1
|
Skavenborg ML, Møller MS, Mossin S, Waite TD, McKenzie CJ. Sulfonamido-Pincer Complexes of Cu(II) and the Electrocatalysis of O 2 Reduction. Inorg Chem 2023; 62:12741-12749. [PMID: 37535840 DOI: 10.1021/acs.inorgchem.3c01262] [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: 08/05/2023]
Abstract
Heteroleptic copper complexes of an asymmetrical pincer ligand containing a central anionic sulfonamide donor (pyridine-2-yl-sulfonyl)(quinolin-8-yl)-amide (psq), which contains a central anionic sulfonamido donor have been prepared. Meridional κ3-N,N″,N‴ binding with the co-ligands acetate, chloride, or acetonitrile (MeCN), trans to the central sulfonamido N-donor, is revealed by the X-ray crystal structures of [Cu(OAc)(psq)(H2O)], [CuCl(psq)]2, and [Cu(psq)(MeCN)](PF6). Either overall distorted square pyramidal or octahedral geometries of the copper atom are satisfied by coordinated water in the case of the acetate complex or interactions with periphery sulfonamido oxygen atoms on adjacent molecules in the dimeric chloride and 1D polymeric acetonitrile complexes. The cyclic voltammogram (CV) of [Cu(OAc)(psq)(H2O)] shows a quasi-reversible CuII/CuI reduction at -0.930 V (vs Fc+/Fc0, MeCN), and an irreversible CuII/CuI reduction for [Cu(psq)(MeCN)](PF6) is seen at -0.838 V. This signal is split into two quasi-reversible redox processes on the addition of 2,2,2-trifluoroethanol (TFE). This suggests that TFE pushes a solution equilibrium toward a dimeric acetate complex analogous to [CuCl(psq)]2, which shows two quasi-reversible waves at -0.666 V and -0.904 V vs Fc+/Fc0 consistent with its dimeric solid-state structure. A comparison of the CVs of [Cu(OAc)(psq)(H2O)] under either a N2 or an O2 atmosphere revealed that this complex catalyzes turnover electro-reduction of O2 to H2O2 and H2O. The rate of reaction increases on addition of a weak organic acid, and a coulombic efficiency of 48% for H2O2 was determined by iodometric titration. We propose that a CuI complex formed on electroreduction binds O2 to yield an intermediate superoxide complex. On electron and proton transfer to this species, a bifurcated route back to the O2-activating CuI complex is feasible with either release of H2O2 or O-O cleavage resulting in the liberation of H2O. The CuI complex is regenerated by subsequent reduction and protonation to close the cycle.
Collapse
Affiliation(s)
- Mathias L Skavenborg
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
- Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Mads Sondrup Møller
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, 2800 Kgs Lyngby, Denmark
| | - T David Waite
- Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Christine J McKenzie
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
| |
Collapse
|
2
|
Balakrishna B, Mossin S, Kramer S. Photo-induced metal-free dehydrogenative N-N homo-coupling. Chem Commun (Camb) 2022; 58:10977-10980. [PMID: 36093722 DOI: 10.1039/d2cc04204e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a photo-induced dehydrogenative N-N coupling of diarylimines, diarylamines, carbazoles, and anilines. These homo-coupling reactions require only the combination of readily available di-tert-butyl peroxide (DTBP) and light irradition. The operationally simple protocol works under catalyst- and metal-free conditions and exhibits a good substrate scope. Preliminary mechanistic studies indicate that the reaction proceeds via photo-induced homolytic cleavage of the peroxide followed by hydrogen atom transfer leading to the formation of N-centered radicals.
Collapse
Affiliation(s)
- Bugga Balakrishna
- Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.
| | - Søren Kramer
- Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.
| |
Collapse
|
3
|
Mortensen RL, Noack HD, Pedersen K, Mossin S, Mielby J. Recent advances in complete methane oxidation using zeolite‐supported metal nanoparticle catalysts. ChemCatChem 2022. [DOI: 10.1002/cctc.202101924] [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)
- Rasmus Lykke Mortensen
- Technical University of Denmark: Danmarks Tekniske Universitet DTU Chemistry Kemitorvet 207 DK-2800 Kgs. Lyngby DENMARK
| | - Hendrik-David Noack
- Umicore Denmark ApS Stationary Catalysts Kogle Allé 1 DK-2970 Hørsholm DENMARK
| | - Kim Pedersen
- Umicore Denmark ApS Stationary Catalysts Kogle Allé 1 DK-2970 Hørsholm DENMARK
| | - Susanne Mossin
- Technical University of Denmark: Danmarks Tekniske Universitet DTU Chemistry DK-2800 Kgs. Lyngby DENMARK
| | - Jerrik Mielby
- Technical University of Denmark DTU Chemistry Kemitorvet 207 DK-2800 Kgs. Lyngby DENMARK
| |
Collapse
|
4
|
Chen H, Voigt L, Kubus M, Mihrin D, Mossin S, Larsen RW, Kegnæs S, Piligkos S, Pedersen KS. Magnetic Archimedean Tessellations in Metal-Organic Frameworks. J Am Chem Soc 2021; 143:14041-14045. [PMID: 34374526 DOI: 10.1021/jacs.1c05057] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The self-assembly of lanthanide ions with ditopic organic spacers results in the formation of complex tiling patterns that mimic the structural motifs of quasi-periodic 2D materials. The linking of trans-{LnI2}+ nodes (Ln = Gd, Dy) by both closed-shell and anion radicals of 4,4'-bipyridine affords rare examples of Archimedean tessellations in a metal-organic framework. We furthermore demonstrate the occurrence of sizable magnetic exchange interactions and slow relaxation of magnetization behavior in a complex tessellation pattern. The implementation of Archimedean tessellations in lanthanide(III) coordination solids couriers a strategy to design elusive quasi-periodic metal-organic frameworks with inimitable magnetic properties.
Collapse
Affiliation(s)
- Hua Chen
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Laura Voigt
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Mariusz Kubus
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Dmytro Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - René W Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Søren Kegnæs
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Stergios Piligkos
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Kasper S Pedersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| |
Collapse
|
5
|
Cao H, Peng C, Zheng Z, Lan Z, Pan Q, Nielsen UG, Norby P, Xiao X, Mossin S. Orientation effect of zinc vanadate cathode on zinc ion storage performance. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138646] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
6
|
Sanz-Marco A, Hueso JL, Sebastian V, Nielsen D, Mossin S, Holgado JP, Bueno-Alejo CJ, Balas F, Santamaria J. LED-driven controlled deposition of Ni onto TiO 2 for visible-light expanded conversion of carbon dioxide into C 1-C 2 alkanes. Nanoscale Adv 2021; 3:3788-3798. [PMID: 36133006 PMCID: PMC9417592 DOI: 10.1039/d1na00021g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 04/20/2021] [Indexed: 06/15/2023]
Abstract
Photocatalytic gas-phase hydrogenation of CO2 into alkanes was achieved over TiO2-supported Ni nanoparticles under LED irradiation at 365 nm, 460 nm and white light. The photocatalysts were prepared using photo-assisted deposition of Ni salts under LED irradiation at 365 nm onto TiO2 P25 nanoparticles in methanol as a hole scavenger. This procedure yielded 2 nm Ni particles decorating the surface of TiO2 with a nickel mass content of about 2%. Before the photocatalytic runs, Ni/TiO2 was submitted to thermal reduction at 400 °C in a 10% H2 atmosphere which induced O-defective TiO2-x substrates. The formation of oxygen vacancies, Ti3+ centers and metallic Ni sites upon photocatalytic CO2 hydrogenation was confirmed by operando EPR analysis. In situ XPS under reaction conditions suggested a strong metal-support interaction and the co-existence of zero and divalent Ni states. These photoactive species enhanced the photo-assisted reduction of CO2 below 300 °C to yield CO, CH4 and C2H6 as final products.
Collapse
Affiliation(s)
- Arturo Sanz-Marco
- Department of Chemical and Environmental Engineering, University of Zaragoza c/Mariano Esquillor, s/n; Campus Rio Ebro, Edificio I+D Zaragoza 50018 Spain
- Institute of Nanoscience and Materials of Aragon (INMA), University of Zaragoza, Consejo Superior de Investigaciones Científicas (CSIC) c/Mariano Esquillor, s/n 50018 Zaragoza Spain
| | - José L Hueso
- Department of Chemical and Environmental Engineering, University of Zaragoza c/Mariano Esquillor, s/n; Campus Rio Ebro, Edificio I+D Zaragoza 50018 Spain
- Institute of Nanoscience and Materials of Aragon (INMA), University of Zaragoza, Consejo Superior de Investigaciones Científicas (CSIC) c/Mariano Esquillor, s/n 50018 Zaragoza Spain
- Networking Research Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN) C/Monforte de Lemos, 3-5 28029 Madrid Spain
| | - Víctor Sebastian
- Department of Chemical and Environmental Engineering, University of Zaragoza c/Mariano Esquillor, s/n; Campus Rio Ebro, Edificio I+D Zaragoza 50018 Spain
- Institute of Nanoscience and Materials of Aragon (INMA), University of Zaragoza, Consejo Superior de Investigaciones Científicas (CSIC) c/Mariano Esquillor, s/n 50018 Zaragoza Spain
- Networking Research Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN) C/Monforte de Lemos, 3-5 28029 Madrid Spain
| | - David Nielsen
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark Kemitorvet 207 2800 Kgs. Lyngby Denmark
| | - Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark Kemitorvet 207 2800 Kgs. Lyngby Denmark
| | - Juan P Holgado
- Instituto de Ciencia de Materiales de Sevilla (ICMS, CSIC-University of Seville) Avda. Americo Vespucio, s/n Seville 41092 Spain
| | - Carlos J Bueno-Alejo
- Department of Chemical and Environmental Engineering, University of Zaragoza c/Mariano Esquillor, s/n; Campus Rio Ebro, Edificio I+D Zaragoza 50018 Spain
- Institute of Nanoscience and Materials of Aragon (INMA), University of Zaragoza, Consejo Superior de Investigaciones Científicas (CSIC) c/Mariano Esquillor, s/n 50018 Zaragoza Spain
| | - Francisco Balas
- Department of Chemical and Environmental Engineering, University of Zaragoza c/Mariano Esquillor, s/n; Campus Rio Ebro, Edificio I+D Zaragoza 50018 Spain
- Institute of Nanoscience and Materials of Aragon (INMA), University of Zaragoza, Consejo Superior de Investigaciones Científicas (CSIC) c/Mariano Esquillor, s/n 50018 Zaragoza Spain
- Networking Research Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN) C/Monforte de Lemos, 3-5 28029 Madrid Spain
| | - Jesus Santamaria
- Department of Chemical and Environmental Engineering, University of Zaragoza c/Mariano Esquillor, s/n; Campus Rio Ebro, Edificio I+D Zaragoza 50018 Spain
- Institute of Nanoscience and Materials of Aragon (INMA), University of Zaragoza, Consejo Superior de Investigaciones Científicas (CSIC) c/Mariano Esquillor, s/n 50018 Zaragoza Spain
- Networking Research Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN) C/Monforte de Lemos, 3-5 28029 Madrid Spain
| |
Collapse
|
7
|
Cao H, Zheng Z, Norby P, Xiao X, Mossin S. Electrochemically Induced Phase Transition in V 3 O 7 · H 2 O Nanobelts/Reduced Graphene Oxide Composites for Aqueous Zinc-Ion Batteries. Small 2021; 17:e2100558. [PMID: 33978319 DOI: 10.1002/smll.202100558] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 04/06/2021] [Indexed: 06/12/2023]
Abstract
V3 O7 ·H2 O nanobelts/reduced graphene oxide (rGO) composites (weight ratio: 86%/14%) are synthesized by a microwave approach with a high yield (85%) through controlling pH with acids. The growth mechanisms of the highly crystalline nanobelts (average diameter: 25 nm; length: ≈20 µm; oriented along the [101] direction) have been thoroughly investigated, with the governing role of the acid upon the morphology and oxidation state of vanadium disclosed. When used as the ZIB cathode, the composite can deliver a high specific capacity of 410.7 and 385.7 mAh g-1 at the current density of 0.5 and 4 A g-1 , respectively, with a high retention of the capacity of 93%. The capacity of the composite is greater than those of V3 O7 · H2 O, V2 O5 nanobelts, and V5 O12 · 6H2 O film. Zinc ion storage in V3 O7 ·H2 O/rGO is mainly a pseudocapacitive behavior rather than ion diffusion. The presence of rGO enables outstanding cycling stability of up to 1000 cycles with a capacity retention of 99.6%. Extended cycling shows a gradual phase transition, that is, from the original orthorhombic V3 O7 · H2 O to a stable hexagonal Zn3 (VO4 )2 (H2 O)2.93 phase, which is a new electrochemical route found in V3 O7 materials. This phase transition process provides new insight into the reactions of aqueous ZIBs.
Collapse
Affiliation(s)
- Huili Cao
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Zhiyong Zheng
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Poul Norby
- Department of Energy Conversion and Storage, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Xinxin Xiao
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| |
Collapse
|
8
|
Cao H, Zheng Z, Meng J, Xiao X, Norby P, Mossin S. Examining the effects of nitrogen-doped carbon coating on zinc vanadate nanoflowers towards high performance lithium anode. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136791] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
9
|
Brander S, Horvath I, Ipsen JØ, Peciulyte A, Olsson L, Hernández-Rollán C, Nørholm MHH, Mossin S, Leggio LL, Probst C, Thiele DJ, Johansen KS. Biochemical evidence of both copper chelation and oxygenase activity at the histidine brace. Sci Rep 2020; 10:16369. [PMID: 33004835 PMCID: PMC7529816 DOI: 10.1038/s41598-020-73266-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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: 06/26/2020] [Accepted: 09/15/2020] [Indexed: 12/22/2022] Open
Abstract
Lytic polysaccharide monooxygenase (LPMO) and copper binding protein CopC share a similar mononuclear copper site. This site is defined by an N-terminal histidine and a second internal histidine side chain in a configuration called the histidine brace. To understand better the determinants of reactivity, the biochemical and structural properties of a well-described cellulose-specific LPMO from Thermoascus aurantiacus (TaAA9A) is compared with that of CopC from Pseudomonas fluorescens (PfCopC) and with the LPMO-like protein Bim1 from Cryptococcus neoformans. PfCopC is not reduced by ascorbate but is a very strong Cu(II) chelator due to residues that interacts with the N-terminus. This first biochemical characterization of Bim1 shows that it is not redox active, but very sensitive to H2O2, which accelerates the release of Cu ions from the protein. TaAA9A oxidizes ascorbate at a rate similar to free copper but through a mechanism that produce fewer reactive oxygen species. These three biologically relevant examples emphasize the diversity in how the proteinaceous environment control reactivity of Cu with O2.
Collapse
Affiliation(s)
- Søren Brander
- Department of Geoscience and Natural Resource Management, University of Copenhagen, 1958, Frederiksberg, Denmark
| | - Istvan Horvath
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96, Gothenburg, Sweden
| | - Johan Ø Ipsen
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg, Denmark
| | - Ausra Peciulyte
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96, Gothenburg, Sweden
| | - Lisbeth Olsson
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96, Gothenburg, Sweden
| | - Cristina Hernández-Rollán
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
| | - Morten H H Nørholm
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
| | - Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
| | - Leila Lo Leggio
- Department of Chemistry, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Corinna Probst
- Department of Biochemistry, Pharmacology and Cancer Biology and Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Dennis J Thiele
- Department of Biochemistry, Pharmacology and Cancer Biology and Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Katja S Johansen
- Department of Geoscience and Natural Resource Management, University of Copenhagen, 1958, Frederiksberg, Denmark. .,Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96, Gothenburg, Sweden.
| |
Collapse
|
10
|
Affiliation(s)
| | - Marie H. Funk
- Centre for Catalysis and Sustainable Chemistry DTU Chemistry Technical University of Denmark Kemitorvet 207 2800 Kgs. Lyngby Denmark
| | | | - Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry DTU Chemistry Technical University of Denmark Kemitorvet 207 2800 Kgs. Lyngby Denmark
| |
Collapse
|
11
|
Meng J, Lan Z, Abdellah M, Yang B, Mossin S, Liang M, Naumova M, Shi Q, Gutierrez Alvarez SL, Liu Y, Lin W, Castelli IE, Canton SE, Pullerits T, Zheng K. Modulating Charge-Carrier Dynamics in Mn-Doped All-Inorganic Halide Perovskite Quantum Dots through the Doping-Induced Deep Trap States. J Phys Chem Lett 2020; 11:3705-3711. [PMID: 32329350 DOI: 10.1021/acs.jpclett.0c01050] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transition-metal ion doping has been demonstrated to be effective for tuning the photoluminescence properties of perovskite quantum dots (QDs). However, it would inevitably introduce defects in the lattice. As the Mn concentration increases, the Mn dopant photoluminescence quantum yield (PLQY) first increases and then decreases. Herein the influence of the dopant and the defect states on the photophysics in Mn-doped CsPbCl3 QDs was studied by time-resolved spectroscopies, whereas the energy levels of the possible defect states were analyzed by density functional theory calculations. We reveal the formation of deep interstitials defects (Cli) by Mn2+ doping. The depopulation of initial QD exciton states is a competition between exciton-dopant energy transfer and defect trapping on an early time scale (<100 ps), which determines the final PLQY of the QDs. The present work establishes a robust material optimization guideline for all of the emerging applications where a high PLQY is essential.
Collapse
Affiliation(s)
- Jie Meng
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Zhenyun Lan
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Mohamed Abdellah
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
- Department of Chemistry, Qena Faculty of Science, South Valley University, 83523 Qena, Egypt
| | - Bin Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Mingli Liang
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Maria Naumova
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Qi Shi
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| | | | - Yang Liu
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
- The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Weihua Lin
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| | - Ivano E Castelli
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Sophie E Canton
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics ter 13, Szeged 6720, Hungary
| | - Tönu Pullerits
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| | - Kaibo Zheng
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| |
Collapse
|
12
|
Yao L, Liu Q, Mossin S, Nielsen D, Kong M, Jiang L, Yang J, Ren S, Wen J. Promotional effects of nitrogen doping on catalytic performance over manganese-containing semi-coke catalysts for the NH 3-SCR at low temperatures. J Hazard Mater 2020; 387:121704. [PMID: 31780294 DOI: 10.1016/j.jhazmat.2019.121704] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 06/10/2023]
Abstract
A series of nitrogen-doped MnOx/semi-coke catalysts were studied for low-temperature (LT) de-NOx performance in the NH3-SCR reaction. Changes in morphology, structure, and surface chemistry of the semi-coke catalysts were systematically investigated to analyze the promotional effects of nitrogen doping on catalytic performance. The catalytic activity of ASC-10U10 Mn was found to be enhanced significantly in a broad temperature range of 100-300 °C, improving 44.2 % at 150 °C-the largest jump in this temperature range-and reaching 94.5 % at 275 °C. Nitrogen doping results in aromatic pyridinic-N, pyrrolic-N, and quaternary-N; the unpaired electrons on these groups play a critical role in enhancing the adsorption and oxidation of NO. NH3 adsorption is enhanced due to numerous diverse Lewis acid sites on ASC-10U10 Mn. The electron distribution of MnOx/semi-coke catalysts and the electron mobility between manganese and oxygen species are improved by nitrogen doping. The resulting nitrate intermediates, especially bridging nitrates, can be reduced by NH3 species at low temperatures. The increase in the number of oxygen vacancies improves oxidation of coordinated NH3. In addition, DRIFTS results suggest that coordinated NH3 and intermediate -NH2 are much more active and make a considerable positive contribution to the LT SCR reaction.
Collapse
Affiliation(s)
- Lu Yao
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark
| | - Qingcai Liu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark.
| | - David Nielsen
- Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark
| | - Ming Kong
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Department of Chemistry, Technical University of Denmark, Lyngby, 2800, Denmark
| | - Lijun Jiang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Jie Yang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
| | - Shan Ren
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
| | - Juan Wen
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Chongqing Cheng Tou Road and Bridge Administration Co. Ltd, Chongqing, 400060, China
| |
Collapse
|
13
|
Refn V, Kubus M, Mossin S, Larsen RW, Pedersen KS. A Redox-Innocent Uranium(IV)-Quinoid Metal-Organic Framework. ACS Omega 2020; 5:3462-3466. [PMID: 32118160 PMCID: PMC7045569 DOI: 10.1021/acsomega.9b03727] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Quinoid-based ligands constitute the most common class of redox-active ligands used to construct electrically conductive and magnetic metal-organic frameworks (MOFs). Whereas this chemistry is intensively explored for transition-metal and lanthanide ions, any related actinide compound has not received attention. In particular, the MOF chemistry of actinide ions in the lower oxidation states is underexplored. We herein report the synthesis, and structural and physical property characterization of a uranium(IV) quinoid-based MOF, [U(Cl2dhbq)2(H2O)2]·4H2O (1, Cl2dhbq2- = deprotonated 2,5-dichloro-3,6-dihydroxybenzoquinone). 1 is a rare example of a U(IV)-based coordination solid and the first material to incorporate bona fide reducible bridging ligands. Despite the anticipated thermodynamic driving force, no indications of valence tautomerism are evident from magnetometry, near-IR spectroscopy, and X-band electron paramagnetic resonance measurements. These initial results suggest that reduction potentials alone are insufficient as guidelines for the prediction of the occurrence of electron transfer in uranium-quinoid-based materials.
Collapse
|
14
|
Bukowski A, Schill L, Nielsen D, Mossin S, Riisager A, Albert J. NH3-SCR of NO with novel active, supported vanadium-containing Keggin-type heteropolyacid catalysts. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00033g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supported vanadium-substituted Keggin polyoxometalates (POMs) were applied as catalysts for the selective catalytic reduction of NO using NH3 as reductant (NH3-SCR).
Collapse
Affiliation(s)
- Anna Bukowski
- Lehrstuhl für Chemische Reaktionstechnik
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| | - Leonhard Schill
- Technical University of Denmark
- Department of Chemistry
- Centre for Catalysis and Sustainable Chemistry
- 2800 Kgs. Lyngby
- Denmark
| | - David Nielsen
- Technical University of Denmark
- Department of Chemistry
- Centre for Catalysis and Sustainable Chemistry
- 2800 Kgs. Lyngby
- Denmark
| | - Susanne Mossin
- Technical University of Denmark
- Department of Chemistry
- Centre for Catalysis and Sustainable Chemistry
- 2800 Kgs. Lyngby
- Denmark
| | - Anders Riisager
- Technical University of Denmark
- Department of Chemistry
- Centre for Catalysis and Sustainable Chemistry
- 2800 Kgs. Lyngby
- Denmark
| | - Jakob Albert
- Lehrstuhl für Chemische Reaktionstechnik
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| |
Collapse
|
15
|
Santiago R, Mossin S, Bedia J, Fehrmann R, Palomar J. Methanol-Promoted Oxidation of Nitrogen Oxide (NO x) by Encapsulated Ionic Liquids. Environ Sci Technol 2019; 53:11969-11978. [PMID: 31518126 DOI: 10.1021/acs.est.9b03103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The removal of nitrogen oxides (NOx) has been extensively studied due to their harmful effects to health and environment. In this work, encapsulated ionic liquids (ENILs) are used as catalysts for the NO oxidation at humid conditions and low temperatures. Hollow carbon capsules (CCap) were first synthesized to contain different amounts of 1-butyl-3-methylimidazolium nitrate IL ([bmim][NO3]), responsible for the catalytic oxidation. Then, the materials were characterized using different techniques, by analyzing microstructure, porosity, elemental composition, and thermal stability. The catalytic performance of ENIL materials was tested for NO conversion at different conditions. Thus, NO concentration was fixed at 2000 ppm at dry and humid conditions. Then, the methanol promotion of the reaction was demonstrated, increasing the NO conversion values in all cases, and the alcohol/water ratio was optimized. The temperature effect was studied as well, using the optimal conditions based on the previous measurements. The results reflect that humid conditions do not have a negative effect in terms of NO conversion when using ENILs, opposite behavior as observed for CCap and traditional catalysts studied before. The low amount of IL inside the material (40% in mass) was found to be the optimum for the task, reaching conversions of almost 45% in near industrial conditions of temperature and O2 and H2O concentrations in the flue gas with a GHSV of 10,000 h-1.
Collapse
Affiliation(s)
- Ruben Santiago
- Chemical Engineering Department , Universidad Autónoma de Madrid , 28049 Madrid , Spain
| | - Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry , Technical University of Denmark , DK-2800 Kongens Lyngby , Denmark
| | - Jorge Bedia
- Chemical Engineering Department , Universidad Autónoma de Madrid , 28049 Madrid , Spain
| | - Rasmus Fehrmann
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry , Technical University of Denmark , DK-2800 Kongens Lyngby , Denmark
| | - José Palomar
- Chemical Engineering Department , Universidad Autónoma de Madrid , 28049 Madrid , Spain
| |
Collapse
|
16
|
Wegeberg C, Nielsen D, Mossin S, Abrahams BF, McKee V, McKenzie CJ. Reversible and Vapochromic Chemisorption of Ammonia by a Copper(II) Coordination Polymer. Aust J Chem 2019. [DOI: 10.1071/ch19264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The single crystal X-ray structure determination of {[Cu(tpt)(o-phthalate)]·31/3(C2H2Cl4)}n (tpt=2,4,6-tri-4-pyridyl-1,3,5-triazine, C2H2Cl4=1,1,2,2-tetrachloroethane=TCE) shows a 3D network in which CuII centres are linked by 3-connecting tpt ligands with the topology of a 12,3 net. CuII centres are further linked by o-phthalate dianions. The copper coordination geometry is square pyramidal, with o-phthalate oxygen donors trans to each other in the basal plane and the remaining positions taken by the pyridines of three linking tpt units. The solvent accessible void space is ~65%. The pale blue-green crystalline desolvate, obtained by heating to 200°C or washing the TCE solvate with acetone is formulated as [Cu(tpt)(o-phthalate)]n. Powder X-ray diffraction and electron paramagnetic resonance spectroscopy show that the crystal structure and the CuII geometry changes upon desolvation. The crystalline desolvated phase sorbs two equivalents of ammonia per copper ion. The adduct, mauve [Cu(tpt)(o-phthalate)(NH3)2]n, shows reasonable crystallinity and is stable up to ~150°C under ambient conditions before the reversible desorption (minimum 10 cycles) of the guest ammonia. The colour change and high desorption temperature, along with changes in g values, is suggestive of chemisorption in two steps with Cu–ammine bonding in the loaded phase.
Collapse
|
17
|
Hammershøi PS, Godiksen AL, Mossin S, Vennestrøm PNR, Jensen AD, Janssens TVW. Site selective adsorption and relocation of SOx in deactivation of Cu–CHA catalysts for NH3-SCR. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00275d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
SO2 selectively interacts with Z-CuOH in Cu–CHA catalysts for NH3-SCR and relocates to Z2-Cu during heating at 550 °C.
Collapse
Affiliation(s)
- Peter S. Hammershøi
- Umicore Denmark ApS
- 2800 Kgs. Lyngby
- Denmark
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
| | - Anita L. Godiksen
- Department of Chemistry
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - Susanne Mossin
- Department of Chemistry
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | | | - Anker D. Jensen
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | | |
Collapse
|
18
|
Lamagni P, Pedersen BL, Godiksen A, Mossin S, Hu XM, Pedersen SU, Daasbjerg K, Lock N. Graphene inclusion controlling conductivity and gas sorption of metal-organic framework. RSC Adv 2018; 8:13921-13932. [PMID: 35539320 PMCID: PMC9079844 DOI: 10.1039/c8ra02439a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 04/02/2018] [Indexed: 12/16/2022] Open
Abstract
A general approach to prepare composite films of metal-organic frameworks and graphene has been developed. Films of copper(ii)-based HKUST-1 and HKUST-1/graphene composites were grown solvothermally on glassy carbon electrodes. The films were chemically tethered to the substrate by diazonium electrografting resulting in a large electrode coverage and good stability in solution for electrochemical studies. HKUST-1 has poor electrical conductivity, but we demonstrate that the addition of graphene to HKUST-1 partially restores the electrochemical activity of the electrodes. The enhanced activity, however, does not result in copper(ii) to copper(i) reduction in HKUST-1 at negative potentials. The materials were characterised in-depth: microscopy and grazing incidence X-ray diffraction demonstrate uniform films of crystalline HKUST-1, and Raman spectroscopy reveals that graphene is homogeneously distributed in the films. Gas sorption studies show that both HKUST-1 and HKUST-1/graphene have a large CO2/N2 selectivity, but the composite has a lower surface area and CO2 adsorption capacity in comparison with HKUST-1, while CO2 binds stronger to the composite at low pressures. Electron paramagnetic resonance spectroscopy reveals that both monomeric and dimeric copper units are present in the materials, and that the two materials behave differently upon hydration, i.e. HKUST-1/graphene reacts slower by interaction with water. The changed gas/vapour sorption properties and the improved electrochemical activity are two independent consequences of combining graphene with HKUST-1.
Collapse
Affiliation(s)
- Paolo Lamagni
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (iNANO) and Dept. of Chemistry, Aarhus University Gustav Wieds Vej 14 DK-8000 Aarhus C Denmark
| | - Birgitte Lodberg Pedersen
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (iNANO) and Dept. of Chemistry, Aarhus University Gustav Wieds Vej 14 DK-8000 Aarhus C Denmark
| | - Anita Godiksen
- Dept. of Chemistry, Technical University of Denmark Kemitorvet, DK-2800 Kgs. Lyngby Denmark
| | - Susanne Mossin
- Dept. of Chemistry, Technical University of Denmark Kemitorvet, DK-2800 Kgs. Lyngby Denmark
| | - Xin-Ming Hu
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (iNANO) and Dept. of Chemistry, Aarhus University Gustav Wieds Vej 14 DK-8000 Aarhus C Denmark
| | - Steen Uttrup Pedersen
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (iNANO) and Dept. of Chemistry, Aarhus University Gustav Wieds Vej 14 DK-8000 Aarhus C Denmark
| | - Kim Daasbjerg
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (iNANO) and Dept. of Chemistry, Aarhus University Gustav Wieds Vej 14 DK-8000 Aarhus C Denmark
| | - Nina Lock
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (iNANO) and Dept. of Chemistry, Aarhus University Gustav Wieds Vej 14 DK-8000 Aarhus C Denmark
| |
Collapse
|
19
|
Godiksen A, Isaksen OL, Rasmussen SB, Vennestrøm PNR, Mossin S. Cover Feature: Site-Specific Reactivity of Copper Chabazite Zeolites with Nitric Oxide, Ammonia, and Oxygen (ChemCatChem 2/2018). ChemCatChem 2018. [DOI: 10.1002/cctc.201800007] [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)
- Anita Godiksen
- Department of Chemistry; Technical University of Denmark; Kemitorvet 207 2800 Lyngby Denmark
| | - Oliver L. Isaksen
- Department of Chemistry; Technical University of Denmark; Kemitorvet 207 2800 Lyngby Denmark
| | | | | | - Susanne Mossin
- Department of Chemistry; Technical University of Denmark; Kemitorvet 207 2800 Lyngby Denmark
| |
Collapse
|
20
|
Godiksen A, Isaksen OL, Rasmussen SB, Vennestrøm PNR, Mossin S. Site-Specific Reactivity of Copper Chabazite Zeolites with Nitric Oxide, Ammonia, and Oxygen. ChemCatChem 2017. [DOI: 10.1002/cctc.201701357] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anita Godiksen
- Department of Chemistry; Technical University of Denmark; Kemitorvet 207 2800 Lyngby Denmark
| | - Oliver L. Isaksen
- Department of Chemistry; Technical University of Denmark; Kemitorvet 207 2800 Lyngby Denmark
| | | | | | - Susanne Mossin
- Department of Chemistry; Technical University of Denmark; Kemitorvet 207 2800 Lyngby Denmark
| |
Collapse
|
21
|
Somavarapu AK, Shen F, Teilum K, Zhang J, Mossin S, Thulstrup PW, Bjerrum MJ, Tiwari MK, Szunyogh D, Søtofte PM, Kepp KP, Hemmingsen L. The Pathogenic A2V Mutant Exhibits Distinct Aggregation Kinetics, Metal Site Structure, and Metal Exchange of the Cu 2+ -Aβ Complex. Chemistry 2017; 23:13591-13595. [PMID: 28815875 DOI: 10.1002/chem.201703440] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Indexed: 12/29/2022]
Abstract
A prominent current hypothesis is that impaired metal ion homeostasis may contribute to Alzheimer's disease (AD). We elucidate the interaction of Cu2+ with wild-type (WT) Aβ1-40 and the genetic variants A2T and A2V which display increasing pathogenicity as A2T<WT<A2V. Cu2+ significantly extends the lag phase in aggregation kinetics, in particular for the pathogenic A2V variant. Additionally, a rapid, initial, low intensity ThT response is observed, possibly reflecting formation of Cu2+ induced amorphous aggregates, as supported by atomic force microscopy (AFM) and circular dichroism (CD) spectroscopy, again most notably for the A2V variant. Electron paramagnetic resonance (EPR) spectroscopy gives pKa values for transition between two Cu2+ coordination geometries (component I and II) of 7.4 (A2T), 7.9 (WT), and 8.4 (A2V), that is, component I is stabilized at physiological pH in the order A2T<WT<A2V. 1 H NMR relaxation exhibits the same trend for the non-coordinating aromatic residues (A2T<WT<A2V), and implies markedly faster inter-peptide Cu2+ exchange for the A2V variant than for WT and A2T. We therefore hypothesize that component I of the Cu-Aβ complex is related to pathogenicity, accounting for both the pathogenic nature of the A2V variant and the protective nature of the A2T variant.
Collapse
Affiliation(s)
- Arun K Somavarapu
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark.,Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Fei Shen
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Kaare Teilum
- Structural Biology and NMR Laboratory and the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, 2200, Copenhagen N, Denmark
| | - Jingdong Zhang
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Susanne Mossin
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Peter W Thulstrup
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Morten J Bjerrum
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Manish K Tiwari
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Daniel Szunyogh
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Peter M Søtofte
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Kasper P Kepp
- DTU Chemistry, Technical University of Denmark, 2800 Kongens, Lyngby, Denmark
| | - Lars Hemmingsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| |
Collapse
|
22
|
Godiksen A, Vennestrøm PNR, Rasmussen SB, Mossin S. Identification and Quantification of Copper Sites in Zeolites by Electron Paramagnetic Resonance Spectroscopy. Top Catal 2016. [DOI: 10.1007/s11244-016-0731-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
23
|
Kunov-Kruse AJ, Thomassen PL, Riisager A, Mossin S, Fehrmann R. Absorption and Oxidation of Nitrogen Oxide in Ionic Liquids. Chemistry 2016; 22:11745-55. [DOI: 10.1002/chem.201601166] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Andreas J. Kunov-Kruse
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry; Technical University of Denmark; DK-2800 Kgs. Lyngby Denmark
| | - Peter L. Thomassen
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry; Technical University of Denmark; DK-2800 Kgs. Lyngby Denmark
| | - Anders Riisager
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry; Technical University of Denmark; DK-2800 Kgs. Lyngby Denmark
| | - Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry; Technical University of Denmark; DK-2800 Kgs. Lyngby Denmark
| | - Rasmus Fehrmann
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry; Technical University of Denmark; DK-2800 Kgs. Lyngby Denmark
| |
Collapse
|
24
|
Janssens TVW, Falsig H, Lundegaard LF, Vennestrøm PNR, Rasmussen SB, Moses PG, Giordanino F, Borfecchia E, Lomachenko KA, Lamberti C, Bordiga S, Godiksen A, Mossin S, Beato P. A Consistent Reaction Scheme for the Selective Catalytic Reduction of Nitrogen Oxides with Ammonia. ACS Catal 2015. [DOI: 10.1021/cs501673g] [Citation(s) in RCA: 345] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Hanne Falsig
- Haldor Topsøe
A/S, Nymøllevej 55, 2800 Kgs. Lyngby, Denmark
| | | | | | | | | | - Filippo Giordanino
- Department
of Chemistry, INSTM Reference Center, University of Turin, Via Giuria
7, 10125 Torino, Italy
| | - Elisa Borfecchia
- Department
of Chemistry, INSTM Reference Center, University of Turin, Via Giuria
7, 10125 Torino, Italy
| | - Kirill A. Lomachenko
- Department
of Chemistry, INSTM Reference Center, University of Turin, Via Giuria
7, 10125 Torino, Italy
- Southern Federal
University, Zorge Street 5, 344090 Rostov-on-Don, Russia
| | - Carlo Lamberti
- Department
of Chemistry, INSTM Reference Center, University of Turin, Via Giuria
7, 10125 Torino, Italy
- Southern Federal
University, Zorge Street 5, 344090 Rostov-on-Don, Russia
| | - Silvia Bordiga
- Haldor Topsøe
A/S, Nymøllevej 55, 2800 Kgs. Lyngby, Denmark
| | - Anita Godiksen
- Centre
for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs. Lyngby, Denmark
| | - Susanne Mossin
- Centre
for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs. Lyngby, Denmark
| | - Pablo Beato
- Haldor Topsøe
A/S, Nymøllevej 55, 2800 Kgs. Lyngby, Denmark
| |
Collapse
|
25
|
Kjeldsen J, Rodrigues ACM, Mossin S, Yue Y. Critical V2O5/TeO2Ratio Inducing Abrupt Property Changes in Vanadium Tellurite Glasses. J Phys Chem B 2014; 118:14942-8. [DOI: 10.1021/jp508910m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
26
|
Frankaer CG, Mossin S, Ståhl K, Harris P. Towards accurate structural characterization of metal centres in protein crystals: the structures of Ni and Cu T(6) bovine insulin derivatives. Acta Crystallogr D Biol Crystallogr 2014; 70:110-22. [PMID: 24419384 PMCID: PMC3919263 DOI: 10.1107/s1399004713029040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/22/2013] [Indexed: 11/21/2022]
Abstract
Using synchrotron radiation (SR), the crystal structures of T6 bovine insulin complexed with Ni(2+) and Cu(2+) were solved to 1.50 and 1.45 Å resolution, respectively. The level of detail around the metal centres in these structures was highly limited, and the coordination of water in Cu site II of the copper insulin derivative was deteriorated as a consequence of radiation damage. To provide more detail, X-ray absorption spectroscopy (XAS) was used to improve the information level about metal coordination in each derivative. The nickel derivative contains hexacoordinated Ni(2+) with trigonal symmetry, whereas the copper derivative contains tetragonally distorted hexacoordinated Cu(2+) as a result of the Jahn-Teller effect, with a significantly longer coordination distance for one of the three water molecules in the coordination sphere. That the copper centre is of type II was further confirmed by electron paramagnetic resonance (EPR). The coordination distances were refined from EXAFS with standard deviations within 0.01 Å. The insulin derivative containing Cu(2+) is sensitive towards photoreduction when exposed to SR. During the reduction of Cu(2+) to Cu(+), the coordination geometry of copper changes towards lower coordination numbers. Primary damage, i.e. photoreduction, was followed directly by XANES as a function of radiation dose, while secondary damage in the form of structural changes around the Cu atoms after exposure to different radiation doses was studied by crystallography using a laboratory diffractometer. Protection against photoreduction and subsequent radiation damage was carried out by solid embedment of Cu insulin in a saccharose matrix. At 100 K the photoreduction was suppressed by ∼15%, and it was suppressed by a further ∼30% on cooling the samples to 20 K.
Collapse
Affiliation(s)
| | - Susanne Mossin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| | - Kenny Ståhl
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| | - Pernille Harris
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| |
Collapse
|
27
|
Käß M, Hohenberger J, Adelhardt M, Zolnhofer EM, Mossin S, Heinemann FW, Sutter J, Meyer K. Synthesis and Characterization of Divalent Manganese, Iron, and Cobalt Complexes in Tripodal Phenolate/N-Heterocyclic Carbene Ligand Environments. Inorg Chem 2013; 53:2460-70. [DOI: 10.1021/ic4024053] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Martina Käß
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Johannes Hohenberger
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Mario Adelhardt
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Eva M. Zolnhofer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Susanne Mossin
- Department
of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs. Lyngby, Denmark
| | - Frank W. Heinemann
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Jörg Sutter
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| |
Collapse
|
28
|
Giordanino F, Vennestrøm PNR, Lundegaard LF, Stappen FN, Mossin S, Beato P, Bordiga S, Lamberti C. Characterization of Cu-exchanged SSZ-13: a comparative FTIR, UV-Vis, and EPR study with Cu-ZSM-5 and Cu-β with similar Si/Al and Cu/Al ratios. Dalton Trans 2013; 42:12741-61. [DOI: 10.1039/c3dt50732g] [Citation(s) in RCA: 271] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
29
|
Mossin S, Tran BL, Adhikari D, Pink M, Heinemann FW, Sutter J, Szilagyi RK, Meyer K, Mindiola DJ. A mononuclear Fe(III) single molecule magnet with a 3/2↔5/2 spin crossover. J Am Chem Soc 2012; 134:13651-61. [PMID: 22817325 PMCID: PMC3495239 DOI: 10.1021/ja302660k] [Citation(s) in RCA: 236] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The air stable complex [(PNP)FeCl(2)] (1) (PNP = N[2-P(CHMe(2))(2)-4-methylphenyl](2)(-)), prepared from one-electron oxidation of [(PNP)FeCl] with ClCPh(3), displays an unexpected S = 3/2 to S = 5/2 transition above 80 K as inferred by the dc SQUID magnetic susceptibility measurement. The ac SQUID magnetization data, at zero field and between frequencies 10 and 1042 Hz, clearly reveal complex 1 to have frequency dependence on the out-of-phase signal and thus being a single molecular magnet with a thermally activated barrier of U(eff) = 32-36 cm(-1) (47-52 K). Variable-temperature Mössbauer data also corroborate a significant temperature dependence in δ and ΔE(Q) values for 1, which is in agreement with the system undergoing a change in spin state. Likewise, variable-temperature X-band EPR spectra of 1 reveals the S = 3/2 to be likely the ground state with the S = 5/2 being close in energy. Multiedge XAS absorption spectra suggest the electronic structure of 1 to be highly covalent with an effective iron oxidation state that is more reduced than the typical ferric complexes due to the significant interaction of the phosphine groups in PNP and Cl ligands with iron. A variable-temperature single crystal X-ray diffraction study of 1 collected between 30 and 300 K also reveals elongation of the Fe-P bond lengths and increment in the Cl-Fe-Cl angle as the S = 5/2 state is populated. Theoretical studies show overall similar orbital pictures except for the d(z(2)) orbital, which has the most sensitivity to change in the geometry and bonding, where the quartet ((4)B) and the sextet ((6)A) states are close in energy.
Collapse
Affiliation(s)
- Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry, Technical University of Denmark, 2800 Lyngby, Denmark
| | - Ba L. Tran
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| | - Debashis Adhikari
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| | - Maren Pink
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| | - Frank W. Heinemann
- Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nuremburg, Erlangen, Germany 91058
| | - Jörg Sutter
- Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nuremburg, Erlangen, Germany 91058
| | - Robert K. Szilagyi
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana USA 59717
| | - Karsten Meyer
- Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nuremburg, Erlangen, Germany 91058
| | - Daniel J. Mindiola
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| |
Collapse
|
30
|
Melzer MM, Mossin S, Cardenas AJP, Williams KD, Zhang S, Meyer K, Warren TH. A Copper(II) Thiolate from Reductive Cleavage of an S-Nitrosothiol. Inorg Chem 2012; 51:8658-60. [DOI: 10.1021/ic301356h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marie M. Melzer
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| | - Susanne Mossin
- Department of Chemistry
and Pharmacy, Friedrich-Alexander-University, Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen,
Germany
| | - Allan Jay P. Cardenas
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| | - Kamille D. Williams
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| | - Shiyu Zhang
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| | - Karsten Meyer
- Department of Chemistry
and Pharmacy, Friedrich-Alexander-University, Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen,
Germany
| | - Timothy H. Warren
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| |
Collapse
|
31
|
Birk T, Pedersen KS, Thuesen CA, Weyhermüller T, Schau-Magnussen M, Piligkos S, Weihe H, Mossin S, Evangelisti M, Bendix J. Fluoride Bridges as Structure-Directing Motifs in 3d-4f Cluster Chemistry. Inorg Chem 2012; 51:5435-43. [DOI: 10.1021/ic300421x] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Torben Birk
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| | - Kasper S. Pedersen
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| | - Christian Aa. Thuesen
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| | - Thomas Weyhermüller
- Max Planck Institute for Bioinorganic Chemistry, D-45470 Mülheim an
der Ruhr, Germany
| | - Magnus Schau-Magnussen
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| | - Stergios Piligkos
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| | - Högni Weihe
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| | - Susanne Mossin
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby,
Denmark
| | - Marco Evangelisti
- Instituto de Ciencia
de Materiales
de Aragón, Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jesper Bendix
- Department
of Chemistry, University of Copenhagen,
Universitetsparken 5, DK-2100
Copenhagen, Denmark
| |
Collapse
|
32
|
Frazier BA, Bartholomew ER, Wolczanski PT, DeBeer S, Santiago-Berrios M, Abruña HD, Lobkovsky EB, Bart SC, Mossin S, Meyer K, Cundari TR. Synthesis and Characterization of (smif)2Mn (n = 0, M = V, Cr, Mn, Fe, Co, Ni, Ru; n = +1, M = Cr, Mn, Co, Rh, Ir; smif =1,3-di-(2-pyridyl)-2-azaallyl). Inorg Chem 2011; 50:12414-36. [DOI: 10.1021/ic200376f] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [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)
- Brenda A. Frazier
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Erika R. Bartholomew
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Serena DeBeer
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Mitk’El Santiago-Berrios
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Hector D. Abruña
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Suzanne C. Bart
- Department of Chemistry & Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Susanne Mossin
- Department of Chemistry & Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry & Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Thomas R. Cundari
- Department of Chemistry, Center
for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, Box 305070, Denton, Texas
76203-5070, United States
| |
Collapse
|
33
|
Wiese S, Badiei YM, Gephart RT, Mossin S, Varonka MS, Melzer MM, Meyer K, Cundari TR, Warren TH. Catalytic CH Amination with Unactivated Amines through Copper(II) Amides. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003676] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
34
|
Wiese S, Badiei YM, Gephart RT, Mossin S, Varonka MS, Melzer MM, Meyer K, Cundari TR, Warren TH. Catalytic CH Amination with Unactivated Amines through Copper(II) Amides. Angew Chem Int Ed Engl 2010; 49:8850-5. [DOI: 10.1002/anie.201003676] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
35
|
Melzer M, Mossin S, Dai X, Bartell A, Kapoor P, Meyer K, Warren T. A Three-Coordinate Copper(II) Amide from Reductive Cleavage of a Nitrosamine. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
36
|
Melzer M, Mossin S, Dai X, Bartell A, Kapoor P, Meyer K, Warren T. A Three-Coordinate Copper(II) Amide from Reductive Cleavage of a Nitrosamine. Angew Chem Int Ed Engl 2009; 49:904-7. [DOI: 10.1002/anie.200905171] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
37
|
Salgado EN, Lewis RA, Mossin S, Rheingold AL, Tezcan FA. Control of protein oligomerization symmetry by metal coordination: C2 and C3 symmetrical assemblies through Cu(II) and Ni(II) coordination. Inorg Chem 2009; 48:2726-8. [PMID: 19267481 DOI: 10.1021/ic9001237] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe the metal-dependent self-assembly of symmetrical protein homooligomers from protein building blocks that feature appropriately engineered metal-chelating motifs on their surfaces. Crystallographic studies indicate that the same four-helix-bundle protein construct, MBPC-1, can self-assemble into C(2) and C(3) symmetrical assemblies dictated by Cu(II) and Ni(II) coordination, respectively. The symmetry inherent in metal coordination can thus be directly applied to biological self-assembly.
Collapse
Affiliation(s)
- Eric N Salgado
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
| | | | | | | | | |
Collapse
|
38
|
Adhikari D, Mossin S, Basuli F, Dible BR, Chipara M, Fan H, Huffman JC, Meyer K, Mindiola DJ. A Dinuclear Ni(I) System Having a Diradical Ni2N2Diamond Core Resting State: Synthetic, Structural, Spectroscopic Elucidation, and Reductive Bond Splitting Reactions. Inorg Chem 2008; 47:10479-90. [DOI: 10.1021/ic801137p] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
39
|
Adhikari D, Mossin S, Basuli F, Huffman JC, Szilagyi RK, Meyer K, Mindiola DJ. Structural, spectroscopic, and theoretical elucidation of a redox-active pincer-type ancillary applied in catalysis. J Am Chem Soc 2008; 130:3676-82. [PMID: 18302384 DOI: 10.1021/ja7108486] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [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
Pincer-type ligands are believed to be very robust scaffolds that can support multifarious functionalities as well as highly reactive metal motifs applied in organometallic chemistry, especially in the realm of catalysis. In this paper, we describe the redox and, therefore, noninnocent behavior of a PNP (PNP- = N[2-P(CHMe2)2-4-methylphenyl]2) pincer ancillary bound to nickel. A combination of structural, spectroscopic, and theoretical techniques suggests that this type of framework can house an electron hole when coordinated to Ni(II).
Collapse
Affiliation(s)
- Debashis Adhikari
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, USA
| | | | | | | | | | | | | |
Collapse
|
40
|
Rae AD, Mossin S, Sørensen HO. Structure refinement of a twinned pseudo-symmetric crystal of [Mn(C10H24N4)(NCO)2]+*ClO4-. Acta Crystallogr B 2005; 61:407-17. [PMID: 16041090 DOI: 10.1107/s0108768105015211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2005] [Accepted: 05/12/2005] [Indexed: 11/10/2022]
Abstract
The crystal studied is a 0.545 (1):0.455 twin, space group C\bar 1, Z = 16, and is a commensurate occupational and displacive modulation of a Z = 4 idealized parent structure with the space group A2/a and a(p) = a/2, b(p) = b/2, c(p) = c. A hierarchical approach to solution and refinement led sequentially to structures in the space groups A2/a, P2(1)/n, P\bar 1 and finally C\bar 1. The major and minor components of the reflection intensities could be identified using irreducible representations of A2/a and P2(1)/n, which in turn suggested suitable constraints and restraints for optimizing the refinement pathway. Comparative refinement was used to show the correctness of the final structure solution and how appropriately chosen constrained refinement allowed an escape from a false minima.
Collapse
Affiliation(s)
- Alan David Rae
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia.
| | | | | |
Collapse
|
41
|
Mossin S, Sørensen HO, Weihe H, Glerup J, Søtofte I. Manganese (III) cyclam complexes with aqua, iodo, nitrito, perchlorato and acetic acid/acetato axial ligands. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
42
|
Mossin S, Weihe H. Average One-Center Two-Electron Exchange Integrals and Exchange Interactions. Structure and Bonding 2004. [DOI: 10.1007/b11311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
|
43
|
Mossin S, Weihe H, Sørensen HO, Lima N, Sessoli R. Rationalisation of weak ferromagnetism in manganese(iii) chains: the relation between structure and ordering phenomena. Dalton Trans 2004:632-9. [PMID: 15252527 DOI: 10.1039/b314355d] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, structure and magnetic properties of the one-dimensional chain compounds [Mn(cyclam)(SO4)]ClO4.H2O (1) and [Mn(cyclam)(HCOO)](CF3SO3)(ClO4) (2) are reported. Cyclam is the cyclic tetradentate ligand 1,4,7,11-tetraazacyclotetradecane. Both chain compounds exhibit antiferromagnetic interactions within the chains. A magnetic ordering phase transition at 5.5 K in (1) is investigated by magnetisation measurements along the three principal crystallographic axes of a single crystal and the results show unambiguously that the ferromagnetic ordering is only taking place along one crystallographic axis. The spin structure of the magnetic ordered phase and the magnitude of the ferromagnetic moment are correlated with the crystal structure and symmetry of the compound.
Collapse
Affiliation(s)
- Susanne Mossin
- Department of Chemistry, University of Copenhagen, Denmark
| | | | | | | | | |
Collapse
|
44
|
Dobe C, Andres HP, Tregenna-Piggott PL, Mossin S, Weihe H, Janssen S. Variable temperature inelastic neutron scattering study of chromium(II) Tutton salt: manifestation of the 5E⊗e Jahn–Teller effect. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01131-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
45
|
Mossin S, Weihe H, Barra AL. Is the axial zero-field splitting parameter of tetragonally elongated high-spin manganese(III) complexes always negative? J Am Chem Soc 2002; 124:8764-5. [PMID: 12137507 DOI: 10.1021/ja012574p] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.9] [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 positive axial zero-field splitting parameter D relevant for the S = 2 ground state of [Mn(cyclam)I2]I (cyclam = 1,4,8,11-tetraazacyclotetradecane) is interpreted using the valence bond configuration interaction model which explicitly considers the covalency of the manganese-iodide bond.
Collapse
Affiliation(s)
- Susanne Mossin
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | | | | |
Collapse
|
46
|
Mossin S, Sørensen HO, Weihe H. trans-Bis(cyano-kappaC)(1,4,8,11-tetraazacyclotetradecane-kappa4N)manganese(III) perchlorate, a low-spin manganese(III) complex. Acta Crystallogr C 2002; 58:M204-6. [PMID: 11932516 DOI: 10.1107/s0108270102001713] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2002] [Accepted: 01/28/2002] [Indexed: 11/10/2022] Open
Abstract
The crystal structure of the low-spin (S = 1) MnIII complex [Mn(CN)(2)(C(10)H(24)N(4))]ClO(4), or trans-[Mn(CN)(2)(cyclam)](ClO(4)) (cyclam is the tetradentate amine ligand 1,4,8,11-tetraazacyclotetradecane), is reported. The structural parameters in the Mn(cyclam) moiety are found to be insensitive to both the spin and the oxidation state of the Mn ion. The difference between high- and low-spin Mn(III) complexes is that a pronounced tetragonal elongation of the coordination octahedron occurs in high-spin complexes and a slight tetragonal compression is seen in low-spin complexes, as in the title complex.
Collapse
Affiliation(s)
- Susanne Mossin
- Inorganic Chemistry, Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Denmark.
| | | | | |
Collapse
|
47
|
Mossin S. [Diffuse suffering. The new "war sailors"? Results of 2 studies]. Sykepl Fag 1993; 81:7-10. [PMID: 8275122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
48
|
Mossin S. [Diffuse suffering. Suspect behavior of patients with illness without objective medical findings]. Sykepl Fag 1993; 81:3-6. [PMID: 8275113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|