TRIR). Ultraviolet-visible spectra were also compared to time-dependent density functional theory (TD-DFT) to ascertain the orbital origins of long wavelength electronic absorption features. The spectroscopic evidence supports the conclusions that only a propyl-bridge flip occurs in low-temperature matrix, while early time CO ejection leads to the formation of solvated isomeric species on the 25 ps time scale in room temperature solution.
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Affiliation(s)
- Wyatt Thornley
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., MS 2343, Moscow, ID 83844-2343, United States
| | - Sarah A. Wirick
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Maximilian Riedel-Topper
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Nathan J. DeYonker
- Department of Chemistry, The University of Memphis, 411 Smith Hall, 3744 Walker Avenue, Memphis, TN 38152
| | - Thomas E. Bitterwolf
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., MS 2343, Moscow, ID 83844-2343, United States
| | - Christopher J. Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Edwin J. Heilweil
- Nanoscale Device Characterization Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8443 United States
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25
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Papini C, Sommer C, Pecqueur L, Pramanik D, Roy S, Reijerse EJ, Wittkamp F, Artero V, Lubitz W, Fontecave M. Bioinspired Artificial [FeFe]-Hydrogenase with a Synthetic H-Cluster. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00540] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Cecilia Papini
- Laboratoire de Chimie des Processus Biologiques, Collège de France−CNRS−Sorbonne Université, CNRS UMR 8229, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Constanze Sommer
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
| | - Ludovic Pecqueur
- Laboratoire de Chimie des Processus Biologiques, Collège de France−CNRS−Sorbonne Université, CNRS UMR 8229, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Debajyoti Pramanik
- Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes, CNRS, CEA Fundamental Research Division, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
| | - Souvik Roy
- Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes, CNRS, CEA Fundamental Research Division, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
| | - Edward J. Reijerse
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
| | - Florian Wittkamp
- Inorganic Chemistry I, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Vincent Artero
- Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes, CNRS, CEA Fundamental Research Division, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
| | - Wolfgang Lubitz
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
| | - Marc Fontecave
- Laboratoire de Chimie des Processus Biologiques, Collège de France−CNRS−Sorbonne Université, CNRS UMR 8229, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France
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26
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Esmieu C, Guo M, Redman HJ, Lundberg M, Berggren G. Synthesis of a miniaturized [FeFe] hydrogenase model system. Dalton Trans 2019; 48:2280-2284. [PMID: 30667428 PMCID: PMC6374738 DOI: 10.1039/c8dt05085f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 01/14/2019] [Indexed: 01/24/2023]
Abstract
The reaction occurring during artificial maturation of [FeFe] hydrogenase has been recreated using molecular systems. The formation of a miniaturized [FeFe] hydrogenase model system, generated through the combination of a [4Fe4S] cluster binding oligopeptide and an organometallic Fe complex, has been monitored by a range of spectroscopic techniques. A structure of the final assembly is suggested based on EPR and FTIR spectroscopy in combination with DFT calculations. The capacity of this novel H-cluster model to catalyze H2 production in aqueous media at mild potentials is verified in chemical assays.
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Affiliation(s)
- Charlène Esmieu
- Molecular Biomimetics
, Department of Chemistry – Ångström Laboratory
, Uppsala University
,
75120 Uppsala
, Sweden
.
| | - Meiyuan Guo
- Theoretical Chemistry
, Department of Chemistry – Ångström Laboratory
, Uppsala University
,
75120 Uppsala
, Sweden
.
| | - Holly J. Redman
- Molecular Biomimetics
, Department of Chemistry – Ångström Laboratory
, Uppsala University
,
75120 Uppsala
, Sweden
.
| | - Marcus Lundberg
- Theoretical Chemistry
, Department of Chemistry – Ångström Laboratory
, Uppsala University
,
75120 Uppsala
, Sweden
.
| | - Gustav Berggren
- Molecular Biomimetics
, Department of Chemistry – Ångström Laboratory
, Uppsala University
,
75120 Uppsala
, Sweden
.
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27
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He J, Gao F, Li YL, Liu XF, Wu H, Jiang ZQ, Wu HK. Synthesis, characterization and electrochemistry of diiron 1,2-dithiolate complexes with a trans-cinnamate ester. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1569641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Jiao He
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Fan Gao
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Xu-Feng Liu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Hao Wu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Zhong-Qing Jiang
- Key Laboratory of ATMMT Ministry of Education, Department of Physics, Zhejiang Sci-Tech University, Hangzhou, China
| | - Hong-Ke Wu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
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28
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Oudsen JPH, Venderbosch B, Martin DJ, Korstanje TJ, Reek JNH, Tromp M. Spectroscopic and theoretical investigation of the [Fe2(bdt)(CO)6] hydrogenase mimic and some catalyst intermediates. Phys Chem Chem Phys 2019; 21:14638-14645. [DOI: 10.1039/c9cp01393h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In [Fe–Fe] hydrogenase mimic systems the ene-1,2-dithiolene ligands play an important role in the stabilisation of the redox-active metal center.
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Affiliation(s)
- J. P. H. Oudsen
- Sustainable Materials Characterization
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - B. Venderbosch
- Sustainable Materials Characterization
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - D. J. Martin
- Sustainable Materials Characterization
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - T. J. Korstanje
- Sustainable Materials Characterization
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - J. N. H. Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - M. Tromp
- Sustainable Materials Characterization
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
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29
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Song LC, Feng L, Guo YQ. Hydrophilic quaternary ammonium-group-containing [FeFe]H2ase models prepared by quaternization of the pyridyl N atoms in pyridylazadiphosphine- and pyridylmethylazadiphosphine-bridged diiron complexes with various electrophiles. Dalton Trans 2019; 48:1443-1453. [DOI: 10.1039/c8dt04211j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The first aromatic quaternary ammonium-group-containing [FeFe]H2ase models have been prepared and some of them found to be catalysts for H2 production under CV conditions.
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Affiliation(s)
- Li-Cheng Song
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Li Feng
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Yuan-Qiang Guo
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
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30
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Duan J, Senger M, Esselborn J, Engelbrecht V, Wittkamp F, Apfel UP, Hofmann E, Stripp ST, Happe T, Winkler M. Crystallographic and spectroscopic assignment of the proton transfer pathway in [FeFe]-hydrogenases. Nat Commun 2018; 9:4726. [PMID: 30413719 PMCID: PMC6226526 DOI: 10.1038/s41467-018-07140-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/18/2018] [Indexed: 11/29/2022] Open
Abstract
The unmatched catalytic turnover rates of [FeFe]-hydrogenases require an exceptionally efficient proton-transfer (PT) pathway to shuttle protons as substrates or products between bulk water and catalytic center. For clostridial [FeFe]-hydrogenase CpI such a pathway has been proposed and analyzed, but mainly on a theoretical basis. Here, eleven enzyme variants of two different [FeFe]-hydrogenases (CpI and HydA1) with substitutions in the presumptive PT-pathway are examined kinetically, spectroscopically, and crystallographically to provide solid experimental proof for its role in hydrogen-turnover. Targeting key residues of the PT-pathway by site directed mutagenesis significantly alters the pH-activity profile of these variants and in presence of H2 their cofactor is trapped in an intermediate state indicative of precluded proton-transfer. Furthermore, crystal structures coherently explain the individual levels of residual activity, demonstrating e.g. how trapped H2O molecules rescue the interrupted PT-pathway. These features provide conclusive evidence that the targeted positions are indeed vital for catalytic proton-transfer. [FeFe]-hydrogenases catalyze H2-evolution and -oxidation at very high turnover-rates. Here the authors provide experimental evidence for the proposed proton-transfer (PT) pathway by kinetically, spectroscopically, and crystallographically characterizing eleven mutants from the two [FeFe]-hydrogenases CpI and HydA1.
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Affiliation(s)
- Jifu Duan
- Department of Plant Biochemistry, Photobiotechnology, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Moritz Senger
- Department of Physics, Experimental Molecular Biophysics, Freie Universität Berlin, 14195, Berlin, Germany
| | - Julian Esselborn
- Department of Plant Biochemistry, Photobiotechnology, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Vera Engelbrecht
- Department of Plant Biochemistry, Photobiotechnology, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Florian Wittkamp
- Department of Chemistry and Biochemistry, Inorganic Chemistry Ι, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Ulf-Peter Apfel
- Department of Chemistry and Biochemistry, Inorganic Chemistry Ι, Ruhr-Universität Bochum, 44801, Bochum, Germany.,Fraunhofer UMSICHT, Osterfelder Straße, 346047, Oberhausen, Germany
| | - Eckhard Hofmann
- Department of Biophysics, Protein Crystallography, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Sven T Stripp
- Department of Physics, Experimental Molecular Biophysics, Freie Universität Berlin, 14195, Berlin, Germany
| | - Thomas Happe
- Department of Plant Biochemistry, Photobiotechnology, Ruhr-Universität Bochum, 44801, Bochum, Germany.
| | - Martin Winkler
- Department of Plant Biochemistry, Photobiotechnology, Ruhr-Universität Bochum, 44801, Bochum, Germany.
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31
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Abul-Futouh H, El-khateeb M, Görls H, Weigand W. [FeFe]-hydrogenase H-cluster mimics mediated by mixed (S, Se) and (S, Te) bridging moieties: Insight into molecular structures and electrochemical characteristics. HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Mohammad El-khateeb
- Chemistry Department; Jordan University of Science and Technology; Irbid Jordan
| | - Helmar Görls
- Institute for Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Jena Germany
| | - Wolfgang Weigand
- Institute for Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Jena Germany
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32
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Himiyama T, Waki M, Esquivel D, Onoda A, Hayashi T, Van Der Voort P, Inagaki S. A Heterogeneous Hydrogen‐Evolution Catalyst Based on a Mesoporous Organosilica with a Diiron Catalytic Center Modelling [FeFe]‐Hydrogenase. ChemCatChem 2018. [DOI: 10.1002/cctc.201801257] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tomoki Himiyama
- Toyota Central R&D Laboratories, Inc. Nagakute 480-1192 Japan
| | - Minoru Waki
- Toyota Central R&D Laboratories, Inc. Nagakute 480-1192 Japan
| | - Dolores Esquivel
- Departamento de Química Orgánica Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN Facultad de CienciasUniversidad de Córdoba Córdoba E-14071 Spain
| | - Akira Onoda
- Department of Applied Chemistry Graduate School of EngineeringOsaka University Suita 565-0871 Japan
| | - Takashi Hayashi
- Department of Applied Chemistry Graduate School of EngineeringOsaka University Suita 565-0871 Japan
| | - Pascal Van Der Voort
- COMOC Department of Inorganic and Physical ChemistryGhent University Ghent B-9000 Belgium
| | - Shinji Inagaki
- Toyota Central R&D Laboratories, Inc. Nagakute 480-1192 Japan
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33
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Harb MK, Alshurafa H, El-khateeb M, Al-Zuheiri A, Görls H, Abul-Futouh H, Weigand W. [FeFe]-Hydrogenase Models Containing Long Diselenolato Linkers. ChemistrySelect 2018. [DOI: 10.1002/slct.201801704] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mohammad K. Harb
- Department of Pharmacy; Al-Zytoonah University of Jordan; P.O. Box 130 Amman 11733 Jordan
| | - Hadil Alshurafa
- Chemistry Department; Jordan University of Science and Technology; 22110 Irbid Jordan
| | - Mohammad El-khateeb
- Chemistry Department; Jordan University of Science and Technology; 22110 Irbid Jordan
| | - Aya Al-Zuheiri
- Department of Pharmacy; Al-Zytoonah University of Jordan; P.O. Box 130 Amman 11733 Jordan
| | - Helmar Görls
- Institute for Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humbodt-Straße 8 07743 Jena Germany
| | - Hassan Abul-Futouh
- Institute for Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humbodt-Straße 8 07743 Jena Germany
| | - Wolfgang Weigand
- Institute for Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humbodt-Straße 8 07743 Jena Germany
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34
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Sil D, Martinez Z, Ding S, Bhuvanesh N, Darensbourg DJ, Hall MB, Darensbourg MY. Cyanide Docking and Linkage Isomerism in Models for the Artificial [FeFe]-Hydrogenase Maturation Process. J Am Chem Soc 2018; 140:9904-9911. [DOI: 10.1021/jacs.8b04189] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Debangsu Sil
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Zachary Martinez
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Shengda Ding
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Donald J. Darensbourg
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Michael B. Hall
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Marcetta Y. Darensbourg
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
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35
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Lu DT, He J, Yu XY, Liu XF, Li YL, Jiang ZQ. Diiron ethanedithiolate complexes with pendant ferrocene: Synthesis, characterization and electrochemistry. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Stromberg CJ, Heilweil EJ. Ultrafast Photodynamics of Cyano-Functionalized [FeFe] Hydrogenase Model Compounds. J Phys Chem A 2018; 122:4023-4030. [PMID: 29652502 PMCID: PMC6051340 DOI: 10.1021/acs.jpca.8b00661] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[FeFe] hydrogenases are efficient enzymes that produce hydrogen gas under mild conditions. Synthetic model compounds containing all CO or mixed CO/PMe3 ligands were previously studied by us and others with ultrafast ultraviolet or visible pump-infrared probe spectroscopy in an effort to better understand the function and interactions of the active site with light. Studies of anionic species containing cyano groups, which more closely match the biological active site, have been elusive. In this work, two model compounds dissolved in room-temperature acetonitrile solution were examined: [Fe2(μ-S2C3H6)(CO)4(CN)2]2- (1) and [Fe2(μ-S2C2H4)(CO)4(CN)2]2- (2). These species exhibit long-lived transient signals consistent with loss of one CO ligand with potential isomerization of newly formed ground electronic state photoproducts, as previously observed with all-CO and CO/PMe3-containing models. We find no evidence for fast (ca. 150 ps) relaxation seen in the all-CO and CO/PMe3 compounds because of the absence of the metal-to-metal charge transfer band in the cyano-functionalized models. These results indicate that incorporation of cyano ligands may significantly alter the electronic properties and photoproducts produced immediately after photoexcitation, which may influence the catalytic activity of model compounds when attached to photosensitizers.
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Affiliation(s)
- Christopher J. Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Avenue, Frederick, Maryland 21701-8524, United States
| | - Edwin J. Heilweil
- Engineering Physics Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8443 United States
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37
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Zhao PH, Ma ZY, Hu MY, He J, Wang YZ, Jing XB, Chen HY, Wang Z, Li YL. PNP-Chelated and -Bridged Diiron Dithiolate Complexes Fe2(μ-pdt)(CO)4{(Ph2P)2NR} Together with Related Monophosphine Complexes for the [2Fe]H Subsite of [FeFe]-Hydrogenases: Preparation, Structure, and Electrocatalysis. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00030] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Pei-Hua Zhao
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People’s Republic of China
| | - Zhong-Yi Ma
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People’s Republic of China
| | - Meng-Yuan Hu
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People’s Republic of China
| | - Jiao He
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, People’s Republic of China
| | - Yan-Zhong Wang
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People’s Republic of China
| | - Xing-Bin Jing
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People’s Republic of China
| | - Hui-Yu Chen
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, People’s Republic of China
| | - Zheng Wang
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, People’s Republic of China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, People’s Republic of China
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38
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Pandey IK, Natarajan M, Faujdar H, Hussain F, Stein M, Kaur-Ghumaan S. Intramolecular stabilization of a catalytic [FeFe]-hydrogenase mimic investigated by experiment and theory. Dalton Trans 2018; 47:4941-4949. [PMID: 29553150 DOI: 10.1039/c7dt04837h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The mono-substituted complex [Fe2(CO)5(μ-naphthalene-2-thiolate)2(P(PhOMe-p)3)] was prepared taking after the structural principles from both [NiFe] and [FeFe]-hydrogenase enzymes. Crystal structures are reported for this complex and the all carbonyl analogue. The bridging naphthalene thiolates resemble μ-bridging cysteine amino acids. One of the naphthyl moieties forms π-π stacking interactions with the terminal bulky phosphine ligand in the crystal structure and in calculations. This interaction stabilizes the reduced and protonated forms during electrocatalytic proton reduction in the presence of acetic acid and hinders the rotation of the phosphine ligand. The intramolecular π-π stabilization, the electrochemistry and the mechanism of the hydrogen evolution reaction were investigated using computational approaches.
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Affiliation(s)
| | - Mookan Natarajan
- Department of Chemistry, University of Delhi, Delhi 110007, India.
| | - Hemlata Faujdar
- Department of Chemistry, University of Delhi, Delhi 110007, India.
| | - Firasat Hussain
- Department of Chemistry, University of Delhi, Delhi 110007, India.
| | - Matthias Stein
- Max-Planck-Institute for Dynamics of Complex Technical Systems, Molecular Simulations and Design Group, Sandtorstrasse 1, 39106 Magdeburg, Germany.
| | - Sandeep Kaur-Ghumaan
- Department of Chemistry, University of Delhi, Delhi 110007, India. and Max-Planck-Institute for Dynamics of Complex Technical Systems, Molecular Simulations and Design Group, Sandtorstrasse 1, 39106 Magdeburg, Germany.
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39
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Electrochemical Proton Reductions Catalyzed by the Simpler Hexacoordinate Iron Compounds as Functional Mimics of the Active Site in [FeFe] Hydrogenase. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-017-0453-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Meyer RL, Zhandosova AD, Biser TM, Heilweil EJ, Stromberg CJ. Photochemical Dynamics of a Trimethyl-Phosphine Derivatized [FeFe]-Hydrogenase Model Compound. Chem Phys 2018; 512. [PMID: 30983684 DOI: 10.1016/j.chemphys.2017.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Though there have been many studies on photosensitizers coupled to model complexes of the [FeFe]-hydrogenases, few have looked at how the models react upon exposure to light. To extract photoreaction information, ultrafast time-resolved UV/visible pump, IR probe spectroscopy was performed on Fe2(μ-S2C2H4)(CO)4(PMe3)2 (2b) dissolved in heptane and acetonitrile and the photochemical dynamics were determined. Excitation with 532 and 355 nm light produces bleaches and new absorptions that decay to half their original intensity with time constants of 300 ± 120 ps and 380 ± 210 ps in heptane and acetonitrile, respectively. These features persist to the microsecond timescale. The dynamics of 2b are assigned to formation of an initial set of photoproducts, which were a mixture of excited-state tricarbonyl isomers. These isomers decay into another set of long-lived photoproducts in which approximately half the excited-state tricarbonyl isomers recombine with CO to form another complex mixture of tricarbonyl and tetracarbonyl isomers.
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Affiliation(s)
- Rachel L Meyer
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA.,Department of Chemistry, University of Rochester, RC Box 270216, Rochester, NY 14627
| | - Annette D Zhandosova
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA.,Touro College of Osteopathic Medicine, 230 West 125 St., New York, NY 10027
| | - Tara M Biser
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA.,Bloomberg School of Public Health, Johns Hopkins University, 615 N. Wolfe St., Baltimore, MD 21205
| | - Edwin J Heilweil
- Radiation Physics Division, Physical Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8443, USA
| | - Christopher J Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA
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41
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Zhao P, Yu XY, Liu XF, Li YL. Alkyldiphenylphosphine substituted diiron ethanedithiolate or toluenedithiolate complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.10.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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42
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[FeFe]-Hydrogenase and its organic molecule mimics—Artificial and bioengineering application for hydrogenproduction. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2017. [DOI: 10.1016/j.jphotochemrev.2017.09.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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43
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Aminophosphine-substituted diiron dithiolate complexes: Synthesis, crystal structure, and electrocatalytic investigation. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.09.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Abul-Futouh H, Görls H, Weigand W. Synthesis and Electrochemical Investigation of Mono- and Di-phosphite substituted [FeFe]-Hydrogenase H-Cluster Mimics. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700308] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hassan Abul-Futouh
- Institut für Anorganische und Analytische Chemie; Friedrich-Schiller-Universität Jena; Humboldt Str. 8 07743 Jena Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie; Friedrich-Schiller-Universität Jena; Humboldt Str. 8 07743 Jena Germany
| | - Wolfgang Weigand
- Institut für Anorganische und Analytische Chemie; Friedrich-Schiller-Universität Jena; Humboldt Str. 8 07743 Jena Germany
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45
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Abul-Futouh H, Almazahreh LR, Harb MK, Görls H, El-Khateeb M, Weigand W. [FeFe]-Hydrogenase H-Cluster Mimics with Various -S(CH 2) nS- Linker Lengths (n = 2-8): A Systematic Study. Inorg Chem 2017; 56:10437-10451. [PMID: 28809489 DOI: 10.1021/acs.inorgchem.7b01398] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of the nature of the dithiolato ligand on the physical and electrochemical properties of synthetic H-cluster mimics of the [FeFe]-hydrogenase is still of significant concern. In this report we describe the cyclization of various alkanedithiols to afford cyclic disulfide, tetrasulfide, and hexasulfide compounds. The latter compounds were used as proligands for the synthesis of a series of [FeFe]-hydrogenase H-cluster mimics having the general formulas [Fe2(CO)6{μ-S(CH2)nS}] (n = 4-8), [Fe2(CO)6{μ-S(CH2)nS}]2 (n = 6-8), and [Fe2(CO)6{(μ-S(CH2)nS)2}] (n = 6-8). The resulting complexes were characterized by 1H and 13C{1H} NMR and IR spectroscopic techniques, mass spectrometry, and elemental analysis as well as X-ray analysis. The purpose of this research was to study the influence of the systematic increase of n from 2 to 7 on the redox potentials of the models and the catalytic ability in the presence of acetic acid (AcOH) by applying cyclic voltammetry.
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Affiliation(s)
- Hassan Abul-Futouh
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena , Humboldt Str. 8, 07743 Jena, Germany
| | - Laith R Almazahreh
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena , Humboldt Str. 8, 07743 Jena, Germany.,ERCOSPLAN Ingenieurbüro Anlagentechnik GmbH , Arnstädter Straße 28, 99096 Erfurt, Germany
| | - Mohammad Kamal Harb
- Department of Pharmacy, Al-Zytoonah University of Jordan , P.O. Box 130, Amman 11733, Jordan
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena , Humboldt Str. 8, 07743 Jena, Germany
| | - Mohammad El-Khateeb
- Chemistry Department, Jordan University of Science and Technology , Irbid 22110, Jordan
| | - Wolfgang Weigand
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena , Humboldt Str. 8, 07743 Jena, Germany
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46
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Plotzitzka J, Kleeberg C. [(18-C-6)K][(N≡C)Cu I-SiMe 2Ph], a Potassium Silylcyanocuprate as a Catalyst Model for Silylation Reactions with Silylboranes: Syntheses, Structures, and Catalytic Properties. Inorg Chem 2017; 56:6671-6680. [PMID: 28509537 DOI: 10.1021/acs.inorgchem.7b00749] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
CuI-catalyzed silylation reactions involving silylboranes (in particular, pinB-SiMe2Ph (1)) as silyl sources have recently gained considerable attention. One of the most efficient and versatile and yet simplest catalyst systems consists of CuCN/NaOMe; however, nothing is known about the catalytically relevant species. Using an NHC-based model catalyst, copper silyl complexes of the type [(NHC)Cu-SiMe2Ph] have been established to be crucial species in these catalytic processes. The well-defined and spectroscopically and structurally characterized complex [(18-C-6)K][NC-Cu-OtBu] (2), as a model for the catalytic system, CuCN/NaOMe, shows comparable catalytic activity toward established, exemplary substrates (aldehydes, imines, α,β-unsaturated carbonyls) and in extension allows the efficient silylation of ketones. In addition, a number of peculiarities of the catalytic reaction are readily rationalized on the basis of the mechanistic insight already established using [(NHC)Cu-SiMe2Ph] as a model catalyst. Analogously to the NHC model system, the reaction of 2 with the silylborane 1 furnishes the silylcyanocuprate [(18-C-6)K][NC-Cu-SiMe2Ph] (3) as a potential crucial intermediate in these silylation reactions also suggesting mechanistic similarities between (NHC)Cu- and CuCN/NaOMe-based catalyst systems. Moreover, 3 and [(NHC)Cu-SiMe2Ph] complexes also share structurally distinctive features. In the solid state 3 either exists as a linear, two-coordinated copper complex or, depending on the conditions of crystallization, forms binuclear μ-silyl bridged dimers exhibiting very short Cu···Cu distances. Both structural motifs are also known for [(NHC)Cu-SiR3] complexes. These findings give an initial insight into the versatile structural chemistry of certain silylcyanocuprates; in particular, the finding of dinuclear silylcuprates gives rise to the question whether these dimeric species are of mechanistic relevance for the catalytic processes. However, all peculiarities of the investigated catalytic reaction can readily be rationalized on the basis of the mechanistic details established using (NHC)Cu model complexes.
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Affiliation(s)
- Jacqueline Plotzitzka
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
| | - Christian Kleeberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
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47
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Cao J, Zhou Y. Excited state relaxation processes of H 2-evolving Ru-Pd supramolecular photocatalysts containing a linear or non-linear bridge: a DFT and TDDFT study. Phys Chem Chem Phys 2017; 19:11529-11539. [PMID: 28425524 DOI: 10.1039/c6cp07857e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In this study, the early-time excited state relaxation processes of bimetallic Ru-Pd supramolecular photocatalysts containing a linear 2,2':5',2''-terpyridine or a nonlinear 2,2':6',2''-terpyridine bridging ligand (BL) were investigated by density functional theory (DFT) and time-dependent DFT (TDDFT) approaches. The bridge based metal-to-ligand charge transfer triplet (3MLCT) state of the metal complex containing a linear bridging ligand was calculated to be the lowest energy triplet (T1) state which is closely related to the photocatalytic H2 production, while for that having a nonlinear bridging ligand, the T1 state is a Ru metal-centered (MC) triplet (3MCRu) state that is short-lived and rapidly decays to the ground electronic state (S0). Our simulation provides an alternative explanation for the smaller interligand electron transfer (ILET) rate in the Ru-Pd complex containing a linear bridge compared to the corresponding monometal Ru complex. Based on the calculation, we also suggest that the successive 3MLCT → 3MCRu → S0 conversion is responsible for the inefficiency of the Ru-Pd complex containing nonlinear bridge as a photocatalyst for H2 production. This study provides theoretical insights into the key steps of the photoinduced processes of the bimetallic H2-evolving supramolecular photocatalyst.
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Affiliation(s)
- Jun Cao
- Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Synergetic Innovation Center of Scientific Big Data for Advanced Manufacturing Technology, Guizhou Education University, Guiyang, Guizhou 550018, China
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48
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Pullen S, Roy S, Ott S. [FeFe] Hydrogenase active site model chemistry in a UiO-66 metal-organic framework. Chem Commun (Camb) 2017; 53:5227-5230. [PMID: 28443863 PMCID: PMC6095454 DOI: 10.1039/c7cc01620d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of [Fe2(dcbdt)(CO)6] (1) confined in a UiO-66(Zr) metal-organic framework towards CO ligand substitutions with phosphines of different sizes was investigated. The reaction with smaller phosphines (PX3, X = Me, Et) is more selective compared to analogous reactions in homogenous solution phase, and two CO ligands at up to 80% of all [FeFe] sites in UiO-66-1 are replaced. The produced [Fe2(dcbdt)(CO)4(PX3)2] complexes in the UiO-66 matrix behave like typical [FeFe] hydrogenase active site model complexes, are reduced at more cathodic potentials than their hexacarbonyl analogues, and form bridging hydrides under acidic conditions.
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Affiliation(s)
- Sonja Pullen
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden.
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49
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Li RX, Liu XF, Liu T, Yin YB, Zhou Y, Mei SK, Yan J. Electrocatalytic properties of [FeFe]-hydrogenases models and visible-light-driven hydrogen evolution efficiency promotion with porphyrin functionalized graphene nanocomposite. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.03.216] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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He J, Deng CL, Li Y, Li YL, Wu Y, Zou LK, Mu C, Luo Q, Xie B, Wei J, Hu JW, Zhao PH, Zheng W. A New Route to the Synthesis of Phosphine-Substituted Diiron Aza- and Oxadithiolate Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00040] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jiao He
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Cheng-Long Deng
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Yao Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Yu Wu
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Li-Ke Zou
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Chao Mu
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Qiang Luo
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Bin Xie
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Jian Wei
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Jing-Wen Hu
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
| | - Pei-Hua Zhao
- School
of Materials Science and Engineering, North University of China, Taiyuan 030051, P. R. China
| | - Wen Zheng
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, P. R. China
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