1
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Arunkumar A, Ju XH. Computational method on highly efficient D-π-A-π-D-based different molecular acceptors for organic solar cells applications and non-linear optical behaviour. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 317:124391. [PMID: 38704998 DOI: 10.1016/j.saa.2024.124391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/22/2024] [Accepted: 04/29/2024] [Indexed: 05/07/2024]
Abstract
Eight molecular structures (BT-A1 to BT-A8) with high-performance non-fullerene acceptor (NFA) were selected for organic solar cells (OSCs) and non-linear optical (NLO) applications. Their electronic, photovoltaic (PV) and optoelectronic properties were tuned by adding powerful electron-withdrawing groups to the acceptor (A) of the D-π-A-π-D structure. Using time-dependent density functional theory (TD-DFT) techniques, based on the laws of quantum chemical calculations, the absorption spectra, stability of the highest and lowest-energy molecular orbitals (HOMO/LUMOs), electron density, intramolecular charge transfer (ICT), transition density matrix (TDM), were examined. The binding energy (Eb) and density of states (DOS) were probed to realize the optoelectronic analysis of the structures BT-A1 to BT-A8. Noncovalent interactions (NCIs) based on a reduced density gradient (RDG) were used to describe the nature and strength of D-A interactions in the molecules BT-A1 to BT-A8. The new refined molecules BT-A1 to BT-A8 exhibited strong absorbance bands between 408-721 nm and high electron transfer contribution (ETC) ranges between 87-96 %, along with the smallest excitation energies (Ex) between 1.71-3.55 eV in the solvent dichloromethane. Dipolar moment strengths ranging from 0.38 to 4.72 Debye in both the excited and ground states have determined with good solubility properties of BT-A1 to BT-A8 in polar solvent. Highly effective charge mobilities and prevention of charge recombination have been demonstrated by the electron (0.18-0.41 eV) and hole RE values (0.13-0.89 eV) for the new compounds. Power conversion efficiencies (PCE) of BT-A1 to BT-A8 were nearly the same because of better outcomes compared to the molecules in the BT. Compared to poly[4.8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b: 4,5-b']dithiophene-2,6- diyl-alt-(4-2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)] (PTB7-Th), the open circuit voltages (Voc) of compounds BT-A1 to BT-A8 were ranged from 1.52 to 2.13 eV. The polarizability (α) and hyperpolarizability (β) of the molecules BT-A1 to BT-A8 were used to determine the non-linear optical (NLO) properties. The results showed that BT-A2, BT-A6 and BT-A7 have good NLO activity. This computational analysis demonstrates the superiority of the molecules with NFA. Hence the compounds are advised for the use in production of high-performance OSCs and NLO activity.
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Affiliation(s)
- Ammasi Arunkumar
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Xue-Hai Ju
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
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2
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Narayana BK, Keri RS, Hanumantharayudu ND, Budagumpi S. Metal‐Metal Interactions in Bi‐, Tri‐ and Multinuclear Fe, Ru and Os N‐Heterocyclic Carbene Complexes and their Catalytic Applications. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Brinda Kadur Narayana
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562 112 Karnataka India
| | - Rangappa S. Keri
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562 112 Karnataka India
| | | | - Srinivasa Budagumpi
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562 112 Karnataka India
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3
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Javed M, Farhat A, Jabeen S, Khera RA, Khalid M, Iqbal J. Optoelectronic properties of naphthalene bis-benzimidazole based derivatives and their photovoltaic applications. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113373] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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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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5
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Bilal Ahmed Siddique M, Hussain R, Ali Siddique S, Yasir Mehboob M, Irshad Z, Iqbal J, Adnan M. Designing Triphenylamine‐Configured Donor Materials with Promising Photovoltaic Properties for Highly Efficient Organic Solar Cells. ChemistrySelect 2020. [DOI: 10.1002/slct.202001989] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Riaz Hussain
- Department of Chemistry University of Okara Okara 56300 Pakistan
| | | | | | - Zobia Irshad
- Graduate School, Department of Chemistry Chosun University Gwangju 501-759 R. O. Korea
| | - Javed Iqbal
- Department of Chemistry University of Agriculture 38000 Faisalabad Pakistan
| | - Muhammad Adnan
- Graduate School, Department of Chemistry Chosun University Gwangju 501-759 R. O. Korea
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6
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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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7
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Vogiatzis KD, Polynski MV, Kirkland JK, Townsend J, Hashemi A, Liu C, Pidko EA. Computational Approach to Molecular Catalysis by 3d Transition Metals: Challenges and Opportunities. Chem Rev 2019; 119:2453-2523. [PMID: 30376310 PMCID: PMC6396130 DOI: 10.1021/acs.chemrev.8b00361] [Citation(s) in RCA: 214] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Indexed: 12/28/2022]
Abstract
Computational chemistry provides a versatile toolbox for studying mechanistic details of catalytic reactions and holds promise to deliver practical strategies to enable the rational in silico catalyst design. The versatile reactivity and nontrivial electronic structure effects, common for systems based on 3d transition metals, introduce additional complexity that may represent a particular challenge to the standard computational strategies. In this review, we discuss the challenges and capabilities of modern electronic structure methods for studying the reaction mechanisms promoted by 3d transition metal molecular catalysts. Particular focus will be placed on the ways of addressing the multiconfigurational problem in electronic structure calculations and the role of expert bias in the practical utilization of the available methods. The development of density functionals designed to address transition metals is also discussed. Special emphasis is placed on the methods that account for solvation effects and the multicomponent nature of practical catalytic systems. This is followed by an overview of recent computational studies addressing the mechanistic complexity of catalytic processes by molecular catalysts based on 3d metals. Cases that involve noninnocent ligands, multicomponent reaction systems, metal-ligand and metal-metal cooperativity, as well as modeling complex catalytic systems such as metal-organic frameworks are presented. Conventionally, computational studies on catalytic mechanisms are heavily dependent on the chemical intuition and expert input of the researcher. Recent developments in advanced automated methods for reaction path analysis hold promise for eliminating such human-bias from computational catalysis studies. A brief overview of these approaches is presented in the final section of the review. The paper is closed with general concluding remarks.
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Affiliation(s)
| | | | - Justin K. Kirkland
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jacob Townsend
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ali Hashemi
- Inorganic
Systems Engineering group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Chong Liu
- Inorganic
Systems Engineering group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Evgeny A. Pidko
- TheoMAT
group, ITMO University, Lomonosova 9, St. Petersburg 191002, Russia
- Inorganic
Systems Engineering group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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8
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Molecular designing of four high performance pyrazine-based non-fullerene acceptor materials with naphthalene diimide-based small organic solar cells. J Mol Model 2019; 25:50. [DOI: 10.1007/s00894-019-3932-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 01/10/2019] [Indexed: 10/27/2022]
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9
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Abstract
Biological metal sites are optimized for function by conformational properties of the protein macroligand.
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Affiliation(s)
- Wilfred R. Hagen
- Delft University of Technology
- Department of Biotechnology
- 2629HZ Delft
- The Netherlands
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10
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Hammes-Schiffer S. Proton-Coupled Electron Transfer: Moving Together and Charging Forward. J Am Chem Soc 2015; 137:8860-71. [PMID: 26110700 PMCID: PMC4601483 DOI: 10.1021/jacs.5b04087] [Citation(s) in RCA: 291] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Indexed: 12/24/2022]
Abstract
Proton-coupled electron transfer (PCET) is ubiquitous throughout chemistry and biology. This Perspective discusses recent advances and current challenges in the field of PCET, with an emphasis on the role of theory and computation. The fundamental theoretical concepts are summarized, and expressions for rate constants and kinetic isotope effects are provided. Computational methods for calculating reduction potentials and pKa's for molecular electrocatalysts, as well as insights into linear correlations and non-innocent ligands, are also described. In addition, computational methods for simulating the nonadiabatic dynamics of photoexcited PCET are discussed. Representative applications to PCET in solution, proteins, electrochemistry, and photoinduced processes are presented, highlighting the interplay between theoretical and experimental studies. The current challenges and suggested future directions are outlined for each type of application, concluding with an overall view to the future.
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Affiliation(s)
- Sharon Hammes-Schiffer
- Department of Chemistry, University of
Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United
States
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11
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Almazahreh LR, Imhof W, Talarmin J, Schollhammer P, Görls H, El-khateeb M, Weigand W. Ligand effects on the electrochemical behavior of [Fe2(CO)5(L){μ-(SCH2)2(Ph)PO}] (L = PPh3, P(OEt)3) hydrogenase model complexes. Dalton Trans 2015; 44:7177-89. [DOI: 10.1039/c5dt00064e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this paper we study the influence of substituting one CO ligand in [Fe2(CO)6{μ-(SCH2)2(Ph)PO}] (1) by better σ-donors (PPh3(2) and P(OMe)3(3)) in relation to the electrochemical behavior.
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Affiliation(s)
- Laith R. Almazahreh
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- D-07743 Jena
- Germany
| | - Wolfgang Imhof
- Institut für Integrierte Naturwissenschaften
- Universität Koblenz-Landau
- D-56070 Koblenz
- Germany
| | - Jean Talarmin
- UMR CNRS 6521
- Université de Bretagne Occidentale
- 29238 Brest-Cedex
- France
| | | | - Helmar Görls
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- D-07743 Jena
- Germany
| | - Mohammad El-khateeb
- Chemistry Department
- Jordan University of Science and Technology
- 22110 Irbid
- Jordan
| | - Wolfgang Weigand
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- D-07743 Jena
- Germany
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12
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Chouffai D, Capon JF, De Gioia L, Pétillon FY, Schollhammer P, Talarmin J, Zampella G. A Diferrous Dithiolate as a Model of the Elusive Hoxinact State of the [FeFe] Hydrogenases: An Electrochemical and Theoretical Dissection of Its Redox Chemistry. Inorg Chem 2014; 54:299-311. [DOI: 10.1021/ic5024746] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dounia Chouffai
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires
et Chimie Analytique, Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Jean-François Capon
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires
et Chimie Analytique, Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Luca De Gioia
- Department
of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza
della Scienza 2, 20126 Milan, Italy
| | - François Y. Pétillon
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires
et Chimie Analytique, Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Philippe Schollhammer
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires
et Chimie Analytique, Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Jean Talarmin
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires
et Chimie Analytique, Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Giuseppe Zampella
- Department
of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza
della Scienza 2, 20126 Milan, Italy
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13
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Zheng D, Wang N, Wang M, Ding S, Ma C, Darensbourg MY, Hall MB, Sun L. Intramolecular Iron-Mediated C–H Bond Heterolysis with an Assist of Pendant Base in a [FeFe]-Hydrogenase Model. J Am Chem Soc 2014; 136:16817-23. [DOI: 10.1021/ja5078014] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Dehua Zheng
- State
Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research
Center on Molecular Devices, Dalian University of Technology (DUT), Dalian 116024, People’s Republic of China
| | - Ning Wang
- Department of Chemistry, Texas A&M University, College Station, Texas 77845, United States
- School
of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, People’s Republic of China
| | - Mei Wang
- State
Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research
Center on Molecular Devices, Dalian University of Technology (DUT), Dalian 116024, People’s Republic of China
| | - Shengda Ding
- Department of Chemistry, Texas A&M University, College Station, Texas 77845, United States
| | - Chengbing Ma
- State
Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou 350002, People’s Republic of China
| | | | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas 77845, United States
| | - Licheng Sun
- State
Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research
Center on Molecular Devices, Dalian University of Technology (DUT), Dalian 116024, People’s Republic of China
- Department
of Chemistry, KTH Royal Institute of Technology, Stockholm 10044, Sweden
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14
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Huynh MT, Wang W, Rauchfuss TB, Hammes-Schiffer S. Computational investigation of [FeFe]-hydrogenase models: characterization of singly and doubly protonated intermediates and mechanistic insights. Inorg Chem 2014; 53:10301-11. [PMID: 25207842 PMCID: PMC4186672 DOI: 10.1021/ic5013523] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
The [FeFe]-hydrogenase enzymes catalyze
hydrogen oxidation and production efficiently with binuclear Fe metal
centers. Recently the bioinspired H2-producing model system
Fe2(adt)(CO)2(dppv)2 (adt=azadithiolate
and dppv=diphosphine) was synthesized and studied experimentally.
In this system, the azadithiolate bridge facilitates the formation
of a doubly protonated ammonium-hydride species through a proton relay.
Herein computational methods are utilized to examine this system in
the various oxidation states and protonation states along proposed
mechanistic pathways for H2 production. The calculated
results agree well with the experimental data for the geometries,
CO vibrational stretching frequencies, and reduction potentials. The
calculations illustrate that the NH···HFe dihydrogen
bonding distance in the doubly protonated species is highly sensitive
to the effects of ion-pairing between the ammonium and BF4– counterions, which are present in the crystal
structure, in that the inclusion of BF4– counterions leads to a significantly longer dihydrogen bond. The
non-hydride Fe center was found to be the site of reduction for terminal
hydride species and unsymmetric bridging hydride species, whereas
the reduced symmetric bridging hydride species exhibited spin delocalization
between the Fe centers. According to both experimental measurements
and theoretical calculations of the relative pKa values, the Fed center of the neutral species
is more basic than the amine, and the bridging hydride species is
more thermodynamically stable than the terminal hydride species. The
calculations implicate a possible pathway for H2 evolution
that involves an intermediate with H2 weakly bonded to
one Fe, a short H2 distance similar to the molecular bond
length, the spin density delocalized over the two Fe centers, and
a nearly symmetrically bridged CO ligand. Overall, this study illustrates
the mechanistic roles of the ammonium-hydride interaction, flexibility
of the bridging CO ligand, and intramolecular electron transfer between
the Fe centers in the catalytic cycle. Such insights will assist in
the design of more effective bioinspired catalysts for H2 production. Theoretical calculations
in conjunction with supporting experimental data are used to analyze
the mechanistic pathway for hydrogen evolution catalyzed by the bioinspired
model Fe2(adt)(CO)2(dppv)2. This
study elucidates the site of reduction and the pKa values associated with formation of the singly and doubly
protonated species, as well as the roles of the ammonium-hydride interaction,
flexibility of the bridging CO ligand, and intramolecular electron
transfer between the Fe centers in the catalytic cycle for H2 production.
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Affiliation(s)
- Mioy T Huynh
- Department of Chemistry, 600 South Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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15
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Mathur P, Rai DK, Joshi RK, Jha B, Mobin SM. Synthesis of Novel Allene-Coordinated, Phosphido-Bridged Ru2Pt Clusters Involving Enyne to Allene Transformation. Organometallics 2014. [DOI: 10.1021/om500561b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Pradeep Mathur
- School
of Sciences, Indian Institute of Technology Indore, Khandwa Road, Indore 452017, India
| | - Dhirendra K. Rai
- School
of Sciences, Indian Institute of Technology Indore, Khandwa Road, Indore 452017, India
| | - Raj K. Joshi
- Department
of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India
| | | | - Shaikh M. Mobin
- School
of Sciences, Indian Institute of Technology Indore, Khandwa Road, Indore 452017, India
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16
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Rahaman A, Ghosh S, Unwin DG, Basak-Modi S, Holt KB, Kabir SE, Nordlander E, Richmond MG, Hogarth G. Bioinspired Hydrogenase Models: The Mixed-Valence Triiron Complex [Fe 3(CO) 7(μ-edt) 2] and Phosphine Derivatives [Fe 3(CO) 7-x (PPh 3) x (μ-edt) 2] ( x = 1, 2) and [Fe 3(CO) 5(κ 2-diphosphine)(μ-edt) 2] as Proton Reduction Catalysts. Organometallics 2014; 33:1356-1366. [PMID: 24748710 PMCID: PMC3985925 DOI: 10.1021/om400691q] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Indexed: 01/23/2023]
Abstract
The mixed-valence triiron complexes [Fe3(CO)7-x (PPh3) x (μ-edt)2] (x = 0-2; edt = SCH2CH2S) and [Fe3(CO)5(κ2-diphosphine)(μ-edt)2] (diphosphine = dppv, dppe, dppb, dppn) have been prepared and structurally characterized. All adopt an anti arrangement of the dithiolate bridges, and PPh3 substitution occurs at the apical positions of the outer iron atoms, while the diphosphine complexes exist only in the dibasal form in both the solid state and solution. The carbonyl on the central iron atom is semibridging, and this leads to a rotated structure between the bridged diiron center. IR studies reveal that all complexes are inert to protonation by HBF4·Et2O, but addition of acid to the pentacarbonyl complexes results in one-electron oxidation to yield the moderately stable cations [Fe3(CO)5(PPh3)2(μ-edt)2]+ and [Fe3(CO)5(κ2-diphosphine)(μ-edt)2]+, species which also result upon oxidation by [Cp2Fe][PF6]. The electrochemistry of the formally Fe(I)-Fe(II)-Fe(I) complexes has been investigated. Each undergoes a quasi-reversible oxidation, the potential of which is sensitive to phosphine substitution, generally occurring between 0.15 and 0.50 V, although [Fe3(CO)5(PPh3)2(μ-edt)2] is oxidized at -0.05 V. Reduction of all complexes is irreversible and is again sensitive to phosphine substitution, varying between -1.47 V for [Fe3(CO)7(μ-edt)2] and around -1.7 V for phosphine-substituted complexes. In their one-electron-reduced states, all complexes are catalysts for the reduction of protons to hydrogen, the catalytic overpotential being increased upon successive phosphine substitution. In comparison to the diiron complex [Fe2(CO)6(μ-edt)], [Fe3(CO)7(μ-edt)2] catalyzes proton reduction at 0.36 V less negative potentials. Electronic structure calculations have been carried out in order to fully elucidate the nature of the oxidation and reduction processes. In all complexes, the HOMO comprises an iron-iron bonding orbital localized between the two iron atoms not ligated by the semibridging carbonyl, while the LUMO is highly delocalized in nature and is antibonding between both pairs of iron atoms but also contains an antibonding dithiolate interaction.
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Affiliation(s)
- Ahibur Rahaman
- Department of Chemistry, Jahangirnagar
University, Savar, Dhaka 1342, Bangladesh
- Inorganic Chemistry Research Group, Chemical
Physics, Center for Chemistry and Chemical Engineering, Lund University, P.O.
Box 124, SE-22100 Lund, Sweden
| | - Shishir Ghosh
- Department of Chemistry, Jahangirnagar
University, Savar, Dhaka 1342, Bangladesh
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - David G. Unwin
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Sucharita Basak-Modi
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Katherine B. Holt
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Shariff E. Kabir
- Department of Chemistry, Jahangirnagar
University, Savar, Dhaka 1342, Bangladesh
| | - Ebbe Nordlander
- Inorganic Chemistry Research Group, Chemical
Physics, Center for Chemistry and Chemical Engineering, Lund University, P.O.
Box 124, SE-22100 Lund, Sweden
| | - Michael G. Richmond
- Department of Chemistry, University of North Texas, 1155 Union Circle, Box 305070, Denton, Texas 76203, United States
| | - Graeme Hogarth
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Department of Chemistry, King’s College London, Britannia
House, 7 Trinity Street, London SE1 1DB, U.K.
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Riener K, Haslinger S, Raba A, Högerl MP, Cokoja M, Herrmann WA, Kühn FE. Chemistry of Iron N-Heterocyclic Carbene Complexes: Syntheses, Structures, Reactivities, and Catalytic Applications. Chem Rev 2014; 114:5215-72. [DOI: 10.1021/cr4006439] [Citation(s) in RCA: 329] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | | | | | - Manuel P. Högerl
- KAUST Catalysis Center, Division of Physical Sciences & Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
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Zheng D, Wang M, Chen L, Wang N, Cheng M, Sun L. The influence of a S-to-S bridge in diiron dithiolate models on the oxidation reaction: a mimic of the Hairox state of [FeFe]-hydrogenases. Chem Commun (Camb) 2014; 50:9255-8. [DOI: 10.1039/c4cc03583f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A diiron complex replicates the [FeFe]-hydrogenase Hairox state and the reversible interconversion with an FeIFeI model of the Hred state.
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Affiliation(s)
- Dehua Zheng
- State Key Laboratory of Fine Chemicals
- DUT-KTH Joint Education and Research Centre on Molecular Devices
- Dalian University of Technology (DUT)
- Dalian 116024, China
| | - Mei Wang
- State Key Laboratory of Fine Chemicals
- DUT-KTH Joint Education and Research Centre on Molecular Devices
- Dalian University of Technology (DUT)
- Dalian 116024, China
| | - Lin Chen
- State Key Laboratory of Fine Chemicals
- DUT-KTH Joint Education and Research Centre on Molecular Devices
- Dalian University of Technology (DUT)
- Dalian 116024, China
| | - Ning Wang
- State Key Laboratory of Fine Chemicals
- DUT-KTH Joint Education and Research Centre on Molecular Devices
- Dalian University of Technology (DUT)
- Dalian 116024, China
- School of Chemistry and Chemical Engineering
| | - Minglun Cheng
- State Key Laboratory of Fine Chemicals
- DUT-KTH Joint Education and Research Centre on Molecular Devices
- Dalian University of Technology (DUT)
- Dalian 116024, China
| | - Licheng Sun
- State Key Laboratory of Fine Chemicals
- DUT-KTH Joint Education and Research Centre on Molecular Devices
- Dalian University of Technology (DUT)
- Dalian 116024, China
- Department of Chemistry
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19
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Gao H, Huang J, Chen L, Liu R, Chen J. Synthesis, characterization and computational study of heterobimetallic CoFe complexes for mimicking hydrogenase. RSC Adv 2013. [DOI: 10.1039/c2ra22388k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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20
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Schilter D, Rauchfuss TB, Stein M. Connecting [NiFe]- and [FeFe]-hydrogenases: mixed-valence nickel-iron dithiolates with rotated structures. Inorg Chem 2012; 51:8931-41. [PMID: 22838645 PMCID: PMC3432505 DOI: 10.1021/ic300910r] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New mixed-valence iron-nickel dithiolates are described that exhibit structures similar to those of mixed-valence diiron dithiolates. The interaction of tricarbonyl salt [(dppe)Ni(pdt)Fe(CO)(3)]BF(4) ([1]BF(4), where dppe = Ph(2)PCH(2)CH(2)PPh(2) and pdt(2-) = -SCH(2)CH(2)CH(2)S-) with P-donor ligands (L) afforded the substituted derivatives [(dppe)Ni(pdt)Fe(CO)(2)L]BF(4) incorporating L = PHCy(2) ([1a]BF(4)), PPh(NEt(2))(2) ([1b]BF(4)), P(NMe(2))(3) ([1c]BF(4)), P(i-Pr)(3) ([1d]BF(4)), and PCy(3) ([1e]BF(4)). The related precursor [(dcpe)Ni(pdt)Fe(CO)(3)]BF(4) ([2]BF(4), where dcpe = Cy(2)PCH(2)CH(2)PCy(2)) gave the more electron-rich family of compounds [(dcpe)Ni(pdt)Fe(CO)(2)L]BF(4) for L = PPh(2)(2-pyridyl) ([2a]BF(4)), PPh(3) ([2b]BF(4)), and PCy(3) ([2c]BF(4)). For bulky and strongly basic monophosphorus ligands, the salts feature distorted coordination geometries at iron: crystallographic analyses of [1e]BF(4) and [2c]BF(4) showed that they adopt "rotated" Fe(I) centers, in which PCy(3) occupies a basal site and one CO ligand partially bridges the Ni and Fe centers. Like the undistorted mixed-valence derivatives, members of the new class of complexes are described as Ni(II)Fe(I) (S = ½) systems according to electron paramagnetic resonance spectroscopy, although with attenuated (31)P hyperfine interactions. Density functional theory calculations using the BP86, B3LYP, and PBE0 exchange-correlation functionals agree with the structural and spectroscopic data, suggesting that the spin for [1e](+) is mostly localized in a Fe(I)-centered d(z(2)) orbital, orthogonal to the Fe-P bond. The PCy(3) complexes, rare examples of species featuring "rotated" Fe centers, both structurally and spectroscopically incorporate features from homobimetallic mixed-valence diiron dithiolates. Also, when the NiS(2)Fe core of the [NiFe]-hydrogenase active site is reproduced, the "hybrid models" incorporate key features of the two major classes of hydrogenase. Furthermore, cyclic voltammetry experiments suggest that the highly basic phosphine ligands enable a second oxidation corresponding to the couple [(dxpe)Ni(pdt)Fe(CO)(2)L](+/2+). The resulting unsaturated 32e(-) dications represent the closest approach to modeling the highly electrophilic Ni-SI(a) state. In the case of L = PPh(2) (2-pyridyl), chelation of this ligand accompanies the second oxidation.
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Affiliation(s)
- David Schilter
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Goodwin Ave., Urbana, IL 61801
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Goodwin Ave., Urbana, IL 61801
| | - Matthias Stein
- Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstraβe 1, 39106 Magdeburg, Germany
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21
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Chouffai D, Zampella G, Capon JF, Gioia LD, Goff AL, Pétillon FY, Schollhammer P, Talarmin J. Electrochemical and Theoretical Studies of the Impact of the Chelating Ligand on the Reactivity of [Fe2(CO)4(κ2-LL)(μ-pdt)]+ Complexes with Different Substrates (LL = IMe-CH2-IMe, dppe; IMe = 1-Methylimidazol-2-ylidene). Organometallics 2012. [DOI: 10.1021/om201143p] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dounia Chouffai
- UMR CNRS 6521 “Chimie,
Electrochimie Moléculaires et Chimie Analytique”, Université de Bretagne Occidentale, UFR Sciences
et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Giuseppe Zampella
- Department
of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza
1, 20126 Milan, Italy
| | - Jean-François Capon
- UMR CNRS 6521 “Chimie,
Electrochimie Moléculaires et Chimie Analytique”, Université de Bretagne Occidentale, UFR Sciences
et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Luca De Gioia
- Department
of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza
1, 20126 Milan, Italy
| | - Alan Le Goff
- UMR CNRS 6521 “Chimie,
Electrochimie Moléculaires et Chimie Analytique”, Université de Bretagne Occidentale, UFR Sciences
et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - François Y. Pétillon
- UMR CNRS 6521 “Chimie,
Electrochimie Moléculaires et Chimie Analytique”, Université de Bretagne Occidentale, UFR Sciences
et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Philippe Schollhammer
- UMR CNRS 6521 “Chimie,
Electrochimie Moléculaires et Chimie Analytique”, Université de Bretagne Occidentale, UFR Sciences
et Techniques, CS 93837, 29238 Brest-Cedex 3, France
| | - Jean Talarmin
- UMR CNRS 6521 “Chimie,
Electrochimie Moléculaires et Chimie Analytique”, Université de Bretagne Occidentale, UFR Sciences
et Techniques, CS 93837, 29238 Brest-Cedex 3, France
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22
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Zall CM, Zherebetskyy D, Dzubak AL, Bill E, Gagliardi L, Lu CC. A Combined Spectroscopic and Computational Study of a High-Spin S = 7/2 Diiron Complex with a Short Iron–Iron Bond. Inorg Chem 2011; 51:728-36. [DOI: 10.1021/ic202384b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Christopher M. Zall
- Department
of Chemistry, Superconducting Institute, and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis,
Minnesota 55455-0431, United States
| | - Danylo Zherebetskyy
- Department
of Chemistry, Superconducting Institute, and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis,
Minnesota 55455-0431, United States
| | - Allison L. Dzubak
- Department
of Chemistry, Superconducting Institute, and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis,
Minnesota 55455-0431, United States
| | - Eckhard Bill
- Max Planck Institut für Bioanorganische Chemie, Stiftstrasse 34−36,
D-45470 Mülheim an der Ruhr, Germany
| | - Laura Gagliardi
- Department
of Chemistry, Superconducting Institute, and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis,
Minnesota 55455-0431, United States
| | - Connie C. Lu
- Department
of Chemistry, Superconducting Institute, and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis,
Minnesota 55455-0431, United States
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23
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Chouffai D, Zampella G, Capon JF, De Gioia L, Gloaguen F, Pétillon FY, Schollhammer P, Talarmin J. Oxidatively Induced Reactivity of [Fe2(CO)4(κ2-dppe)(μ-pdt)]: an Electrochemical and Theoretical Study of the Structure Change and Ligand Binding Processes. Inorg Chem 2011; 50:12575-85. [DOI: 10.1021/ic201601q] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dounia Chouffai
- UMR CNRS 6521, Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, UFR Sciences et Techniques, Cs 93837, 29238 Brest-Cedex 3, France
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24
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Meunier CF, Yang XY, Rooke JC, Su BL. Biofuel cells Based on the Immobilization of Photosynthetically Active Bioentities. ChemCatChem 2011. [DOI: 10.1002/cctc.201000410] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Harb MK, Apfel U, Sakamoto T, El‐khateeb M, Weigand W. Diiron Dichalcogenolato (Se and Te) Complexes: Models for the Active Site of [FeFe] Hydrogenase. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001112] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mohammad K. Harb
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Straße 2, 07743 Jena, Germany
| | - Ulf‐Peter Apfel
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Straße 2, 07743 Jena, Germany
| | - Takahiro Sakamoto
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ 85721, U.S.A
| | - Mohammad El‐khateeb
- Chemistry Department, Jordan University of Science and Technology, 22110 Irbid, Jordan
| | - Wolfgang Weigand
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Straße 2, 07743 Jena, Germany
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26
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Stiebritz MT, Reiher M. A unifying structural and electronic concept for Hmd and [FeFe] hydrogenase active sites. Inorg Chem 2010; 49:5818-23. [PMID: 20527808 DOI: 10.1021/ic902529c] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The hydrogenases [FeFe] and Hmd feature at first sight rather different active sites. A closer inspection reveals striking similarities, which allow us to define swapped ligand spheres in such a way that the single active iron center of Hmd functions in a first-shell ligand environment resembling the reacting iron atom in [FeFe] hydrogenase and vice versa. These redesigned ligand environments can be conveniently studied with quantum chemical methods and point to general reactivity principles for iron centers with hydrogenase activity.
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Affiliation(s)
- Martin T Stiebritz
- Laboratorium für Physikalische Chemie, ETH Zurich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland
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27
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Harb MK, Görls H, Sakamoto T, Felton GAN, Evans DH, Glass RS, Lichtenberger DL, El-khateeb M, Weigand W. Synthesis and Characterization of [FeFe]-Hydrogenase Models with Bridging Moieties Containing (S, Se) and (S, Te). Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000278] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Surawatanawong P, Hall MB. Density Functional Study of the Thermodynamics of Hydrogen Production by Tetrairon Hexathiolate, Fe4[MeC(CH2S)3]2(CO)8, a Hydrogenase Model. Inorg Chem 2010; 49:5737-47. [DOI: 10.1021/ic100687v] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255
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29
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Bertini L, Greco C, Bruschi M, Fantucci P, De Gioia L. CO Affinity and Bonding Properties of [FeFe] Hydrogenase Active Site Models. A DFT Study. Organometallics 2010. [DOI: 10.1021/om900658b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luca Bertini
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 2, 20126 Milan, Italy
| | - Claudio Greco
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 2, 20126 Milan, Italy
| | - Maurizio Bruschi
- Department of Environmental Sciences, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 1, 20126 Milan, Italy
| | - Piercarlo Fantucci
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 2, 20126 Milan, Italy
| | - Luca De Gioia
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 2, 20126 Milan, Italy
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30
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Harb MK, Apfel UP, Kübel J, Görls H, Felton GAN, Sakamoto T, Evans DH, Glass RS, Lichtenberger DL, El-khateeb M, Weigand W. Preparation and Characterization of Homologous Diiron Dithiolato, Diselenato, and Ditellurato Complexes: [FeFe]-Hydrogenase Models. Organometallics 2009. [DOI: 10.1021/om900675q] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mohammad K. Harb
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany
| | - Ulf-Peter Apfel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany
| | - Joachim Kübel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany
| | - Greg A. N. Felton
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721
| | - Taka Sakamoto
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721
| | - Dennis H. Evans
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721
| | - Richard S. Glass
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721
| | | | - Mohammad El-khateeb
- Chemistry Department, Jordan University of Science and Technology, 22110 Irbid, Jordan
| | - Wolfgang Weigand
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, August-Bebel-Strasse 2, 07743 Jena, Germany
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31
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Tard C, Pickett CJ. Structural and functional analogues of the active sites of the [Fe]-, [NiFe]-, and [FeFe]-hydrogenases. Chem Rev 2009; 109:2245-74. [PMID: 19438209 DOI: 10.1021/cr800542q] [Citation(s) in RCA: 1016] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cédric Tard
- Laboratoire d'Electrochimie Moléculaire, Unité Mixte de Recherche Université-CNRS 7591, Université Paris Diderot, 75013 Paris, France
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32
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Zampella G, Fantucci P, Gioia LD. Unveiling How Stereoelectronic Factors Affect Kinetics and Thermodynamics of Protonation Regiochemistry in [FeFe] Hydrogenase Synthetic Models: A DFT Investigation. J Am Chem Soc 2009; 131:10909-17. [DOI: 10.1021/ja902727z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Giuseppe Zampella
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza, 2 20126-Milan, Italy
| | - Piercarlo Fantucci
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza, 2 20126-Milan, Italy
| | - Luca De Gioia
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza, 2 20126-Milan, Italy
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33
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Stiebritz MT, Reiher M. Theoretical Study of Dioxygen Induced Inhibition of [FeFe]-Hydrogenase. Inorg Chem 2009; 48:7127-40. [DOI: 10.1021/ic9002127] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin T. Stiebritz
- Laboratorium für Physikalische Chemie, ETH Zurich, Wolfgang-Pauli-Strasse 10 8093 Zürich, Switzerland
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zurich, Wolfgang-Pauli-Strasse 10 8093 Zürich, Switzerland
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34
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Capon JF, Gloaguen F, Pétillon FY, Schollhammer P, Talarmin J. Electron and proton transfers at diiron dithiolate sites relevant to the catalysis of proton reduction by the [FeFe]-hydrogenases. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2008.10.020] [Citation(s) in RCA: 279] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Bertini L, Greco C, De Gioia L, Fantucci P. DFT/TDDFT Exploration of the Potential Energy Surfaces of the Ground State and Excited States of Fe2(S2C3H6)(CO)6: A Simple Functional Model of the [FeFe] Hydrogenase Active Site. J Phys Chem A 2009; 113:5657-70. [DOI: 10.1021/jp809347h] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luca Bertini
- Department of Biotechnology and Biosciences, Universitá degli Studi di Milano—Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Claudio Greco
- Department of Biotechnology and Biosciences, Universitá degli Studi di Milano—Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Luca De Gioia
- Department of Biotechnology and Biosciences, Universitá degli Studi di Milano—Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Piercarlo Fantucci
- Department of Biotechnology and Biosciences, Universitá degli Studi di Milano—Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
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36
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Synthesis, characterisation of two hexa-iron clusters with {Fe2S2(CO)x} (x=5 or 6) fragments and investigation into their inter-conversion. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.09.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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37
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Justice AK, De Gioia L, Nilges MJ, Rauchfuss TB, Wilson SR, Zampella G. Redox and structural properties of mixed-valence models for the active site of the [FeFe]-hydrogenase: progress and challenges. Inorg Chem 2008; 47:7405-14. [PMID: 18620387 PMCID: PMC2562777 DOI: 10.1021/ic8007552] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The one-electron oxidations of a series of diiron(I) dithiolato carbonyls were examined to evaluate the factors that affect the oxidation state assignments, structures, and reactivity of these low-molecular weight models for the H ox state of the [FeFe]-hydrogenases. The propanedithiolates Fe 2(S 2C 3H 6)(CO) 3(L)(dppv) (L = CO, PMe 3, P i-Pr 3) oxidize at potentials approximately 180 mV milder than the related ethanedithiolates ( Angew. Chem., Int. Ed. 2007, 46, 6152). The steric clash between the central methylene of the propanedithiolate and the phosphine favors the rotated structure, which forms upon oxidation. Electron Paramagnetic Resonance (EPR) spectra for the mixed-valence cations indicate that the unpaired electron is localized on the Fe(CO)(dppv) center in both [Fe 2(S 2C 3H 6)(CO) 4(dppv)]BF 4 and [Fe 2(S 2C 3H 6)(CO) 3(PMe 3)(dppv)]BF 4, as seen previously for the ethanedithiolate [Fe 2(S 2C 2H 4)(CO) 3(PMe 3)(dppv)]BF 4. For [Fe 2(S 2C n H 2 n )(CO) 3(P i-Pr 3)(dppv)]BF 4; however, the spin is localized on the Fe(CO) 2(P i-Pr 3) center, although the Fe(CO)(dppv) site is rotated in the crystalline state. IR and EPR spectra, as well as redox potentials and density-functional theory (DFT) calculations, suggest that the Fe(CO) 2(P i-Pr 3) site is rotated in solution, driven by steric factors. Analysis of the DFT-computed partial atomic charges for the mixed-valence species shows that the Fe atom featuring a vacant apical coordination position is an electrophilic Fe(I) center. One-electron oxidation of [Fe 2(S 2C 2H 4)(CN)(CO) 3(dppv)] (-) resulted in 2e oxidation of 0.5 equiv to give the mu-cyano derivative [Fe (I) 2(S 2C 2H 4)(CO) 3(dppv)](mu-CN)[Fe (II) 2(S 2C 2H 4)(mu-CO)(CO) 2(CN)(dppv)], which was characterized spectroscopically.
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Affiliation(s)
- Aaron K. Justice
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, Department of Biotechnology and Biosciences, University of Milano—Bicocca, Piazza della Scienza 1, 20126-Milan, Italy,
| | - Luca De Gioia
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, Department of Biotechnology and Biosciences, University of Milano—Bicocca, Piazza della Scienza 1, 20126-Milan, Italy,
| | - Mark J. Nilges
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, Department of Biotechnology and Biosciences, University of Milano—Bicocca, Piazza della Scienza 1, 20126-Milan, Italy,
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, Department of Biotechnology and Biosciences, University of Milano—Bicocca, Piazza della Scienza 1, 20126-Milan, Italy,
| | - Scott R. Wilson
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, Department of Biotechnology and Biosciences, University of Milano—Bicocca, Piazza della Scienza 1, 20126-Milan, Italy,
| | - Giuseppe Zampella
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, Department of Biotechnology and Biosciences, University of Milano—Bicocca, Piazza della Scienza 1, 20126-Milan, Italy,
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Thomas CM, Liu T, Hall MB, Darensbourg MY. Series of Mixed Valent Fe(II)Fe(I) Complexes That Model the Hox State of [FeFe]Hydrogenase: Redox Properties, Density-Functional Theory Investigation, and Reactivities with Extrinsic CO. Inorg Chem 2008; 47:7009-24. [DOI: 10.1021/ic800654a] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Tianbiao Liu
- Department of Chemistry, Texas A&M University, College Station, Texas 77845
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas 77845
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Cracknell JA, Vincent KA, Armstrong FA. Enzymes as Working or Inspirational Electrocatalysts for Fuel Cells and Electrolysis. Chem Rev 2008; 108:2439-61. [DOI: 10.1021/cr0680639] [Citation(s) in RCA: 846] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Justice AK, Nilges MJ, Rauchfuss TB, Wilson SR, De Gioia L, Zampella G. Diiron dithiolato carbonyls related to the H(ox)CO state of [FeFe]-hydrogenase. J Am Chem Soc 2008; 130:5293-301. [PMID: 18341276 PMCID: PMC2435217 DOI: 10.1021/ja7113008] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Oxidation of the electron-rich (E(1/2) = -175 vs Ag/AgCl) ethanedithiolato complex Fe2(S2C2H4)(CO)2(dppv)2 (1) under a CO atmosphere yielded [Fe2(S2C2H4)(mu-CO)(CO)2(dppv)2](+) ([1(CO)](+)), a model for the H(ox)(CO) state of the [FeFe]-hydrogenases. This complex exists as two isomers: a kinetically favored unsymmetrical derivative, unsym-[1(CO)](+), and a thermodynamically favored isomer, sym-[1(CO)](+), wherein both diphosphines span apical and basal sites. Crystallographic characterization of sym-[1(CO)](+) confirmed a C2-symmetric structure with a bridging CO ligand and an elongated Fe-Fe bond of 2.7012(14) A, as predicted previously. Oxidation of sym-[1(CO)](+) and unsym-[1(CO)](+) again by 1e(-) oxidation afforded the respective diamagnetic diferrous derivatives where the relative stabilities of the sym and unsym isomers are reversed. DFT calculations indicate that the stabilities of sym and unsym isomers are affected differently by the oxidation state of the diiron unit: the mutually trans CO ligands in the sym isomer are more destabilizing in the mixed-valence state than in the diferrous state. EPR analysis of mixed-valence complexes revealed that, for [1](+), the unpaired spin is localized on a single iron center, whereas for unsym/sym-[1(CO)](+), the unpaired spin was delocalized over both iron centers, as indicated by the magnitude of the hyperfine coupling to the phosphine ligands trans to the Fe-Fe vector. Oxidation of 1 by 2 equiv of acetylferrocenium afforded the dication [1](2+), which, on the basis of low-temperature IR spectrum, is structurally similar to [1](+). Treatment of [1](2+) with CO gives unsym-[1(CO)](2+).
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Affiliation(s)
- Aaron K Justice
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Thomas CM, Liu T, Hall MB, Darensbourg MY. Regioselective 12CO/13CO exchange activity of a mixed-valent Fe(ii)Fe(i) model of the Hox state of [FeFe]-hydrogenase. Chem Commun (Camb) 2008:1563-5. [DOI: 10.1039/b719559a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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