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Yang F, Jiang S, Liu S, Beyer P, Mebs S, Haumann M, Roth C, Dau H. Dynamics of bulk and surface oxide evolution in copper foams for electrochemical CO 2 reduction. Commun Chem 2024; 7:66. [PMID: 38548895 PMCID: PMC10978924 DOI: 10.1038/s42004-024-01151-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 03/14/2024] [Indexed: 04/01/2024] Open
Abstract
Oxide-derived copper (OD-Cu) materials exhibit extraordinary catalytic activities in the electrochemical carbon dioxide reduction reaction (CO2RR), which likely relates to non-metallic material constituents formed in transitions between the oxidized and the reduced material. In time-resolved operando experiment, we track the structural dynamics of copper oxide reduction and its re-formation separately in the bulk of the catalyst material and at its surface using X-ray absorption spectroscopy and surface-enhanced Raman spectroscopy. Surface-species transformations progress within seconds whereas the subsurface (bulk) processes unfold within minutes. Evidence is presented that electroreduction of OD-Cu foams results in kinetic trapping of subsurface (bulk) oxide species, especially for cycling between strongly oxidizing and reducing potentials. Specific reduction-oxidation protocols may optimize formation of bulk-oxide species and thereby catalytic properties. Together with the Raman-detected surface-adsorbed *OH and C-containing species, the oxide species could collectively facilitate *CO adsorption, resulting an enhanced selectivity towards valuable C2+ products during CO2RR.
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Affiliation(s)
- Fan Yang
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Shan Jiang
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Si Liu
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Paul Beyer
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Stefan Mebs
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany.
| | - Michael Haumann
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
| | - Christina Roth
- Electrochemical Process Engineering, Universität Bayreuth, Universitätsstraße 30, Bayreuth, 95447, Germany
| | - Holger Dau
- Department of Physics, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany.
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2
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Hausmann JN, Ashton M, Mebs S, Walter C, Selve S, Haumann M, Sontheimer T, Dau H, Driess M, Menezes PW. Intermetallic Cobalt Indium Nanoparticles as Oxygen Evolution Reaction Precatalyst: A Non-Leaching p-Block Element. Small 2024:e2309749. [PMID: 38368266 DOI: 10.1002/smll.202309749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/03/2024] [Indexed: 02/19/2024]
Abstract
Merely all transition-metal-based materials reconstruct into similar oxyhydroxides during the electrocatalytic oxygen evolution reaction (OER), severely limiting the options for a tailored OER catalyst design. In such reconstructions, initial constituent p-block elements take a sacrificial role and leach into the electrolyte as oxyanions, thereby losing the ability to tune the catalyst's properties systematically. From a thermodynamic point of view, indium is expected to behave differently and should remain in the solid phase under alkaline OER conditions. However, the structural behavior of transition metal indium phases during the OER remains unexplored. Herein, are synthesized intermetallic cobalt indium (CoIn3 ) nanoparticles and revealed by in situ X-ray absorption spectroscopy and scanning transmission microscopy that they undergo phase segregation to cobalt oxyhydroxide and indium hydroxide. The obtained cobalt oxyhydroxide outperforms a metallic-cobalt-derived one due to more accessible active sites. The observed phase segregation shows that indium behaves distinctively differently from most p-block elements and remains at the electrode surface, where it can form lasting interfaces with the active metal oxo phases.
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Affiliation(s)
- J Niklas Hausmann
- Material Chemistry Group for Thin Film Catalysis-CatLab, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany
| | - Marten Ashton
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
| | - Stefan Mebs
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Carsten Walter
- Material Chemistry Group for Thin Film Catalysis-CatLab, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany
| | - Sören Selve
- Center for Electron Microscopy (ZELMI), Technische Universität Berlin, Straße des 17. Juni 135, Sekr. KWT2, 10623, Berlin, Germany
| | - Michael Haumann
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Tobias Sontheimer
- Strategy Department of Energy and Information, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Holger Dau
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Matthias Driess
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
| | - Prashanth W Menezes
- Material Chemistry Group for Thin Film Catalysis-CatLab, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
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3
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Devi T, Dutta K, Deutscher J, Mebs S, Kuhlmann U, Haumann M, Cula B, Dau H, Hildebrandt P, Ray K. A high-spin alkylperoxo-iron(iii) complex with cis-anionic ligands: implications for the superoxide reductase mechanism. Chem Sci 2024; 15:528-533. [PMID: 38179538 PMCID: PMC10762717 DOI: 10.1039/d3sc05603a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 12/05/2023] [Indexed: 01/06/2024] Open
Abstract
The N3O macrocycle of the 12-TMCO ligand stabilizes a high spin (S = 5/2) [FeIII(12-TMCO)(OOtBu)Cl]+ (3-Cl) species in the reaction of [FeII(12-TMCO)(OTf)2] (1-(OTf)2) with tert-butylhydroperoxide (tBuOOH) in the presence of tetraethylammonium chloride (NEt4Cl) in acetonitrile at -20 °C. In the absence of NEt4Cl the oxo-iron(iv) complex 2 [FeIV(12-TMCO)(O)(CH3CN)]2+ is formed, which can be further converted to 3-Cl by adding NEt4Cl and tBuOOH. The role of the cis-chloride ligand in the stabilization of the FeIII-OOtBu moiety can be extended to other anions including the thiolate ligand relevant to the enzyme superoxide reductase (SOR). The present study underlines the importance of subtle electronic changes and secondary interactions in the stability of the biologically relevant metal-dioxygen intermediates. It also provides some rationale for the dramatically different outcomes of the chemistry of iron(iii)peroxy intermediates formed in the catalytic cycles of SOR (Fe-O cleavage) and cytochrome P450 (O-O bond lysis) in similar N4S coordination environments.
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Affiliation(s)
- Tarali Devi
- Institut für Chemie, Humboldt-Universitat zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
- Department of Inorganic and Physical Chemistry, Indian Institute of Science Bangalore Karnataka-560012 India
| | - Kuheli Dutta
- Institut für Chemie, Humboldt-Universitat zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Jennifer Deutscher
- Institut für Chemie, Humboldt-Universitat zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Stefan Mebs
- Department of Physics, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Uwe Kuhlmann
- Institut für Chemie, Technische Universität Berlin Fakultät II, Straße des 17. Juni 135 10623 Berlin Germany
| | - Michael Haumann
- Department of Physics, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Beatrice Cula
- Institut für Chemie, Humboldt-Universitat zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Holger Dau
- Department of Physics, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Peter Hildebrandt
- Institut für Chemie, Technische Universität Berlin Fakultät II, Straße des 17. Juni 135 10623 Berlin Germany
| | - Kallol Ray
- Institut für Chemie, Humboldt-Universitat zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
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4
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Nikulshin PV, Makarov AY, Koskin IP, Becker CS, Kazantsev MS, Beckmann J, Balmohammadi Y, Grabowsky S, Mebs S, Naumova OV, Protasov DY, Svit KA, Irtegova IG, Radiush EA, Bagryanskaya IY, Shundrin LA, Zibarev AV. 1,2,3,4-Tetrafluorobiphenylene: A Prototype Janus-Headed Scaffold for Ambipolar Materials. Chempluschem 2023:e202300692. [PMID: 38052725 DOI: 10.1002/cplu.202300692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/01/2023] [Accepted: 12/05/2023] [Indexed: 12/07/2023]
Abstract
The title compound was synthesized by Ullmann cross-coupling in low yield as the first representative of [n]phenylene containing hydrocarbon and fluorocarbon rings. Stille/Suzuki-Miyaura cross-coupling reactions, as well as substitution of fluorine in suitable starting compounds, failed to give the same product. The geometric and electronic structures of the title compound were studied by X-ray diffraction, cyclic voltammetry and density functional theory calculations, together with Hirshfeld surface and reduced density gradient analyses. The crystal structure features head-to-tail π-stacking and other fluorine-related secondary bonding interactions. From the nucleus-independent chemical shifts descriptor, the four-membered ring of the title compound is antiaromatic, and the six-membered rings are aromatic. The Janus molecule is highly polarized; and the six-membered fluoro- and hydrocarbon rings are Lewis π-acidic and π-basic, respectively. The electrochemically-generated radical cation of the title compound is long-lived as characterized by electron paramagnetic resonance, whereas the radical anion is unstable in solution. The title compound reveals electrical properties of an insulator. On expanding its molecular scaffold towards partially fluorinated [n]phenylenes (n≥2), the properties presumably can be transformed into those of semiconductors. In this context, the title compound is suggested as a prototype scaffold for ambipolar materials for organic electronics and spintronics.
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Affiliation(s)
- Pavel V Nikulshin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
- Current address: Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
| | - Alexander Yu Makarov
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Igor P Koskin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Christina S Becker
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Maxim S Kazantsev
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Jens Beckmann
- Institute for Inorganic Chemistry and Crystallography, University of Bremen, 28359, Bremen, Germany
| | - Yaser Balmohammadi
- Department of Chemistry, Biochemistry and Pharmaceutical Science, University of Bern, 3012, Bern, Switzerland
| | - Simon Grabowsky
- Department of Chemistry, Biochemistry and Pharmaceutical Science, University of Bern, 3012, Bern, Switzerland
| | - Stefan Mebs
- Institute for Experimental Physics, Free University of Berlin, 14195, Berlin, Germany
| | - Olga V Naumova
- Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Dmitry Yu Protasov
- Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Kirill A Svit
- Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Irina G Irtegova
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Ekaterina A Radiush
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Irina Yu Bagryanskaya
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Leonid A Shundrin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Andrey V Zibarev
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
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Janssen M, Mebs S, Beckmann J. Aryldimethylelement cations of the heavier group 14 elements. An essentially three-coordinate plumbylium ion. Chem Commun (Camb) 2023. [PMID: 37226548 DOI: 10.1039/d3cc00397c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The kinetically stabilized group 14 cations [RindEMe2][B(C6F5)4] (E = Si, Sn, Pb) were prepared and fully characterized (Rind = dispiro[fluorene-9,3'-(1',1',7',7'-tetramethyl-s-hydrindacen-4'-yl)-5',9''-fluorene). The deshielded heteronuclear NMR chemical shifts (δ(29Si) = 160.4, δ(119Sn) = 619.9, δ(207Pb) = 1549.5) are indicative of the low coordination numbers.
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Affiliation(s)
- Marvin Janssen
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Str. 7, Bremen 28359, Germany.
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany.
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Str. 7, Bremen 28359, Germany.
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6
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Mebs S. In Silico Partial N 2 to NH 3 Conversion with a Light Atom Molecule. Chemphyschem 2023; 24:e202200621. [PMID: 36416275 DOI: 10.1002/cphc.202200621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 11/24/2022]
Abstract
N2 can be stepwise converted in silico into one molecule NH3 and a secondary amide with a bond activator molecule consisting only of light main group elements. The proposed N2 -activating pincer-related compound carries a silyl ion (Si(+) ) center as well as three Lewis acidic (-BF2 ) and three Lewis basic (-PMe2 ) sites, providing an efficient binding pocket for gaseous N2 within the framework of intramolecular frustrated Lewis pairs (FLP). In addition, it exhibits supportive secondary P-B and F⋅⋅⋅B contacts, which stabilize the structure. In the PSi(+) -N-N-BP environment the N≡N triple bond is extended from 1.09 Å to remarkable 1.43 Å, resembling a N-N single bond. The strongly activated N-N-fragment is prone to subsequent hydride addition and protonation steps, resulting in the energy efficient transfer of two hydrogen equivalents. The next hydride added causes the release of one molecule NH3 , but leaves the ligand system as poisoned R3 Si(+) -NH2 -PMe2 or R3 Si(+) -NH3 dead-end states behind. The study indicates that approximately tetrahedral constrained SiBP2 -pockets are capable to activate N2 , whereas the acid-rich SiB3 - and SiB2 P-pocktes, as well as the base-rich SiP3 -pockets fail, hinting towards the high relevance of the acid-base proportion and relative orientation. The electronic structure of the N2 -activated state is compared to the corresponding state of a recently published peri-substituted bond activator molecule featuring a PSi(+) -N-N-Si(+) P site (S. Mebs, J. Beckmann, Physical Chemistry Chemical Physics 2022, 24, 20953-20967).
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Affiliation(s)
- Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
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7
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Mebs S. Cover Feature:
In Silico
Partial N
2
to NH
3
Conversion with a Light Atom Molecule (ChemPhysChem 6/2023). Chemphyschem 2023. [DOI: 10.1002/cphc.202300108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
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8
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Battistella B, Lohmiller T, Cula B, Hildebrandt P, Kuhlmann U, Dau H, Mebs S, Ray K. A New Thiolate-Bound Dimanganese Cluster as a Structural and Functional Model for Class Ib Ribonucleotide Reductases. Angew Chem Int Ed Engl 2023; 62:e202217076. [PMID: 36583430 DOI: 10.1002/anie.202217076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/24/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022]
Abstract
In class Ib ribonucleotide reductases (RNRs) a dimanganese(II) cluster activates superoxide (O2 ⋅- ) rather than dioxygen (O2 ), to access a high valent MnIII -O2 -MnIV species, responsible for the oxidation of tyrosine to tyrosyl radical. In a biomimetic approach, we report the synthesis of a thiolate-bound dimanganese complex [MnII 2 (BPMT)(OAc)2 ](ClO)4 (BPMT=(2,6-bis{[bis(2-pyridylmethyl)amino]methyl}-4-methylthiophenolate) (1) and its reaction with O2 ⋅- to form a [(BPMT)MnO2 Mn]2+ complex 2. Resonance Raman investigation revealed the presence of an O-O bond in 2, while EPR analysis displayed a 16-line St =1/2 signal at g=2 typically associated with a MnIII MnIV core, as detected in class Ib RNRs. Unlike all other previously reported Mn-O2 -Mn complexes, generated by O2 ⋅- activation at Mn2 centers, 2 proved to be a capable electrophilic oxidant in aldehyde deformylation and phenol oxidation reactions, rendering it one of the best structural and functional models for class Ib RNRs.
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Affiliation(s)
- Beatrice Battistella
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Thomas Lohmiller
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany.,EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489, Berlin, Germany
| | - Beatrice Cula
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Peter Hildebrandt
- Institut für Chemie, Fakultät II, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Uwe Kuhlmann
- Institut für Chemie, Fakultät II, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Holger Dau
- Institut für Physik, Freie Universität zu Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Stefan Mebs
- Institut für Physik, Freie Universität zu Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Kallol Ray
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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Kass D, Yao S, Krause KB, Corona T, Richter L, Braun T, Mebs S, Haumann M, Dau H, Lohmiller T, Limberg C, Drieß M, Ray K. Spectroscopic Properties of a Biologically Relevant [Fe 2 (μ-O) 2 ] Diamond Core Motif with a Short Iron-Iron Distance. Angew Chem Int Ed Engl 2023; 62:e202209437. [PMID: 36541062 DOI: 10.1002/anie.202209437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 12/05/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
Diiron cofactors in enzymes perform diverse challenging transformations. The structures of high valent intermediates (Q in methane monooxygenase and X in ribonucleotide reductase) are debated since Fe-Fe distances of 2.5-3.4 Å were attributed to "open" or "closed" cores with bridging or terminal oxido groups. We report the crystallographic and spectroscopic characterization of a FeIII 2 (μ-O)2 complex (2) with tetrahedral (4C) centres and short Fe-Fe distance (2.52 Å), persisting in organic solutions. 2 shows a large Fe K-pre-edge intensity, which is caused by the pronounced asymmetry at the TD FeIII centres due to the short Fe-μ-O bonds. A ≈2.5 Å Fe-Fe distance is unlikely for six-coordinate sites in Q or X, but for a Fe2 (μ-O)2 core containing four-coordinate (or by possible extension five-coordinate) iron centres there may be enough flexibility to accommodate a particularly short Fe-Fe separation with intense pre-edge transition. This finding may broaden the scope of models considered for the structure of high-valent diiron intermediates formed upon O2 activation in biology.
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Affiliation(s)
- Dustin Kass
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Shenglai Yao
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623, Berlin, Germany
| | - Konstantin B Krause
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Teresa Corona
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Liza Richter
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Thomas Braun
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Stefan Mebs
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Michael Haumann
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Holger Dau
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Thomas Lohmiller
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany.,EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 16, 12489, Berlin, Germany
| | - Christian Limberg
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Matthias Drieß
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623, Berlin, Germany
| | - Kallol Ray
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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Janssen M, Mebs S, Beckmann J. Kinetically Stabilized Diarylpnictogenium Ions. Chempluschem 2023; 88:e202200429. [PMID: 36670087 DOI: 10.1002/cplu.202200429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/21/2022] [Indexed: 12/24/2022]
Abstract
The newly prepared and fully characterized stibenium and bismuthenium ions [Rind MesE]+ (E=Sb, Bi; Rind =dispiro[fluorene-9,3'-(1',1',7',7'-tetramethyl-s-hydrindacen-4'-yl)-5',9''-fluorene) were rigorously compared to the previously communicated phosphenium and arsenium ions (E=P, As) as well as the bis(m-terphenyl) pnictogenium ions [(2,6-Mes2 C6 H3 )2 E]+ (E=Sb, Bi). It is demonstrated that the choice of the aryl substituents dramatically effects the molecular structures (e. g. the primary E-C bond lengths) and the electronic structures (e. g. the energy of the LUMOs).
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Affiliation(s)
- Marvin Janssen
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359, Bremen, Germany
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359, Bremen, Germany
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11
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Chen Z, Yang H, Mebs S, Dau H, Driess M, Wang Z, Kang Z, Menezes PW. Reviving Oxygen Evolution Electrocatalysis of Bulk La-Ni Intermetallics via Gaseous Hydrogen Engineering. Adv Mater 2023; 35:e2208337. [PMID: 36528302 DOI: 10.1002/adma.202208337] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 12/05/2022] [Indexed: 06/17/2023]
Abstract
A hydrogen processing strategy is developed to enable bulk LaNi5 to attain high activity and long-term stability toward the electrocatalytic oxygen evolution reaction (OER). By a combination of in situ Raman and quasi in situ X-ray absorption (XAS) spectra, secondary-electron-excited scanning transmission electron microscopy (STEM) patterns as well as the Rietveld method and density functional theory (DFT) calculations, it is discovered that hydrogen-induced lattice distortion, grain refinement, and particle cracks dictate the effective reconstruction of the LaNi5 surface into a porous hetero-nanoarchitecture composed of uniformly confined active γ-NiOOH nanocrystals by La(OH)3 layer in the alkaline OER process. This significantly optimizes the charge transfer, structural integrity, active-site exposure, and adsorption energy toward the reaction intermediates. Benefiting from these merits, the overpotential (322 mV) at 100 mA cm-2 for the hydrogen-processed OER catalyst deposited on nickel foam is reduced by 104 mV as compared to the original phase. Notably, it exhibits remarkable stability for 10 days at an industrial-grade current density of more than 560 mA cm-2 in alkaline media.
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Affiliation(s)
- Ziliang Chen
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Hongyuan Yang
- Department of Chemistry, Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
| | - Stefan Mebs
- S Department of Physics, Free University of Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Holger Dau
- S Department of Physics, Free University of Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Matthias Driess
- Department of Chemistry, Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
| | - Zhaowu Wang
- School of Physics and Engineering, Longmen laboratory, Henan University of Science and Technology, Luoyang, 471023, P. R. China
| | - Zhenhui Kang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Prashanth W Menezes
- Department of Chemistry, Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
- Materials Chemistry Group for Thin Film Catalysis-CatLab, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany
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12
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Duvinage D, Mostaghimi F, Damrath M, Spils J, Komorr P, Odintsov DS, Fedin M, Shundrin LA, Mebs S, Beckmann J. Synthesis and Single-Electron Oxidation of Bulky Bis(m-terphenyl)chalcogenides: The Quest for Kinetically Stabilized Radical Cations. Chemistry 2023; 29:e202203498. [PMID: 36416222 DOI: 10.1002/chem.202203498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/22/2022] [Accepted: 11/23/2022] [Indexed: 11/24/2022]
Abstract
Sterically encumbered bis(m-terphenyl)chalcogenides, (2,6-Mes2 C6 H3 )2 E (E=S, Se, Te) were obtained by the reaction of the chalcogen tetrafluorides, EF4 , with three equivalents of m-terphenyl lithium, 2,6-Mes2 C6 H3 Li. The single-electron oxidation of (2,6-Mes2 C6 H3 )2 Te using XeF2 /K[B(C6 F5 )4 ] afforded the radical cation [(2,6-Mes2 C6 H3 )2 Te][B(C6 F5 )4 ] that was isolated and fully characterized. The electrochemical oxidation of the lighter homologs (2,6-Mes2 C6 H3 )2 E (E=S, Se) was irreversible and impaired by rapid decomposition.
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Affiliation(s)
- Daniel Duvinage
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Strasse 7, 28359, Bremen, Germany
| | - Farzin Mostaghimi
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Strasse 7, 28359, Bremen, Germany
| | - Mattis Damrath
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Strasse 7, 28359, Bremen, Germany
| | - Julian Spils
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Strasse 7, 28359, Bremen, Germany
| | - Pascal Komorr
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Strasse 7, 28359, Bremen, Germany
| | - Danila S Odintsov
- N. N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Acad. Lavrentiev Avenue 9, 630090, Novosibirsk, Russia
| | - Matvey Fedin
- Laboratory of Magnetic Resonance, International Tomography Center Siberian Branch of Russian Academy of Sciences, Institutskaya 3a, 630090, Novosibirsk, Russia
| | - Leonid A Shundrin
- N. N. Vorozhtsov Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, Acad. Lavrentiev Avenue 9, 630090, Novosibirsk, Russia
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Strasse 7, 28359, Bremen, Germany
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13
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Mebs S, Beckmann J. In silico capture and activation of methane with light atom molecules. Phys Chem Chem Phys 2023; 25:5656-5662. [PMID: 36734164 DOI: 10.1039/d2cp05821a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Methane (CH4) can be captured in silico with a light atom molecule containing only C, H, Si, O, and B atoms, respectively. A tripodal peri-substituted ligand system was employed, namely, [(5-Ph2B-xan-4-)3Si]H (1, xan = xanthene), which after hydride abstraction (1+) carries four Lewis acidic sites within the cationic cage structure. In a previous study, this system was shown to be able to capture noble gas atoms He-Kr (Mebs & Beckmann 2022). In the corresponding methane complex, 1+CH4, a polarized Si+⋯CH4 contact of 2.289 Å as well as series of (H3)CH⋯O/CPh hydrogen bonds enforce spatial CH4 fixation (the molecule obeys C3-symmetry) and slight activation. A trigonal-pyramidal Si-CHeq3-Hax local geometry is thereby approached with Hax-C-Heq angles decreased to 103.7°. All attempts to replace the Lews acidic -BPh2 fragments in 1 with basic -PR2 (R = Ph, tBu) fragments indeed increased intra-molecular hydrogen bonding between host molecule and CH4, and thus caused stronger activation of the latter, however ultimately resulted in the formation of energetically favorable quenched structures with short P-Si contacts, making CH4 binding hard to achieve. The electronic situation of two hypothetic methane complexes, 1+CH4 and [(5-tBu2P-xan-4-)3SiCH4]+ (2+CH4), was determined by a set of calculated real-space bonding indicators (RSBIs) including the Atoms-In-Molecules (AIM), non-covalent interactions index (NCI), and electron localizability indicator (ELI-D) methods, highlighting crucial differences in the level of activation. The proposed ligand systems serve as blueprints for a more general structural design with adjustable trigonal ligand systems in which central atom, spacer fragment, and functional peri-partner can be varied to facilitate different chemical tasks.
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Affiliation(s)
- Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany.
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359, Bremen, Germany
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14
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Battistella B, Iffland-Mühlhaus L, Schütze M, Cula B, Kuhlmann U, Dau H, Hildebrandt P, Lohmiller T, Mebs S, Apfel UP, Ray K. Evidence of Sulfur Non-Innocence in [Co II (dithiacyclam)] 2+ -Mediated Catalytic Oxygen Reduction Reactions. Angew Chem Int Ed Engl 2023; 62:e202214074. [PMID: 36378951 PMCID: PMC10108118 DOI: 10.1002/anie.202214074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 11/16/2022]
Abstract
In many metalloenzymes, sulfur-containing ligands participate in catalytic processes, mainly via the involvement in electron transfer reactions. In a biomimetic approach, we now demonstrate the implication of S-ligation in cobalt mediated oxygen reduction reactions (ORR). A comparative study between the catalytic ORR capabilities of the four-nitrogen bound [Co(cyclam)]2+ (1; cyclam=1,5,8,11-tetraaza-cyclotetradecane) and the S-containing analog [Co(S2 N2 -cyclam)]2+ (2; S2 N2 -cyclam=1,8-dithia-5,11-diaza-cyclotetradecane) reveals improved catalytic performance once the chalcogen is introduced in the Co coordination sphere. Trapping and characterization of the intermediates formed upon dioxygen activation at the CoII centers in 1 and 2 point to the involvement of sulfur in the O2 reduction process as the key for the improved catalytic ORR capabilities of 2.
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Affiliation(s)
- Beatrice Battistella
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Linda Iffland-Mühlhaus
- Faculty of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstraße 150, 44780, Bochum, Germany
| | - Maximillian Schütze
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Beatrice Cula
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Uwe Kuhlmann
- Institut für Chemie, Fakultät II, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Holger Dau
- Institut für Physik, Freie Universität zu Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Peter Hildebrandt
- Institut für Chemie, Fakultät II, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Thomas Lohmiller
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany.,EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489, Berlin, Germany
| | - Stefan Mebs
- Institut für Physik, Freie Universität zu Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Ulf-Peter Apfel
- Faculty of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstraße 150, 44780, Bochum, Germany.,Department for Electrosynthesis, Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, Osterfelder Str. 3, 46047, Oberhausen, Germany
| | - Kallol Ray
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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15
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Battistella B, Lohmiller T, Cula B, Hildebrandt P, Kuhlmann U, Dau H, Mebs S, Ray K. A Thiolate‐Bound Dimanganese Cluster as a Structural and Functional Model for Class Ib Ribonucleotide Reductases. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202217076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Beatrice Battistella
- Humboldt University of Berlin: Humboldt-Universitat zu Berlin Department of Chemistry GERMANY
| | - Thomas Lohmiller
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin Department of Chemistry GERMANY
| | - Beatrice Cula
- Humboldt University of Berlin: Humboldt-Universitat zu Berlin Department of Chemistry GERMANY
| | - Peter Hildebrandt
- TU Berlin: Technische Universitat Berlin Institut für Chemie GERMANY
| | - Uwe Kuhlmann
- TU Berlin University: Technische Universitat Berlin Institut für Chemie GERMANY
| | - Holger Dau
- FU Berlin: Freie Universitat Berlin Institut für Physik GERMANY
| | - Stefan Mebs
- FU Berlin: Freie Universitat Berlin Institut für Physik GERMANY
| | - Kallol Ray
- Humboldt university Institute of chemistry Brook-taylor strasse 2 12489 Berlin GERMANY
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16
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Kass D, Yao S, Krause K, Corona T, Richter L, Braun T, Mebs S, Haumann M, Dau H, Lohmiller T, Limberg C, Drieß M, Ray K. Spectroscopic Properties of a Biologically Relevant [Fe2(μ‐O)2] Diamond Core Motif with a Short Iron‐Iron distance. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Dustin Kass
- Humboldt University of Berlin: Humboldt-Universitat zu Berlin Chemistry GERMANY
| | - Shenglai Yao
- Technical University of Berlin: Technische Universitat Berlin Chemistry GERMANY
| | | | - Teresa Corona
- HU Berlin: Humboldt-Universitat zu Berlin Chemistry GERMANY
| | - Liza Richter
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin chemistry GERMANY
| | - Thomas Braun
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin chemistry GERMANY
| | - Stefan Mebs
- Freie Universität Berlin: Freie Universitat Berlin Institut für Physik GERMANY
| | - Michael Haumann
- Freie Universität Berlin: Freie Universitat Berlin Institut für Physik GERMANY
| | - Holger Dau
- Freie Universität Berlin: Freie Universitat Berlin Institut für Physik GERMANY
| | | | | | - Matthias Drieß
- Technical University of Berlin: Technische Universitat Berlin chemistry GERMANY
| | - Kallol Ray
- Humboldt university Institute of chemistry Brook-taylor strasse 2 12489 Berlin GERMANY
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17
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El-Nagar GA, Yang F, Stojkovikj S, Mebs S, Gupta S, Ahmet IY, Dau H, Mayer MT. Comparative Spectroscopic Study Revealing Why the CO 2 Electroreduction Selectivity Switches from CO to HCOO - at Cu-Sn- and Cu-In-Based Catalysts. ACS Catal 2022; 12:15576-15589. [PMID: 36590316 PMCID: PMC9793466 DOI: 10.1021/acscatal.2c04419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/17/2022] [Indexed: 12/12/2022]
Abstract
To address the challenge of selectivity toward single products in Cu-catalyzed electrochemical CO2 reduction, one strategy is to incorporate a second metal with the goal of tuning catalytic activity via synergy effects. In particular, catalysts based on Cu modified with post-transition metals (Sn or In) are known to reduce CO2 selectively to either CO or HCOO- depending on their composition. However, it remains unclear exactly which factors induce this switch in reaction pathways and whether these two related bimetal combinations follow similar general structure-activity trends. To investigate these questions systematically, Cu-In and Cu-Sn bimetallic catalysts were synthesized across a range of composition ratios and studied in detail. Compositional and morphological control was achieved via a simple electrochemical synthesis approach. A combination of operando and quasi-in situ spectroscopic techniques, including X-ray photoelectron, X-ray absorption, and Raman spectroscopy, was used to observe the dynamic behaviors of the catalysts' surface structure, composition, speciation, and local environment during CO2 electrolysis. The two systems exhibited similar selectivity dependency on their surface composition. Cu-rich catalysts produce mainly CO, while Cu-poor catalysts were found to mainly produce HCOO-. Despite these similarities, the speciation of Sn and In at the surface differed from each other and was found to be strongly dependent on the applied potential and the catalyst composition. For Cu-rich compositions optimized for CO production (Cu85In15 and Cu85Sn15), indium was present predominantly in the reduced metallic form (In0), whereas tin mainly existed as an oxidized species (Sn2/4+). Meanwhile, for the HCOO--selective compositions (Cu25In75 and Cu40Sn60), the indium exclusively exhibited In0 regardless of the applied potential, while the tin was reduced to metallic (Sn0) only at the most negative applied potential, which corresponds to the best HCOO- selectivity. Furthermore, while Cu40Sn60 enhances HCOO- selectivity by inhibiting H2 evolution, Cu25In75 improves the HCOO- selectivity at the expense of CO production. Due to these differences, we contend that identical mechanisms cannot be used to explain the behavior of these two bimetallic systems (Cu-In and Cu-Sn). Operando surface-enhanced Raman spectroscopy measurements provide direct evidence of the local alkalization and its impact on the dynamic transformation of oxidized Cu surface species (Cu2O/CuO) into a mixture of Cu(OH)2 and basic Cu carbonates [Cux(OH)y(CO3)y] rather than metallic Cu under CO2 electrolysis. This study provides unique insights into the origin of the switch in selectivity between CO and HCOO- pathways at Cu bimetallic catalysts and the nature of surface-active sites and key intermediates for both pathways.
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Affiliation(s)
- Gumaa A. El-Nagar
- Young
Investigator Group Electrochemical Conversion of CO2, Helmholtz-Zentrum Berlin für Materialien und
Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany,Department
of Chemistry, Faculty of Science, Cairo
University, Giza 12613, Egypt,
| | - Fan Yang
- Department
of Physics, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
| | - Sasho Stojkovikj
- Young
Investigator Group Electrochemical Conversion of CO2, Helmholtz-Zentrum Berlin für Materialien und
Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany,Institut
für Chemie und Biochemie, Freie Universität
Berlin, Arnimallee 22, Berlin D-14195, Germany
| | - Stefan Mebs
- Department
of Physics, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
| | - Siddharth Gupta
- Young
Investigator Group Electrochemical Conversion of CO2, Helmholtz-Zentrum Berlin für Materialien und
Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany,Institut
für Chemie und Biochemie, Freie Universität
Berlin, Arnimallee 22, Berlin D-14195, Germany
| | - Ibbi Y. Ahmet
- Institute
for Solar Fuels, Helmholtz-Zentrum Berlin
für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany
| | - Holger Dau
- Department
of Physics, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
| | - Matthew T. Mayer
- Young
Investigator Group Electrochemical Conversion of CO2, Helmholtz-Zentrum Berlin für Materialien und
Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany,Institut
für Chemie und Biochemie, Freie Universität
Berlin, Arnimallee 22, Berlin D-14195, Germany,
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18
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Hausmann JN, Mebs S, Dau H, Driess M, Menezes PW. Oxygen Evolution Activity of Amorphous Cobalt Oxyhydroxides: Interconnecting Precatalyst Reconstruction, Long-Range Order, Buffer-Binding, Morphology, Mass Transport, and Operation Temperature. Adv Mater 2022; 34:e2207494. [PMID: 36189873 DOI: 10.1002/adma.202207494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Nanocrystalline or amorphous cobalt oxyhydroxides (CoCat) are promising electrocatalysts for the oxygen evolution reaction (OER). While having the same short-range order, CoCat phases possess different electrocatalytic properties. This phenomenon is not conclusively understood, as multiple interdependent parameters affect the OER activity simultaneously. Herein, a layered cobalt borophosphate precatalyst, Co(H2 O)2 [B2 P2 O8 (OH)2 ]·H2 O, is fully reconstructed into two different CoCat phases. In contrast to previous reports, this reconstruction is not initiated at the surface but at the electrode substrate to catalyst interface. Ex situ and in situ investigations of the two borophosphate derived CoCats, as well as the prominent CoPi and CoBi identify differences in the Tafel slope/range, buffer binding and content, long-range order, number of accessible edge sites, redox activity, and morphology. Considering and interconnecting these aspects together with proton mass-transport limitations, a comprehensive picture is provided explaining the different OER activities. The most decisive factors are the buffers used for reconstruction, the number of edge sites that are not inhibited by irreversibly bonded buffers, and the morphology. With this acquired knowledge, an optimized OER system is realized operating in near-neutral potassium borate medium at 1.62 ± 0.03 VRHE yielding 250 mA cm-2 at 65 °C for 1 month without degrading performance.
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Affiliation(s)
- J Niklas Hausmann
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
| | - Stefan Mebs
- Department of Physics, Free University of Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Holger Dau
- Department of Physics, Free University of Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Matthias Driess
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
| | - Prashanth W Menezes
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany
- Material Chemistry Group for Thin Film Catalysis-CatLab, Helmholtz-Center Berlin for Materials and Energy, Albert-Einstein-Str. 15, 12489, Berlin, Germany
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19
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Battistella B, Iffland-Mühlhaus L, Schütze M, Cula B, Kuhlmann U, Dau H, Hildebrandt P, Lohmiller T, Mebs S, Apfel UP, Ray K. Evidence of Sulfur Non‐Innocence in [CoII(dithiacyclam)]2+‐Mediated Catalytic Oxygen Reduction Reactions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202214074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Beatrice Battistella
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin Chemistry GERMANY
| | - Linda Iffland-Mühlhaus
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Faculty of Chemistry and Biochemistry GERMANY
| | - Maximillian Schütze
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin Chemistry GERMANY
| | - Beatrice Cula
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin Chemistry GERMANY
| | - Uwe Kuhlmann
- Technical University of Berlin: Technische Universitat Berlin Chemistry GERMANY
| | - Holger Dau
- FU Berlin: Freie Universitat Berlin Physics GERMANY
| | | | - Thomas Lohmiller
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin Chemistry GERMANY
| | - Stefan Mebs
- FU Berlin: Freie Universitat Berlin Physics GERMANY
| | - Ulf-Peter Apfel
- Ruhr University Bochum: Ruhr-Universitat Bochum Faculty of Chemistry and Biochemistry GERMANY
| | - Kallol Ray
- Humboldt university Institute of chemistry Brook-taylor strasse 2 12489 Berlin GERMANY
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20
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Mebs S, Beckmann J. In silico capture of noble gas atoms with a light atom molecule. Phys Chem Chem Phys 2022; 24:20968-20979. [PMID: 36053150 DOI: 10.1039/d2cp02517e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Noble gas atoms (Ng = He, Ne, Ar, and Kr) can be captured in silico with a light atom molecule containing only C, H, Si, O, and B atoms. Extensive density functional theory (DFT) calculations on series of peri-substituted scaffolds indicate that confined spaces (voids) capable to energy efficiently encapsulate and bind Ng atoms are accessible by design of a tripodal peri-substituted ligand, namely, [(5-Ph2B-xan-4-)3Si]H (xan = xanthene) comprising (after hydride abstraction) four Lewis acidic sites within the cationic structure [(5-Ph2B-xan-4-)3Si]+. The host (ligand system) thereby provides an adoptive environment for the guest (Ng atom) to accommodate for its particular size. Whereas considerable chemical interactions are detectable between the ligand system and the heavier Ng atoms Kr and Ar in the host guest complex [(5-Ph2B-xan-4-)3Si·Ng]+, the lighter Ng atoms Ne and He are rather tolerated by the ligand system instead of being chemically bound to it, nicely highlighting the gradual onset of (weak) chemical bonding along the series He to Kr. A variety of real-space bonding indicators (RSBIs) derived from the calculated electron and pair densities provides valuable insight to the situation of an "isolated atom in a molecule" in case of He, uncovering its size and shape, whereas minute charge rearrangements caused by polarization of the outer electron shell of the larger Ng atoms results in formation of polarized interactions for Ar and Kr with non-negligible covalent bond contributions for Kr. The present study shows that noble gas atoms can be trapped by small light-atom molecules without the forceful conditions necessary using cage structures such as fullerenes, boranes and related compounds or by using super-electrophilic sites like [B12(CN)11]- if the chelating effect of several Lewis acidic sites within one molecule is employed.
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Affiliation(s)
- Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany.
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
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21
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Mebs S, Beckmann J. In silico activation of dinitrogen with a light atom molecule. Phys Chem Chem Phys 2022; 24:20953-20967. [PMID: 35993454 DOI: 10.1039/d2cp02516g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The NN triple bond can be cleaved in silico with a light atom molecule containing only the earth abundant elements C, H, Si, and P. Extensive density functional theory (DFT) computations on various classes of peri-substituted scaffolds containing Lewis acidic and basic sites in the framework of frustrated Lewis pairs (FLP) indicate that the presence of two silyl cations and two P atoms in a flexible but not too flexible arrangement is essential for energy efficient N2-activation. The non-bonding lone-pair electrons of the P atoms thereby serve as donors towards N2, whereas the lone-pairs of N2 donate into the silyl cations. Newly formed lone-pair basins in the N2-adducts balance surplus charge. Thereby, the N-N bond distance is increased by astonishing 0.3 Å, from 1.1 Å in N2 gas to 1.4 Å in the adduct, which makes this bond prone to subsequent addition of hydride ions and protonation, forming two secondary amine sites in the process and eventually breaking the NN triple bond. Potential formation of dead-end states, in which the dications ("active states") aversively form a Lewis acid (LA)-Lewis base (LB) bond, or in which the LA and LB sites are too far away from each other to be able to capture N2, are problematic but might be circumvented by proper choice of spacer molecules, such as acenaphthalene or biphenylene, and the ligands attached to the LA and LB atoms, such as phenyl or mesityl, and by purging the reaction solutions with gaseous N2 in the initial reaction steps. Charge redistributions via N2-activation and splitting were monitored by a variety of real-space bonding indicators (RSBIs) derived from the calculated electron and electron pair densities, which provided valuable insight into the bonding situation within the different reaction steps.
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Affiliation(s)
- Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany.
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
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22
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Duvinage D, Malaspina L, Grabowsky S, Mebs S, Beckmann J. Lewis Superacidic Divalent Bis(m‐terphenyl)element Cations [(2,6‐Mes2C6H3)2E]+ of Group 13 Revisited and Extended (E = B, Al, Ga, In, Tl)r. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | - Stefan Mebs
- Universitatsbibliothek der Freien Universitat Berlin: Freie Universitat Berlin Universitatsbibliothek Physik GERMANY
| | - Jens Beckmann
- Universität Bremen Institut fuer Biologie und Chemie Leobener Str. 28359 Bremen GERMANY
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23
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Komorr P, Olaru M, Hupf E, Mebs S, Beckmann J. Donor Acceptor Complexes between the Chalcogen Fluorides SF
2
, SeF
2
, SeF
4
and TeF
4
and an N‐Heterocyclic Carbene. Chemistry 2022; 28:e202201023. [PMID: 35587690 PMCID: PMC9544779 DOI: 10.1002/chem.202201023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Pascal Komorr
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Marian Olaru
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
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24
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Duvinage D, Janssen M, Lork E, Grützmacher H, Mebs S, Beckmann J. Kinetic Stabilization of Heavier Bis(m‐terphenyl)pnictogen Phosphaethynolates. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | | | | | | | - Jens Beckmann
- Universität Bremen Institut fuer Biologie und Chemie Leobener Str. 28359 Bremen GERMANY
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25
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Duvinage D, Puylaert P, Wieduwilt EK, Malaspina LA, Edwards AJ, Lork E, Mebs S, Hupf E, Grabowsky S, Beckmann J. Nickel and Palladium Complexes of a PP(O)P Pincer Ligand Based upon a peri-Substituted Acenaphthyl Scaffold and a Secondary Phosphine Oxide. Inorg Chem 2022; 61:8406-8418. [PMID: 35609007 DOI: 10.1021/acs.inorgchem.1c03266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A PP(O)P pincer ligand based upon a peri-substituted acenaphthyl (Ace) scaffold and a secondary phosphine oxide, (5-Ph2P-Ace-6-)2P(O)H, was prepared and fully characterized including a neutron diffraction study. The reaction with [Ni(H2O)6]Cl2 and PdCl2 produced ionic metal(II) complexes [κ3-P,P',P''((5-Ph2P-Ace-6-)2P(OH))MCl]Cl, which upon addition of Et3N gave rise to zwitterionic metal(II) complexes κ3-P,P',P''((5-Ph2P-Ace-6-)2P(O))MCl (M = Ni, Pd). The reaction with Ni(COD)2 (COD = cyclooctadiene) provided the η3-cyclooctenyl Ni(II) complex κ3-P,P',P''((5-Ph2P-Ace-6-)2P(O))Ni(η3-C8H13). A detailed complementary bonding analysis of the P-H, P-O, and P-M interactions was carried out (M = Ni, Pd).
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Affiliation(s)
- Daniel Duvinage
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany
| | - Pim Puylaert
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany
| | - Erna K Wieduwilt
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany.,CNRS, Laboratoire de Physique et Chimie Theoriques (LPCT), Université de Lorraine, 1 Boulevard Arago, 57078 Metz, France
| | - Lorraine A Malaspina
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany.,Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Alison J Edwards
- Australian Nuclear Science and Technology Organisation, Australian Centre for Neutron Scattering, New Illawarra Road, Lucas Heights, Sydney 2234, Australia
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany
| | - Simon Grabowsky
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany.,Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 3 & 7, 28359 Bremen, Germany
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26
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Duvinage D, Janssen M, Lork E, Grützmacher H, Mebs S, Beckmann J. Heavier Bis(m-terphenyl)element phosphaethynolates of Group 13. Dalton Trans 2022; 51:7622-7629. [DOI: 10.1039/d2dt00907b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and reactivity of the heavier group 13 phosphaketene complexes (2,6-Mes2C6H3)2EPCO (1, E = Ga; 2, E = In) were reported. The reaction of 1 and 2 with 1,2,3,4-tetramethylimidazolin-2-ylidene,...
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27
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Battistella B, Warm K, Cula B, Lu B, Hildebrandt P, Kuhlmann U, Dau H, Mebs S, Ray K. The influence of secondary interactions on the [Ni(O 2)] + mediated aldehyde oxidation reactions. J Inorg Biochem 2021; 227:111668. [PMID: 34923388 DOI: 10.1016/j.jinorgbio.2021.111668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 11/14/2021] [Accepted: 11/14/2021] [Indexed: 11/30/2022]
Abstract
A rate enhancement of one to two orders of magnitude can be obtained in the aldehyde deformylation reactions by replacing the -N(CH3) groups of [NiIII(O2)(Me4[12]aneN4)]+ (Me4[12]aneN4 = 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane) and [NiIII(O2)(Me4[13]aneN4)]+ (Me4[13]aneN4 = 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclotridecane) complexes by -NH in [NiIII(O2)([12]aneN4)]+ (2; [12]aneN4 = 1,4,7,10-tetraazacyclododecane) and [NiIII(O2)([13]aneN4)]+ (4; [13]aneN4 = 1,4,7,10-tetraazacyclotridecane). Based on detailed spectroscopic, reaction-kinetics and theoretical investigations, the higher reactivities of 2 and 4 are attributed to the changes in the secondary-sphere interactions between the [NiIII(O2)]+ and [12]aneN4 or [13]aneN4 moieties, which open up an alternative electrophilic pathway for the aldehyde oxidation reaction. Identification of primary kinetic isotope effects on the reactivity and stability of 2 when the -NH groups of the [12]aneN4 ligand are deuterated may also suggest the presence of secondary interaction between the -NH groups of [12]aneN4 and [NiIII(O2)]+ moieties, although, such interactions are not obvious in the DFT calculated optimized structure at the employed level of theory.
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Affiliation(s)
- Beatrice Battistella
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Katrin Warm
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Beatrice Cula
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Bernd Lu
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Peter Hildebrandt
- Technische Universität Berlin, Institut für Chemie, Sekretariat PC 14, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Uwe Kuhlmann
- Technische Universität Berlin, Institut für Chemie, Sekretariat PC 14, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Holger Dau
- Freie Universität zu Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
| | - Stefan Mebs
- Freie Universität zu Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
| | - Kallol Ray
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Straße 2, 12489 Berlin, Germany.
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28
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Furan S, Molkenthin M, Winkels K, Lork E, Mebs S, Hupf E, Beckmann J. Tris(6-diphenylphosphinoacenaphth-5-yl)gallium: Z-Type Ligand and Transmetalation Reagent. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sinas Furan
- Institut für Anorganische Chemie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Martin Molkenthin
- Institut für Anorganische Chemie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Konrad Winkels
- Institut für Anorganische Chemie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Enno Lork
- Institut für Anorganische Chemie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
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29
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Hejda M, Duvinage D, Lork E, Lyčka A, Černošek Z, Macháček J, Makarov S, Ketkov S, Mebs S, Dostál L, Beckmann J. Lewis Superacidic Tellurenyl Cation-Induced Electrophilic Activation of an Inert Carborane. Chemistry 2021; 27:14577-14581. [PMID: 34495561 PMCID: PMC8596995 DOI: 10.1002/chem.202103181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Indexed: 11/09/2022]
Abstract
The aryltellurenyl cation [2-(tBuNCH)C6 H4 Te]+ , a Lewis super acid, and the weakly coordinating carborane anion [CB11 H12 ]- , an extremely weak Brønsted acid (pKa =131.0 in MeCN), form an isolable ion pair complex [2-(tBuNCH)C6 H4 Te][CB11 H12 ], in which the Brønsted acidity (pKa 7.4 in MeCN) of the formally hydridic B-H bonds is dramatically increased by more than 120 orders of magnitude. The electrophilic activation of B-H bonds in the carborane moiety gives rise to a proton transfer from boron to nitrogen at slightly elevated temperatures, as rationalized by the isolation of a mixture of the zwitterionic isomers 12- and 7-[2-(tBuN{H}CH)C6 H4 Te(CB11 H11 )] in ratios ranging from 62 : 38 to 80 : 20.
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Affiliation(s)
- Martin Hejda
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
- Department of General and Inorganic ChemistryUniversity of PardubiceStudentská 573532 10PardubiceCzech Republic
| | - Daniel Duvinage
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Enno Lork
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Antonín Lyčka
- Faculty of ScienceUniversity of Hradec KrálovéRokitanského 62500 03Hradec Králové 3Czech Republic
| | - Zdeněk Černošek
- Department of General and Inorganic ChemistryUniversity of PardubiceStudentská 573532 10PardubiceCzech Republic
| | - Jan Macháček
- Institute of Inorganic ChemistryCzech Academy of Sciences250 68Řež near PragueCzech Republic
| | - Sergey Makarov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS49 Tropinin St.603950Nizhny NovgorodRussian Federation
| | - Sergey Ketkov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS49 Tropinin St.603950Nizhny NovgorodRussian Federation
| | - Stefan Mebs
- Institut für ExperimentalphysikFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Libor Dostál
- Department of General and Inorganic ChemistryUniversity of PardubiceStudentská 573532 10PardubiceCzech Republic
| | - Jens Beckmann
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
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30
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Hejda M, Duvinage D, Lork E, Lyčka A, Černošek Z, Macháček J, Makarov S, Ketkov S, Mebs S, Dostál L, Beckmann J. Front Cover: Lewis Superacidic Tellurenyl Cation‐Induced Electrophilic Activation of an Inert Carborane (Chem. Eur. J. 59/2021). Chemistry 2021. [DOI: 10.1002/chem.202103551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Martin Hejda
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
- Department of General and Inorganic Chemistry University of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Daniel Duvinage
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Antonín Lyčka
- Faculty of Science University of Hradec Králové Rokitanského 62 500 03 Hradec Králové 3 Czech Republic
| | - Zdeněk Černošek
- Department of General and Inorganic Chemistry University of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Jan Macháček
- Institute of Inorganic Chemistry Czech Academy of Sciences 250 68 Řež near Prague Czech Republic
| | - Sergey Makarov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS 49 Tropinin St. 603950 Nizhny Novgorod Russian Federation
| | - Sergey Ketkov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS 49 Tropinin St. 603950 Nizhny Novgorod Russian Federation
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Libor Dostál
- Department of General and Inorganic Chemistry University of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
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31
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Warm K, Tripodi G, Andris E, Mebs S, Kuhlmann U, Dau H, Hildebrandt P, Roithová J, Ray K. Spektroskopische Charakterisierung eines reaktiven [Cu
2
(μ‐OH)
2
]
2+
Intermediates in Cu/TEMPO‐katalysierten aeroben Alkoholoxidationen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Katrin Warm
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | | | - Erik Andris
- Radboud University Heyendaalseweg 135 6525 AJ Nijmegen Niederlande
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Stefan Mebs
- Institut für Physik Freie Universität Berlin Arnimallee 14 14195 Berlin Deutschland
| | - Uwe Kuhlmann
- Institut für Chemie, Fakultät II Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Holger Dau
- Institut für Physik Freie Universität Berlin Arnimallee 14 14195 Berlin Deutschland
| | - Peter Hildebrandt
- Institut für Chemie, Fakultät II Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Jana Roithová
- Radboud University Heyendaalseweg 135 6525 AJ Nijmegen Niederlande
| | - Kallol Ray
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Deutschland
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32
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Warm K, Tripodi G, Andris E, Mebs S, Kuhlmann U, Dau H, Hildebrandt P, Roithová J, Ray K. Spectroscopic Characterization of a Reactive [Cu 2 (μ-OH) 2 ] 2+ Intermediate in Cu/TEMPO Catalyzed Aerobic Alcohol Oxidation Reaction. Angew Chem Int Ed Engl 2021; 60:23018-23024. [PMID: 34309168 PMCID: PMC8518518 DOI: 10.1002/anie.202108442] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/16/2021] [Indexed: 12/23/2022]
Abstract
CuI/TEMPO (TEMPO=2,2,6,6‐tetramethylpiperidinyloxyl) catalyst systems are versatile catalysts for aerobic alcohol oxidation reactions to selectively yield aldehydes. However, several aspects of the mechanism are yet unresolved, mainly because of the lack of identification of any reactive intermediates. Herein, we report the synthesis and characterization of a dinuclear [L12Cu2]2+ complex 1, which in presence of TEMPO can couple the catalytic 4 H+/4 e− reduction of O2 to water to the oxidation of benzylic and aliphatic alcohols. The mechanisms of the O2‐reduction and alcohol oxidation reactions have been clarified by the spectroscopic detection of the reactive intermediates in the gas and condensed phases, as well as by kinetic studies on each step in the catalytic cycles. Bis(μ‐oxo)dicopper(III) (2) and bis(μ‐hydroxo)dicopper(II) species 3 are shown as viable reactants in oxidation catalysis. The present study provides deep mechanistic insight into the aerobic oxidation of alcohols that should serve as a valuable foundation for ongoing efforts dedicated towards the understanding of transition‐metal catalysts involving redox‐active organic cocatalysts.
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Affiliation(s)
- Katrin Warm
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Guilherme Tripodi
- Radboud University, Heyendaalseweg 135, 6525, AJ, Nijmegen, Netherlands
| | - Erik Andris
- Radboud University, Heyendaalseweg 135, 6525, AJ, Nijmegen, Netherlands.,Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic
| | - Stefan Mebs
- Institut für Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Uwe Kuhlmann
- Institut für Chemie, Fakultät II, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Holger Dau
- Institut für Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Peter Hildebrandt
- Institut für Chemie, Fakultät II, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Jana Roithová
- Radboud University, Heyendaalseweg 135, 6525, AJ, Nijmegen, Netherlands
| | - Kallol Ray
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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33
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Malik DD, Chandra A, Seo MS, Lee YM, Farquhar ER, Mebs S, Dau H, Ray K, Nam W. Formation of cobalt-oxygen intermediates by dioxygen activation at a mononuclear nonheme cobalt(ii) center. Dalton Trans 2021; 50:11889-11898. [PMID: 34373886 PMCID: PMC8499697 DOI: 10.1039/d1dt01996a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mononuclear nonheme cobalt(ii) complex, [(TMG3tren)CoII(OTf)](OTf) (1), activates dioxygen in the presence of hydrogen atom donor substrates, such as tetrahydrofuran and cyclohexene, resulting in the generation of a cobalt(ii)-alkylperoxide intermediate (2), which then converts to the previously reported cobalt(iv)-oxo complex, [(TMG3tren)CoIV(O)]2+-(Sc(OTf)3)n (3), in >90% yield upon addition of a redox-inactive metal ion, Sc(OTf)3. Intermediates 2 and 3 represent the cobalt analogues of the proposed iron(ii)-alkylperoxide precursor that converts to an iron(iv)-oxo intermediate via O-O bond heterolysis in pterin-dependent nonheme iron oxygenases. In reactivity studies, 2 shows an amphoteric reactivity in electrophilic and nucleophilic reactions, whereas 3 is an electrophilic oxidant. To the best of our knowledge, the present study reports the first example showing the generation of cobalt-oxygen intermediates by activating dioxygen at a cobalt(ii) center and the reactivities of the cobalt-oxygen intermediates in oxidation reaction.
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Affiliation(s)
- Deesha D Malik
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.
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34
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Olaru M, Mebs S, Beckmann J. Kationische Carben‐Analoga: Donorfreie Phosphenium‐ und Arsenium‐Ionen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marian Olaru
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
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35
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Abstract
Carbenes and their analogues have constantly enthralled chemists with their intriguing reactivity of ambiphilic character stemming from their electronic structures. Phosphenium and arsenium ions are fiercely reactive cationic species, the stabilization of which has been so far achieved in the condensed phase by dispersing the positive charge through electromeric conjugation with at least one electron-rich substituent (frequently amido groups). Although observed in the gas phase, the isolation of dicoordinate phosphenium and arsenium ions lacking such stabilizing ligands has eluded chemists for decades. Herein we show that by judicious choice of aromatic substituents, dicoordinate, donor-free, Lewis-superacidic phosphenium and arsenium ions can be kinetically stabilized. They feature singlet electronic ground states possessing a vacant p-orbital and an electron lone pair with predominantly s-character.
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Affiliation(s)
- Marian Olaru
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Stefan Mebs
- Institut für ExperimentalphysikFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Jens Beckmann
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
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36
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Reckziegel A, Kour M, Battistella B, Mebs S, Beuthert K, Berger R, Werncke CG. High-Spin Imido Cobalt Complexes with Imidyl Radical Character*. Angew Chem Int Ed Engl 2021; 60:15376-15380. [PMID: 33977634 PMCID: PMC8362137 DOI: 10.1002/anie.202103841] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/10/2021] [Indexed: 01/21/2023]
Abstract
We report on the synthesis of a variety of trigonal imido cobalt complexes [Co(NAryl)L2 ]- , (L=N(Dipp)SiMe3 ), Dipp=2,6-diisopropylphenyl) with very long Co-NAryl bonds of around 1.75 Å. Their electronic structure was interrogated using a variety of physical and spectroscopic methods such as EPR or X-Ray absorption spectroscopy which leads to their description as highly unusual imidyl cobalt complexes. Computational analyses corroborate these findings and further reveal that the high-spin state is responsible for the imidyl character. Exchange of the Dipp substituent on the imide by the smaller mesityl function (2,4,6-trimethylphenyl) effectuates the unexpected Me3 Si shift from the ancillary ligand set to the imidyl nitrogen, revealing a highly reactive, nucleophilic character of the imidyl unit.
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Affiliation(s)
- Alexander Reckziegel
- Department of ChemistryPhilipps-University MarburgHans-Meerwein-Strasse 435032MarburgGermany
| | - Manjinder Kour
- Department of ChemistryPhilipps-University MarburgHans-Meerwein-Strasse 435032MarburgGermany
| | - Beatrice Battistella
- Institute of ChemistryHumboldt-Universität zu BerlinBrook-Taylor-Strasse 212489BerlinGermany
| | - Stefan Mebs
- Department of PhysicsFreie Universität zu BerlinArnimallee 1414195BerlinGermany
| | - Katrin Beuthert
- Department of ChemistryPhilipps-University MarburgHans-Meerwein-Strasse 435032MarburgGermany
| | - Robert Berger
- Department of ChemistryPhilipps-University MarburgHans-Meerwein-Strasse 435032MarburgGermany
| | - C. Gunnar Werncke
- Department of ChemistryPhilipps-University MarburgHans-Meerwein-Strasse 435032MarburgGermany
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37
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Reckziegel A, Kour M, Battistella B, Mebs S, Beuthert K, Berger R, Werncke CG. High‐Spin‐Imidocobaltkomplexe mit Imidylradikalcharakter**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103841] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander Reckziegel
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Straße 4 35032 Marburg Deutschland
| | - Manjinder Kour
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Straße 4 35032 Marburg Deutschland
| | - Beatrice Battistella
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Stefan Mebs
- Fachbereich Physik Freie Universität zu Berlin Arnimallee 14 14195 Berlin Deutschland
| | - Katrin Beuthert
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Straße 4 35032 Marburg Deutschland
| | - Robert Berger
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Straße 4 35032 Marburg Deutschland
| | - C. Gunnar Werncke
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Straße 4 35032 Marburg Deutschland
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38
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Hausmann JN, Beltrán-Suito R, Mebs S, Hlukhyy V, Fässler TF, Dau H, Driess M, Menezes PW. Evolving Highly Active Oxidic Iron(III) Phase from Corrosion of Intermetallic Iron Silicide to Master Efficient Electrocatalytic Water Oxidation and Selective Oxygenation of 5-Hydroxymethylfurfural. Adv Mater 2021; 33:e2008823. [PMID: 34048605 DOI: 10.1002/adma.202008823] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 04/01/2021] [Indexed: 06/12/2023]
Abstract
In a green energy economy, electrocatalysis is essential for chemical energy conversion and to produce value added chemicals from regenerative resources. To be widely applicable, an electrocatalyst should comprise the Earth's crust's most abundant elements. The most abundant 3d metal, iron, with its multiple accessible redox states has been manifold applied in chemocatalytic processes. However, due to the low conductivity of FeIII Ox Hy phases, its applicability for targeted electrocatalytic oxidation reactions such as water oxidation is still limited. Herein, it is shown that iron incorporated in conductive intermetallic iron silicide (FeSi) can be employed to meet this challenge. In contrast to silicon-poor iron-silicon alloys, intermetallic FeSi possesses an ordered structure with a peculiar bonding situation including covalent and ionic contributions together with conducting electrons. Using in situ X-ray absorption and Raman spectroscopy, it could be demonstrated that, under the applied corrosive alkaline conditions, the FeSi partly forms a unique, oxidic iron(III) phase consisting of edge and corner sharing [FeO6 ] octahedra together with oxidized silicon species. This phase is capable of driving the oxyge evolution reaction (OER) at high efficiency under ambient and industrially relevant conditions (500 mA cm-2 at 1.50 ± 0.025 VRHE and 65 °C) and to selectively oxygenate 5-hydroxymethylfurfural (HMF).
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Affiliation(s)
- J Niklas Hausmann
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135. Sekr. C2, 10623, Berlin, Germany
| | - Rodrigo Beltrán-Suito
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135. Sekr. C2, 10623, Berlin, Germany
| | - Stefan Mebs
- Department of Physics, Free University of Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Viktor Hlukhyy
- Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Thomas F Fässler
- Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Holger Dau
- Department of Physics, Free University of Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Matthias Driess
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135. Sekr. C2, 10623, Berlin, Germany
| | - Prashanth W Menezes
- Department of Chemistry: Metalorganics and Inorganic Materials, Technical University of Berlin, Straße des 17 Juni 135. Sekr. C2, 10623, Berlin, Germany
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Holsten S, Malaspina LA, Kleemiss F, Mebs S, Hupf E, Grabowsky S, Beckmann J. Different Reactivities of (5-Ph2P-Ace-6-)2MeSiH toward the Rhodium(I) Chlorides [(C2H4)2RhCl]2 and [(CO)2RhCl]2. Hirshfeld Atom Refinement of a Rh–H···Si Interaction. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sebastian Holsten
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Lorraine A. Malaspina
- Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Florian Kleemiss
- Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Simon Grabowsky
- Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
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40
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Abstract
Fluorenyl cations are textbook examples of 4π electron antiaromatic five-membered ring systems. So far, they were reported only as short-lived intermediates generated under superacidic conditions or by flash photolysis. Attempts to prepare a m-terphenyl acylium cation by fluoride abstraction from a benzoyl fluoride gave rise to an isolable 9-hydroxy fluorenyl cation that formed by an intramolecular electrophilic attack at a flanking mesityl group prior to a 1,2-methyl shift and proton transfer to oxygen.
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Affiliation(s)
- Daniel Duvinage
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Stefan Mebs
- Institut für ExperimentalphysikFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Jens Beckmann
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
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41
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Furan S, Vogt M, Winkels K, Lork E, Mebs S, Hupf E, Beckmann J. (6-Diphenylphosphinoacenaphth-5-yl)indium and -nickel Compounds: Synthesis, Structure, Transmetalation, and Cross-Coupling Reactions. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sinas Furan
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Matthias Vogt
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
- Institut für Chemie. Fakultät für Naturwissenschaften II, Martin Luther Universität Halle-Wittenberg, Kurt Mothes Str. 2, 06120 Halle (Saale), Germany
| | - Konrad Winkels
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
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42
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Deutscher J, Gerschel P, Warm K, Kuhlmann U, Mebs S, Haumann M, Dau H, Hildebrandt P, Apfel UP, Ray K. A bioinspired oxoiron(IV) motif supported on a N 2S 2 macrocyclic ligand. Chem Commun (Camb) 2021; 57:2947-2950. [PMID: 33621306 DOI: 10.1039/d1cc00250c] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A mononuclear oxoiron(iv) complex 1-trans bearing two equatorial sulfur ligations is synthesized and characterized as an active-site model of the elusive sulfur-ligated FeIV[double bond, length as m-dash]O intermediates in non-heme iron oxygenases. The introduction of sulfur ligands weakens the Fe[double bond, length as m-dash]O bond and enhances the oxidative reactivity of the FeIV[double bond, length as m-dash]O unit with a diminished deuterium kinetic isotope effect, thereby providing a compelling rationale for nature's use of the cis-thiolate ligated oxoiron(iv) motif in key metabolic transformations.
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Affiliation(s)
- Jennifer Deutscher
- Institut für Chemie Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany.
| | - Philipp Gerschel
- Anorganische Chemie 1 Ruhr-Universität Bochum, Universitätsstraße 150, 44780, Bochum, Germany
| | - Katrin Warm
- Institut für Chemie Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany.
| | - Uwe Kuhlmann
- Institut für Chemie Technische, Universität Berlin, Fakultät II Straße des 17, Juni 135, 10623, Berlin, Germany
| | - Stefan Mebs
- Institut für Physik Freie, Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Michael Haumann
- Institut für Physik Freie, Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Holger Dau
- Institut für Physik Freie, Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Peter Hildebrandt
- Institut für Chemie Technische, Universität Berlin, Fakultät II Straße des 17, Juni 135, 10623, Berlin, Germany
| | - Ulf-Peter Apfel
- Anorganische Chemie 1 Ruhr-Universität Bochum, Universitätsstraße 150, 44780, Bochum, Germany and Department of Electrosynthesis, Fraunhofer UMSICHT, Osterfelder Str. 3, 46047 Oberhausen, Germany
| | - Kallol Ray
- Institut für Chemie Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany.
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43
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Mousazade Y, Mohammadi MR, Bagheri R, Bikas R, Chernev P, Song Z, Lis T, Siczek M, Noshiranzadeh N, Mebs S, Dau H, Zaharieva I, Najafpour MM. A synthetic manganese-calcium cluster similar to the catalyst of Photosystem II: challenges for biomimetic water oxidation. Dalton Trans 2020; 49:5597-5605. [PMID: 32282002 DOI: 10.1039/d0dt00536c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the synthesis, characterization, crystal structure, density functional theory calculations, and water-oxidizing activity of a pivalate Mn-Ca cluster. All of the manganese atoms in the cluster are Mn(iv) ions and have a distorted MnO6 octahedral geometry. Three Mn(iv) ions together with a Ca(ii) ion and four-oxido groups form a cubic Mn3CaO4 unit which is similar to the Mn3CaO4 cluster in the water-oxidizing complex of Photosystem II. Using scanning electron microscopy, transmission electron microscopy, energy dispersive spectrometry, extended X-ray absorption spectroscopy, chronoamperometry, and electrochemical methods, a conversion into nano-sized Mn-oxide is observed for the cluster in the water-oxidation reaction.
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Affiliation(s)
- Younes Mousazade
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran.
| | | | - Robabeh Bagheri
- Surface Protection Research Group, Surface Department, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 519 Zhuangshi Road, Ningbo 315201, China
| | - Rahman Bikas
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, 34148-96818, Qazvin, Iran.
| | - Petko Chernev
- Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany and Uppsala University, Department of Chemistry - Ångströmlaboratoriet, Lägerhyddsvägen 1, 75120 Uppsala, Sweden
| | - Zhenlun Song
- Surface Protection Research Group, Surface Department, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 519 Zhuangshi Road, Ningbo 315201, China
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wrocław, 14. Joliot-Curie, 50-383, Wrocław, Poland
| | - Milosz Siczek
- Faculty of Chemistry, University of Wrocław, 14. Joliot-Curie, 50-383, Wrocław, Poland
| | - Nader Noshiranzadeh
- Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran
| | - Stefan Mebs
- Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
| | - Holger Dau
- Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
| | - Ivelina Zaharieva
- Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
| | - Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran. and Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran and Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
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Abstract
[FeFe]-hydrogenases are nature's blueprint for efficient hydrogen turnover. Understanding their enzymatic mechanism may improve technological H2 fuel generation. The active-site cofactor (H-cluster) consists of a [4Fe-4S] cluster ([4Fe]H), cysteine-linked to a diiron site ([2Fe]H) carrying an azadithiolate (adt) group, terminal cyanide and carbon monoxide ligands, and a bridging carbon monoxide (μCO) in the oxidized protein (Hox). Recently, the debate on the structure of reduced H-cluster states was intensified by the assignment of new species under cryogenic conditions. We investigated temperature effects (4-280 K) in infrared (IR) and X-ray absorption spectroscopy (XAS) data of [FeFe]-hydrogenases using fit analyses and quantum-chemical calculations. IR data from our laboratory and literature sources were evaluated. At ambient temperatures, reduced H-cluster states with a bridging hydride (μH-, in Hred and Hsred) or with an additional proton at [4Fe]H (Hred') or at the distal iron of [2Fe]H (Hhyd) prevail. At cryogenic temperatures, these species are largely replaced by states that hold a μCO, lack [4Fe]H protonation, and bind an additional proton at the adt nitrogen (HredH+ and HsredH+). XAS revealed the atomic coordinate dispersion (i.e., the Debye-Waller parameter, 2σ2) of the iron-ligand bonds and Fe-Fe distances in the oxidized and reduced H-cluster. 2σ2 showed a temperature dependence typical for the so-called protein-glass transition, with small changes below ∼200 K and a pronounced increase above this "breakpoint". This behavior is attributed to the freezing-out of larger-scale anharmonic motions of amino acid side chains and water species. We propose that protonation at [4Fe]H as well as ligand rearrangement and μH- binding at [2Fe]H are impaired because of restricted molecular mobility at cryogenic temperatures so that protonation can be biased toward adt. We conclude that a H-cluster with a μCO, selective [4Fe]H or [2Fe]H protonation, and catalytic proton transfer via adt facilitates efficient H2 conversion in [FeFe]-hydrogenase.
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Affiliation(s)
- Sven T Stripp
- Physics Department, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
| | - Stefan Mebs
- Physics Department, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
| | - Michael Haumann
- Physics Department, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
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45
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Denhof A, Olaru M, Lork E, Mebs S, Chęcińska L, Beckmann J. Silyl Cations Stabilized by Pincer Type Ligands with Adjustable Donor Atoms. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000800] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Andreas Denhof
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Marian Olaru
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
- Department of Chemistry Supramolecular Organic and Organometallic Chemistry Centre Babes‐Bolyai University 11 Arany Janos 400028 Cluj‐Napoca Romania
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Lilianna Chęcińska
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
- Department of Theoretical and Structural Chemistry Faculty of Chemistry University of Lodz Pomorska 163/165 90‐236 Lodz Poland
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
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46
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Meyer F, Hupf E, Lork E, Grabowsky S, Mebs S, Beckmann J. Bis(6‐diphenylphosphino‐acenaphth‐5‐yl)sulfoxide: A New Ligand for Late Transition Metal Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Fabio Meyer
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 3 und 7 28359 Bremen Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 3 und 7 28359 Bremen Germany
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 3 und 7 28359 Bremen Germany
| | - Simon Grabowsky
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 3 und 7 28359 Bremen Germany
- Departement für Chemie und Biochemie Universität Bern Freiestrasse 3 3012 Bern Switzerland
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 3 und 7 28359 Bremen Germany
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47
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Beltrán-Suito R, Forstner V, Hausmann JN, Mebs S, Schmidt J, Zaharieva I, Laun K, Zebger I, Dau H, Menezes PW, Driess M. A soft molecular 2Fe-2As precursor approach to the synthesis of nanostructured FeAs for efficient electrocatalytic water oxidation. Chem Sci 2020; 11:11834-11842. [PMID: 34123210 PMCID: PMC8162750 DOI: 10.1039/d0sc04384b] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 10/07/2020] [Indexed: 12/03/2022] Open
Abstract
An unprecedented molecular 2Fe-2As precursor complex was synthesized and transformed under soft reaction conditions to produce an active and long-term stable nanocrystalline FeAs material for electrocatalytic water oxidation in alkaline media. The 2Fe2As-centred β-diketiminato complex, having an unusual planar Fe2As2 core structure, results from the salt-metathesis reaction of the corresponding β-diketiminato FeIICl complex and the AsCO- (arsaethynolate) anion as the monoanionic As- source. The as-prepared FeAs phase produced from the precursor has been electrophoretically deposited on conductive electrode substrates and shown to act as a electro(pre)catalyst for the oxygen evolution reaction (OER). The deposited FeAs undergoes corrosion under the severe anodic alkaline conditions which causes extensive dissolution of As into the electrolyte forming finally an active two-line ferrihydrite phase (Fe2O3(H2O) x ). Importantly, the dissolved As in the electrolyte can be fully recaptured (electro-deposited) at the counter electrode making the complete process eco-conscious. The results represent a new and facile entry to unexplored nanostructured transition-metal arsenides and their utilization for high-performance OER electrocatalysis, which are also known to be magnificent high-temperature superconductors.
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Affiliation(s)
- Rodrigo Beltrán-Suito
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin Straße des 17 Juni 135, Sekr. C2 10623 Berlin Germany
| | - Viktoria Forstner
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin Straße des 17 Juni 135, Sekr. C2 10623 Berlin Germany
| | - J Niklas Hausmann
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin Straße des 17 Juni 135, Sekr. C2 10623 Berlin Germany
| | - Stefan Mebs
- Fachbereich Physik, Freie Universität Berlin Arnimallee 14 Berlin 14195 Germany
| | - Johannes Schmidt
- Department of Chemistry: Functional Materials, Technische Universität Berlin Hardenbergstraße 40 Berlin 10623 Germany
| | - Ivelina Zaharieva
- Fachbereich Physik, Freie Universität Berlin Arnimallee 14 Berlin 14195 Germany
| | - Konstantin Laun
- Institut für Chemie, Max-Volmar-Laboratorium für Biophysikalische Chemie, Technische Universität Berlin Straße des 17 Juni 135 Berlin 10623 Germany
| | - Ingo Zebger
- Institut für Chemie, Max-Volmar-Laboratorium für Biophysikalische Chemie, Technische Universität Berlin Straße des 17 Juni 135 Berlin 10623 Germany
| | - Holger Dau
- Fachbereich Physik, Freie Universität Berlin Arnimallee 14 Berlin 14195 Germany
| | - Prashanth W Menezes
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin Straße des 17 Juni 135, Sekr. C2 10623 Berlin Germany
| | - Matthias Driess
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin Straße des 17 Juni 135, Sekr. C2 10623 Berlin Germany
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48
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Aman M, Dostál L, Mikysek T, Růžičková Z, Mebs S, Beckmann J, Jambor R. Study of Donor–Acceptor Bonds on the
N
‐Coordinated Sn/Pb(II) Atoms in
peri
‐Substituted Naphthalenes: Evidence of Pb→B Interaction. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000696] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Michal Aman
- Department of General and Inorganic Chemistry University of Pardubice 532 10 Pardubice Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry University of Pardubice 532 10 Pardubice Czech Republic
| | - Tomáš Mikysek
- Department of Analytical Chemistry University of Pardubice 532 10 Pardubice Czech Republic
| | - Zdenka Růžičková
- Department of General and Inorganic Chemistry University of Pardubice 532 10 Pardubice Czech Republic
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Roman Jambor
- Department of General and Inorganic Chemistry University of Pardubice 532 10 Pardubice Czech Republic
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49
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Olaru M, Duvinage D, Naß Y, Malaspina LA, Mebs S, Beckmann J. Intramolecular Reaction of Transient Phosphenium and Arsenium Ions Giving Rise to Isolable 9-Phospha- and 9-Arsena-Fluorenium Ions. Angew Chem Int Ed Engl 2020; 59:14414-14417. [PMID: 32460394 PMCID: PMC7496934 DOI: 10.1002/anie.202006728] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Indexed: 11/22/2022]
Abstract
Transient phosphenium and arsenium ions, generated by fluoride abstraction from bis(m-terphenyl)fluoropnictogens, underwent intramolecular electrophilic attack prior to methyl group migration and gave rise to isolable 9-phospha- and 9-arsena-fluorenium ions.
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Affiliation(s)
- Marian Olaru
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Daniel Duvinage
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Yannik Naß
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Lorraine A. Malaspina
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Stefan Mebs
- Institut für ExperimentalphysikFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Jens Beckmann
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
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50
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Furan S, Lork E, Mebs S, Hupf E, Beckmann J. Transmetallation of Bis(6‐diphenylphosphinoacenaphth‐5‐yl)‐Mercury and ‐Tributyltin with Precious Metal Chlorides. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Sinas Furan
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Stefan Mebs
- Institut für Experimentalphysik Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
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