1
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Fraker A, Linn BN, McSkimming A. Low-Coordinate Iron Hydride Chemistry at an N,N,C-Heteroscorpionate Platform. Inorg Chem 2024; 63:14449-14458. [PMID: 39037731 PMCID: PMC11304392 DOI: 10.1021/acs.inorgchem.4c01596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 06/21/2024] [Accepted: 06/30/2024] [Indexed: 07/23/2024]
Abstract
Locally high-spin iron hydrides are proposed to play a critical role as intermediates in iron-molybdenum cofactor (FeMoco)-catalyzed N2 fixation. Inspired by these biological systems, we report herein our initial investigations into low-coordinate iron hydride chemistry supported by our N,N,C-heteroscorpionate ligands. Those ligands with smaller steric profiles are unable to completely suppress the formation of a binuclear [Fe(μ2-H)]2 complex; however, the incorporation of more substantial steric bulk allows for the isolation of a rare example of a terminal, high-spin (S = 2) Fe2+ hydride. Fourier transform infrared spectroscopy suggests an unusually weak Fe-H bond in the latter molecule. Mössbauer spectroscopies, coupled with density functional theory calculations, highlights the substantial influence of the terminal hydride ligand on 57Fe isomer shift.
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Affiliation(s)
- Addison Fraker
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Brittany N. Linn
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
| | - Alex McSkimming
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
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2
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Drena A, Fraker A, Thompson NB, Doan PE, Hoffman BM, McSkimming A. Terminal Hydride Complex of High-Spin Mn. J Am Chem Soc 2024; 146:18370-18378. [PMID: 38940813 PMCID: PMC11240256 DOI: 10.1021/jacs.4c03310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 06/10/2024] [Accepted: 06/12/2024] [Indexed: 06/29/2024]
Abstract
The iron-molybdenum cofactor of nitrogenase (FeMoco) catalyzes fixation of N2 via Fe hydride intermediates. Our understanding of these species has relied heavily on the characterization of well-defined 3d metal hydride complexes, which serve as putative spectroscopic models. Although the Fe ions in FeMoco, a weak-field cluster, are expected to adopt locally high-spin Fe2+/3+ configurations, synthetically accessible hydride complexes featuring d5 or d6 electron counts are almost exclusively low-spin. We report herein the isolation of a terminal hydride complex of four-coordinate, high-spin (d5; S = 5/2) Mn2+. Electron paramagnetic resonance and electron-nuclear double resonance studies reveal an unusually large degree of spin density on the hydrido ligand. In light of the isoelectronic relationship between Mn2+ and Fe3+, our results are expected to inform our understanding of the valence electronic structures of reactive hydride intermediates derived from FeMoco.
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Affiliation(s)
- Alex Drena
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Addison Fraker
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Niklas B. Thompson
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Lemont, Illinois 60439, United States
| | - Peter E. Doan
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Brian M. Hoffman
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alex McSkimming
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
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3
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Yang W, Li X, Li SY, Li Q, Sun H, Li X. Synthesis of Bis(silylene) Iron Chlorides and Their Catalytic Activity for Dinitrogen Silylation. Inorg Chem 2023; 62:21014-21024. [PMID: 38095917 DOI: 10.1021/acs.inorgchem.3c02445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
In this study, three tetracoordinated bis(silylene) iron(II) chlorides, namely, [SiCHRSi]FeCl2 (1) (R = H), (2) (R = CH3), and (3) (R = Ph), were synthesized through the reactions of the three different bis(silylene) ligands [LSiCHRSiL] (L = PhC(NtBu)2, L1 (R = H), L2 (R = CH3), L3 (R = Ph)) with FeCl2·(THF)1.5 in THF. The bis(silylene) Fe complexes 1-3 could be used as effective catalysts for dinitrogen silylation, with complex 3 demonstrating the highest turnover number (TON) of 746 equiv among the three complexes. The catalytic mechanism was explored, revealing the involvement of the pentacoordinated bis(dinitrogen) iron(0) complexes [SiCHRSi]Fe(N2)2(THF), (4)-(6), as the active catalysts in the dinitrogen silylation reaction. Additionally, the cyclic silylene compound 10 was obtained from the reaction of L1 with KC8. Single-crystal X-ray diffraction analyses confirmed the molecular structures of complexes 1-3 and 10 in the solid state.
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Affiliation(s)
- Wenjing Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China
| | - Xiaomiao Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China
| | - Sheng-Yong Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China
| | - Qingshuang Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China
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4
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Boyd EA, Peters JC. Highly Selective Fe-Catalyzed Nitrogen Fixation to Hydrazine Enabled by Sm(II) Reagents with Tailored Redox Potential and p Ka. J Am Chem Soc 2023. [PMID: 37376713 DOI: 10.1021/jacs.3c03352] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Controlling product selectivity in multiproton, multielectron reductions of unsaturated small molecules is of fundamental interest in catalysis. For the N2 reduction reaction (N2RR) in particular, parameters that dictate selectivity for either the 6H+/6e- product ammonia (NH3) or the 4H+/4e- product hydrazine (N2H4) are poorly understood. To probe this issue, we have developed conditions to invert the selectivity of a tris(phosphino)borane iron catalyst (Fe), with which NH3 is typically the major product of N2R, to instead favor N2H4 as the sole observed fixed-N product (>99:1). This dramatic shift is achieved by replacing moderate reductants and strong acids with a very strongly reducing but weakly acidic SmII-(2-pyrrolidone) core supported by a hexadentate dianionic macrocyclic ligand (SmII-PH) as the net hydrogen-atom donor. The activity and efficiency of the catalyst with this reagent remain high (up to 69 equiv of N2H4 per Fe and 67% fixed-N yield per H+). However, by generating N2H4 as the kinetic product, the overpotential of this Sm-driven reaction is 700 mV lower than that of the mildest reported set of NH3-selective conditions with Fe. Mechanistic data support assignment of iron hydrazido(2-) species FeNNH2 as selectivity-determining: we infer that protonation of FeNNH2 at Nβ, favored by strong acids, releases NH3, whereas one-electron reduction to FeNNH2-, favored by strong reductants such as SmII-PH, produces N2H4 via reactivity initiated at Nα. Spectroscopic data also implicate a role for SmIII-binding to anionic FeN2- (via an Fe-N2- -SmIII species) with respect to catalytic efficacy.
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Affiliation(s)
- Emily A Boyd
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), Pasadena, California 91125, United States
| | - Jonas C Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), Pasadena, California 91125, United States
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5
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Garrido-Barros P, Chalkley MJ, Peters JC. Light Alters the NH 3 vs N 2 H 4 Product Profile in Iron-catalyzed Nitrogen Reduction via Dual Reactivity from an Iron Hydrazido (Fe=NNH 2 ) Intermediate. Angew Chem Int Ed Engl 2023; 62:e202216693. [PMID: 36592374 PMCID: PMC9998131 DOI: 10.1002/anie.202216693] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 01/01/2023] [Accepted: 01/02/2023] [Indexed: 01/03/2023]
Abstract
Whereas synthetically catalyzed nitrogen reduction (N2 R) to produce ammonia is widely studied, catalysis to instead produce hydrazine (N2 H4 ) has received less attention despite its considerable mechanistic interest. Herein, we disclose that irradiation of a tris(phosphine)borane (P3 B ) Fe catalyst, P3 B Fe+ , significantly alters its product profile to increase N2 H4 versus NH3 ; P3 B Fe+ is otherwise known to be highly selective for NH3 . We posit a key terminal hydrazido intermediate, P3 B Fe=NNH2 , as selectivity-determining. Whereas its singlet ground state undergoes protonation to liberate NH3 , a low-lying triplet excited state leads to reactivity at Nα and formation of N2 H4 . Associated electrochemical and spectroscopic studies establish that N2 H4 lies along a unique product pathway; NH3 is not produced from N2 H4 . Our findings are distinct from the canonical mechanism for hydrazine formation, which proceeds via a diazene (HN=NH) intermediate and showcase light as a tool to tailor selectivity.
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Affiliation(s)
- Pablo Garrido-Barros
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), 1200 E California Blvd, Pasadena, CA-91125, USA
| | - Matthew J Chalkley
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), 1200 E California Blvd, Pasadena, CA-91125, USA
| | - Jonas C Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), 1200 E California Blvd, Pasadena, CA-91125, USA
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6
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Near ambient N2 fixation on solid electrodes versus enzymes and homogeneous catalysts. Nat Rev Chem 2023; 7:184-201. [PMID: 37117902 DOI: 10.1038/s41570-023-00462-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/31/2022] [Indexed: 02/04/2023]
Abstract
The Mo/Fe nitrogenase enzyme is unique in its ability to efficiently reduce dinitrogen to ammonia at atmospheric pressures and room temperature. Should an artificial electrolytic device achieve the same feat, it would revolutionize fertilizer production and even provide an energy-dense, truly carbon-free fuel. This Review provides a coherent comparison of recent progress made in dinitrogen fixation on solid electrodes, homogeneous catalysts and nitrogenases. Specific emphasis is placed on systems for which there is unequivocal evidence that dinitrogen reduction has taken place. By establishing the cross-cutting themes and synergies between these systems, we identify viable avenues for future research.
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7
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Huang W, Peng LY, Zhang J, Liu C, Song G, Su JH, Fang WH, Cui G, Hu S. Vanadium-Catalyzed Dinitrogen Reduction to Ammonia via a [V]═NNH 2 Intermediate. J Am Chem Soc 2023; 145:811-821. [PMID: 36596224 DOI: 10.1021/jacs.2c08000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The catalytic transformation of N2 to NH3 by transition metal complexes is of great interest and importance but has remained a challenge to date. Despite the essential role of vanadium in biological N2 fixation, well-defined vanadium complexes that can catalyze the conversion of N2 to NH3 are scarce. In particular, a V(NxHy) intermediate derived from proton/electron transfer reactions of coordinated N2 remains unknown. Here, we report a dinitrogen-bridged divanadium complex bearing POCOP (2,6-(tBu2PO)2-C6H3) pincer and aryloxy ligands, which can serve as a catalyst for the reduction of N2 to NH3 and N2H4. Low-temperature protonation and reduction of the dinitrogen complex afforded the first structurally characterized neutral metal hydrazido(2-) species ([V]═NNH2), which mediated 15N2 conversion to 15NH3, indicating that it is a plausible intermediate of the catalysis. DFT calculations showed that the vanadium hydrazido complex [V]═NNH2 possessed a N-H bond dissociation free energy (BDFEN-H) of as high as 59.1 kcal/mol. The protonation of a vanadium amide complex ([V]-NH2) with [Ph2NH2][OTf] resulted in the release of NH3 and the formation of a vanadium triflate complex, which upon reduction under N2 afforded the vanadium dinitrogen complex. These transformations model the final steps of a vanadium-catalyzed N2 reduction cycle. Both experimental and theoretical studies suggest that the catalytic reaction may proceed via a distal pathway to liberate NH3. These findings provide unprecedented insights into the mechanism of N2 reduction related to FeV nitrogenase.
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Affiliation(s)
- Wenshuang Huang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Ling-Ya Peng
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Jiayu Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Chenrui Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Guoyong Song
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Ji-Hu Su
- CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Shaowei Hu
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
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8
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Tanabe Y, Nishibayashi Y. Recent advances in catalytic nitrogen fixation using transition metal–dinitrogen complexes under mild reaction conditions. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Bora D, Gayen FR, Saha B. Ammonia from dinitrogen at ambient conditions by organometallic catalysts. RSC Adv 2022; 12:33567-33583. [PMID: 36505716 PMCID: PMC9682445 DOI: 10.1039/d2ra06156b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/15/2022] [Indexed: 11/24/2022] Open
Abstract
Fixation of atmospheric dinitrogen in plants by [Mo-Fe] cofactor of nitrogenase enzyme takes place efficiently under atmospheric pressure and normal temperature. In search for an alternative methodology for the highly energy intensive Haber-Bosch process, design and synthesis of highly efficient inorganic and organometallic complexes by mimicking the structure and function of [Mo-Fe] cofactor system is highly desirable for ammonia synthesis from dinitrogen. An ideal catalyst for ammonia synthesis should effectively catalyse the reduction of dinitrogen in the presence of a proton source under mild to moderate conditions, and thereby, significantly reducing the cost of ammonia production and increasing the energy efficacy of the process. In the light of current research, it is evident that there is a plenty of scope for the development and enhanced performance of the inorganic and organometallic catalysts for ammonia synthesis under ambient temperature and pressure. The review furnishes a comprehensive outlook of numerous organometallic catalysts used in the synthesis of ammonia from dinitrogen in the past few decades.
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Affiliation(s)
- Debashree Bora
- Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and TechnologyJorhatAssam-785006India,Academy of Scientific and Innovative Research (AcSIR)Ghaziabad-201002India
| | - Firdaus Rahaman Gayen
- Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and TechnologyJorhatAssam-785006India,Academy of Scientific and Innovative Research (AcSIR)Ghaziabad-201002India
| | - Biswajit Saha
- Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and TechnologyJorhatAssam-785006India,Academy of Scientific and Innovative Research (AcSIR)Ghaziabad-201002India
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10
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Regenauer NI, Wadepohl H, Roşca D. Terminal N 2 Dissociation in [(PNN)Fe(N 2 )] 2 (μ-N 2 ) Leads to Local Spin-State Changes and Augmented Bridging N 2 Activation. Chemistry 2022; 28:e202202172. [PMID: 35916757 PMCID: PMC9804668 DOI: 10.1002/chem.202202172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Indexed: 01/09/2023]
Abstract
Nitrogen fixation at iron centres is a fundamental catalytic step for N2 utilisation, relevant to biological (nitrogenase) and industrial (Haber-Bosch) processes. This step is coupled with important electronic structure changes which are currently poorly understood. We show here for the first time that terminal dinitrogen dissociation from iron complexes that coordinate N2 in a terminal and bridging fashion leaves the Fe-N2 -Fe unit intact but significantly enhances the degree of N2 activation (Δν≈180 cm-1 , Raman spectroscopy) through charge redistribution. The transformation proceeds with local spin state change at the iron centre (S= 1 / 2 ${{ 1/2 }}$ →S=3 /2 ). Further dissociation of the bridging N2 can be induced under thermolytic conditions, triggering a disproportionation reaction, from which the tetrahedral (PNN)2 Fe could be isolated. This work shows that dinitrogen activation can be induced in the absence of external chemical stimuli such as reducing agents or Lewis acids.
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Affiliation(s)
- Nicolas I. Regenauer
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 276Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 276Germany
| | - Dragoş‐Adrian Roşca
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 276Germany
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11
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Ashida Y, Egi A, Arashiba K, Tanaka H, Mitsumoto T, Kuriyama S, Yoshizawa K, Nishibayashi Y. Catalytic Reduction of Dinitrogen into Ammonia and Hydrazine by Using Chromium Complexes Bearing PCP-Type Pincer Ligands. Chemistry 2022; 28:e202200557. [PMID: 35199891 DOI: 10.1002/chem.202200557] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 11/10/2022]
Abstract
A series of chromium-halide, -nitride, and -dinitrogen complexes bearing carbene- and phosphine-based PCP-type pincer ligands has been newly prepared, and some of them are found to work as effective catalysts to reduce dinitrogen under atmospheric pressure, whereby up to 11.60 equiv. of ammonia and 2.52 equiv. of hydrazine (16.6 equiv. of fixed N atom) are produced based on the chromium atom. To the best of our knowledge, this is the first successful example of chromium-catalyzed conversion of dinitrogen to ammonia and hydrazine under mild reaction conditions.
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Affiliation(s)
- Yuya Ashida
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Akihito Egi
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Kazuya Arashiba
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Hiromasa Tanaka
- School of Liberal Arts and Sciences, Daido University, Minami-ku, Nagoya, Japan
| | - Taichi Mitsumoto
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Shogo Kuriyama
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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12
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Kuriyama S, Kato T, Tanaka H, Konomi A, Yoshizawa K, Nishibayashi Y. Catalytic Reduction of Dinitrogen to Ammonia and Hydrazine Using Iron–Dinitrogen Complexes Bearing Anionic Benzene-Based PCP-type Pincer Ligands. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220048] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shogo Kuriyama
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Takeru Kato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Hiromasa Tanaka
- School of Liberal Arts and Sciences, Daido University, Minami-ku, Nagoya 457-8530
| | - Asuka Konomi
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
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13
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Yang J, Zhuo Q, Mo Z, Hou Z, Luo Y. Theoretical mechanistic insights into dinitrogen cleavage by a dititanium hydride complex bearing PNP-pincer ligands. Dalton Trans 2021; 51:918-926. [PMID: 34935827 DOI: 10.1039/d1dt03852d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The mechanism of dinitrogen cleavage by a PNP-coordinated dititanium polyhydride complex has been computationally investigated. A "multi-state reactivity" scenario has been disclosed for the whole process of N2 coordination and activation. Remarkably, the H2 elimination prior to the N-N cleavage is accomplished by the coupling of two terminal hydrides, and planar PNP-pincer ligand could stabilize the corresponding transition state. Besides, the tetrahydrofuran (THF) solvent could also promote the H2 elimination due to the similar polarity of the corresponding intermediates or transition states to THF molecule.
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Affiliation(s)
- Jimin Yang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Qingde Zhuo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, and Advanced Catalysis Research Group, RIKEN Centre for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Zhenbo Mo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, and Advanced Catalysis Research Group, RIKEN Centre for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. .,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, and Advanced Catalysis Research Group, RIKEN Centre for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. .,PetroChina Petrochemical Research Institute, Beijing, 102206, China
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14
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Chang G, Zhang P, Yang W, Dong Y, Xie S, Sun H, Li X, Fuhr O, Fenske D. Synthesis of silyl iron dinitrogen complexes for activation of dihydrogen and catalytic silylation of dinitrogen. Dalton Trans 2021; 50:17594-17602. [PMID: 34792061 DOI: 10.1039/d1dt02832d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three novel iron dinitrogen hydrides, [FeH(iPr-PSiMeP)(N2)(PMe3)] (1), [FeH(iPr-PSiPhP)(N2)(PMe3)] (2), and [FeH(iPr-PSiPh)(N2)(PMe3)] (3), supported by a silyl ligand are synthesized for the first time by changing the electronic effect and steric hindrance of the ligands through the reaction of ligands L1-L3 with Fe(PMe3)4 in a nitrogen atmosphere. The ligands containing an electron-donating group with large steric hindrance on the phosphorus atom are beneficial for the formation of dinitrogen complexes. A penta-coordinate iron hydride [FeH(iPr-PSiPh)(PMe3)2] (4) was formed through the reaction of ligand L3 with Fe(PMe3)4 in an argon atmosphere under the same conditions. The reactions between complexes 1-3 with an atmospheric pressure of dihydrogen gas resulted in Fe(II) dihydrides, [(iPr-PSiMe(μ-H)P)Fe(H)2(PMe3)] (5), [(iPr-PSiPh(μ-H)P)Fe(H)2(PMe3)] (6) and [(iPr-PSiPh(μ-H))Fe(H)2(PMe3)2] (7), with an η2-(Si-H) coordination. The isolation of dihydrides 5-7 demonstrates the ability of the dinitrogen complexes 1-3 to realize the activation of dihydrogen under ambient temperature and pressure. The molecular structures of complexes 1-7 were elucidated by single crystal X-ray diffraction analysis. The iron dinitrogen hydrides 1-3 are effective catalysts for the silylation of dinitrogen under ambient conditions and among them 3 is the best catalyst.
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Affiliation(s)
- Guoliang Chang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Peng Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Wenjing Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Yanhong Dong
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Shangqing Xie
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People's Republic of China.
| | - Olaf Fuhr
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Dieter Fenske
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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15
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Kuriyama S, Zhao W, Nishibayashi Y. Synthesis and Characterization of Rhodium Complex Bearing Anionic CNC‐Type Pincer Ligand with Pyrrolide and Imidazo[1,5‐
a
]pyridin‐3‐ylidene Moieties. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shogo Kuriyama
- Department of Applied Chemistry School of Engineering The University of Tokyo, Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Wenhao Zhao
- Department of Applied Chemistry School of Engineering The University of Tokyo, Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry School of Engineering The University of Tokyo, Hongo Bunkyo-ku Tokyo 113-8656 Japan
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16
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Weber JE, Hasanayn F, Fataftah M, Mercado BQ, Crabtree RH, Holland PL. Electronic and Spin-State Effects on Dinitrogen Splitting to Nitrides in a Rhenium Pincer System. Inorg Chem 2021; 60:6115-6124. [PMID: 33847125 DOI: 10.1021/acs.inorgchem.0c03778] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bimetallic nitrogen (N2) splitting to form metal nitrides is an attractive method for N2 fixation. Although a growing number of pincer-supported systems can bind and split N2, the precise relationship between the ligand properties and N2 binding/splitting remains elusive. Here we report the first example of an N2-bridged rhenium(III) complex, [(trans-P2tBuPyrr)ReCl2]2(μ-η1:η1-N2) (P2tBuPyrr = [2,5-(CH2PtBu2)2C4H2N]-). In this case, N2 binding occurs at a higher oxidation level than that in other reported pincer analogues. Analysis of the electronic structure through computational studies shows that the weakly π-donor pincer ligand stabilizes an open-shell electronic configuration that leads to enhanced binding of N2 in the bridged complex. Utilizing SQUID magnetometry, we demonstrate a singlet ground state for this Re-N-N-Re complex, and we offer tentative explanations for antiferromagnetic coupling of the two local S = 1 sites. Reduction and subsequent heating of the rhenium(III)-dinitrogen complex leads to chloride loss and cleavage of the N-N bond with isolation of the terminal rhenium(V) nitride complex (P2tBuPyrr)ReNCl.
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Affiliation(s)
- Jeremy E Weber
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Faraj Hasanayn
- Department of Chemistry, American University of Beirut, Beirut 1107 2020, Lebanon
| | - Majed Fataftah
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Brandon Q Mercado
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Robert H Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Patrick L Holland
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
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17
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Tanabe Y, Nishibayashi Y. Comprehensive insights into synthetic nitrogen fixation assisted by molecular catalysts under ambient or mild conditions. Chem Soc Rev 2021; 50:5201-5242. [PMID: 33651046 DOI: 10.1039/d0cs01341b] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
N2 is fixed as NH3 industrially by the Haber-Bosch process under harsh conditions, whereas biological nitrogen fixation is achieved under ambient conditions, which has prompted development of alternative methods to fix N2 catalyzed by transition metal molecular complexes. Since the early 21st century, catalytic conversion of N2 into NH3 under ambient conditions has been achieved by using molecular catalysts, and now H2O has been utilized as a proton source with turnover frequencies reaching the values found for biological nitrogen fixation. In this review, recent advances in the development of molecular catalysts for synthetic N2 fixation under ambient or mild conditions are summarized, and potential directions for future research are also discussed.
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Affiliation(s)
- Yoshiaki Tanabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
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18
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Collett JD, Ransohoff RW, Krause JA, Guan H. An Iron‐Hydrogen Bond Resistant to Protonation and Oxidation. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Joel D. Collett
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221-0172 United States
| | - Rebecca W. Ransohoff
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221-0172 United States
| | - Jeanette A. Krause
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221-0172 United States
| | - Hairong Guan
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221-0172 United States
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19
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Kuriyama S, Nishibayashi Y. Development of catalytic nitrogen fixation using transition metal complexes not relevant to nitrogenases. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131986] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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20
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Ashida Y, Nishibayashi Y. Catalytic conversion of nitrogen molecule into ammonia using molybdenum complexes under ambient reaction conditions. Chem Commun (Camb) 2021; 57:1176-1189. [PMID: 33443504 DOI: 10.1039/d0cc07146c] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrogen fixation using homogeneous transition metal complexes under mild reaction conditions is a challenging topic in the field of chemistry. Several successful examples of the catalytic conversion of nitrogen molecule into ammonia using various transition metal complexes in the presence of reductants and proton sources have been reported so far, together with detailed investigations on the reaction mechanism. Among these, only molybdenum complexes have been shown to serve as effective catalysts under ambient reaction conditions, in stark contrast with other transition metal-catalysed reactions that proceed at low reaction temperature such as -78 °C. In this feature article, we classify the molybdenum-catalysed reactions into four types: reactions via the Schrock cycle, reactions via dinuclear reaction systems, reactions via direct cleavage of the nitrogen-nitrogen triple bond of dinitrogen, and reactions via the Chatt-type cycle. We describe these catalytic systems focusing on the catalytic activity and mechanistic investigations. We hope that the present feature article provides useful information to develop more efficient nitrogen fixation systems under mild reaction conditions.
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Affiliation(s)
- Yuya Ashida
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
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21
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Idelson C, Webster L, Krämer T, Chadwick FM. Asymmetric bis-PNP pincer complexes of zirconium and hafnium - a measure of hemilability. Dalton Trans 2020; 49:16653-16656. [PMID: 33191415 DOI: 10.1039/d0dt03544k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Asymmetrically-bound pyrrolide-based bis-PNP pincer complexes of zirconium and hafnium have been formed. The [κ2-PNPPh][κ3-PNPPh]MCl2 species are in direct contrast to previous zirconium PNP pincer complexes. The pincer ligands are fluxional in their binding and the energy barrier for exchange has been approximated using VT-NMR spectroscopy and the result validated by DFT calculations.
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Affiliation(s)
- Celia Idelson
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City, Shepherds Bush, London, W12 0BZ, UK.
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22
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Li L, Martirez JMP, Carter EA. Prediction of Highly Selective Electrocatalytic Nitrogen Reduction at Low Overpotential on a Mo-Doped g-GaN Monolayer. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03140] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lesheng Li
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544-5263, United States
| | | | - Emily A. Carter
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544-5263, United States
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23
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Abstract
Our planet urgently needs sustainable solutions to alleviate the anthropogenic global warming and climate change. Homogeneous catalysis has the potential to play a fundamental role in this process, providing novel, efficient, and at the same time eco-friendly routes for both chemicals and energy production. In particular, pincer-type ligation shows promising properties in terms of long-term stability and selectivity, as well as allowing for mild reaction conditions and low catalyst loading. Indeed, pincer complexes have been applied to a plethora of sustainable chemical processes, such as hydrogen release, CO2 capture and conversion, N2 fixation, and biomass valorization for the synthesis of high-value chemicals and fuels. In this work, we show the main advances of the last five years in the use of pincer transition metal complexes in key catalytic processes aiming for a more sustainable chemical and energy production.
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24
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Kawakami R, Kuriyama S, Tanaka H, Konomi A, Yoshizawa K, Nishibayashi Y. Iridium-catalyzed Formation of Silylamine from Dinitrogen under Ambient Reaction Conditions. CHEM LETT 2020. [DOI: 10.1246/cl.200254] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ryosuke Kawakami
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shogo Kuriyama
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiromasa Tanaka
- School of Liberal Arts and Science, Daido University, Minami-ku, Nagoya, Aichi 457-8530, Japan
| | - Asuka Konomi
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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25
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Ott JC, Wadepohl H, Gade LH. Opening up the Valence Shell: A T-Shaped Iron(I) Metalloradical and Its Potential for Atom Abstraction. Angew Chem Int Ed Engl 2020; 59:9448-9452. [PMID: 32196900 PMCID: PMC7318345 DOI: 10.1002/anie.202003118] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Indexed: 11/06/2022]
Abstract
A thermally stable, T-shaped, d7 high-spin iron(I) complex was obtained by reduction of a PNP-supported ferrous chloride. Paramagnetic NMR spectroscopy combined with DFT modeling was used to analyze the electronic structure of the coordinatively highly unsaturated complex. The metalloradical character of the compound was demonstrated by the formation of a benzophenone ketyl radical complex upon addition of benzophenone. Furthermore, the compound displays a rich chemistry as an oxygen-atom abstractor from epoxides, yielding a dinuclear, diferrous [Fe2 O] complex.
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Affiliation(s)
- Jonas C. Ott
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
| | - Hubert Wadepohl
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
| | - Lutz H. Gade
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
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26
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Merz LS, Ballmann J, Gade LH. Phosphines and
N
‐Heterocycles Joining Forces: an Emerging Structural Motif in PNP‐Pincer Chemistry. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000206] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lukas S. Merz
- Anorganisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Joachim Ballmann
- Anorganisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz H. Gade
- Anorganisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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27
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Chalkley MJ, Drover MW, Peters JC. Catalytic N 2-to-NH 3 (or -N 2H 4) Conversion by Well-Defined Molecular Coordination Complexes. Chem Rev 2020; 120:5582-5636. [PMID: 32352271 DOI: 10.1021/acs.chemrev.9b00638] [Citation(s) in RCA: 187] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nitrogen fixation, the six-electron/six-proton reduction of N2, to give NH3, is one of the most challenging and important chemical transformations. Notwithstanding the barriers associated with this reaction, significant progress has been made in developing molecular complexes that reduce N2 into its bioavailable form, NH3. This progress is driven by the dual aims of better understanding biological nitrogenases and improving upon industrial nitrogen fixation. In this review, we highlight both mechanistic understanding of nitrogen fixation that has been developed, as well as advances in yields, efficiencies, and rates that make molecular alternatives to nitrogen fixation increasingly appealing. We begin with a historical discussion of N2 functionalization chemistry that traverses a timeline of events leading up to the discovery of the first bona fide molecular catalyst system and follow with a comprehensive overview of d-block compounds that have been targeted as catalysts up to and including 2019. We end with a summary of lessons learned from this significant research effort and last offer a discussion of key remaining challenges in the field.
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Affiliation(s)
- Matthew J Chalkley
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Marcus W Drover
- 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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28
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Ott JC, Wadepohl H, Gade LH. Öffnung der Valenzschale: Ein T‐förmiges Eisen(I)‐Metalloradikal und sein Potential als Atomabstraktor. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jonas C. Ott
- Anorganisch-Chemisches InstitutUniversität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
| | - Hubert Wadepohl
- Anorganisch-Chemisches InstitutUniversität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
| | - Lutz H. Gade
- Anorganisch-Chemisches InstitutUniversität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
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29
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Li S, Wang Y, Yang W, Li K, Sun H, Li X, Fuhr O, Fenske D. N2 Silylation Catalyzed by a Bis(silylene)-Based [SiCSi] Pincer Hydrido Iron(II) Dinitrogen Complex. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00025] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shengyong Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People’s Republic of China
| | - Yajie Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People’s Republic of China
| | - Wenjing Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People’s Republic of China
| | - Kai Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People’s Republic of China
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People’s Republic of China
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People’s Republic of China
| | - Olaf Fuhr
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Dieter Fenske
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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30
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Dorantes MJ, Moore JT, Bill E, Mienert B, Lu CC. Bimetallic iron–tin catalyst for N2 to NH3 and a silyldiazenido model intermediate. Chem Commun (Camb) 2020; 56:11030-11033. [DOI: 10.1039/d0cc04563b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new tin-supported iron complex catalyzes N2 fixation. The role of this heavy main group element in the catalysis is evaluated.
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Affiliation(s)
| | - James T. Moore
- Department of Chemistry
- University of Minnesota
- Minneapolis
- USA
| | - Eckhard Bill
- Max Planck Institut für Chemische Energiekonversion
- 45470 Mülheim an der Ruhr
- Germany
| | - Bernd Mienert
- Max Planck Institut für Chemische Energiekonversion
- 45470 Mülheim an der Ruhr
- Germany
| | - Connie C. Lu
- Department of Chemistry
- University of Minnesota
- Minneapolis
- USA
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31
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Thompson CV, Tonzetich ZJ. Pincer ligands incorporating pyrrolyl units: Versatile platforms for organometallic chemistry and catalysis. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2020.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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32
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Tanabe Y, Sekiguchi Y, Tanaka H, Konomi A, Yoshizawa K, Kuriyama S, Nishibayashi Y. Preparation and reactivity of molybdenum complexes bearing pyrrole-based PNP-type pincer ligand. Chem Commun (Camb) 2020; 56:6933-6936. [DOI: 10.1039/d0cc02852e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Molybdenum complexes bearing an anionic pyrrole-based PNP-type pincer ligand have been prepared and have been found to work as catalysts for the conversion of N2 into NH3 under ambient conditions.
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Affiliation(s)
- Yoshiaki Tanabe
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Hongo
- Bunkyo-ku
| | - Yoshiya Sekiguchi
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Hongo
- Bunkyo-ku
| | - Hiromasa Tanaka
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Nishi-ku
- Fukuoka 819-0395
- Japan
| | - Asuka Konomi
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Nishi-ku
- Fukuoka 819-0395
- Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Nishi-ku
- Fukuoka 819-0395
- Japan
| | - Shogo Kuriyama
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Hongo
- Bunkyo-ku
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Hongo
- Bunkyo-ku
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33
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Zhang ZH, He P, Kang SR, Liu C, Yi XY. Reversible pyrrole-based proton storage/release in ruthenium(ii) complexes. Chem Commun (Camb) 2019; 55:14594-14597. [PMID: 31742267 DOI: 10.1039/c9cc08288c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Newly designed ruthenium(ii) complexes are reported which contain a pyridylpyrrole ligand featuring fast-responsive and reversible proton storage/release on the pyrrole group. The protonated pyrrolium acts as an acidic initiator and is capable of triggering the polymerization of 2,2-dimethyloxirane.
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Affiliation(s)
- Zheng-Hao Zhang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
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34
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Kato T, Kuriyama S, Nakajima K, Nishibayashi Y. Catalytic C-H Borylation Using Iron Complexes Bearing 4,5,6,7-Tetrahydroisoindol-2-ide-Based PNP-Type Pincer Ligand. Chem Asian J 2019; 14:2097-2101. [PMID: 30980480 DOI: 10.1002/asia.201900501] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Indexed: 01/23/2023]
Abstract
Catalytic C-H borylation has been reported using newly designed iron complexes bearing a 4,5,6,7-tetrahydroisoindol-2-ide-based PNP pincer ligand. The reaction tolerated various five-membered heteroarenes, such as pyrrole derivatives, as well as six-membered aromatic compounds, such as toluene. Successful examples of the iron-catalyzed sp3 C-H borylation of anisole derivatives were also presented.
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Affiliation(s)
- Takeru Kato
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Shogo Kuriyama
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kazunari Nakajima
- Frontier Research Center for Energy and Resources, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan
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35
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36
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Eizawa A, Arashiba K, Egi A, Tanaka H, Nakajima K, Yoshizawa K, Nishibayashi Y. Catalytic Reactivity of Molybdenum–Trihalide Complexes Bearing PCP‐Type Pincer Ligands. Chem Asian J 2019; 14:2091-2096. [DOI: 10.1002/asia.201900496] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Aya Eizawa
- Department of Systems InnovationSchool of EngineeringThe University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Kazuya Arashiba
- Department of Systems InnovationSchool of EngineeringThe University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Akihito Egi
- Institute for Materials Chemistry and EngineeringKyushu University Nishi-ku Fukuoka 819-0395 Japan
| | - Hiromasa Tanaka
- School of Liberal Arts and SciencesDaido University Takiharu-cho, Minami-ku Nagoya 457-8530 Japan
| | - Kazunari Nakajima
- Frontier Research Center for Energy and ResourcesSchool of EngineeringThe University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and EngineeringKyushu University Nishi-ku Fukuoka 819-0395 Japan
| | - Yoshiaki Nishibayashi
- Department of Systems InnovationSchool of EngineeringThe University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
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37
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Schild DJ, Peters JC. Light Enhanced Fe-Mediated Nitrogen Fixation: Mechanistic Insights Regarding H 2 Elimination, HER, and NH 3 Generation. ACS Catal 2019; 9:4286-4295. [PMID: 31467770 DOI: 10.1021/acscatal.9b00523] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Despite their proposed accumulation at the Fe sites of the FeMo-cofactor of MoFe-nitrogenase, the presence of hydride ligands in molecular model systems capable of the nitrogen reduction reaction (N2RR) appears to diminish the catalytic N2-to-NH3 conversion. We find that for an iron-based system bearing the trisphosphine ligand P2PPh, a dramatic difference in yields is observed for N2RR catalyzed by precatalysts with zero, one, or two hydride ligands; however, irradiating the three different catalysts with a mercury lamp results in similar yields. Although the efficacy for N2RR versus the hydrogen evolution reaction (HER) is modest for this system by comparison to certain iron (and other metal) catalysts, the system provides an opportunity to study the role of hydrides in the selectivity for N2RR versus HER, which is a central issue in catalyst design. Stochiometric reactions with hydride containing precatalysts reveal a hydrogen evolution cycle in which no nitrogen fixation occurs. Irradiation of the dihydride precatalysts, observed during turnover, results in H2 elimination and formation of (P2PPh)Fe(N2)2, which itself is unreactive with acids at low temperature. N2 functionalization does occur with acids and silyl electrophiles for the reduced species [(P2PPh)Fe(N2)]- and [(P2PPh)Fe(N2)]2-, which have been characterized independently. The requirement of accessing such low formal oxidation states explains the need for strong reductants. The low selectivity of the system for functionalization at Nβ versus Fe creates off-path hydride species that participate in unproductive HER, helping to explain the low selectivity for N2RR over HER. The data presented here hence lends further insight into the growing understanding of the selectivity, activity, and required driving force relevant to iron (and other) N2RR catalysts.
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Affiliation(s)
- Dirk J. Schild
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), Pasadena, California 91125, United States
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology (Caltech), Pasadena, California 91125, United States
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Narro AL, Arman HD, Tonzetich ZJ. Manganese Chemistry of Anionic Pyrrole-Based Pincer Ligands. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00058] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ana L. Narro
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, United States
| | - Hadi D. Arman
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, United States
| | - Zachary J. Tonzetich
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, United States
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Field LD, Li HL, Dalgarno SJ, McIntosh RD. Ammonia and Hydrazine from Coordinated Dinitrogen by Complexes of Iron(0). Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Leslie D. Field
- School of Chemistry University of New South Wales NSW 2052 Australia
| | - Hsiu L. Li
- School of Chemistry University of New South Wales NSW 2052 Australia
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Yin J, Li J, Wang GX, Yin ZB, Zhang WX, Xi Z. Dinitrogen Functionalization Affording Chromium Hydrazido Complex. J Am Chem Soc 2019; 141:4241-4247. [DOI: 10.1021/jacs.9b00822] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jianhao Yin
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular
Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Jiapeng Li
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular
Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Gao-Xiang Wang
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular
Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhu-Bao Yin
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular
Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular
Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular
Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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41
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Das S, Subramaniyan V, Mani G. Nickel(II) and Palladium(II) Complexes Bearing an Unsymmetrical Pyrrole-Based PNN Pincer and Their Norbornene Polymerization Behaviors versus the Symmetrical NNN and PNP Pincers. Inorg Chem 2019; 58:3444-3456. [PMID: 30767515 DOI: 10.1021/acs.inorgchem.8b03562] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Unsymmetrical pincers have been shown to be better than the corresponding symmetrical pincers in several catalysis reactions. A new unsymmetrical PNN propincer, 2-(3,5-dimethylpyrazolylmethyl)-5-(diphenylphosphinomethyl)pyrrole (1), was synthesized from pyrrole through Mannich bases in a good yield. In addition, the new byproduct 2-(3,5-dimethylpyrazolylmethyl)-5-(dimethylaminomethyl)- N-(hydroxymethyl)pyrrole was also isolated. The reaction of 1 with [PdCl2(PhCN)2] and Et3N in toluene yielded [PdCl{C4H2N-2-(CH2Me2pz)-5-(CH2PPh2)-κ3 P,N,N}] (2). The analogous reaction between 1 and [NiCl2(DME)] or NiX2 (X = Br, I) in the presence of NEt3 in acetonitrile afforded [NiX{C4H2N-2-(CH2Me2pz)-5-(CH2PPh2)-κ3 P,N,N}] (3; X = Cl, Br, I). All complexes were structurally characterized. The norbornene polymerization behaviors of the unsymmetrical pincer complexes 2 and 3 in the presence of MMAO or EtAlCl2 were compared with those of the symmetrical pincer complexes chloro[2,5-bis(3,5-dimethylpyrazolylmethyl)pyrrolido]palladium(II) (NNN), chloro[2,5-bis(diphenylphosphinomethyl)pyrrolido]palladium(II), and chloro[2,5-bis(diphenylphosphinomethyl)pyrrolido]nickel(II) (PNP) at different temperatures. The PNN and NNN complexes exhibited far greater activity on the order of 107 g of PNB/mol/h, with quantitative yields in some cases, in comparison to the PNP pincer palladium and nickel complexes. This trend was also supported by the iPr group substituted PNP nickel and palladium pincer complexes. These polymerization behaviors are explained using steric crowding around the metal atom with the support of NMR studies and suggested that the activity increases as the Npyrazole donor increases. Polymers were characterized by 1H NMR, IR, TGA, and powder XRD methods.
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Affiliation(s)
- Sanghamitra Das
- Department of Chemistry , Indian Institute of Technology Kharagpur , Kharagpur , West Bengal , India 721 302
| | - Vasudevan Subramaniyan
- Department of Chemistry , Indian Institute of Technology Kharagpur , Kharagpur , West Bengal , India 721 302
| | - Ganesan Mani
- Department of Chemistry , Indian Institute of Technology Kharagpur , Kharagpur , West Bengal , India 721 302
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42
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43
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Nishibayashi Y. Development of catalytic nitrogen fixation using transition metal-dinitrogen complexes under mild reaction conditions. Dalton Trans 2018; 47:11290-11297. [PMID: 30087974 DOI: 10.1039/c8dt02572j] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes our recent progress in catalytic nitrogen fixation using transition metal-dinitrogen complexes as catalysts. Our research group has recently developed novel reaction systems for the catalytic transformation of molecular dinitrogen into ammonia and hydrazine using molybdenum-, iron-, cobalt- and vanadium-dinitrogen complexes under mild reaction conditions. The new findings presented in this paper may provide a new approach to the development of economical nitrogen fixation to replace the energy-consuming Haber-Bosch process.
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Affiliation(s)
- Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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44
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Kumar S, Jana O, Subramaniyan V, Mani G. The ‘reverse transmetalation’ reaction of the pyrrole-based PNP pincer Ni(II) complexes: X-ray structures of binuclear silver(I) and thiocyanate nickel(II) complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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45
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Krishnan VM, Davis I, Baker TM, Curran DJ, Arman HD, Neidig ML, Liu A, Tonzetich ZJ. Backbone Dehydrogenation in Pyrrole-Based Pincer Ligands. Inorg Chem 2018; 57:9544-9553. [PMID: 30040391 DOI: 10.1021/acs.inorgchem.8b01643] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Treatment of both [CoCl( tBuPNP)] and [NiCl( tBuPNP)] ( tBuPNP = anion of 2,5-bis((di- tert-butylphosphino)methyl)pyrrole) with one equivalent of benzoquinone affords the corresponding chloride complexes containing a dehydrogenated PNP ligand, tBudPNP ( tBudPNP = anion of 2,5-bis((di- tert-butylphosphino)methylene)-2,5-dihydropyrrole). Dehydrogenation of PNP to dPNP results in minimal change to steric profile of the ligand but has important consequences for the resulting redox potentials of the metal complexes, resulting in the ability to isolate both [CoH( tBudPNP)] and [CoEt( tBudPNP)], which are more challenging (hydride) or not possible (ethyl) to prepare with the parent PNP ligand. Electrochemical measurements with both the Co and Ni dPNP species demonstrate a substantial shift in redox potentials for both the M(II/III) and M(II/I) couples. In the case of the former, oxidation to trivalent Co was found to be reversible, and subsequent reaction with AgSbF6 afforded a rare example of a square-planar Co(III) species. Corresponding reduction of [CoCl( tBudPNP)] with KC8 produced the diamagnetic Co(I) species, [Co(N2)( tBudPNP)]. Further reduction of the Co(I) complex was found to generate a pincer-based π-radical anion that demonstrated well-resolved EPR features to the four hydrogen atoms and lone nitrogen atom of the ligand with minor contributions from cobalt and coordinated N2. Changes in the electronic character of the PNP ligand upon dehydrogenation are proposed to result from loss of aromaticity in the pyrrole ligand, resulting in a more reducing central amido donor. DFT calculations on the Co(II) complexes were performed to shed further insight into the electronic structure of the pincer complexes.
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Affiliation(s)
- V Mahesh Krishnan
- Department of Chemistry , University of Texas at San Antonio (UTSA) , San Antonio , Texas 78249 , United States
| | - Ian Davis
- Department of Chemistry , University of Texas at San Antonio (UTSA) , San Antonio , Texas 78249 , United States
| | - Tessa M Baker
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , United States
| | - Daniel J Curran
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , United States
| | - Hadi D Arman
- Department of Chemistry , University of Texas at San Antonio (UTSA) , San Antonio , Texas 78249 , United States
| | - Michael L Neidig
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , United States
| | - Aimin Liu
- Department of Chemistry , University of Texas at San Antonio (UTSA) , San Antonio , Texas 78249 , United States
| | - Zachary J Tonzetich
- Department of Chemistry , University of Texas at San Antonio (UTSA) , San Antonio , Texas 78249 , United States
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46
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Foster SL, Bakovic SIP, Duda RD, Maheshwari S, Milton RD, Minteer SD, Janik MJ, Renner JN, Greenlee LF. Catalysts for nitrogen reduction to ammonia. Nat Catal 2018. [DOI: 10.1038/s41929-018-0092-7] [Citation(s) in RCA: 676] [Impact Index Per Article: 112.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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47
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Sekiguchi Y, Arashiba K, Tanaka H, Eizawa A, Nakajima K, Yoshizawa K, Nishibayashi Y. Catalytic Reduction of Molecular Dinitrogen to Ammonia and Hydrazine Using Vanadium Complexes. Angew Chem Int Ed Engl 2018; 57:9064-9068. [DOI: 10.1002/anie.201802310] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/27/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Yoshiya Sekiguchi
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Kazuya Arashiba
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Hiromasa Tanaka
- Institute for Materials Chemistry and Engineering; Kyushu University; Nishi-ku Fukuoka 819-0395 Japan
| | - Aya Eizawa
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Kazunari Nakajima
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering; Kyushu University; Nishi-ku Fukuoka 819-0395 Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
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48
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Sekiguchi Y, Arashiba K, Tanaka H, Eizawa A, Nakajima K, Yoshizawa K, Nishibayashi Y. Catalytic Reduction of Molecular Dinitrogen to Ammonia and Hydrazine Using Vanadium Complexes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802310] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yoshiya Sekiguchi
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Kazuya Arashiba
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Hiromasa Tanaka
- Institute for Materials Chemistry and Engineering; Kyushu University; Nishi-ku Fukuoka 819-0395 Japan
| | - Aya Eizawa
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Kazunari Nakajima
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering; Kyushu University; Nishi-ku Fukuoka 819-0395 Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation; School of Engineering; University of Tokyo, Bunkyo-ku; Tokyo 113-8656 Japan
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49
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Wang Z, Yu Z, Zhao J. Computational screening of a single transition metal atom supported on the C2N monolayer for electrochemical ammonia synthesis. Phys Chem Chem Phys 2018; 20:12835-12844. [DOI: 10.1039/c8cp01215f] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The single Mo atom supported by C2N layer is an effective electrocatalyst for NH3 synthesis from N2.
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Affiliation(s)
- Zhongxu Wang
- College of Chemistry and Chemical Engineering
- Key Laboratory of Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin
| | - Zhigang Yu
- School of Chemistry and Chemical Engineering
- Yangtze Normal University
- Chongqing
- China
| | - Jingxiang Zhao
- College of Chemistry and Chemical Engineering
- Key Laboratory of Photonic and Electronic Bandgap Materials
- Ministry of Education
- Harbin Normal University
- Harbin
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50
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Higuchi J, Kuriyama S, Eizawa A, Arashiba K, Nakajima K, Nishibayashi Y. Preparation and reactivity of iron complexes bearing anionic carbazole-based PNP-type pincer ligands toward catalytic nitrogen fixation. Dalton Trans 2018; 47:1117-1121. [DOI: 10.1039/c7dt04327a] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Newly prepared iron complexes bearing carbazole-based PNP-type pincer ligands are found to work as catalysts toward nitrogen fixation.
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Affiliation(s)
- Junichi Higuchi
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Shogo Kuriyama
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Aya Eizawa
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Kazuya Arashiba
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Kazunari Nakajima
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
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