1
|
Hou P, Peschtrich S, Feuerstein W, Schoch R, Hohloch S, Breher F, Paradies J. Imidazolyl-Substituted Benzo- and Naphthodithiophenes as Precursors for the Synthesis of Transient Open-Shell Quinoids. ChemistryOpen 2023; 12:e202300003. [PMID: 36703547 PMCID: PMC10661821 DOI: 10.1002/open.202300003] [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: 01/04/2023] [Revised: 01/09/2023] [Indexed: 01/28/2023] Open
Abstract
The synthesis of three novel imidazolyl-substituted sulfur-containing heteroacenes is reported. These heteroacenes consisting of annelated benzo- and naphthothiophenes serve as precursors for the generation of open-shell quinoid heteroacenes by oxidation with alkaline ferric cyanide. Spectroscopic and computational experiments support the formation of reactive open-shell quinoids, which, however, quickly produce paramagnetic polymeric material.
Collapse
Affiliation(s)
- Peng Hou
- Chemistry DepartmentPaderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Sebastian Peschtrich
- Chemistry DepartmentPaderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Wolfram Feuerstein
- Institute of Inorganic ChemistryKarlsruhe Institute of Technology (KIT)Engesserstraße 1576131KarlsruheGermany
| | - Roland Schoch
- Chemistry DepartmentPaderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Stephan Hohloch
- Department of General, Inorganic and Theoretical ChemistryUniversity of InnsbruckInnrain 80–826020InnsbruckAustria
| | - Frank Breher
- Institute of Inorganic ChemistryKarlsruhe Institute of Technology (KIT)Engesserstraße 1576131KarlsruheGermany
| | - Jan Paradies
- Chemistry DepartmentPaderborn UniversityWarburger Strasse 10033098PaderbornGermany
| |
Collapse
|
2
|
Kitzmann WR, Hunger D, Reponen APM, Förster C, Schoch R, Bauer M, Feldmann S, van Slageren J, Heinze K. Electronic Structure and Excited-State Dynamics of the NIR-II Emissive Molybdenum(III) Analogue to the Molecular Ruby. Inorg Chem 2023; 62:15797-15808. [PMID: 37718553 DOI: 10.1021/acs.inorgchem.3c02186] [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: 09/19/2023]
Abstract
Photoactive chromium(III) complexes saw a conceptual breakthrough with the discovery of the prototypical molecular ruby mer-[Cr(ddpd)2]3+ (ddpd = N,N'-dimethyl-N,N'-dipyridin-2-ylpyridine-2,6-diamine), which shows intense long-lived near-infrared (NIR) phosphorescence from metal-centered spin-flip states. In contrast to the numerous studies on chromium(III) photophysics, only 10 luminescent molybdenum(III) complexes have been reported so far. Here, we present the synthesis and characterization of mer-MoX3(ddpd) (1, X = Cl; 2, X = Br) and cisfac-[Mo(ddpd)2]3+ (cisfac-[3]3+), an isomeric heavy homologue of the prototypical molecular ruby. For cisfac-[3]3+, we found strong zero-field splitting using magnetic susceptibility measurements and electron paramagnetic resonance spectroscopy. Electronic spectra covering the spin-forbidden transitions show that the spin-flip states in mer-1, mer-2, and cisfac-[3]3+ are much lower in energy than those in comparable chromium(III) compounds. While all three complexes show weak spin-flip phosphorescence in NIR-II, the emission of cisfac-[3]3+ peaking at 1550 nm is particularly low in energy. Femtosecond transient absorption spectroscopy reveals a short excited-state lifetime of 1.4 ns, 6 orders of magnitude shorter than that of mer-[Cr(ddpd)2]3+. Using density functional theory and ab initio multireference calculations, we break down the reasons for this disparity and derive principles for the design of future stable photoactive molybdenum(III) complexes.
Collapse
Affiliation(s)
- Winald R Kitzmann
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
- Rowland Institute, Harvard University, 100 Edwin H. Land Boulevard, Cambridge, Massachusetts 02142, United States
| | - David Hunger
- Institute of Physical Chemistry and Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Antti-Pekka M Reponen
- Rowland Institute, Harvard University, 100 Edwin H. Land Boulevard, Cambridge, Massachusetts 02142, United States
| | - Christoph Förster
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Roland Schoch
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany
| | - Matthias Bauer
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany
| | - Sascha Feldmann
- Rowland Institute, Harvard University, 100 Edwin H. Land Boulevard, Cambridge, Massachusetts 02142, United States
| | - Joris van Slageren
- Institute of Physical Chemistry and Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Katja Heinze
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| |
Collapse
|
3
|
Strübbe S, Nowakowski M, Schoch R, Bauer M. High-Resolution X-ray Absorption and Emission Spectroscopy for Detailed Analysis of New CO 2 Methanation Catalysts. Chemphyschem 2023:e202300113. [PMID: 37768846 DOI: 10.1002/cphc.202300113] [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: 02/16/2023] [Revised: 08/28/2023] [Indexed: 09/30/2023]
Abstract
A new approach for the characterization of CO2 methanation catalysts prepared by thermal decomposition of a nickel MOF by hard X-ray photon-in/photon-out spectroscopy in form of high energy resolution fluorescence detected X-ray absorption near edge structure spectroscopy (HERFD-XANES) and valence-to-core X-ray emission (VtC-XES) is presented. In contrast to conventional X-ray absorption spectroscopy, the increased resolution of both methods allows a more precise phase determination of the final catalyst, which is influenced by the conditions during MOF decomposition.
Collapse
Affiliation(s)
- Sven Strübbe
- Faculty of Science, Chemistry Department and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
| | - Michal Nowakowski
- Faculty of Science, Chemistry Department and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
| | - Roland Schoch
- Faculty of Science, Chemistry Department and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
| | - Matthias Bauer
- Faculty of Science, Chemistry Department and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098, Paderborn, Germany
| |
Collapse
|
4
|
Sieland B, Stahn M, Schoch R, Daniliuc C, Spicher S, Grimme S, Hansen A, Paradies J. Dispersion Energy-Stabilized Boron and Phosphorus Lewis Pairs. Angew Chem Int Ed Engl 2023; 62:e202308752. [PMID: 37427718 DOI: 10.1002/anie.202308752] [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: 06/21/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/11/2023]
Abstract
An isostructural series of boron/phosphorus Lewis pairs was systematically investigated. The association constants of the Lewis pairs were determined at variable temperatures, enabling the extraction of thermodynamic parameters. The stabilization of the Lewis adduct increased with increasing size of the dispersion energy donor groups, although the donor and acceptor properties of the Lewis pairs remained largely unchanged. This data was utilized to challenge state-of-the-art quantum chemical methods, which finally led to an enhanced workflow for the determination of thermochemical properties of weakly bound Lewis pairs within an accuracy of 0.6 to 1.0 kcal mol-1 for computed association free energies.
Collapse
Affiliation(s)
- Benedikt Sieland
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Marcel Stahn
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany
| | - Roland Schoch
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Constantin Daniliuc
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Sebastian Spicher
- BASF SE, RGQ/SQ-B1, Carl-Bosch Straße 38, 67056, Ludwigshafen am Rhein, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany
| | - Andreas Hansen
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany
| | - Jan Paradies
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| |
Collapse
|
5
|
Steube J, Kruse A, Bokareva OS, Reuter T, Demeshko S, Schoch R, Argüello Cordero MA, Krishna A, Hohloch S, Meyer F, Heinze K, Kühn O, Lochbrunner S, Bauer M. Janus-type emission from a cyclometalated iron(III) complex. Nat Chem 2023; 15:468-474. [PMID: 36849804 PMCID: PMC10070185 DOI: 10.1038/s41557-023-01137-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [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: 10/24/2021] [Accepted: 01/19/2023] [Indexed: 03/01/2023]
Abstract
Although iron is a dream candidate to substitute noble metals in photoactive complexes, realization of emissive and photoactive iron compounds is demanding due to the fast deactivation of their charge-transfer states. Emissive iron compounds are scarce and dual emission has not been observed before. Here we report the FeIII complex [Fe(ImP)2][PF6] (HImP = 1,1'-(1,3-phenylene)bis(3-methyl-1-imidazol-2-ylidene)), showing a Janus-type dual emission from ligand-to-metal charge transfer (LMCT)- and metal-to-ligand charge transfer (MLCT)-dominated states. This behaviour is achieved by a ligand design that combines four N-heterocyclic carbenes with two cyclometalating aryl units. The low-lying π* levels of the cyclometalating units lead to energetically accessible MLCT states that cannot evolve into LMCT states. With a lifetime of 4.6 ns, the strongly reducing and oxidizing MLCT-dominated state can initiate electron transfer reactions, which could constitute a basis for future applications of iron in photoredox catalysis.
Collapse
Affiliation(s)
- Jakob Steube
- Institute of Inorganic Chemistry, Paderborn University, Paderborn, Germany
- Center for Sustainable Systems Design, Paderborn University, Paderborn, Germany
| | - Ayla Kruse
- Department of Life, Light and Matter, University of Rostock, Rostock, Germany
- Institute for Physics, University of Rostock, Rostock, Germany
| | - Olga S Bokareva
- Institute for Physics, University of Rostock, Rostock, Germany
- Institute of Physics, University of Kassel, Kassel, Germany
| | - Thomas Reuter
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Serhiy Demeshko
- Institute of Inorganic Chemistry, University of Göttingen, Göttingen, Germany
| | - Roland Schoch
- Institute of Inorganic Chemistry, Paderborn University, Paderborn, Germany
- Center for Sustainable Systems Design, Paderborn University, Paderborn, Germany
| | - Miguel A Argüello Cordero
- Department of Life, Light and Matter, University of Rostock, Rostock, Germany
- Institute for Physics, University of Rostock, Rostock, Germany
| | - Athul Krishna
- Institute of Inorganic Chemistry, Paderborn University, Paderborn, Germany
- Center for Sustainable Systems Design, Paderborn University, Paderborn, Germany
| | - Stephan Hohloch
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innsbruck, Austria
| | - Franc Meyer
- Institute of Inorganic Chemistry, University of Göttingen, Göttingen, Germany
| | - Katja Heinze
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Oliver Kühn
- Department of Life, Light and Matter, University of Rostock, Rostock, Germany
- Institute for Physics, University of Rostock, Rostock, Germany
| | - Stefan Lochbrunner
- Department of Life, Light and Matter, University of Rostock, Rostock, Germany
- Institute for Physics, University of Rostock, Rostock, Germany
| | - Matthias Bauer
- Institute of Inorganic Chemistry, Paderborn University, Paderborn, Germany.
- Center for Sustainable Systems Design, Paderborn University, Paderborn, Germany.
| |
Collapse
|
6
|
Köring L, Stepen A, Birenheide B, Barth S, Leskov M, Schoch R, Krämer F, Breher F, Paradies J. Boron-Centered Lewis Superacid through Redox-Active Ligands: Application in C-F and S-F Bond Activation. Angew Chem Int Ed Engl 2023; 62:e202216959. [PMID: 36621900 DOI: 10.1002/anie.202216959] [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: 11/17/2022] [Revised: 01/04/2023] [Accepted: 01/04/2023] [Indexed: 01/10/2023]
Abstract
A series of redox-responsive ferrocenyl-substituted boranes and boronic esters were synthesized. Oxidation of the ferrocenyl ligand to the ferrocenium resulted in a drastic increase in the Lewis acidity beyond the strength of SbF5 , which was investigated experimentally and computationally. The resulting highly Lewis acidic boron compounds were used for catalytic C-F and S-F bond activation.
Collapse
Affiliation(s)
- Laura Köring
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Arne Stepen
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Bernhard Birenheide
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Simon Barth
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Maxim Leskov
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Roland Schoch
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Felix Krämer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Jan Paradies
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| |
Collapse
|
7
|
Dierks P, Kruse A, Bokareva OS, Al-Marri MJ, Kalmbach J, Baltrun M, Neuba A, Schoch R, Hohloch S, Heinze K, Seitz M, Kühn O, Lochbrunner S, Bauer M. Correction: Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(II) complexes. Chem Commun (Camb) 2023; 59:2990. [PMID: 36815296 DOI: 10.1039/d3cc90069j] [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: 02/24/2023]
Abstract
Correction for 'Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(II) complexes' by Philipp Dierks et al., Chem. Commun., 2021, 57, 6640-6643, https://doi.org/10.1039/D1CC01716K.
Collapse
Affiliation(s)
- Philipp Dierks
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Ayla Kruse
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Olga S Bokareva
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany.,Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Mohammed J Al-Marri
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany.,College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Jens Kalmbach
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Marc Baltrun
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Adam Neuba
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Roland Schoch
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Stephan Hohloch
- University of Innsbruck, Faculty of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical Chemistry, Innrain 80-82, Innsbruck 6020, Austria
| | - Katja Heinze
- Department of Chemistry, Johannes Gutenberg, University of Mainz, 55128 Mainz, Germany
| | - Michael Seitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Oliver Kühn
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Stefan Lochbrunner
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Matthias Bauer
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| |
Collapse
|
8
|
Köring L, Stepen A, Birenheide B, Barth S, Leskov M, Schoch R, Krämer F, Breher F, Paradies J. Boron‐Centered Lewis Superacid through Redox‐Active Ligands: Application in C−F and S−F Bond Activation. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202301632] [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: 03/09/2023]
Affiliation(s)
- Laura Köring
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Arne Stepen
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Bernhard Birenheide
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Simon Barth
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Maxim Leskov
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Roland Schoch
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Felix Krämer
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Frank Breher
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Jan Paradies
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| |
Collapse
|
9
|
Köring L, Stepen A, Birenheide B, Barth S, Leskov M, Schoch R, Krämer F, Breher F, Paradies J. Boron‐Centered Lewis Superacid through Redox‐Active Ligands: Application in C−F and S−F Bond Activation. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/anie.202301632] [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: 03/09/2023]
Affiliation(s)
- Laura Köring
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Arne Stepen
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Bernhard Birenheide
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Simon Barth
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Maxim Leskov
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Roland Schoch
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Felix Krämer
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Frank Breher
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Jan Paradies
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| |
Collapse
|
10
|
Köring L, Stepen A, Birenheide B, Barth S, Leskov M, Schoch R, Krämer F, Breher F, Paradies JHH. Boron‐Centered Lewis Superacid through Redox‐Active Ligands: Application in C–F and S–F Bond Activation. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202216959] [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: 01/11/2023]
Affiliation(s)
- Laura Köring
- University of Paderborn Faculty of Science: Universitat Paderborn Fakultat fur Naturwissenschaften Chemistry Department Warburger Strasse 100 33098 Paderborn GERMANY
| | - Arne Stepen
- University of Paderborn Faculty of Science: Universitat Paderborn Fakultat fur Naturwissenschaften Chemistry Department 33098 Paderborn GERMANY
| | - Bernhard Birenheide
- Karlsruher Institut für Technologie Fakultät für Chemie und Biowissenschaften: Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften Institut für Anorganische Chemie 76131 Karlsruhe GERMANY
| | - Simon Barth
- Karlsruher Institut für Technologie Fakultät für Chemie und Biowissenschaften: Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften Institut für Anorganische Chemie 76131 Karlsruhe GERMANY
| | - Maxim Leskov
- Karlsruher Institut für Technologie Fakultät für Chemie und Biowissenschaften: Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften Institut für Anorganische Chemie Engesserstrasse 15 76131 Karlsruhe GERMANY
| | - Roland Schoch
- University of Paderborn Faculty of Science: Universitat Paderborn Fakultat fur Naturwissenschaften Chemistry Department Warburger Strasse 100 33098 Paderborn GERMANY
| | - Felix Krämer
- Karlsruher Institut für Technologie Fakultät für Chemie und Biowissenschaften: Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften Institut für Anorganische Chemie Engesserstrasse 15 76131 Karlsruhe GERMANY
| | - Frank Breher
- Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften Institut für Anorganische Chemie 76131 Karlsruhe GERMANY
| | - Jan Henry Hakan Paradies
- Paderborn University Faculty of Science: Universitat Paderborn Fakultat fur Naturwissenschaften Chemistry Department Warburgerstrasse 100J3.202 33098 Paderborn GERMANY
| |
Collapse
|
11
|
Milutinović MM, Caković AZ, Ćoćić D, Rais E, Schoch R, Marković BS, Arsenijević N, Volarević V, Jovanović-Stević S, Bogojeski JV, Wilhelm R. Unique enantiopure camphor-based neutral arene–ruthenium(II) complexes: DNA/BSA binding, kinetic and cytotoxic studies. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2106562] [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: 10/16/2022]
Affiliation(s)
| | | | - Dušan Ćoćić
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - Eduard Rais
- Department of Chemistry, University of Paderborn, Paderborn, Germany
| | - Roland Schoch
- Department of Chemistry, University of Paderborn, Paderborn, Germany
| | - Bojana Simović Marković
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Nebojša Arsenijević
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Vladislav Volarević
- Department of Microbiology and Immunology, Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | | | | | - René Wilhelm
- Institute of Organic Chemistry, Clausthal University of Technology, Clausthal-Zellerfeld, Germany
| |
Collapse
|
12
|
Wicker G, Zhou R, Schoch R, Paradies J. Cover Picture: Sigmatropic [1,5] Carbon Shift of Transient C3 Ammonium Enolates (Angew. Chem. Int. Ed. 31/2022). Angew Chem Int Ed Engl 2022. [DOI: 10.1002/anie.202207944] [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: 11/11/2022]
Affiliation(s)
- Garrit Wicker
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Rundong Zhou
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Roland Schoch
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Jan Paradies
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| |
Collapse
|
13
|
Wicker G, Zhou R, Schoch R, Paradies J. Sigmatropic [1,5] Carbon Shift of Transient C3 Ammonium Enolates. Angew Chem Int Ed Engl 2022; 61:e202204378. [PMID: 35535567 PMCID: PMC9401041 DOI: 10.1002/anie.202204378] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Indexed: 11/22/2022]
Abstract
The stereospecific sigmatropic [1,5] carbon shift of C3 ammonium enolates is discovered. According to mechanistic, kinetic and computational experiments, this new rearrangement proceeds via the catalytic generation of a transient C3 ammonium enolate by intramolecular aza‐Michael addition. This intermediate rapidly undergoes [1,5] sigmatropic carbon migration to furnish the respective tetrahydroquinoline‐4‐ones with excellent diastereoselectivities of d.r. >99 : 1 and in 61–98 % yield.
Collapse
Affiliation(s)
- Garrit Wicker
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Rundong Zhou
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Roland Schoch
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Jan Paradies
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| |
Collapse
|
14
|
Wicker G, Zhou R, Schoch R, Paradies J. Sigmatropic [1,5] Carbon Shift of Transient C3 Ammonium Enolates. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207944] [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: 11/10/2022]
Affiliation(s)
- Garrit Wicker
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Rundong Zhou
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Roland Schoch
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Jan Paradies
- Department of Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| |
Collapse
|
15
|
Wicker G, Zhou R, Schoch R, Paradies J. Sigmatrope [1,5]‐Kohlenstoffverschiebung transienter C3‐Ammoniumenolate. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204378] [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: 11/10/2022]
Affiliation(s)
- Garrit Wicker
- Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Deutschland
| | - Rundong Zhou
- Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Deutschland
| | - Roland Schoch
- Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Deutschland
| | - Jan Paradies
- Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Deutschland
| |
Collapse
|
16
|
Hou P, Peschtrich S, Huber N, Feuerstein W, Bihlmeier A, Krummenacher I, Schoch R, Klopper W, Breher F, Paradies J. Cover Feature: Impact of Heterocycle Annulation on NIR Absorbance in Quinoid Thioacene Derivatives (Chem. Eur. J. 23/2022). Chemistry 2022. [DOI: 10.1002/chem.202200982] [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)
- Peng Hou
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Sebastian Peschtrich
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Nils Huber
- Institute of Physical Chemistry Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany
| | - Wolfram Feuerstein
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Angela Bihlmeier
- Institute of Physical Chemistry Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany
| | - Ivo Krummenacher
- Institute of Inorganic Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Roland Schoch
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Wim Klopper
- Institute of Physical Chemistry Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany
| | - Frank Breher
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Jan Paradies
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| |
Collapse
|
17
|
Hou P, Peschtrich S, Huber N, Feuerstein W, Bihlmeier A, Krummenacher I, Schoch R, Klopper W, Breher F, Paradies J. Impact of Heterocycle Annulation on NIR Absorbance in Quinoid Thioacene Derivatives. Chemistry 2022; 28:e202200478. [PMID: 35254693 PMCID: PMC9314731 DOI: 10.1002/chem.202200478] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Indexed: 11/30/2022]
Abstract
The synthesis and characterisation of a homologous series of quinoid sulfur‐containing imidazolyl‐substituted heteroacenes is described. The optoelectronic and magnetic properties were investigated by UV/vis, fluorescence and EPR spectroscopy as well as quantum‐chemical calculations, and were compared to those of the corresponding benzo congener. The room‐temperature and atmospherically stable quinoids display strong absorption in the NIR region between 678 and 819 nm. The dithieno[3,2‐b:2′,3′‐d]thiophene and the thieno[2′,3′:4,5]thieno[3,2‐b]thieno[2,3‐d]thiophene derivatives were EPR active at room temperature. For the latter, variable‐temperature EPR spectroscopy revealed the presence of a thermally accessible triplet state, with a singlet‐triplet separation of 14.1 kJ mol−1.
Collapse
Affiliation(s)
- Peng Hou
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Sebastian Peschtrich
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Nils Huber
- Institute of Physical Chemistry Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany
| | - Wolfram Feuerstein
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Angela Bihlmeier
- Institute of Physical Chemistry Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany
| | - Ivo Krummenacher
- Institute of Inorganic Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Roland Schoch
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| | - Wim Klopper
- Institute of Physical Chemistry Karlsruhe Institute of Technology (KIT) Kaiserstraße 12 76131 Karlsruhe Germany
| | - Frank Breher
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Jan Paradies
- Chemistry Department Paderborn University Warburger Straße 100 33098 Paderborn Germany
| |
Collapse
|
18
|
Ghosh P, Schoch R, Bauer M, Jacobi von Wangelin A. Selective Benzylic CH‐Borylations by Tandem Cobalt Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110821] [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: 11/10/2022]
Affiliation(s)
- Pradip Ghosh
- Dept. of Chemistry University of Hamburg Martin Luther King Pl 6 20146 Hamburg Germany
| | - Roland Schoch
- Dept. of Chemistry Center for Sustainable Systems Design, CSSD University of Paderborn 33098 Paderborn Germany
| | - Matthias Bauer
- Dept. of Chemistry Center for Sustainable Systems Design, CSSD University of Paderborn 33098 Paderborn Germany
| | | |
Collapse
|
19
|
Abstract
Metal‐catalyzed C−H activations are environmentally and economically attractive synthetic strategies for the construction of functional molecules as they obviate the need for pre‐functionalized substrates and minimize waste generation. Great challenges reside in the control of selectivities, the utilization of unbiased hydrocarbons, and the operation of atom‐economical dehydrocoupling mechanisms. An especially mild borylation of benzylic CH bonds was developed with the ligand‐free pre‐catalyst Co[N(SiMe3)2]2 and the bench‐stable and inexpensive borylation reagent B2pin2 that produces H2 as the only by‐product. A full set of kinetic, spectroscopic, and preparative mechanistic studies are indicative of a tandem catalysis mechanism of CH‐borylation and dehydrocoupling via molecular CoI catalysts.
Collapse
Affiliation(s)
- Pradip Ghosh
- Dept. of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146, Hamburg, Germany
| | - Roland Schoch
- Dept. of Chemistry, Center for Sustainable Systems Design, CSSD, University of Paderborn, 33098, Paderborn, Germany
| | - Matthias Bauer
- Dept. of Chemistry, Center for Sustainable Systems Design, CSSD, University of Paderborn, 33098, Paderborn, Germany
| | | |
Collapse
|
20
|
Emmerling ST, Ziegler F, Fischer FR, Schoch R, Bauer M, Plietker B, Buchmeiser MR, Lotsch BV. Olefin Metathesis in Confinement: Towards Covalent Organic Framework Scaffolds for Increased Macrocyclization Selectivity. Chemistry 2021; 28:e202104108. [PMID: 34882848 PMCID: PMC9305778 DOI: 10.1002/chem.202104108] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 11/15/2021] [Indexed: 12/02/2022]
Abstract
Covalent organic frameworks (COFs) offer vast structural and chemical diversity enabling a wide and growing range of applications. While COFs are well‐established as heterogeneous catalysts, so far, their high and ordered porosity has scarcely been utilized to its full potential when it comes to spatially confined reactions in COF pores to alter the outcome of reactions. Here, we present a highly porous and crystalline, large‐pore COF as catalytic support in α,ω‐diene ring‐closing metathesis reactions, leading to increased macrocyclization selectivity. COF pore‐wall modification by immobilization of a Grubbs‐Hoveyda‐type catalyst via a mild silylation reaction provides a molecularly precise heterogeneous olefin metathesis catalyst. An increased macro(mono)cyclization (MMC) selectivity over oligomerization (O) for the heterogeneous COF‐catalyst (MMC:O=1.35) of up to 51 % compared to the homogeneous catalyst (MMC:O=0.90) was observed along with a substrate‐size dependency in selectivity, pointing to diffusion limitations induced by the pore confinement.
Collapse
Affiliation(s)
- Sebastian T Emmerling
- Max-Planck-Institut für Festkörperforschung: Max-Planck-Institut fur Festkorperforschung, Nanochemistry, GERMANY
| | | | | | | | | | - Bernd Plietker
- Technische Universitat Dresden, Organische Chemie, GERMANY
| | | | - Bettina Valeska Lotsch
- Max Planck Institute for Solid State Research, Nanochemistry, Heisenbergstraße 1, 70569, Stuttgart, GERMANY
| |
Collapse
|
21
|
Watt FA, Sieland B, Dickmann N, Schoch R, Herbst-Irmer R, Ott H, Paradies J, Kuckling D, Hohloch S. Coupling of CO 2 and epoxides catalysed by novel N-fused mesoionic carbene complexes of nickel(II). Dalton Trans 2021; 50:17361-17371. [PMID: 34788774 DOI: 10.1039/d1dt03311e] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the syntheses of two rigid mesoionic carbene (MIC) ligands with a carbazole backbone via an intramolecular Finkelstein-cyclisation cascade and investigate their coordination behavior towards nickel(II) acetate. Despite the nickel(II) carbene complexes 4a,b showing only minor differences in their chemical composition, they display curious differences in their chemical properties, e.g. solubility. Furthermore, the potential of these novel MIC complexes in the coupling of carbon dioxide and epoxides as well as the differences in reactivity compared to classical NHC-derived complexes are evaluated.
Collapse
Affiliation(s)
- Fabian A Watt
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Benedikt Sieland
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Nicole Dickmann
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Roland Schoch
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Regine Herbst-Irmer
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstraße 4, 37077 Göttingen, Germany
| | - Holger Ott
- Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany
| | - Jan Paradies
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Dirk Kuckling
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- University of Innsbruck, Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| |
Collapse
|
22
|
Reuter T, Kruse A, Schoch R, Lochbrunner S, Bauer M, Heinze K. Higher MLCT lifetime of carbene iron(II) complexes by chelate ring expansion. Chem Commun (Camb) 2021; 57:7541-7544. [PMID: 34240092 DOI: 10.1039/d1cc02173g] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Combining strong σ-donating N-heterocyclic carbene ligands and π-accepting pyridine ligands with a high octahedricity in rigid iron(ii) complexes increases the 3MLCT lifetime from 0.15 ps in the prototypical [Fe(tpy)2]2+ complex to 9.2 ps in [Fe(dpmi)2]2+12+. The tripodal CNN ligand dpmi (di(pyridine-2-yl)(3-methylimidazol-2-yl)methane) forms six-membered chelate rings with the iron(ii) centre leading to close to 90° bite angles and enhanced iron-ligand orbital overlap.
Collapse
Affiliation(s)
- Thomas Reuter
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, Germany.
| | - Ayla Kruse
- Institute for Physics and Department of Life, Light and Matter, University of Rostock, Rostock 18051, Germany
| | - Roland Schoch
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, Paderborn 33098, Germany
| | - Stefan Lochbrunner
- Institute for Physics and Department of Life, Light and Matter, University of Rostock, Rostock 18051, Germany
| | - Matthias Bauer
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, Paderborn 33098, Germany
| | - Katja Heinze
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, Germany.
| |
Collapse
|
23
|
Huber‐Gedert M, Nowakowski M, Kertmen A, Burkhardt L, Lindner N, Schoch R, Herbst‐Irmer R, Neuba A, Schmitz L, Choi T, Kubicki J, Gawelda W, Bauer M. Fundamental Characterization, Photophysics and Photocatalysis of a Base Metal Iron(II)-Cobalt(III) Dyad. Chemistry 2021; 27:9905-9918. [PMID: 33884671 PMCID: PMC8362051 DOI: 10.1002/chem.202100766] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 03/02/2021] [Indexed: 12/13/2022]
Abstract
A new base metal iron-cobalt dyad has been obtained by connection between a heteroleptic tetra-NHC iron(II) photosensitizer combining a 2,6-bis[3-(2,6-diisopropylphenyl)imidazol-2-ylidene]pyridine with 2,6-bis(3-methyl-imidazol-2-ylidene)-4,4'-bipyridine ligand, and a cobaloxime catalyst. This novel iron(II)-cobalt(III) assembly has been extensively characterized by ground- and excited-state methods like X-ray crystallography, X-ray absorption spectroscopy, (spectro-)electrochemistry, and steady-state and time-resolved optical absorption spectroscopy, with a particular focus on the stability of the molecular assembly in solution and determination of the excited-state landscape. NMR and UV/Vis spectroscopy reveal dissociation of the dyad in acetonitrile at concentrations below 1 mM and high photostability. Transient absorption spectroscopy after excitation into the metal-to-ligand charge transfer absorption band suggests a relaxation cascade originating from hot singlet and triplet MLCT states, leading to the population of the 3 MLCT state that exhibits the longest lifetime. Finally, decay into the ground state involves a 3 MC state. Attachment of cobaloxime to the iron photosensitizer increases the 3 MLCT lifetime at the iron centre. Together with the directing effect of the linker, this potentially makes the dyad more active in photocatalytic proton reduction experiments than the analogous two-component system, consisting of the iron photosensitizer and Co(dmgH)2 (py)Cl. This work thus sheds new light on the functionality of base metal dyads, which are important for more efficient and sustainable future proton reduction systems.
Collapse
Affiliation(s)
- Marina Huber‐Gedert
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| | - Michał Nowakowski
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| | - Ahmet Kertmen
- Faculty of PhysicsAdam Mickiewicz University Poznańul. Uniwersytetu Poznańskiego 2Poznań61-614Poland
| | - Lukas Burkhardt
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| | - Natalia Lindner
- Faculty of PhysicsAdam Mickiewicz University Poznańul. Uniwersytetu Poznańskiego 2Poznań61-614Poland
| | - Roland Schoch
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| | - Regine Herbst‐Irmer
- Institut für Anorganische ChemieUniversität GöttingenTammannstraße 437077GöttingenGermany
| | - Adam Neuba
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| | - Lennart Schmitz
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| | | | - Jacek Kubicki
- Faculty of PhysicsAdam Mickiewicz University Poznańul. Uniwersytetu Poznańskiego 2Poznań61-614Poland
| | - Wojciech Gawelda
- Faculty of PhysicsAdam Mickiewicz University Poznańul. Uniwersytetu Poznańskiego 2Poznań61-614Poland
- Department of ChemistryUniversidad Autónoma de MadridCampus Universitario28049MadridSpain
- IMDEA-NanocienciaCalle Faraday 928049MadridSpain
| | - Matthias Bauer
- Department ChemieUniversität PaderbornWarburger Straße 10033098PaderbornGermany
| |
Collapse
|
24
|
Dierks P, Kruse A, Bokareva OS, Al-Marri MJ, Kalmbach J, Baltrun M, Neuba A, Schoch R, Hohloch S, Heinze K, Seitz M, Kühn O, Lochbrunner S, Bauer M. Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(II) complexes. Chem Commun (Camb) 2021; 57:6640-6643. [PMID: 34126627 DOI: 10.1039/d1cc01716k] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Two closely related FeII complexes with 2,6-bis(1-ethyl-1H-1,2,3-triazol-4yl)pyridine and 2,6-bis(1,2,3-triazol-5-ylidene)pyridine ligands are presented to gain new insights into the photophysics of bis(tridentate) iron(ii) complexes. The [Fe(N^N^N)2]2+ pseudoisomer sensitizes singlet oxygen through a MC state with nanosecond lifetime after MLCT excitation, while the bis(tridentate) [Fe(C^N^C)2]2+ pseudoisomer possesses a similar 3MLCT lifetime as the tris(bidentate) [Fe(C^C)2(N^N)]2+ complexes with four mesoionic carbenes.
Collapse
Affiliation(s)
- Philipp Dierks
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Ayla Kruse
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Olga S Bokareva
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany and Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Mohammed J Al-Marri
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany and College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Jens Kalmbach
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Marc Baltrun
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Adam Neuba
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Roland Schoch
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| | - Stephan Hohloch
- University of Innsbruck, Faculty of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical Chemistry, Innrain 80-82, Innsbruck 6020, Austria
| | - Katja Heinze
- Department of Chemistry, Johannes Gutenberg, University of Mainz, 55128 Mainz, Germany
| | - Michael Seitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Oliver Kühn
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Stefan Lochbrunner
- Institute of Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Matthias Bauer
- Faculty of Science, Chemistry Department and Centre for Sustainable Systems Design, Paderborn University, 33098 Paderborn, Germany.
| |
Collapse
|
25
|
Wicker G, Schoch R, Paradies J. Diastereoselective Synthesis of Dihydro-quinolin-4-ones by a Borane-Catalyzed Redox-Neutral endo-1,7-Hydride Shift. Org Lett 2021; 23:3626-3630. [PMID: 33843243 DOI: 10.1021/acs.orglett.1c01018] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The borane-catalyzed synthesis of dihydroquinoline-4-ones is developed. The amino-substituted chalcones undergo a 1,7-hydride shift upon Lewis acid activation to form a zwitterionic iminium enolate, which collapses to the dihydroquinoline-4-one scaffold. The reaction proceeds in high yields (75-99%) with an excellent diastereoselectivity of up to >99:1 (cis:trans). The reaction mechanism is investigated by kinetic, isotope labeling, and computational experiments.
Collapse
Affiliation(s)
- Garrit Wicker
- Paderborn University, Chemistry Department, Warburger-Strasse 100, D-33098 Paderborn, Germany
| | - Roland Schoch
- Paderborn University, Chemistry Department, Warburger-Strasse 100, D-33098 Paderborn, Germany
| | - Jan Paradies
- Paderborn University, Chemistry Department, Warburger-Strasse 100, D-33098 Paderborn, Germany
| |
Collapse
|
26
|
Watt FA, Burkhardt L, Schoch R, Mitzinger S, Bauer M, Weigend F, Goicoechea JM, Tambornino F, Hohloch S. η
3
‐Coordination and Functionalization of the 2‐Phosphaethynthiolate Anion at Lanthanum(III)**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100559] [Citation(s) in RCA: 4] [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: 02/05/2023]
Affiliation(s)
- Fabian A. Watt
- Department of Chemistry and Center for Sustainable Systems Design (CSSD) Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Lukas Burkhardt
- Department of Chemistry and Center for Sustainable Systems Design (CSSD) Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Roland Schoch
- Department of Chemistry and Center for Sustainable Systems Design (CSSD) Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Stefan Mitzinger
- Department of Chemistry University of Oxford Chemistry Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
| | - Matthias Bauer
- Department of Chemistry and Center for Sustainable Systems Design (CSSD) Paderborn University Warburger Strasse 100 33098 Paderborn Germany
| | - Florian Weigend
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW) Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Jose M. Goicoechea
- Department of Chemistry University of Oxford Chemistry Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
| | - Frank Tambornino
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW) Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Stephan Hohloch
- Institute for General, Inorganic and Theoretical Chemistry University of Innsbruck Innrain 80–82 6020 Innsbruck Austria
| |
Collapse
|
27
|
Watt FA, Burkhardt L, Schoch R, Mitzinger S, Bauer M, Weigend F, Goicoechea JM, Tambornino F, Hohloch S. η 3 -Coordination and Functionalization of the 2-Phosphaethynthiolate Anion at Lanthanum(III)*. Angew Chem Int Ed Engl 2021; 60:9534-9539. [PMID: 33565689 PMCID: PMC8252525 DOI: 10.1002/anie.202100559] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 01/13/2021] [Indexed: 01/08/2023]
Abstract
We present the η3 -coordination of the 2-phosphaethynthiolate anion in the complex (PN)2 La(SCP) (2) [PN=N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide)]. Structural comparison with dinuclear thiocyanate-bridged (PN)2 La(μ-1,3-SCN)2 La(PN)2 (3) and azide-bridged (PN)2 La(μ-1,3-N3 )2 La(PN)2 (4) complexes indicates that the [SCP]- coordination mode is mainly governed by electronic, rather than steric factors. Quantum mechanical investigations reveal large contributions of the antibonding π*-orbital of the [SCP]- ligand to the LUMO of complex 2, rendering it the ideal precursor for the first functionalization of the [SCP]- anion. Complex 2 was therefore reacted with CAACs which induced a selective rearrangement of the [SCP]- ligand to form the first CAAC stabilized group 15-group 16 fulminate-type complexes (PN)2 La{SPC(R CAAC)} (5 a,b, R=Ad, Me). A detailed reaction mechanism for the SCP-to-SPC isomerization is proposed based on DFT calculations.
Collapse
Affiliation(s)
- Fabian A. Watt
- Department of Chemistry and Center for Sustainable Systems Design (CSSD)Paderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Lukas Burkhardt
- Department of Chemistry and Center for Sustainable Systems Design (CSSD)Paderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Roland Schoch
- Department of Chemistry and Center for Sustainable Systems Design (CSSD)Paderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Stefan Mitzinger
- Department of ChemistryUniversity of OxfordChemistry Research Laboratory12 Mansfield RoadOxfordOX1 3TAUK
| | - Matthias Bauer
- Department of Chemistry and Center for Sustainable Systems Design (CSSD)Paderborn UniversityWarburger Strasse 10033098PaderbornGermany
| | - Florian Weigend
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW)Philipps-Universität MarburgHans-Meerwein-Strasse 435032MarburgGermany
| | - Jose M. Goicoechea
- Department of ChemistryUniversity of OxfordChemistry Research Laboratory12 Mansfield RoadOxfordOX1 3TAUK
| | - Frank Tambornino
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW)Philipps-Universität MarburgHans-Meerwein-Strasse 435032MarburgGermany
| | - Stephan Hohloch
- Institute for General, Inorganic and Theoretical ChemistryUniversity of InnsbruckInnrain 80–826020InnsbruckAustria
| |
Collapse
|
28
|
Schmiegel CJ, Berg P, Obst F, Schoch R, Appelhans D, Kuckling D. Continuous Flow Synthesis of Azoxybenzenes by Reductive Dimerization of Nitrosobenzenes with Gel‐Bound Catalysts. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100006] [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: 11/11/2022]
Affiliation(s)
- Carsten J. Schmiegel
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Patrik Berg
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Franziska Obst
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - Roland Schoch
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| | - Dietmar Appelhans
- Leibniz Institute for Polymer Research Dresden Hohe Str. 6 01069 Dresden Germany
| | - Dirk Kuckling
- Department of Chemistry, Faculty of Science Paderborn University Warburger Str. 100 33098 Paderborn Germany
| |
Collapse
|
29
|
Liu S, Amaro-Estrada JI, Baltrun M, Douair I, Schoch R, Maron L, Hohloch S. Catalytic Deoxygenation of Nitroarenes Mediated by High-Valent Molybdenum(VI)–NHC Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00352] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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)
- Shenyu Liu
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | | | - Marc Baltrun
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Iskander Douair
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Roland Schoch
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Stephan Hohloch
- University of Innsbruck, Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria
| |
Collapse
|
30
|
Watt F, Dickmann N, Schoch R, Hohloch S. Isocyanate Insertion into a La-P Phosphide Bond: A Versatile Route to Phosphaureate-Bridged Heterobimetallic Lanthanide-Coinage-Metal Complexes. Inorg Chem 2020; 59:13621-13631. [PMID: 32885972 PMCID: PMC7509844 DOI: 10.1021/acs.inorgchem.0c01971] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Indexed: 01/01/2023]
Abstract
A new route to heterobimetallic lanthanide-coinage-metal complexes is disclosed. The selective insertion of organic substrates such as phenyl iso(thio)cyanate into the La-P bond of the primary phosphido complex (PN)2La(PHMes) (1) (with PN- = (N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide) yields the phospha(thio)ureate complexes (PN)2La(OC(NPh)(PHMes)) (2) and (PN)2La(SC(NPh)(PHMes)) (3) with retention of the PH protons. Subsequent deprotonation of the phosphaureate complex 2 with potassium hexamethyldisilazide (KHMDS, K[N(SiMe3)2]) leads to the polymeric complex [K{(PN)2La(OC(NPh)(PMes))}]n (4). Complex 4 was found to be an excellent precursor for salt metathesis reactions with copper(I) and gold(I) chlorides supported by an N-heterocyclic carbene (NHC, 5 and 6) or a cyclic alkyl amino carbene (CAAC, 7 and 8). This resulted in the unprecedented formation of heterobimetallic lanthanum-coinage-metal complexes, containing the first example of a μ,κ2(O,N):κ1(P)-phosphaureate bridging ligand. For an alternative route to complex 8 a direct protonolysis protocol between a new basic gold(I) precursor, namely (MeCAAC)Au(HMDS), and 2 was also investigated. The complexes have been characterized by multinuclear NMR spectroscopy, IR spectroscopy, and X-ray crystallography (except for 8).
Collapse
Affiliation(s)
- Fabian
A. Watt
- Paderborn
University, Faculty of Science,
Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Nicole Dickmann
- Paderborn
University, Faculty of Science,
Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Roland Schoch
- Paderborn
University, Faculty of Science,
Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- University
of Innsbruck, Faculty of Chemistry
and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria
| |
Collapse
|
31
|
Abstract
We report the synthesis of high-valent molybdenum(VI) bis-imido complexes 1-4 with dipyrromethene (DPM) supporting ligands of the general formula (DPMR)Mo(NR')2Cl (R, R' = mesityl (Mes) or tert-butyl (tBu)). The electrochemical and chemical properties of 1-4 reveal unexpected ligand noninnocence and reactivity. 15N NMR spectroscopy is used to assess the electronic properties of the imido ligands in the tert-butyl complexes 1 and 3. Complex 1 is inert toward ligand (halide) exchange with bulky phenolates such as KOMes or amides (e.g., KN(SiMe3)2), whereas the use of the lithium alkyl LiCH2SiMe3 results in a rare nucleophilic β-alkylation of the DPM ligand. While the reductions of the complexes occur at molybdenum, the oxidation is centered at the DPM ligand. Quantum-chemical calculations (complete active space self-consistent field, density functional theory) suggest facile (near-infrared) interligand charge transfer to the imido ligand, which might preclude the isolation of the oxidized complex [1]+ in the experiment.
Collapse
Affiliation(s)
- Jan Locher
- Department of Chemistry, Paderborn University, 33098 Paderborn, Germany
| | - Fabian A Watt
- Department of Chemistry, Paderborn University, 33098 Paderborn, Germany
| | - Adam G Neuba
- Department of Chemistry, Paderborn University, 33098 Paderborn, Germany
| | - Roland Schoch
- Department of Chemistry, Paderborn University, 33098 Paderborn, Germany
| | - Dominik Munz
- Inorganic Chemistry, University of the Saarland, 66123 Saarbrücken, Germany.,Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Stephan Hohloch
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
| |
Collapse
|
32
|
Vukadinovic Y, Burkhardt L, Päpcke A, Miletic A, Fritsch L, Altenburger B, Schoch R, Neuba A, Lochbrunner S, Bauer M. When Donors Turn into Acceptors: Ground and Excited State Properties of FeII Complexes with Amine-Substituted Tridentate Bis-imidazole-2-ylidene Pyridine Ligands. Inorg Chem 2020; 59:8762-8774. [DOI: 10.1021/acs.inorgchem.0c00393] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yannik Vukadinovic
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Lukas Burkhardt
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Ayla Päpcke
- Institute for Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Anabel Miletic
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Lorena Fritsch
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Björn Altenburger
- Institute for Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Roland Schoch
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Adam Neuba
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stefan Lochbrunner
- Institute for Physics and Department of Life, Light and Matter, University of Rostock, 18051 Rostock, Germany
| | - Matthias Bauer
- Department of Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| |
Collapse
|
33
|
Schoch A, Burkhardt L, Schoch R, Stührenberg K, Bauer M. Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?). Faraday Discuss 2020; 220:113-132. [PMID: 31532420 DOI: 10.1039/c9fd00070d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Established and recent hard X-ray spectroscopic methods in the form of conventional X-ray absorption near edge structure spectroscopy (XANES) and extended X-ray absorption fine structure spectroscopy (EXAFS), and the photon-in/photon-out techniques high energy resolution fluorescence detection XANES and valence-to-core X-ray emission spectroscopy (VtC-XES) provide unique opportunities to study mechanisms in metal-organic reactions. The combination of these techniques allows the determination of the local geometric and electronic structures in the form of the numbers of nearest neighbours, their types and distances around an X-ray absorbing atom and the highest occupied and lowest unoccupied molecular levels. Different sample cells for this purpose, which allow high pressure, electrochemical or multi-spectroscopic measurements under inert conditions, are presented and discussed. The potential of HERFD-XANES and VtC-XES to eliminate limitations of conventional EXAFS spectroscopy is established with case studies on the Hieber anion [Fe(CO)3(NO)]- and the iron hydride complex [Fe(CO)H(NO)(PPh3)2]. With VtC-XES the formation of an allyl complex by reaction of [Fe(CO)3(NO)]- in a catalytic nucleophilic substitution reaction can be followed. Combination of HERFD-XANES and VtC-XES allows the identification and investigation of hydride species, as well as their fate in chemical reactions. On the other hand, in order to investigate the active species formation in iron-catalysed cross coupling reactions, conventional XANES and EXAFS are the method of choice for the moment. For all examples, the advantages and limitations of the hard X-ray toolbox are commented on and the value of the individual methods are compared.
Collapse
Affiliation(s)
- Anke Schoch
- Paderborn University, Department of Chemistry, Warburger Str. 100, 33098 Paderborn, Germany.
| | | | | | | | | |
Collapse
|
34
|
Watt FA, Krishna A, Golovanov G, Ott H, Schoch R, Wölper C, Neuba AG, Hohloch S. Monoanionic Anilidophosphine Ligand in Lanthanide Chemistry: Scope, Reactivity, and Electrochemistry. Inorg Chem 2020; 59:2719-2732. [PMID: 31961137 DOI: 10.1021/acs.inorgchem.9b03071] [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: 12/16/2022]
Abstract
We present the synthesis of a series of new lanthanide(III) complexes supported by a monoanionic bidentate anilidophosphine ligand (N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide, short PN-). The work comprises the characterization of a variety of heteroleptic complexes containing either one or two PN ligands as well as a study on further functionalization possibilities. The new heteroleptic complexes cover selected examples over the whole lanthanide(III) series including lanthanum, cerium, neodymium, gadolinium, terbium, dysprosium, and lutetium. In case of the two diamagnetic metal cations lanthanum(III) and lutetium(III), we have furthermore studied the influence of the lanthanide ion (early vs. late) on the reactivity of these complexes. Thereby we found that the radius of the lanthanide ion has a major influence on the reactivity. Using sterically demanding, multidentate ligand systems, e.g., cyclopentadienide (Cp-), we found that the lanthanum complex La(PN)2Cl (1-La) reacts well to the corresponding cyclopentadienide complex, while for Lu(PN)2Cl (1-Lu) no reaction was observed under any conditions tested. On the contrary, employing monodentate ligands such as mesitolate, thiomesitolate, 2,4,6-trimethylanilide or 2,4,6-trimethylphenylphosphide, results in the clean formation of the desired complexes for both lanthanum and lutetium. All complexes have been studied by various techniques, including multi nuclear NMR spectroscopy and X-ray crystallography. 31P NMR spectroscopy was furthermore used to evaluate the presence of open coordination sites on the complexes using coordinating and noncoordinating solvents, and as a probe for estimating the Ce-P distance in the corresponding complexes. Additionally, we present cyclic voltammetry (CV) data for Ce(PN)2Cl (1-Ce), La(PN)2Cl (1-La), Ce(PN)(HMDS)2 (8-Ce) and La(PN)(HMDS)2 (8-La) (with HMDS = hexamethyldisilazide, (Me3Si)2N-) exploring the potential of the anilidophosphane ligand framework to stabilize a potential Ce(IV) ion.
Collapse
Affiliation(s)
- Fabian A Watt
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Athul Krishna
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Grigoriy Golovanov
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Holger Ott
- Training Center, Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany
| | - Roland Schoch
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Christoph Wölper
- Faculty of Chemistry, University of Essen-Duisburg, Universitätsstraße 5-7, 45141 Essen, Germany
| | - Adam G Neuba
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| |
Collapse
|
35
|
Grauke R, Schepper R, Rabeah J, Schoch R, Bentrup U, Bauer M, Brückner A. Front Cover: Impact of Al Activators on Structure and Catalytic Performance of Cr Catalysts in Homogeneous Ethylene Oligomerization – A Multitechnique
in situ/operando
Study (ChemCatChem 4/2020). ChemCatChem 2020. [DOI: 10.1002/cctc.202000007] [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: 11/08/2022]
Affiliation(s)
- Reni Grauke
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Rahel Schepper
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Jabor Rabeah
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Roland Schoch
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Ursula Bentrup
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Matthias Bauer
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Angelika Brückner
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
- Department Life, Light & Matter Faculty for Interdisciplinary ResearchUniversity of Rostock Albert-Einstein-Straße 25 Rostock 18059 Germany
| |
Collapse
|
36
|
Grauke R, Schepper R, Rabeah J, Schoch R, Bentrup U, Bauer M, Brückner A. Impact of Al Activators on Structure and Catalytic Performance of Cr Catalysts in Homogeneous Ethylene Oligomerization – A Multitechnique
in situ/operando
Study. ChemCatChem 2020. [DOI: 10.1002/cctc.202000068] [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)
- Reni Grauke
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Rahel Schepper
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Jabor Rabeah
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Roland Schoch
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Ursula Bentrup
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Matthias Bauer
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Angelika Brückner
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
- Department Life, Light & Matter, Faculty for Interdisciplinary ResearchUniversity of Rostock Albert-Einstein-Straße 25 Rostock 18059 Germany
| |
Collapse
|
37
|
Kalinko A, Caliebe WA, Schoch R, Bauer M. A von Hamos-type hard X-ray spectrometer at the PETRA III beamline P64. J Synchrotron Radiat 2020; 27:31-36. [PMID: 31868733 PMCID: PMC6927517 DOI: 10.1107/s1600577519013638] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 10/05/2019] [Indexed: 05/20/2023]
Abstract
The design and performance of the high-resolution wavelength-dispersive multi-crystal von Hamos-type spectrometer at PETRA III beamline P64 are described. Extended analyzer crystal collection available at the beamline allows coverage of a broad energy range from 5 keV to 20 keV with an energy resolution of 0.35-1 eV. Particular attention was paid to enabling two-color measurements by a combination of two types of analyzer crystals and two two-dimensional detectors. The performance of the spectrometer is demonstrated by elastic-line and emission-line measurements on various compounds.
Collapse
Affiliation(s)
- Aleksandr Kalinko
- Department Chemie and Center for Sustainable Systems Design (CSSD), Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
- Photon Science DESY, Notkestraße 85, 22607 Hamburg, Germany
- Correspondence e-mail:
| | | | - Roland Schoch
- Department Chemie and Center for Sustainable Systems Design (CSSD), Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
| | - Matthias Bauer
- Department Chemie and Center for Sustainable Systems Design (CSSD), Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
| |
Collapse
|
38
|
Abstract
Deprotonation of the terminal phosphido complex (PN)2La(PHMes) results in the C–H-activation of one of the PN ligands via a transient phosphinidene complex.
Collapse
|
39
|
Grauke R, Schepper R, Rabeah J, Schoch R, Bentrup U, Bauer M, Brückner A. Impact of Al Activators on Structure and Catalytic Performance of Cr Catalysts in Homogeneous Ethylene Oligomerization – A Multitechnique
in situ/operando
Study. ChemCatChem 2019. [DOI: 10.1002/cctc.201901441] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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)
- Reni Grauke
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Rahel Schepper
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Jabor Rabeah
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Roland Schoch
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Ursula Bentrup
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Matthias Bauer
- Department Chemie and Center for Sustainable Systems Design (CSSD)Universität Paderborn Warburger Straße 100 Paderborn D-33098 Germany
| | - Angelika Brückner
- Leibniz-Institut für Katalyse e. V. an derUniversität Rostock (LIKAT) Albert-Einstein-Str. 29a Rostock 18059 Germany
- Department Life, Light & Matter Faculty for Interdisciplinary ResearchUniversity of Rostock Albert-Einstein-Straße 25 Rostock 18059 Germany
| |
Collapse
|
40
|
Affiliation(s)
- Marc Baltrun
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Fabian A. Watt
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Roland Schoch
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| |
Collapse
|
41
|
Steube J, Burkhardt L, Päpcke A, Moll J, Zimmer P, Schoch R, Wölper C, Heinze K, Lochbrunner S, Bauer M. Cover Feature: Excited‐State Kinetics of an Air‐Stable Cyclometalated Iron(II) Complex (Chem. Eur. J. 51/2019). Chemistry 2019. [DOI: 10.1002/chem.201902931] [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)
- Jakob Steube
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Lukas Burkhardt
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Ayla Päpcke
- Institute of Physics and Department of Life, Light and MatterUniversity of Rostock 18051 Rostock Germany
| | - Johannes Moll
- Institute of Inorganic Chemistry and Analytical ChemistryJohannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Peter Zimmer
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Roland Schoch
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Christoph Wölper
- Institute for Inorganic Chemistry and Center for Nanointegration, Duisburg-Essen (Cenide)University of Duisburg-Essen Universitätsstraße 5-7 45117 Essen Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical ChemistryJohannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Stefan Lochbrunner
- Institute of Physics and Department of Life, Light and MatterUniversity of Rostock 18051 Rostock Germany
| | - Matthias Bauer
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| |
Collapse
|
42
|
Gregori BJ, Schwarzhuber F, Pöllath S, Zweck J, Fritsch L, Schoch R, Bauer M, Jacobi von Wangelin A. Stereoselective Alkyne Hydrogenation by using a Simple Iron Catalyst. ChemSusChem 2019; 12:3864-3870. [PMID: 31265757 DOI: 10.1002/cssc.201900926] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/04/2019] [Indexed: 06/09/2023]
Abstract
The stereoselective hydrogenation of alkynes constitutes one of the key approaches for the construction of stereodefined alkenes. The majority of conventional methods utilize noble and toxic metal catalysts. This study concerns a simple catalyst comprised of the commercial chemicals iron(II) acetylacetonate and diisobutylaluminum hydride, which enables the Z-selective semihydrogenation of alkynes under near ambient conditions (1-3 bar H2 , 30 °C, 5 mol % [Fe]). Neither an elaborate catalyst preparation nor addition of ligands is required. Mechanistic studies (kinetic poisoning, X-ray absorption spectroscopy, TEM) strongly indicate the operation of small iron clusters and particle catalysts.
Collapse
Affiliation(s)
- Bernhard J Gregori
- Dept. of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146, Hamburg, Germany
| | - Felix Schwarzhuber
- Dept. of Physics, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Simon Pöllath
- Dept. of Physics, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Josef Zweck
- Dept. of Physics, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Lorena Fritsch
- Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), University of Paderborn, Warburger Straße 100, 33098, Paderborn, Germany
| | - Roland Schoch
- Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), University of Paderborn, Warburger Straße 100, 33098, Paderborn, Germany
| | - Matthias Bauer
- Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), University of Paderborn, Warburger Straße 100, 33098, Paderborn, Germany
| | | |
Collapse
|
43
|
Kreft S, Schoch R, Schneidewind J, Rabeah J, Kondratenko EV, Kondratenko VA, Junge H, Bauer M, Wohlrab S, Beller M. Improving Selectivity and Activity of CO2 Reduction Photocatalysts with Oxygen. Chem 2019. [DOI: 10.1016/j.chempr.2019.07.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
44
|
Kreft S, Schoch R, Schneidewind J, Rabeah J, Kondratenko EV, Kondratenko VA, Junge H, Bauer M, Wohlrab S, Beller M. Improving Selectivity and Activity of CO2 Reduction Photocatalysts with Oxygen. Chem 2019. [DOI: 10.1016/j.chempr.2019.04.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
45
|
Steube J, Burkhardt L, Päpcke A, Moll J, Zimmer P, Schoch R, Wölper C, Heinze K, Lochbrunner S, Bauer M. Excited‐State Kinetics of an Air‐Stable Cyclometalated Iron(II) Complex. Chemistry 2019; 25:11826-11830. [DOI: 10.1002/chem.201902488] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Jakob Steube
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Lukas Burkhardt
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Ayla Päpcke
- Institute of Physics and Department of Life, Light and MatterUniversity of Rostock 18051 Rostock Germany
| | - Johannes Moll
- Institute of Inorganic Chemistry and Analytical ChemistryJohannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Peter Zimmer
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Roland Schoch
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Christoph Wölper
- Institute for Inorganic Chemistry and Center for Nanointegration, Duisburg-Essen (Cenide)University of Duisburg-Essen Universitätsstraße 5-7 45117 Essen Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical ChemistryJohannes Gutenberg University Duesbergweg 10–14 55128 Mainz Germany
| | - Stefan Lochbrunner
- Institute of Physics and Department of Life, Light and MatterUniversity of Rostock 18051 Rostock Germany
| | - Matthias Bauer
- Institute of Inorganic Chemistry and Center for Sustainable, Systems Design (CSSD)University of Paderborn Warburger Straße 100 33098 Paderborn Germany
| |
Collapse
|
46
|
Baltrun M, Watt FA, Schoch R, Wölper C, Neuba AG, Hohloch S. A new bis-phenolate mesoionic carbene ligand for early transition metal chemistry. Dalton Trans 2019; 48:14611-14625. [DOI: 10.1039/c9dt03099a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A new chelating mesoionic carbene ligand, derived from 1,2,3-triazoles, with two redox-active tert-butyl-phenolate linkers has been synthesized and explored towards its reactivity and electrochemical properties in early transition metal chemistry.
Collapse
Affiliation(s)
- Marc Baltrun
- Universität Paderborn
- Fakultät für Naturwissenschaften
- Department Chemie Warburger Straße 100
- 33098 Paderborn
- Germany
| | - Fabian A. Watt
- Universität Paderborn
- Fakultät für Naturwissenschaften
- Department Chemie Warburger Straße 100
- 33098 Paderborn
- Germany
| | - Roland Schoch
- Universität Paderborn
- Fakultät für Naturwissenschaften
- Department Chemie Warburger Straße 100
- 33098 Paderborn
- Germany
| | | | - Adam G. Neuba
- Universität Paderborn
- Fakultät für Naturwissenschaften
- Department Chemie Warburger Straße 100
- 33098 Paderborn
- Germany
| | - Stephan Hohloch
- Universität Paderborn
- Fakultät für Naturwissenschaften
- Department Chemie Warburger Straße 100
- 33098 Paderborn
- Germany
| |
Collapse
|
47
|
Zimmer P, Burkhardt L, Schepper R, Zheng K, Gosztola D, Neuba A, Flörke U, Wölper C, Schoch R, Gawelda W, Canton SE, Bauer M. Towards Noble-Metal-Free Dyads: Ground and Excited State Tuning by a Cobalt Dimethylglyoxime Motif Connected to an Iron N-Heterocyclic Carbene Photosensitizer. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800946] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Peter Zimmer
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| | - Lukas Burkhardt
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| | - Rahel Schepper
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| | - Kaibo Zheng
- Department of Chemistry; Technical University of Denmark; -2800 Kongens Lyngby Denmark
- Department of Chemical Physics and NanoLund; Lund University; Box 124 22100 Lund Sweden
| | - David Gosztola
- Argonne National Laboratory; Center for Nanoscale Materials; 9700 S. Cass Avenue 60439 Lemont, Illinois United States
| | - Adam Neuba
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| | - Ulrich Flörke
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| | - Christoph Wölper
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide); University of Duisburg-Essen; Universitätsstraße 5-7 -45117 Essen Germany
| | - Roland Schoch
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| | - Wojciech Gawelda
- European XFEL, Holzkoppel 4; 22869 Schenefeld Germany
- Faculty of Physics; Adam Mickiewicz University, Umultowska 85, 61-614 Poznań; Poland
| | - Sophie E. Canton
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics ter 13, Szeged 6720, Hungary & Attosecond Science Group, Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85; Germany
| | - Matthias Bauer
- Faculty of science; Paderborn University; Warburger Straße 100 33098 Paderborn Germany
| |
Collapse
|
48
|
Fischer S, Rösel A, Kammer A, Barsch E, Schoch R, Junge H, Bauer M, Beller M, Ludwig R. Cover Feature: Diferrate [Fe 2
(CO) 6
(μ-CO){μ-P(aryl) 2
}] −
as Self-Assembling Iron/Phosphor-Based Catalyst for the Hydrogen Evolution Reaction in Photocatalytic Proton Reduction-Spectroscopic Insights (Chem. Eur. J. 60/2018). Chemistry 2018. [DOI: 10.1002/chem.201804531] [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)
- Steffen Fischer
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
- Department of Life, Light & Matter; University of Rostock; Albert-Einstein-Straße 25 18059 Rostock Germany
| | - Arend Rösel
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - Anja Kammer
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Enrico Barsch
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - Roland Schoch
- Department Chemie; Fakultät Naturwissenschaften; Paderborn University; Warburger Str. 100 33098 Paderborn Germany
| | - Henrik Junge
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Bauer
- Department Chemie; Fakultät Naturwissenschaften; Paderborn University; Warburger Str. 100 33098 Paderborn Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Ralf Ludwig
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
- Department of Life, Light & Matter; University of Rostock; Albert-Einstein-Straße 25 18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| |
Collapse
|
49
|
Fischer S, Rösel A, Kammer A, Barsch E, Schoch R, Junge H, Bauer M, Beller M, Ludwig R. Diferrate [Fe2
(CO)6
(μ-CO){μ-P(aryl)2
}]−
as Self-Assembling Iron/Phosphor-Based Catalyst for the Hydrogen Evolution Reaction in Photocatalytic Proton Reduction-Spectroscopic Insights. Chemistry 2018; 24:16052-16065. [DOI: 10.1002/chem.201802694] [Citation(s) in RCA: 6] [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] [Received: 05/28/2018] [Indexed: 01/07/2023]
Affiliation(s)
- Steffen Fischer
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
- Department of Life, Light & Matter; University of Rostock; Albert-Einstein-Straße 25 18059 Rostock Germany
| | - Arend Rösel
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - Anja Kammer
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Enrico Barsch
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
| | - Roland Schoch
- Department Chemie; Fakultät Naturwissenschaften; Paderborn University; Warburger Str. 100 33098 Paderborn Germany
| | - Henrik Junge
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Bauer
- Department Chemie; Fakultät Naturwissenschaften; Paderborn University; Warburger Str. 100 33098 Paderborn Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Ralf Ludwig
- Physical and Theoretical Chemistry Department; University of Rostock; Dr.-Lorenz-Weg 2 18059 Rostock Germany
- Department of Life, Light & Matter; University of Rostock; Albert-Einstein-Straße 25 18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock); Albert-Einstein-Straße 29a 18059 Rostock Germany
| |
Collapse
|
50
|
Naumova M, Khakhulin D, Rebarz M, Rohrmüller M, Dicke B, Biednov M, Britz A, Espinoza S, Grimm-Lebsanft B, Kloz M, Kretzschmar N, Neuba A, Ortmeyer J, Schoch R, Andreasson J, Bauer M, Bressler C, Gero Schmidt W, Henkel G, Rübhausen M. Structural dynamics upon photoexcitation-induced charge transfer in a dicopper(i)–disulfide complex. Phys Chem Chem Phys 2018; 20:6274-6286. [DOI: 10.1039/c7cp04880g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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
A study of structural evolution upon photoinduced charge transfer in a dicopper complex with biologically relevant sulfur coordination.
Collapse
|