1
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Zhang X, Jiang X, Zhao Q, Li Y, Feng L, Ye S, Tung CH, Wang W. Synthesis and Characterization of Bridging-Diazene Diiron Half-Sandwich Complexes: The Role of Sulfur Hydrogen Bonding. Inorg Chem 2024; 63:14040-14049. [PMID: 39007501 DOI: 10.1021/acs.inorgchem.4c01783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
We report two bridging-diazene diiron complexes [Cp*Fe(8-quinolinethiolate)]2(μ-N2H2) (1-N2H2) and [Cp*Fe(1,2-Cy2PC6H4S)]2(μ-N2H2) (2-N2H2), synthesized by the reaction of hydrazine with the corresponding thiolate-based iron half-sandwich complex, [Cp*Fe(8-quinolinethiolate)]2 (1) and Cp*Fe(1,2-Cy2PC6H4S) (2). Crystallographic analysis reveals that the thiolate sites in 1-N2H2 and 2-N2H2 can engage in N-H···S hydrogen bonding with the diazene protons. 1-N2H2 is thermally stable in both solid and solution states, allowing for one-electron oxidation to afford a cationic diazene radical complex [1-N2H2]+ at room temperature. In contrast, 2-N2H2 tends to undergo N2H2/N2 transformation, leading to the formation of a Fe(III)-H species by the loss of N2. In addition to stabilizing HN=NH species through the hydrogen bonding, the thiolate-based ligands also seem to facilitate proton-coupled electron transfer, thereby promoting N-H cleavage.
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Affiliation(s)
- Xin Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Xuebin Jiang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiuting Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yongxian Li
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Lei Feng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Shengfa Ye
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Wenguang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- College of Chemistry, Beijing Normal University, Beijing 100875, China
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2
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Konsewicz K, Laczkó G, Pápai I, Zhivonitko VV. Activation of H 2 using ansa-aminoboranes: solvent effects, dynamics, and spin hyperpolarization. Phys Chem Chem Phys 2024; 26:3197-3207. [PMID: 38193236 DOI: 10.1039/d3cp05816f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Spin hyperpolarization generated upon activation of parahydrogen, the spin-0 isomer of H2, by ansa-aminoboranes (AABs) constitutes a rare but interesting example of applied metal-free catalysis in parahydrogen-induced polarization (PHIP). AAB molecular moieties made of light elements would be useful in important areas of NMR, such as chemosensing and the production of hyperpolarized substances, or generally in NMR sensitivity enhancement. At the same time, little is known about the detailed mechanistic aspects of underlying chemical processes. Herein, we present a joint experimental-computational study of the kinetic and thermodynamic aspects of H2 activation by AABs, for the first time providing molecular-level details and results of PHIP experiments with AABs in various solvents. Specifically, a large number of kinetic and thermodynamic parameters are measured experimentally for H2 activation by 2-aminophenylboranes of variable steric bulkiness of the boryl site. A clear correlation between the experimental and DFT-predicted thermochemical parameters is observed. PHIP effects in toluene, dichloromethane, and acetonitrile are characterized and rationalized based on the use of the kinetic and nuclear spin relaxation parameters. Altogether, the obtained results provide valuable information for the further rational design of efficient AAB catalysts for metal-free PHIP based on frustrated Lewis pair (FLP) chemistry.
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Affiliation(s)
- Karolina Konsewicz
- NMR Research Unit, Faculty of Science, University of Oulu, P.O. Box 3000, Oulu, 90014, Finland.
| | - Gergely Laczkó
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Imre Pápai
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, Hungary
| | - Vladimir V Zhivonitko
- NMR Research Unit, Faculty of Science, University of Oulu, P.O. Box 3000, Oulu, 90014, Finland.
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3
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Air-stable nickel(II) borohydrides as prohydrides: Reactions with halocarbons and aerial carbon dioxide. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Lü S, Qin CR, Ma HL, Ouyang JM, Li QL. Tertiary phosphine disubstituted diiron bis(monothiolate) carbonyls related to the active site of [FeFe]-H2ases: Preparation, protonation and electrochemical properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Abstract
The role of deuterium in disentangling key steps of the mechanisms of H2 activation by mimics of hydrogenases is presented. These studies have allowed to a better understanding of the mode of action of the natural enzymes and their mimics.
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Affiliation(s)
- Mar Gómez-Gallego
- Departamento de Química Orgánica I and Center for Innovation in Advanced Chemistry (ORFEO-CINQA). Facultad de Química
- Universidad Complutense
- 28040-Madrid
- Spain
| | - Miguel A. Sierra
- Departamento de Química Orgánica I and Center for Innovation in Advanced Chemistry (ORFEO-CINQA). Facultad de Química
- Universidad Complutense
- 28040-Madrid
- Spain
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6
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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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7
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Lü S, Gong S, Qin CR, Li QL. PNP bridged diiron carbonyls containing Fe/E (E = S and Se) cluster core related to the active site of [FeFe]-H2ases. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121581] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Yan L, Wang LH, Li X, Li A, Xiao QM, Liu XF, Li YL, Liu XH, Jiang ZQ. 2-(Diphenylphosphino)benzoate-functionalized diiron ethane-1,2-dithiolate complexes with uncoordinated or coordinated phosphine ligand. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1756291] [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)
- 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
| | - Xie Li
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Ao Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Qi-Min Xiao
- 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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9
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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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10
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Shimamura T, Maeno Y, Kubo K, Kume S, Greco C, Mizuta T. Protonation and electrochemical properties of a bisphosphide diiron hexacarbonyl complex bearing amino groups on the phosphide bridge. Dalton Trans 2019; 48:16595-16603. [PMID: 31651000 DOI: 10.1039/c9dt03427g] [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
A bisphosphide-bridged diiron hexacarbonyl complex 3 with NEt2 groups on the phosphide bridge was synthesized to examine a new proton relay system from the NEt2 group to the bridging hydride between the two iron centers. As a precursor of the bridging moiety, peri-Et2NP-PNEt2-bridged naphthylene 5 was synthesized by the reaction of 1,8-dilithionaphthylene with two equivalents of Cl2PNEt2 followed by reductive P-P bond formation by magnesium. The reaction of the diphosphine ligand 5 with Fe2(CO)9 gave the diiron hexacarbonyl complex 3, in which the P-P bond of the ligand was cleaved to form the bisphosphide-bridge. The molecular structure of 3 indicated that the trigonal plane of the NEt2 group was forced to face the Fe-Fe bond to avoid steric congestion with the naphthylene group linking the two phosphide groups. The NEt2 group could be protonated by p-toluenesulfonic acid. Density functional theory (DFT) calculations confirmed that the proton of the N(H)Et2 group adopted a position close to the bridging hydride. The DFT results for the ferrocene analogue 1, in which the 1,8-naphthylene group of 3 was replaced with the 1,1'-ferrocenylene group, also revealed that the most stable orientation of the protonated NHEt2 group was that in the protonated 3. As a result, electrochemical proton reduction reactions using complexes 1 and 3 proceeded with similar catalytic efficiencies. Unfortunately, the catalytic efficiencies (CEs) of these complexes were much lower than those of the complexes with a proton relay system of the terminal hydrogen, indicating that the reactive properties of the bridging hydride in the present proton relay system cannot exceed those of the terminal hydride.
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Affiliation(s)
- Takehiko Shimamura
- Department of Chemistry, Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-hiroshima 739-8526, Japan.
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11
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Yan L, Hu MY, Mu C, Li A, Liu XF, Zhao PH, Li YL, Jiang ZQ, Wu HK. Synthesis, characterization, and electrochemistry of five diiron propane-1,3-dithiolate complexes with substituted phosphine ligands. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1672048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Lin Yan
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
| | - Meng-Yuan Hu
- School of Materials Science and Engineering, North University of China, Taiyuan, China
| | - Chao Mu
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Ao 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
| | - Pei-Hua Zhao
- School of Materials Science and Engineering, North University of China, Taiyuan, China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, China
| | - Zhong-Qing Jiang
- Department of Physics, Key Laboratory of ATMMT Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, China
| | - Hong-Ke Wu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
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12
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Borthakur B, Phukan AK. Can carbene decorated [FeFe]-hydrogenase model complexes catalytically produce dihydrogen? An insight from theory. Dalton Trans 2019; 48:11298-11307. [PMID: 31270518 DOI: 10.1039/c9dt01855g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic alkyl amino carbene (CAAC) anchored [FeFe]-hydrogenase model complex featuring rotated conformation at one of the iron centers are found to be promising candidate for effective production of dihydrogen. A stepwise comparison of the complete mechanism using the CAAC stabilized model complex [1]0 has been performed with that of an experimentally isolated one ([2]0). Interestingly, the reduction events involved in the catalytic cycles are found to be more favorable than those previously reported for a similar experimentally known system. Furthermore, the computed ΔpKa values indicate that the distal iron center with a vacant coordination site is more basic compared to the amino nitrogen atom of the azadithiolate bridge. We also made an attempt to determine the oxidation states of the iron centers for the intermediates involved in the catalytic cycles on the basis of the computed Mössbauer isomer shift and Mulliken spin density values.
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Affiliation(s)
- Bitupon Borthakur
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
| | - Ashwini K Phukan
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
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13
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Borthakur B, Vargas A, Phukan AK. A Computational Study of Carbene Ligand Stabilization of Biomimetic Models of the Rotated H
red
State of [FeFe]‐Hydrogenase. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900237] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Bitupon Borthakur
- Department of Chemical Sciences Tezpur University Napaam 784028 Assam India
| | - Alfredo Vargas
- Department of Chemistry, School of Life Sciences University of Sussex Brighton BN1 9QJ Sussex United Kingdom
| | - Ashwini K. Phukan
- Department of Chemical Sciences Tezpur University Napaam 784028 Assam India
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14
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Unwin DG, Ghosh S, Ridley F, Richmond MG, Holt KB, Hogarth G. Models of the iron-only hydrogenase enzyme: structure, electrochemistry and catalytic activity of Fe2(CO)3(μ-dithiolate)(μ,κ1,κ2-triphos). Dalton Trans 2019; 48:6174-6190. [DOI: 10.1039/c9dt00700h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of Fe2(triphos)(CO)3(μ-dithiolate) complexes have been prepared and studied as models of the diiron centre in [FeFe]-hydrogenases.
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Affiliation(s)
- David G. Unwin
- Department of Chemistry
- University College London
- London
- UK
| | - Shishir Ghosh
- Department of Chemistry
- University College London
- London
- UK
- Department of Chemistry
| | - Faith Ridley
- Department of Chemistry
- University College London
- London
- UK
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15
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Yu X, Pang M, Zhang S, Hu X, Tung CH, Wang W. Terminal Thiolate-Dominated H/D Exchanges and H2 Release: Diiron Thiol–Hydride. J Am Chem Soc 2018; 140:11454-11463. [DOI: 10.1021/jacs.8b06996] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xin Yu
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan, 250100, P. R. China
| | - Maofu Pang
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan, 250100, P. R. China
| | - Shengnan Zhang
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan, 250100, P. R. China
| | - Xinlong Hu
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan, 250100, P. R. China
| | - Chen-Ho Tung
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan, 250100, P. R. China
| | - Wenguang Wang
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan, 250100, P. R. China
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16
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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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17
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Rumpel S, Sommer C, Reijerse E, Farès C, Lubitz W. Direct Detection of the Terminal Hydride Intermediate in [FeFe] Hydrogenase by NMR Spectroscopy. J Am Chem Soc 2018. [PMID: 29521088 DOI: 10.1021/jacs.8b00459] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydride state intermediates are known to occur in various hydrogen conversion enzymes, including the highly efficient [FeFe] hydrogenases. The intermediate state involving a terminal iron-bound hydride has been recognized as crucial for the catalytic mechanism, but its occurrence has up to now eluded unequivocal proof under (near) physiological conditions. Here we show that the terminal hydride in the [FeFe] hydrogenase from Chlamydomonas reinhardtii can be directly detected using solution 1H NMR spectroscopy at room temperature, opening new avenues for detailed in situ investigations under catalytic conditions.
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Affiliation(s)
- Sigrun Rumpel
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany
| | - Constanze Sommer
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany
| | - Edward Reijerse
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany
| | - Christophe Farès
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm Platz 1 , 45470 Mülheim an der Ruhr , Germany
| | - Wolfgang Lubitz
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany
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18
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Carlson MR, Gray DL, Richers CP, Wang W, Zhao PH, Rauchfuss TB, Pelmenschikov V, Pham CC, Gee LB, Wang H, Cramer SP. Sterically Stabilized Terminal Hydride of a Diiron Dithiolate. Inorg Chem 2018; 57:1988-2001. [PMID: 29384371 DOI: 10.1021/acs.inorgchem.7b02903] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The kinetically robust hydride [t-HFe2(Me2pdt)(CO)2(dppv)2]+ ([t-H1]+) (Me2pdt2- = Me2C(CH2S-)2; dppv = cis-1,2-C2H2(PPh2)2) and related derivatives were prepared with 57Fe enrichment for characterization by NMR, FT-IR, and NRVS. The experimental results were rationalized using DFT molecular modeling and spectral simulations. The spectroscopic analysis was aimed at supporting assignments of Fe-H vibrational spectra as they relate to recent measurements on [FeFe]-hydrogenase enzymes. The combination of bulky Me2pdt2- and dppv ligands stabilizes the terminal hydride with respect to its isomerization to the 5-16 kcal/mol more stable bridging hydride ([μ-H1]+) with t1/2(313.3 K) = 19.3 min. In agreement with the nOe experiments, the calculations predict that one methyl group in [t-H1]+ interacts with the hydride with a computed CH···HFe distance of 1.7 Å. Although [t-H571]+ exhibits multiple NRVS features in the 720-800 cm-1 region containing the bending Fe-H modes, the deuterated [t-D571]+ sample exhibits a unique Fe-D/CO band at ∼600 cm-1. In contrast, the NRVS spectra for [μ-H571]+ exhibit weaker bands near 670-700 cm-1 produced by the Fe-H-Fe wagging modes coupled to Me2pdt2- and dppv motions.
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Affiliation(s)
- Michaela R Carlson
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Danielle L Gray
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Casseday P Richers
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Wenguang Wang
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Pei-Hua Zhao
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | - Thomas B Rauchfuss
- School of Chemical Sciences, University of Illinois , Urbana, Illinois 61801, United States
| | | | - Cindy C Pham
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Leland B Gee
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Hongxin Wang
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Stephen P Cramer
- Department of Chemistry, University of California , Davis, California 95616, United States
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19
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Fukuzumi S, Lee YM, Nam W. Thermal and photocatalytic production of hydrogen with earth-abundant metal complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.07.014] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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20
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Liu XF. Reaction of the diiron toluenedithiolate hexacarbonyl complex with 1,1-bis(diphenylphosphino)methane. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1413553] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xu-Feng Liu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, China
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21
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Interplay of hemilability and redox activity in models of hydrogenase active sites. Proc Natl Acad Sci U S A 2017; 114:E9775-E9782. [PMID: 29087322 DOI: 10.1073/pnas.1710475114] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The hydrogen evolution reaction, as catalyzed by two electrocatalysts [M(N2S2)·Fe(NO)2]+, [Fe-Fe]+ (M = Fe(NO)) and [Ni-Fe]+ (M = Ni) was investigated by computational chemistry. As nominal models of hydrogenase active sites, these bimetallics feature two kinds of actor ligands: Hemilabile, MN2S2 ligands and redox-active, nitrosyl ligands, whose interplay guides the H2 production mechanism. The requisite base and metal open site are masked in the resting state but revealed within the catalytic cycle by cleavage of the MS-Fe(NO)2 bond from the hemilabile metallodithiolate ligand. Introducing two electrons and two protons to [Ni-Fe]+ produces H2 from coupling a hydride temporarily stored on Fe(NO)2 (Lewis acid) and a proton accommodated on the exposed sulfur of the MN2S2 thiolate (Lewis base). This Lewis acid-base pair is initiated and preserved by disrupting the dative donation through protonation on the thiolate or reduction on the thiolate-bound metal. Either manipulation modulates the electron density of the pair to prevent it from reestablishing the dative bond. The electron-buffering nitrosyl's role is subtler as a bifunctional electron reservoir. With more nitrosyls as in [Fe-Fe]+, accumulated electronic space in the nitrosyls' π*-orbitals makes reductions easier, but redirects the protonation and reduction to sites that postpone the actuation of the hemilability. Additionally, two electrons donated from two nitrosyl-buffered irons, along with two external electrons, reduce two protons into two hydrides, from which reductive elimination generates H2.
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22
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Algarra AG. Computational Insights on the Mechanism of H2 Activation at Ir2S2(PPh3)4: A Combination of Multiple Reaction Pathways Involving Facile H Migration Processes. Inorg Chem 2016; 56:186-196. [DOI: 10.1021/acs.inorgchem.6b01888] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Andrés G. Algarra
- Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica,
Facultad de Ciencias, Universidad de Cádiz, Apartado 40, Puerto Real, 11510 Cádiz, Spain
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23
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Liu XF. Synthesis and structures of diiron dithiolate complexes with 1,2-bis(diphenylphosphino)acetylene or tris(2-methoxyphenyl)phosphine. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Schilter D, Camara JM, Huynh MT, Hammes-Schiffer S, Rauchfuss TB. Hydrogenase Enzymes and Their Synthetic Models: The Role of Metal Hydrides. Chem Rev 2016; 116:8693-749. [PMID: 27353631 PMCID: PMC5026416 DOI: 10.1021/acs.chemrev.6b00180] [Citation(s) in RCA: 397] [Impact Index Per Article: 49.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogenase enzymes efficiently process H2 and protons at organometallic FeFe, NiFe, or Fe active sites. Synthetic modeling of the many H2ase states has provided insight into H2ase structure and mechanism, as well as afforded catalysts for the H2 energy vector. Particularly important are hydride-bearing states, with synthetic hydride analogues now known for each hydrogenase class. These hydrides are typically prepared by protonation of low-valent cores. Examples of FeFe and NiFe hydrides derived from H2 have also been prepared. Such chemistry is more developed than mimicry of the redox-inactive monoFe enzyme, although functional models of the latter are now emerging. Advances in physical and theoretical characterization of H2ase enzymes and synthetic models have proven key to the study of hydrides in particular, and will guide modeling efforts toward more robust and active species optimized for practical applications.
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Affiliation(s)
- David Schilter
- Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - James M. Camara
- Department of Chemistry, Yeshiva University, 500 West 185th Street, New York, New York 10033, United States
| | - Mioy T. Huynh
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Sharon Hammes-Schiffer
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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25
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Abstract
Virtually all organosulfur compounds react with Fe(0) carbonyls to give the title complexes. These reactions are reviewed in light of major advances over the past few decades, spurred by interest in Fe2(μ-SR)2(CO)x centers at the active sites of the [FeFe]-hydrogenase enzymes. The most useful synthetic route to Fe2(μ-SR)2(CO)6 involves the reaction of thiols with Fe2(CO)9 and Fe3(CO)12. Such reactions can proceed via mono-, di-, and triiron intermediates. The reactivity of Fe(0) carbonyls toward thiols is highly chemoselective, and the resulting dithiolato complexes are fairly rugged. Thus, many complexes tolerate further synthetic elaboration directed at the organic substituents. A second major route involves alkylation of Fe2(μ-S2)(CO)6, Fe2(μ-SH)2(CO)6, and Li2Fe2(μ-S)2(CO)6. This approach is especially useful for azadithiolates Fe2[(μ-SCH2)2NR](CO)6. Elaborate complexes arise via addition of the FeSH group to electrophilic alkenes, alkynes, and carbonyls. Although the first example of Fe2(μ-SR)2(CO)6 was prepared from ferrous reagents, ferrous compounds are infrequently used, although the Fe(II)(SR)2 + Fe(0) condensation reaction is promising. Almost invariably low-yielding, the reaction of Fe3(CO)12, S8, and a variety of unsaturated substrates results in C-H activation, affording otherwise inaccessible derivatives. Thiones and related C═S-containing reagents are highly reactive toward Fe(0), often giving complexes derived from substituted methanedithiolates and C-H activation.
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Affiliation(s)
- Yulong Li
- School of Chemistry and Pharmaceutical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
- School of Chemical Sciences, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
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26
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Synthetic and structural studies of tolyl-dithiolate diiron carbonyl complexes with tris(aryl)phosphine co-ligands. TRANSIT METAL CHEM 2016. [DOI: 10.1007/s11243-016-0051-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Zhang F, Jia J, Dong S, Wang W, Tung CH. Hydride Transfer from Iron(II) Hydride Compounds to NAD(P)+ Analogues. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00179] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Fanjun Zhang
- Key Laboratory of Colloid and
Interface Chemistry, Ministry of Education, School of Chemistry and
Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, People’s Republic of China
| | - Jiong Jia
- Key Laboratory of Colloid and
Interface Chemistry, Ministry of Education, School of Chemistry and
Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, People’s Republic of China
| | - Shuli Dong
- Key Laboratory of Colloid and
Interface Chemistry, Ministry of Education, School of Chemistry and
Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, People’s Republic of China
| | - Wenguang Wang
- Key Laboratory of Colloid and
Interface Chemistry, Ministry of Education, School of Chemistry and
Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, People’s Republic of China
| | - Chen-Ho Tung
- Key Laboratory of Colloid and
Interface Chemistry, Ministry of Education, School of Chemistry and
Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, People’s Republic of China
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28
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Zhou X, Barton BE, Chambers GM, Rauchfuss TB, Arrigoni F, Zampella G. Preparation and Protonation of Fe2(pdt)(CNR)6, Electron-Rich Analogues of Fe2(pdt)(CO)6. Inorg Chem 2016; 55:3401-12. [PMID: 26999632 DOI: 10.1021/acs.inorgchem.5b02789] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complexes Fe2(pdt)(CNR)6 (pdt(2-) = CH2(CH2S(-))2) were prepared by thermal substitution of the hexacarbonyl complex with the isocyanides RNC for R = C6H4-4-OMe (1), C6H4-4-Cl (2), Me (3). These complexes represent electron-rich analogues of the parent Fe2(pdt)(CO)6. Unlike most substituted derivatives of Fe2(pdt)(CO)6, these isocyanide complexes are sterically unencumbered and have the same idealized symmetry as the parent hexacarbonyl derivatives. Like the hexacarbonyls, the stereodynamics of 1-3 involve both turnstile rotation of the Fe(CNR)3 as well as the inversion of the chair conformation of the pdt ligand. Structural studies indicate that the basal isocyanide has nonlinear CNC bonds and short Fe-C distances, indicating that they engage in stronger Fe-C π-backbonding than the apical ligands. Cyclic voltammetry reveals that these new complexes are far more reducing than the hexacarbonyls, although the redox behavior is complex. Estimated reduction potentials are E1/2 ≈ -0.6 ([2](+/0)), -0.7 ([1](+/0)), and -1.25 ([3](+/0)). According to DFT calculations, the rotated isomer of 3 is only 2.2 kcal/mol higher in energy than the crystallographically observed unrotated structure. The effects of rotated versus unrotated structure and of solvent coordination (THF, MeCN) on redox potentials were assessed computationally. These factors shift the redox couple by as much as 0.25 V, usually less. Compounds 1 and 2 protonate with strong acids to give the expected μ-hydrides [H1](+) and [H2](+). In contrast, 3 protonates with [HNEt3]BAr(F)4 (pKa(MeCN) = 18.7) to give the aminocarbyne [Fe2(pdt)(CNMe)5(μ-CN(H)Me)](+) ([3H](+)). According to NMR measurements and DFT calculations, this species adopts an unsymmetrical, rotated structure. DFT calculations further indicate that the previously described carbyne complex [Fe2(SMe)2(CO)3(PMe3)2(CCF3)](+) also adopts a rotated structure with a bridging carbyne ligand. Complex [3H](+) reversibly adds MeNC to give [Fe2(pdt)(CNR)6(μ-CN(H)Me)](+) ([3H(CNMe)](+)). Near room temperature, [3H](+) isomerizes to the hydride [(μ-H)Fe2(pdt)(CNMe)6](+) ([H3](+)) via a first-order pathway.
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Affiliation(s)
- Xiaoyuan Zhou
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Goodwin Avenue, Urbana, Illinois 61801, United States
| | - Bryan E Barton
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Goodwin Avenue, Urbana, Illinois 61801, United States
| | - Geoffrey M Chambers
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Goodwin Avenue, Urbana, Illinois 61801, United States
| | - Thomas B Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Goodwin Avenue, Urbana, Illinois 61801, United States
| | - 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
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29
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Liu YC, Chu KT, Huang YL, Hsu CH, Lee GH, Tseng MC, Chiang MH. Protonation/Reduction of Carbonyl-Rich Diiron Complexes and the Direct Observation of Triprotonated Species: Insights into the Electrocatalytic Mechanism of Hydrogen Formation. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02646] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu-Chiao Liu
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Kai-Ti Chu
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
- Molecular
Science and Technology Program, TIGP, Institute of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
- Department
of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Yi-Lan Huang
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Cheng-Huey Hsu
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Gene-Hsiang Lee
- Instrumentation
Center, National Taiwan University, Taipei 106, Taiwan
| | - Mei-Chun Tseng
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
| | - Ming-Hsi Chiang
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
- Molecular
Science and Technology Program, TIGP, Institute of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan
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30
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Zhivonitko VV, Sorochkina K, Chernichenko K, Kótai B, Földes T, Pápai I, Telkki VV, Repo T, Koptyug I. Nuclear spin hyperpolarization with ansa-aminoboranes: a metal-free perspective for parahydrogen-induced polarization. Phys Chem Chem Phys 2016; 18:27784-27795. [DOI: 10.1039/c6cp05211h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of new ansa-aminoboranes was analyzed experimentally and theoretically for metal-free production of parahydrogen-induced polarization.
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Affiliation(s)
- Vladimir V. Zhivonitko
- Laboratory of Magnetic Resonance Microimaging
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Department of Natural Sciences
| | | | | | - Bianka Kótai
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- H-1117 Budapest
- Hungary
| | - Tamás Földes
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- H-1117 Budapest
- Hungary
| | - Imre Pápai
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- H-1117 Budapest
- Hungary
| | | | - Timo Repo
- Department of Chemistry
- University of Helsinki
- 00014 Helsinki
- Finland
| | - Igor Koptyug
- Laboratory of Magnetic Resonance Microimaging
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Department of Natural Sciences
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31
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Hunt NT, Wright JA, Pickett C. Detection of Transient Intermediates Generated from Subsite Analogues of [FeFe] Hydrogenases. Inorg Chem 2015; 55:399-410. [DOI: 10.1021/acs.inorgchem.5b02477] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Neil T. Hunt
- Department of Physics, University of Strathclyde, SUPA, Glasgow G4 0NG, United Kingdom
| | - Joseph A. Wright
- Energy Materials Laboratory, School of
Chemistry, University of East Anglia (UEA), Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Christopher Pickett
- Energy Materials Laboratory, School of
Chemistry, University of East Anglia (UEA), Norwich Research Park, Norwich NR4 7TJ, United Kingdom
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32
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Yang D, Li Y, Wang B, Zhao X, Su L, Chen S, Tong P, Luo Y, Qu J. Synthesis and Electrocatalytic Property of Diiron Hydride Complexes Derived from a Thiolate-Bridged Diiron Complex. Inorg Chem 2015; 54:10243-9. [DOI: 10.1021/acs.inorgchem.5b01508] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dawei Yang
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Yang Li
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Xiangyu Zhao
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Linan Su
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Si Chen
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Peng Tong
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals,
School of Pharmaceutical Science and Technology, Faculty of Chemical,
Environmental and Biological Science and Technology, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China
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33
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Filippi G, Arrigoni F, Bertini L, De Gioia L, Zampella G. DFT Dissection of the Reduction Step in H2 Catalytic Production by [FeFe]-Hydrogenase-Inspired Models: Can the Bridging Hydride Become More Reactive Than the Terminal Isomer? Inorg Chem 2015; 54:9529-42. [DOI: 10.1021/acs.inorgchem.5b01495] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giulia Filippi
- Department of Biotechnologies
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Federica Arrigoni
- Department of Biotechnologies
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Luca Bertini
- Department of Biotechnologies
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Luca De Gioia
- Department of Biotechnologies
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Giuseppe Zampella
- Department of Biotechnologies
and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
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34
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Li CG, Zhang GF, Zhu Y, Xue F, Shang JY, Cui MJ, Lou TJ. Synthesis of bridging hydrides of phenyl-functionalized diiron propanedithiolate complexes with 1,2-bis(diphenylphosphine)ethylene or 1,2-bis(diphenylphosphine)ethane ligands. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-9937-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Creutz SE, Peters JC. Diiron bridged-thiolate complexes that bind N2 at the Fe(II)Fe(II), Fe(II)Fe(I), and Fe(I)Fe(I) redox states. J Am Chem Soc 2015; 137:7310-3. [PMID: 26039253 PMCID: PMC4603983 DOI: 10.1021/jacs.5b04738] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
All known nitrogenase cofactors are rich in both sulfur and iron and are presumed capable of binding and reducing N2. Nonetheless, synthetic examples of transition metal model complexes that bind N2 and also feature sulfur donor ligands remain scarce. We report herein an unusual series of low-valent diiron complexes featuring thiolate and dinitrogen ligands. A new binucleating ligand scaffold is introduced that supports an Fe(μ-SAr)Fe diiron subunit that coordinates dinitrogen (N2-Fe(μ-SAr)Fe-N2) across at least three oxidation states (Fe(II)Fe(II), Fe(II)Fe(I), and Fe(I)Fe(I)). The (N2-Fe(μ-SAr)Fe-N2) system undergoes reduction of the bound N2 to produce NH3 (∼50% yield) and can efficiently catalyze the disproportionation of N2H4 to NH3 and N2. The present scaffold also supports dinitrogen binding concomitant with hydride as a co-ligand. Synthetic model complexes of these types are desirable to ultimately constrain hypotheses regarding Fe-mediated nitrogen fixation in synthetic and biological systems.
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Affiliation(s)
- Sidney E. Creutz
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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36
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Chernichenko K, Kótai B, Pápai I, Zhivonitko V, Nieger M, Leskelä M, Repo T. Intramolecular Frustrated Lewis Pair with the Smallest Boryl Site: Reversible H2Addition and Kinetic Analysis. Angew Chem Int Ed Engl 2014; 54:1749-53. [DOI: 10.1002/anie.201410141] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Indexed: 12/12/2022]
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37
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Chernichenko K, Kótai B, Pápai I, Zhivonitko V, Nieger M, Leskelä M, Repo T. Intramolecular Frustrated Lewis Pair with the Smallest Boryl Site: Reversible H2Addition and Kinetic Analysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410141] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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38
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Li CG, Xue F, Cui MJ, Shang JY, Lou TJ. 1,1′-bis(diphenylphosphino)ferrocene as an intramolecular or intermolecular bridging ligand related to the phenyl-functionalized diiron propanedithiolate complex: synthesis and catalysis of the reduction of protons. TRANSIT METAL CHEM 2014. [DOI: 10.1007/s11243-014-9888-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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39
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Jablonskytė A, Wright JA, Fairhurst SA, Webster LR, Pickett CJ. [FeFe] hydrogenase: protonation of {2Fe3S} systems and formation of super-reduced hydride states. Angew Chem Int Ed Engl 2014; 53:10143-6. [PMID: 25079249 PMCID: PMC4497599 DOI: 10.1002/anie.201406210] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Indexed: 11/29/2022]
Abstract
The synthesis and crystallographic characterization of a complex possessing a well-defined {2Fe3S(μ-H)} core gives access to a paramagnetic bridging hydride with retention of the core geometry. Chemistry of this 35-electron species within the confines of a thin-layer FTIR spectro-electrochemistry cell provides evidence for a unprecedented super-reduced Fe(I)(μ-H)Fe(I) intermediate.
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Affiliation(s)
- Aušra Jablonskytė
- Energy Materials Laboratory, School of Chemistry, University of East AngliaNorwich Research Park, Norwich NR4 7TJ (UK)
| | - Joseph A Wright
- Energy Materials Laboratory, School of Chemistry, University of East AngliaNorwich Research Park, Norwich NR4 7TJ (UK)
| | | | - Lee R Webster
- Energy Materials Laboratory, School of Chemistry, University of East AngliaNorwich Research Park, Norwich NR4 7TJ (UK)
| | - Christopher J Pickett
- Energy Materials Laboratory, School of Chemistry, University of East AngliaNorwich Research Park, Norwich NR4 7TJ (UK)
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40
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Jablonskytė A, Wright JA, Fairhurst SA, Webster LR, Pickett CJ. [FeFe] Hydrogenase: Protonation of {2Fe3S} Systems and Formation of Super-reduced Hydride States. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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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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Jablonskytė A, Webster LR, Simmons TR, Wright JA, Pickett CJ. Electronic Control of the Protonation Rates of Fe–Fe Bonds. J Am Chem Soc 2014; 136:13038-44. [DOI: 10.1021/ja506693m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Aušra Jablonskytė
- Energy Materials Laboratory,
School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
| | - Lee R. Webster
- Energy Materials Laboratory,
School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
| | - Trevor R. Simmons
- Energy Materials Laboratory,
School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
| | - Joseph A. Wright
- Energy Materials Laboratory,
School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
| | - Christopher J. Pickett
- Energy Materials Laboratory,
School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
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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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