1
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Grebenyuk D, Shaulskaya M, Shevchenko A, Zobel M, Tedeeva M, Kustov A, Sadykov I, Tsymbarenko D. Tuning the Cerium-Based Metal-Organic Framework Formation by Template Effect and Precursor Selection. ACS Omega 2023; 8:48394-48404. [PMID: 38144061 PMCID: PMC10733954 DOI: 10.1021/acsomega.3c07906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 12/26/2023]
Abstract
The novel metal-organic framework [(CH3)2NH2]2[Ce2(bdc)4(DMF)2]·2H2O (Ce-MOF, H2bdc-terephthalic acid, DMF-N,N-dimethylformamide) was synthesized by a simple solvothermal method. Ce-MOF has 3D connectivity of bcu type with a dinuclear fragment connected with eight neighbors, while three types of guest species are residing in its pores: water, DMF, and dimethylammonium cations. Dimethylamine was demonstrated to have a decisive templating effect on the formation of Ce-MOF, as its deliberate addition to the solvothermal reaction allows the reproducible synthesis of the new framework. Otherwise, the previously reported MOF Ce5(bdc)7.5(DMF)4 (Ce5) or its composite with nano-CeO2 (CeO2@Ce5) was obtained. Various Ce carboxylate precursors and synthetic conditions were explored to evidence the major stability of Ce-MOF and Ce5 within the Ce carboxylate-H2bdc-DMF system. The choice of precursor impacts the surface area of Ce-MOF and thus its reactivity in an oxidative atmosphere. The in situ PXRD and TG-DTA-MS study of Ce-MOF in a nonoxidative atmosphere demonstrates that it eliminates H2O and DMF along with (CH3)2NH guest species in two distinct stages at 70 and 250 °C, respectively, yielding [Ce2(bdc)3(H2bdc)]. The H2bdc molecule is removed at 350 °C with the formation of novel modification of Ce2(bdc)3, which is stable at least up to 450 °C. According to the total X-ray scattering study with pair distribution function analysis, the most pronounced local structure transformation occurs upon departure of DMF and (CH3)2NH guest species, which is in line with the in situ PXRD experiment. In an oxidative atmosphere, Ce-MOF undergoes combustion to CeO2 at a temperature as low as 390 °C. MOF-derived CeO2 from Ce-MOF, Ce5, and CeO2@Ce5 exhibits catalytic activity in the CO oxidation reaction.
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Affiliation(s)
- Dimitry Grebenyuk
- Lomonosov
Moscow State University, Moscow 119991, Russia
- Faculty
of Materials Science, MSU-BIT University, Shenzhen 518172, China
| | | | - Artem Shevchenko
- Lomonosov
Moscow State University, Moscow 119991, Russia
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Mirijam Zobel
- Institute
of Crystallography, RWTH Aachen University, Aachen 52066, Germany
| | - Marina Tedeeva
- Lomonosov
Moscow State University, Moscow 119991, Russia
| | - Alexander Kustov
- Lomonosov
Moscow State University, Moscow 119991, Russia
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Ilia Sadykov
- Paul
Scherrer
Institute, Villigen 5232, Switzerland
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2
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Krauss SW, Eckardt M, Will J, Spiecker E, Siegel R, Dulle M, Schweins R, Pauw B, Senker J, Zobel M. The H-D-isotope effect of heavy water affecting ligand-mediated nanoparticle formation in SANS and NMR experiments. Nanoscale 2023; 15:16413-16424. [PMID: 37791518 DOI: 10.1039/d3nr02419a] [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] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
An isotopic effect of normal (H2O) vs. heavy water (D2O) is well known to fundamentally affect the structure and chemical properties of proteins, for instance. Here, we correlate the results from small angle X-ray and neutron scattering (SAXS, SANS) with high-resolution scanning transmission electron microscopy to track the evolution of CdS nanoparticle size and crystallinity from aqueous solution in the presence of the organic ligand ethylenediaminetetraacetate (EDTA) at room temperature in both H2O and D2O. We provide evidence via SANS experiments that exchanging H2O with D2O impacts nanoparticle formation by changing the equilibria and dynamics of EDTA clusters in solution as investigated by nuclear magnetic resonance analysis. The colloidal stability of the CdS nanoparticles, covered by a layer of [Cd(EDTA)]2- complexes, is significantly reduced in D2O despite the strong stabilizing effect of EDTA in suspensions of normal water. Hence, conclusions about nanoparticle formation mechanisms from D2O solutions reveal limited transferability to reactions in normal water due to isotopic effects, which thus need to be discussed for contrast match experiments.
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Affiliation(s)
- Sebastian W Krauss
- Department of Chemistry, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Mirco Eckardt
- Department of Chemistry, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Johannes Will
- Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy (CENEM), Friedrich-Alexander-Universität Erlangen-Nürnberg, IZNF, Cauerstraße 3, 91058 Erlangen, Germany
| | - Erdmann Spiecker
- Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy (CENEM), Friedrich-Alexander-Universität Erlangen-Nürnberg, IZNF, Cauerstraße 3, 91058 Erlangen, Germany
| | - Renée Siegel
- Inorganic Chemistry III and Northern Bavarian NMR Centre, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Martin Dulle
- JCNS-1/IBI-8: Neutron Scattering and Biological Matter, Forschungszentrum Jülich Gmbh, Wilhelm-Johnen-Straße, 52428 Jülich, Germany
| | - Ralf Schweins
- Institut Laue-Langevin, DS/LSS, 71 Avenue des Martyrs, Grenoble 38000, France
| | - Brian Pauw
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Jürgen Senker
- Inorganic Chemistry III and Northern Bavarian NMR Centre, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Mirijam Zobel
- Institute of Crystallography, RWTH Aachen University, Jägerstr. 17-19, 52066 Aachen, Germany.
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3
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Thomä SLJ, Zobel M. Ethanol-water motifs-A re-interpretation of the double-difference pair distribution functions of aqueous iron oxide nanoparticle dispersions. J Chem Phys 2023; 158:2896000. [PMID: 37309892 DOI: 10.1063/5.0147659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 05/26/2023] [Indexed: 06/14/2023] Open
Abstract
In dispersion, nanoparticles can interact with the surrounding dispersion medium, such that an interfacial region with a structure differing from that of the bulk exists. Distinct nanoparticulate surfaces induce specific degrees of interfacial phenomena, and the availability of surface atoms is a crucial prerequisite for interfacial restructuring. Here, we investigate the nanoparticle-water interface of 0.5-10 wt. % aqueous iron oxide nanoparticle dispersions of 6 nm diameter in the presence of 6 vol. % ethanol with x-ray absorption spectroscopy (XAS) and atomic pair distribution function (PDF) analysis. The absence of surface hydroxyl-groups in XAS spectra is in accordance with the double-difference PDF (dd-PDF) analysis, due to a fully covered surface from the capping agent. The previously observed dd-PDF signal is not stemming from a hydration shell, as postulated in Thomä et al. [Nat Commun. 10, 995 (2019)], but from the residual traces of ethanol from nanoparticle purification. With this article, we provide an insight into the arrangement of EtOH solutes in water at low concentration.
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Affiliation(s)
- Sabrina L J Thomä
- Institute of Crystallography, RWTH Aachen University, Jägerstr. 17-19, 52066 Aachen, Germany
| | - Mirijam Zobel
- Institute of Crystallography, RWTH Aachen University, Jägerstr. 17-19, 52066 Aachen, Germany
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4
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Thomä SLJ, Zobel M. Beam-induced redox chemistry in iron oxide nanoparticle dispersions at ESRF-EBS. J Synchrotron Radiat 2023; 30:440-444. [PMID: 36891857 PMCID: PMC10000811 DOI: 10.1107/s1600577522011523] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 11/30/2022] [Indexed: 06/08/2023]
Abstract
The storage ring upgrade of the European Synchrotron Radiation Facility makes ESRF-EBS the most brilliant high-energy fourth-generation light source, enabling in situ studies with unprecedented time resolution. While radiation damage is commonly associated with degradation of organic matter such as ionic liquids or polymers in the synchrotron beam, this study clearly shows that highly brilliant X-ray beams readily induce structural changes and beam damage in inorganic matter, too. Here, the reduction of Fe3+ to Fe2+ in iron oxide nanoparticles by radicals in the brilliant ESRF-EBS beam, not observed before the upgrade, is reported. Radicals are created due to radiolysis of an EtOH-H2O mixture with low EtOH concentration (∼6 vol%). In light of extended irradiation times during insitu experiments in, for example, battery and catalysis research, beam-induced redox chemistry needs to be understood for proper interpretation of insitu data.
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Affiliation(s)
- Sabrina L. J. Thomä
- Institute of Crystallography, RWTH Aachen University, Jägerstraße 17–19, Aachen, 52066 Nordrhein-Westfalen, Germany
| | - Mirijam Zobel
- Institute of Crystallography, RWTH Aachen University, Jägerstraße 17–19, Aachen, 52066 Nordrhein-Westfalen, Germany
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5
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Behrendt G, Prinz N, Wolf A, Baumgarten L, Gaur A, Grunwaldt JD, Zobel M, Behrens M, Mangelsen S. Substitution of Copper by Magnesium in Malachite: Insights into the Synthesis and Structural Effects. Inorg Chem 2022; 61:19678-19694. [PMID: 36441526 DOI: 10.1021/acs.inorgchem.2c01976] [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: 11/29/2022]
Abstract
The phase width of the copper hydroxycarbonate malachite, Cu2CO3(OH)2, upon substitution with magnesium has been studied in detail. In extension of a previous study on amorphous precursors, the introduction of a hydrothermal aging step allowed the retrieval of crystalline hydroxycarbonate samples with up to 37 atom % Mg (metal content) that are suitable candidates as precursors to Cu/MgO catalysts for CO hydrogenation. Simultaneous refinements of X-ray powder diffraction and pair distribution function (PDF) data as well as complementary spectroscopic insight (X-ray absorption and infrared spectroscopy) revealed that samples with up to 18 atom % Mg are phase-pure magnesian malachites but the magnesium content can be increased beyond this threshold when mcguinnessite (CuMgCO3(OH)2) is accepted as a side phase. In a complementary study, a continuous increase of the magnesium fraction was found during aging and the corresponding structural evolution was studied by means of PDF. These findings add significant insight into the aging chemistry of crystalline Cu,Mg hydroxycarbonates. Furthermore, both phase-pure magnesian malachite and mcguinnessite-containing samples with up to 37 atom % Mg have been examined by thermogravimetry, X-ray powder diffraction, and N2 physisorption and were found to be promising candidates for use as precursors for the preparation of Cu/MgO catalysts.
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Affiliation(s)
- Gereon Behrendt
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstr. 7, 45141 Essen, Germany
| | - Nils Prinz
- Institute of Crystallography, RWTH Aachen, Jägerstr. 17-19, 52066 Aachen, Germany
| | - Anna Wolf
- Institute of Inorganic Chemistry, Christian-Albrecht University of Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Lorena Baumgarten
- Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Engesserstr. 20, 76131 Karlsruhe, Germany.,Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Abhijeet Gaur
- Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Engesserstr. 20, 76131 Karlsruhe, Germany
| | - Jan-Dierk Grunwaldt
- Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Engesserstr. 20, 76131 Karlsruhe, Germany.,Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Mirijam Zobel
- Institute of Crystallography, RWTH Aachen, Jägerstr. 17-19, 52066 Aachen, Germany
| | - Malte Behrens
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstr. 7, 45141 Essen, Germany.,Institute of Inorganic Chemistry, Christian-Albrecht University of Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Sebastian Mangelsen
- Institute of Inorganic Chemistry, Christian-Albrecht University of Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
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6
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Prinz N, Tsymbarenko D, Zobel M. Recent advances in data quality and versatility of laboratory PDF experiments. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322095729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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7
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Behrendt G, Mockenhaupt B, Prinz N, Zobel M, Ras E, Behrens M. CO Hydrogenation to Methanol over Cu/MgO Catalysts and Their Synthesis from Amorphous Magnesian Georgeite Precursors. ChemCatChem 2022. [DOI: 10.1002/cctc.202200986] [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)
- Gereon Behrendt
- Insitute of Inorganic Chemistry University of Duisburg-Essen Universitätsstr. 7 45141 Essen Germany
| | - Benjamin Mockenhaupt
- Insitute of Inorganic Chemistry University of Duisburg-Essen Universitätsstr. 7 45141 Essen Germany
- Institute of Inorganic Chemistry Christian-Albrecht University of Kiel Max-Eyth-Str. 2 24118 Kiel Germany
| | - Nils Prinz
- Institute of Crystallography RWTH Aachen Jägerstr. 17–19 52066 Aachen Germany
| | - Mirijam Zobel
- Institute of Crystallography RWTH Aachen Jägerstr. 17–19 52066 Aachen Germany
| | - Erik‐Jan Ras
- Avantium Technologies B.V. Zekeringstraat 29 1014 BV Amsterdam (The Netherlands
| | - Malte Behrens
- Insitute of Inorganic Chemistry University of Duisburg-Essen Universitätsstr. 7 45141 Essen Germany
- Institute of Inorganic Chemistry Christian-Albrecht University of Kiel Max-Eyth-Str. 2 24118 Kiel Germany
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8
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Tsymbarenko D, Grebenyuk D, Burlakova M, Zobel M. Quick and robust PDF data acquisition using a laboratory single-crystal X-ray diffractometer for study of polynuclear lanthanide complexes in solid form and in solution. J Appl Crystallogr 2022. [DOI: 10.1107/s1600576722005878] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Self-assembled polynuclear lanthanide hydroxo complexes are important objects in the reticular chemistry approach to the design of various functional materials. Revealing their structure in the solid state and understanding the molecular mechanism of self-assembly in solution require a universal and reliable structural method. Pair distribution function (PDF) analysis is a powerful technique which enables structural insight for a wide range of crystalline and amorphous materials on the nanoscale, but commonly measurements are performed at synchrotron X-ray sources or on specially designed laboratory diffractometers. In the present paper, a standard Bruker D8 QUEST single-crystal X-ray diffractometer equipped with a micro-focus Mo tube and CMOS Photon III detector was adapted to measure PDF data of high quality with Q
max = 16.97 Å–1 for solid and liquid samples. An improved data collection strategy and the original data reduction software FormagiX enable calibration and azimuthal full-frame integration of 2D frames, delivering reliable PDFs up to 80 Å with instrumental parameters Q
damp = 0.018 Å−1 and Q
broad = 0.010 Å−1. The effectiveness of the developed approach was demonstrated with reference samples and real-case studies of tetranuclear lanthanide hydroxocarboxylates in solid form and in solution.
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9
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Behrendt G, Mockenhaupt B, Prinz N, Zobel M, Ras EJ, Behrens M. CO Hydrogenation to Methanol over Cu/MgO Catalysts and Their Synthesis from Amorphous Magnesian Georgeite Precursors. ChemCatChem 2022. [DOI: 10.1002/cctc.202200299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Gereon Behrendt
- Universität Duisburg-Essen: Universitat Duisburg-Essen Inorganic Chemistry GERMANY
| | - Benjamin Mockenhaupt
- University of Duisburg-Essen: Universitat Duisburg-Essen Inorganic Chemistry GERMANY
| | - Nils Prinz
- RWTH: Rheinisch-Westfalische Technische Hochschule Aachen Institut für Kristallographie GERMANY
| | - Mirijam Zobel
- RWTH: Rheinisch-Westfalische Technische Hochschule Aachen Institut für Kristallographie GERMANY
| | - Erik-Jan Ras
- Avantium Technologies B.V. Avantium Technologies B.V. NETHERLANDS
| | - Malte Behrens
- Kiel University Institute of Inorganic Chemistry Max-Eyth-Str. 2 24118 Kiel GERMANY
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10
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Weber S, Zimmermann RT, Bremer J, Abel KL, Poppitz D, Prinz N, Ilsemann J, Wendholt S, Yang Q, Pashminehazar R, Monaco F, Cloetens P, Huang X, Kübel C, Kondratenko E, Bauer M, Bäumer M, Zobel M, Gläser R, Sundmacher K, Sheppard TL. Digitization in Catalysis Research: Towards a Holistic Description of a Ni/Al2O3 Reference Catalyst for CO2 Methanation. ChemCatChem 2022. [DOI: 10.1002/cctc.202101878] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sebastian Weber
- Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie Institute of Catalysis Research and Technology GERMANY
| | - Ronny T. Zimmermann
- Otto-von-Guericke-University Magdeburg: Otto von Guericke Universitat Magdeburg Institute of Process Engineering GERMANY
| | - Jens Bremer
- Max Planck Institute for Dynamics of Complex Technical Systems: Max-Planck-Institut fur Dynamik komplexer technischer Systeme Department of Process Systems Engineering GERMANY
| | - Ken L. Abel
- Leipzig University: Universitat Leipzig Institute of Chemical Technology GERMANY
| | - David Poppitz
- Leipzig University: Universitat Leipzig Institute of Chemical Technology GERMANY
| | - Nils Prinz
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Institute of Crystallography GERMANY
| | - Jan Ilsemann
- University of Bremen: Universitat Bremen Institute of Applied and Physical Chemistry GERMANY
| | - Sven Wendholt
- Paderborn University: Universitat Paderborn Faculty of Science and Center for Sustainable Systems Design GERMANY
| | - Qingxin Yang
- Leibniz Institute for Catalysis: Leibniz-Institut fur Katalyse eV LIKAT GERMANY
| | - Reihaneh Pashminehazar
- Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie Institute for Chemical Technology and Polymer Chemistry GERMANY
| | | | - Peter Cloetens
- European Synchrotron Radiation Facility: ESRF ESRF FRANCE
| | - Xiaohui Huang
- Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie Institute of Nanotechnology GERMANY
| | - Christian Kübel
- Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie Institute of Nanotechnology GERMANY
| | - Evgenii Kondratenko
- Leibniz Institute for Catalysis: Leibniz-Institut fur Katalyse eV LIKAT GERMANY
| | - Matthias Bauer
- Paderborn University: Universitat Paderborn Faculty of Science and Center for Sustainable Systems Design GERMANY
| | - Marcus Bäumer
- University of Bremen: Universitat Bremen Institute of Applied and Physical Chemistry GERMANY
| | - Mirijam Zobel
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Institute of Crystallography GERMANY
| | - Roger Gläser
- Leipzig University: Universitat Leipzig Institute of Chemical Technology GERMANY
| | - Kai Sundmacher
- Otto-von-Guericke-University Magdeburg: Otto von Guericke Universitat Magdeburg Institute of Process Engineering GERMANY
| | - Thomas Lennon Sheppard
- Karlsruher Institut fur Technologie Institute for Chemical Technology and Polymer Chemistry Engesserstrasse 20 76131 Karlsruhe GERMANY
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11
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Simon C, Blösser A, Eckardt M, Kurz H, Weber B, Zobel M, Marschall R. Magnetic properties and structural analysis on spinel MnFe
2
O
4
nanoparticles prepared
via
non‐aqueous microwave synthesis. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Christopher Simon
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
| | - André Blösser
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
| | - Mirco Eckardt
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
| | - Hannah Kurz
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
| | - Birgit Weber
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
| | - Mirijam Zobel
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
- Institute of Crystallography RWTH Aachen University 52066 Aachen Germany
| | - Roland Marschall
- Department of Chemistry University of Bayreuth Universitaetsstrasse 30 95447 Bayreuth Germany
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12
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Elfinger M, Schönauer T, Thomä SLJ, Stäglich R, Drechsler M, Zobel M, Senker J, Kempe R. Co-Catalyzed Synthesis of Primary Amines via Reductive Amination employing Hydrogen under very mild Conditions. ChemSusChem 2021; 14:2360-2366. [PMID: 33826246 PMCID: PMC8251741 DOI: 10.1002/cssc.202100553] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Nanostructured and reusable 3d-metal catalysts that operate with high activity and selectivity in important chemical reactions are highly desirable. Here, a cobalt catalyst was developed for the synthesis of primary amines via reductive amination employing hydrogen as the reducing agent and easy-to-handle ammonia, dissolved in water, as the nitrogen source. The catalyst operates under very mild conditions (1.5 mol% catalyst loading, 50 °C and 10 bar H2 pressure) and outperforms commercially available noble metal catalysts (Pd, Pt, Ru, Rh, Ir). A broad scope and a very good functional group tolerance were observed. The key for the high activity seemed to be the used support: an N-doped amorphous carbon material with small and turbostratically disordered graphitic domains, which is microporous with a bimodal size distribution and with basic NH functionalities in the pores.
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Affiliation(s)
- Matthias Elfinger
- Inorganic Chemistry II – Catalyst designSustainable Chemistry CentreUniversity of Bayreuth95440BayreuthGermany
| | - Timon Schönauer
- Inorganic Chemistry II – Catalyst designSustainable Chemistry CentreUniversity of Bayreuth95440BayreuthGermany
| | - Sabrina L. J. Thomä
- Solid State Chemistry – Mesostructured MaterialsUniversity of Bayreuth95440BayreuthGermany
| | - Robert Stäglich
- Inorganic Chemistry III and North Bavarian NMR centerUniversity of Bayreuth95440BayreuthGermany
| | - Markus Drechsler
- Bavarian Polymer Institute (BPI)Keylab “Electron and Optical Microscopy”University of Bayreuth95440BayreuthGermany
| | - Mirijam Zobel
- Solid State Chemistry – Mesostructured MaterialsUniversity of Bayreuth95440BayreuthGermany
| | - Jürgen Senker
- Inorganic Chemistry III and North Bavarian NMR centerUniversity of Bayreuth95440BayreuthGermany
| | - Rhett Kempe
- Inorganic Chemistry II – Catalyst designSustainable Chemistry CentreUniversity of Bayreuth95440BayreuthGermany
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13
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Grebenyuk D, Zobel M, Polentarutti M, Ungur L, Kendin M, Zakharov K, Degtyarenko P, Vasiliev A, Tsymbarenko D. A Family of Lanthanide Hydroxo Carboxylates with 1D Polymeric Topology and Ln 4 Butterfly Core Exhibits Switchable Supramolecular Arrangement. Inorg Chem 2021; 60:8049-8061. [PMID: 34003006 DOI: 10.1021/acs.inorgchem.1c00581] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The unique family of coordination polymers [Ln4(OH)2(piv)10(H2O)2]∞ of 11 lanthanides (Ln = La-Er) has been prepared by a simple solution method based on controlled hydrolysis. The ribbon-like polymeric structure consisting of connected tetranuclear clusters and supported by pivalate ligands and a framework of H-bonds has been revealed by single-crystal X-ray diffraction. While the compounds demonstrate similar PXRD patterns and unit cell parameters, the joint single-crystal XRD and pair distribution function data suggest the significant local structure change along the lanthanide series. The compounds exist as two packing polymorphs (α and β) with similar ribbon geometry, but different supramolecular arrangement of the ribbons. Dehydration of either polymorph does not disturb the tetranuclear core but leads to a translational symmetry loss along the ribbon and a transformation of the 3D-ordered crystal into a 2D-ordered mesostructure. Rehydration of the mesostructure leads to the β polymorph (except La and Ce), allowing the deliberate switching between the polymorphs via dehydration-rehydration evidenced by means of powder X-ray diffraction, pair distribution function analysis, and density functional theory calculations. Ab initio calculations reveal significant magnetic anisotropy of Ln3+ ions with ferro- and antiferromagnetic interactions within tetranuclear [Ln4(OH)2(piv)10(H2O)2] species. Magnetic susceptibility measurements demonstrated antiferromagnetic coupling, slow magnetic relaxation for Dy, Ho, and Er complexes, and field-induced single-chain magnetism for the Dy compound.
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Affiliation(s)
| | - Mirijam Zobel
- Chemistry Department, University Bayreuth, Bayreuth 95447, Germany
| | | | - Liviu Ungur
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Mikhail Kendin
- Lomonosov Moscow State University, Moscow 119991, Russia
| | | | - Pavel Degtyarenko
- SuperOx, LLC, Moscow 117246, Russia.,Joint Institute for High Temperature of the Russian Academy of Science, Moscow 125412, Russia
| | - Alexander Vasiliev
- Lomonosov Moscow State University, Moscow 119991, Russia.,National University of Science and Technology "MISiS", Moscow 119049, Russia
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14
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Bueno CG, Gerz M, Moora M, Leon D, Gomez-Garcia D, de Leon DG, Font X, Al-Quraishy S, Hozzein WN, Zobel M. Distribution of plant mycorrhizal traits along an elevational gradient does not fully mirror the latitudinal gradient. Mycorrhiza 2021; 31:149-159. [PMID: 33475799 DOI: 10.1007/s00572-020-01012-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
The influence of mycorrhizal symbiosis on ecosystem processes depends on the mycorrhizal type and status of plants. Early research hypothesized that the proportion of arbuscular mycorrhizal (AM) species decreases and of ectomycorrhizal (ECM) and ericoid mycorrhizal (ERM) species increases along increasing elevations and latitudes. However, there is very scarce information about this pattern along elevation gradients. We aimed to test this hypothesis and to describe the trends in plant mycorrhizal status by examining the Pyrenean mountain range (from 400 to 3400 m asl). The distribution of plant mycorrhizal types: AM, ECM, ERM, and non-mycorrhizal (NM) and status (obligately, OM, or facultatively, FM mycorrhizal plants, FM) were identified based on the Pyrenean Floristic Atlas and analyzed for climatic and edaphic drivers. The proportion of AM plants decreased slightly with elevation, while ECM species peaked at 1000 m asl. The proportion of ERM and NM plant species rose with increasing elevation. The proportion of FM species increased, and OM species decreased with increasing elevation. The change of AM and ECM species, and OM and FM species, along the elevational gradient, corresponds broadly to changes along the latitudinal gradient, driven by a combination of climatic and edaphic factors. Differently, the elevational occurrence of NM plant species is mainly driven only by climatic factors (low temperature) and that of ERM species by only edaphic factors (low pH). Large-scale macroecological studies (≥ 50 km grid cell) well reflect the effects of climate on the distribution of plant mycorrhizal traits, but local data (≤ 1 km grid cell) are needed to understand the effects of soil conditions and land use.
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Affiliation(s)
- C Guillermo Bueno
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005, Tartu, Estonia.
| | - M Gerz
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005, Tartu, Estonia
| | - M Moora
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005, Tartu, Estonia
| | - D Leon
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005, Tartu, Estonia
| | - D Gomez-Garcia
- Pyrenean Institute of Ecology (IPE-CSIC), Av. Ntra. Sra. de la Victoria, S/N, 22700, Jaca, Spain
| | - D García de Leon
- Department of Life Sciences, University of Alcalá, Alcalá de Henares, 28805, Spain
| | - X Font
- Plant Biodiversity Resource Centre, University of Barcelona, Carrer de Baldiri Reixac 2, 08028, Barcelona, Spain
| | - Saleh Al-Quraishy
- Zoology Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Wael N Hozzein
- Zoology Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - M Zobel
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005, Tartu, Estonia
- Zoology Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
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15
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Schönauer T, Thomä SLJ, Kaiser L, Zobel M, Kempe R. General Synthesis of Secondary Alkylamines by Reductive Alkylation of Nitriles by Aldehydes and Ketones. Chemistry 2021; 27:1609-1614. [PMID: 33236790 PMCID: PMC7898800 DOI: 10.1002/chem.202004755] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 10/29/2020] [Revised: 11/24/2020] [Indexed: 12/14/2022]
Abstract
The development of C-N bond formation reactions is highly desirable due to their importance in biology and chemistry. Recent progress in 3d metal catalysis is indicative of unique selectivity patterns that may permit solving challenges of chemical synthesis. We report here on a catalytic C-N bond formation reaction-the reductive alkylation of nitriles. Aldehydes or ketones and nitriles, all abundantly available and low-cost starting materials, undergo a reductive coupling to form secondary alkylamines and inexpensive hydrogen is used as the reducing agent. The reaction has a very broad scope and many functional groups, including hydrogenation-sensitive examples, are tolerated. We developed a novel cobalt catalyst, which is nanostructured, reusable, and easy to handle. The key seems the earth-abundant metal in combination with a porous support material, N-doped SiC, synthesized from acrylonitrile and a commercially available polycarbosilane.
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Affiliation(s)
- Timon Schönauer
- Inorganic Chemistry II—Catalyst DesignUniversity of Bayreuth95440BayreuthGermany
| | - Sabrina L. J. Thomä
- Mesostructured MaterialsDepartment of ChemistryUniversity of Bayreuth95440BayreuthGermany
| | - Leah Kaiser
- Inorganic Chemistry II—Catalyst DesignUniversity of Bayreuth95440BayreuthGermany
| | - Mirijam Zobel
- Mesostructured MaterialsDepartment of ChemistryUniversity of Bayreuth95440BayreuthGermany
| | - Rhett Kempe
- Inorganic Chemistry II—Catalyst DesignUniversity of Bayreuth95440BayreuthGermany
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16
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Eckardt M, Thomä SLJ, Dulle M, Hörner G, Weber B, Förster S, Zobel M. Long-Term Colloidally Stable Aqueous Dispersions of ≤5 nm Spinel Ferrite Nanoparticles. ChemistryOpen 2020; 9:1214-1220. [PMID: 33294306 PMCID: PMC7692645 DOI: 10.1002/open.202000313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 10/30/2020] [Indexed: 01/03/2023] Open
Abstract
Applications in biomedicine and ferrofluids, for instance, require long-term colloidally stable, concentrated aqueous dispersions of magnetic, biocompatible nanoparticles. Iron oxide and related spinel ferrite nanoparticles stabilized with organic molecules allow fine-tuning of magnetic properties via cation substitution and water-dispersibility. Here, we synthesize≤5 nm iron oxide and spinel ferrite nanoparticles, capped with citrate, betaine and phosphocholine, in a one-pot strategy. We present a robust approach combining elemental (CHN) and thermal gravimetric analysis (TGA) to quantify the ratio of residual solvent molecules and organic stabilizers on the particle surface, being of particular accuracy for ligands with heteroatoms compared to the solvent. SAXS experiments demonstrate the long-term colloidal stability of our aqueous iron oxide and spinel ferrite nanoparticle dispersions for at least 3 months. By the use of SAXS we approved directly the colloidal stability of the nanoparticle dispersions for high concentrations up to 100 g L-1.
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Affiliation(s)
- Mirco Eckardt
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Sabrina L J Thomä
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Martin Dulle
- JCNS-1/IBI-8: Neutron Scattering and Biological Matter, Forschungszentrum Jülich Gmbh, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
| | - Gerald Hörner
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Birgit Weber
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Stefan Förster
- JCNS-1/IBI-8: Neutron Scattering and Biological Matter, Forschungszentrum Jülich Gmbh, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
| | - Mirijam Zobel
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
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17
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Prinz N, Schwensow L, Wendholt S, Jentys A, Bauer M, Kleist W, Zobel M. Hard X-ray-based techniques for structural investigations of CO 2 methanation catalysts prepared by MOF decomposition. Nanoscale 2020; 12:15800-15813. [PMID: 32691790 DOI: 10.1039/d0nr01750g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Thermal decomposition of metal-organic framework (MOF) precursors is a recent method to create well-dispersed metal centers within active catalyst materials with enhanced stability, as required for dynamic operation conditions in light of challenges caused by the renewable energy supply. Here, we use a hard X-ray-based toolbox of pair distribution function (PDF) and X-ray absorption spectroscopy (XAS) analysis combined with X-ray diffraction and catalytic activity tests to investigate structure-activity correlations of methanation catalysts obtained by thermal decomposition of a Ni(BDC)(PNO) MOF precursor. Increasing the decomposition temperature from 350 to 500 °C resulted in Nifcc nanoparticles with increasing particle sizes, alongside a decrease in Ni2+ species and strain-induced peak broadening. For lower temperatures and inert atmosphere, Ni3C and NiO phases co-existed. A graphitic shell stabilized the Ni particles. Compared to an inert atmosphere, reducing conditions led to larger particles and a faster decomposition of the MOF precursor. Catalytic studies revealed that the decomposition at an intermediate temperature of 375 °C in 5% H2/He is the best set of parameters to obtain high specific surface areas while maintaining particle sizes that feature many active Ni centers for the formation of CH4.
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Affiliation(s)
- Nils Prinz
- Chemistry Department, University Bayreuth, Universitätsstr. 30, Bayreuth 95447, Germany.
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18
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Pham TA, Coulthard RM, Zobel M, Maiti A, Buchsbaum SF, Loeb C, Campbell PG, Plata DL, Wood BC, Fornasiero F, Meshot ER. Structural Anomalies and Electronic Properties of an Ionic Liquid under Nanoscale Confinement. J Phys Chem Lett 2020; 11:6150-6155. [PMID: 32645262 DOI: 10.1021/acs.jpclett.0c01810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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
Ionic liquids (ILs) promise far greater electrochemical performance compared to aqueous systems, yet key physicochemical properties governing their assembly at interfaces within commonly used graphitic nanopores remain poorly understood. In this work, we combine synchrotron X-ray scattering with first-principles molecular dynamics simulations to unravel key structural characteristics of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([TFSI]-) ionic liquids confined in carbon slit pores. X-ray scattering reveals selective pore filling due to size exclusion, while filled pores exhibit disruption in the IL intermolecular structure, the extent of which increases for narrower slit pores. First-principles simulations corroborate this finding and quantitatively describe how perturbations in the local IL structure, particularly the hydrogen-bond network, depend strongly on the degree of confinement. Despite significant deviations in structure under confinement, electrochemical stability remains intact, which is important for energy storage based on nanoporous carbon electrodes (e.g., supercapacitors).
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Affiliation(s)
- Tuan Anh Pham
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Riley M Coulthard
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Mirijam Zobel
- Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Amitesh Maiti
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Steven F Buchsbaum
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Colin Loeb
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Patrick G Campbell
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Desirée L Plata
- Department of Civil and Environmental Engineering, MIT, Cambridge, Massachusetts 02142, United States
| | - Brandon C Wood
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Francesco Fornasiero
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Eric R Meshot
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
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19
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Zobel M, Thomä S, Prinz N. Pushing data quality for laboratory pair distribution function experiments. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319089319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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20
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Thomä S, Krauss S, Eckardt M, Chater P, Zobel M. Atomic insight into hydration shells around facetted iron oxide nanoparticles. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319089125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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21
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Prinz N, Schwensow L, Kleist W, Zobel M. Structural insights into methanation catalysts from MOF precursors via PDF. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319092453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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22
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Krauss SW, Schweins R, Magerl A, Zobel M. Free-film small-angle neutron scattering: a novel container-free in situ sample environment with minimized H/D exchange. J Appl Crystallogr 2019; 52:284-288. [PMID: 30996715 PMCID: PMC6448684 DOI: 10.1107/s1600576719000906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/24/2018] [Accepted: 01/18/2019] [Indexed: 11/10/2022] Open
Abstract
The development of a container-free sample environment which is particularly well suited for in situ reaction studies of liquid samples by small-angle neutron scattering and related techniques is reported. Hydrogen exchange with the humidity from air is reduced by an encapsulating setup in a bag filled with an inert gas such as He. The effectiveness of this measure is quantitatively accessed by infrared absorption and gravimetry, and further correlated with neutron scattering.
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Affiliation(s)
- Sebastian W Krauss
- Chemistry Department, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Ralf Schweins
- Institut Laue-Langevin, DS/LSS, 71 Avenue des Martyrs, Grenoble 38000, France
| | - Andreas Magerl
- Physics Department, Friedrich-Alexander-University Erlangen-Nuremberg, 91052 Erlangen, Germany
| | - Mirijam Zobel
- Chemistry Department, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
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23
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Thomae SLJ, Prinz N, Hartmann T, Teck M, Correll S, Zobel M. Pushing data quality for laboratory pair distribution function experiments. Rev Sci Instrum 2019; 90:043905. [PMID: 31043011 DOI: 10.1063/1.5093714] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
Over the last decade, some studies with laboratory pair distribution function (PDF) data emerged. Yet, limited Qmax or instrumental resolution impeded in-depth structural refinements. With more advanced detector technologies, the question arose how to design novel PDF equipment for laboratories that will allow decent PDF refinements over r = 1-70 Å. It is crucial to reflect the essential requirements, namely, monochromatic X-rays, suppression of air scattering, instrumental resolution, and overall measurement times. The result is a novel PDF setup based on a STOE STADI P powder diffractometer in transmission-/Debye-Scherrer geometry with monochromatic Ag Kα1 radiation, featuring a MYTHEN2 4K detector covering a Q range of 0.3-20.5 Å-1. PDF data are collected in a moving PDF mode within 6 h. Structural signatures of liquids can be satisfactorily resolved in the PDF as shown for the ionic liquid hmimPF6. The high instrumental resolution is mirrored in low qdamp values determined from LaB6 measurements. PDF data from a powder sample of ca. 7 nm TiO2 nanoparticles were successfully refined over up to 70 Å with goodness-of-fit values Rw < 0.22 (respectively Rw = 0.18 over 30 Å), thanks to the low background and high instrumental resolution, hereby enlarging the accessible r range by several tens of Angstroms compared to previous laboratory PDF studies.
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Affiliation(s)
- Sabrina L J Thomae
- Chemistry Department, University Bayreuth, Universitaetsstr. 30, Bayreuth 95447, Germany
| | - Nils Prinz
- Chemistry Department, University Bayreuth, Universitaetsstr. 30, Bayreuth 95447, Germany
| | | | - Michael Teck
- STOE & Cie GmbH, Hilpertstr. 10, Darmstadt 64295, Germany
| | - Sascha Correll
- STOE & Cie GmbH, Hilpertstr. 10, Darmstadt 64295, Germany
| | - Mirijam Zobel
- Chemistry Department, University Bayreuth, Universitaetsstr. 30, Bayreuth 95447, Germany
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24
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Thomä SLJ, Krauss SW, Eckardt M, Chater P, Zobel M. Atomic insight into hydration shells around facetted nanoparticles. Nat Commun 2019; 10:995. [PMID: 30824693 PMCID: PMC6397290 DOI: 10.1038/s41467-019-09007-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [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: 10/16/2018] [Accepted: 02/08/2019] [Indexed: 01/10/2023] Open
Abstract
Nanoparticles in solution interact with their surroundings via hydration shells. Although the structure of these shells is used to explain nanoscopic properties, experimental structural insight is still missing. Here we show how to access the hydration shell structures around colloidal nanoparticles in scattering experiments. For this, we synthesize variably functionalized magnetic iron oxide nanoparticle dispersions. Irrespective of the capping agent, we identify three distinct interatomic distances within 2.5 Å from the particle surface which belong to dissociatively and molecularly adsorbed water molecules, based on theoretical predictions. A weaker restructured hydration shell extends up to 15 Å. Our results show that the crystal structure dictates the hydration shell structure. Surprisingly, facets of 7 and 15 nm particles behave like planar surfaces. These findings bridge the large gap between spectroscopic studies on hydrogen bond networks and theoretical advances in solvation science.
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Affiliation(s)
- Sabrina L J Thomä
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Sebastian W Krauss
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Mirco Eckardt
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany
| | - Phil Chater
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Mirijam Zobel
- Department of Chemistry, University of Bayreuth, Universitätsstr.30, 95440, Bayreuth, Germany.
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25
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Ertl M, Andronescu C, Moir J, Zobel M, Wagner FE, Barwe S, Ozin G, Schuhmann W, Breu J. Oxygen Evolution Catalysis with Mössbauerite-A Trivalent Iron-Only Layered Double Hydroxide. Chemistry 2018; 24:9004-9008. [DOI: 10.1002/chem.201801938] [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] [Received: 04/18/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Michael Ertl
- Bavarian Polymer Institute and Department of Chemistry; University of Bayreuth; Universitätsstr. 30 95440 Bayreuth Germany
| | - Corina Andronescu
- Analytical Chemistry-Center for Electrochemical Sciences; Ruhr-University Bochum; Universitätsstr. 150 44780 Bochum Germany
| | - Jonathon Moir
- Department of Chemistry; University of Toronto; 80 St. George Street M5S3H6 Toronto Canada
| | - Mirijam Zobel
- Solid State Chemistry-Mesostructured Materials; University of Bayreuth; Universitätsstr. 30 95440 Bayreuth Germany
| | - Friedrich E. Wagner
- Physics Department e15; Technical University Munich; James-Franck-Str. 85748 Garching Germany
| | - Stefan Barwe
- Analytical Chemistry-Center for Electrochemical Sciences; Ruhr-University Bochum; Universitätsstr. 150 44780 Bochum Germany
| | - Geoffrey Ozin
- Department of Chemistry; University of Toronto; 80 St. George Street M5S3H6 Toronto Canada
| | - Wolfgang Schuhmann
- Analytical Chemistry-Center for Electrochemical Sciences; Ruhr-University Bochum; Universitätsstr. 150 44780 Bochum Germany
| | - Josef Breu
- Bavarian Polymer Institute and Department of Chemistry; University of Bayreuth; Universitätsstr. 30 95440 Bayreuth Germany
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26
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Zobel M. Observing structural reorientations at solvent–nanoparticle interfaces by X-ray diffraction – putting water in the spotlight. Acta Crystallogr A Found Adv 2016; 72:621-631. [DOI: 10.1107/s2053273316013516] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/22/2016] [Indexed: 01/29/2023]
Abstract
Nanoparticles are attractive in a wide range of research genres due to their size-dependent properties, which can be in contrast to those of micrometre-sized colloids or bulk materials. This may be attributed, in part, to their large surface-to-volume ratio and quantum confinement effects. There is a growing awareness that stress and strain at the particle surface contribute to their behaviour and this has been included in the structural models of nanoparticles for some time. One significant oversight in this field, however, has been the fact that the particle surface affects its surroundings in an equally important manner. It should be emphasized here that the surface areas involved are huge and, therefore, a significant proportion of solvent molecules are affected. Experimental evidence of this is emerging, where suitable techniques to probe the structural correlations of liquids at nanoparticle surfaces have only recently been developed. The recent validation of solvation shells around nanoparticles has been a significant milestone in advancing this concept. Restructured ordering of solvent molecules at the surfaces of nanoparticles has an influence on the entire panoply of solvent–particle interactions during, for example, particle formation and growth, adhesion forces in industrial filtration, and activities of nanoparticle–enzyme complexes. This article gives an overview of the advances made in solvent–nanoparticle interface research in recent years: from description of the structure of bulk solids and liquidsviamacroscopic planar surfaces, to the detection of nanoscopic restructuring effects. Water–nanoparticle interfaces are given specific attention to illustrate and highlight their similarity to biological systems.
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27
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Zobel M, Windmüller A, Schmidt EM, Götz K, Milek T, Zahn D, Kimber SAJ, Hudspeth JM, Neder RB. The evolution of crystalline ordering for ligand-ornamented zinc oxide nanoparticles. CrystEngComm 2016. [DOI: 10.1039/c5ce02099a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Davison J, Moora M, Öpik M, Adholeya A, Ainsaar L, Bâ A, Burla S, Diedhiou AG, Hiiesalu I, Jairus T, Johnson NC, Kane A, Koorem K, Kochar M, Ndiaye C, Pärtel M, Reier Ü, Saks Ü, Singh R, Vasar M, Zobel M. FUNGAL SYMBIONTS. Global assessment of arbuscular mycorrhizal fungus diversity reveals very low endemism. Science 2015. [PMID: 26315436 DOI: 10.5061/dryad.2m15n] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The global biogeography of microorganisms remains largely unknown, in contrast to the well-studied diversity patterns of macroorganisms. We used arbuscular mycorrhizal (AM) fungus DNA from 1014 plant-root samples collected worldwide to determine the global distribution of these plant symbionts. We found that AM fungal communities reflected local environmental conditions and the spatial distance between sites. However, despite AM fungi apparently possessing limited dispersal ability, we found 93% of taxa on multiple continents and 34% on all six continents surveyed. This contrasts with the high spatial turnover of other fungal taxa and with the endemism displayed by plants at the global scale. We suggest that the biogeography of AM fungi is driven by unexpectedly efficient dispersal, probably via both abiotic and biotic vectors, including humans.
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Affiliation(s)
- J Davison
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - M Moora
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - M Öpik
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - A Adholeya
- Centre for Mycorrhizal Research, The Energy and Resources Institute (TERI), India Habitat Centre, Lodhi Road, New Delhi 110 003, India
| | - L Ainsaar
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - A Bâ
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Unité Mixte de Recherche 113, Laboratoire de Biologie et Physiologie Végétales, Faculté des Sciences Exactes et Naturelles, Université des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe (French West Indies)
| | - S Burla
- Centre for Mycorrhizal Research, The Energy and Resources Institute (TERI), India Habitat Centre, Lodhi Road, New Delhi 110 003, India
| | - A G Diedhiou
- Laboratoire Commun de Microbiologie de l'Institut de Recherche pour le Développement-Institut Sénégalais de Recherches Agricoles-Université Cheikh Anta Diop (UCAD), Département de Biologie Végétale, UCAD, BP 5005 Dakar, Sénégal
| | - I Hiiesalu
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia. Institute of Botany, Czech Academy of Sciences, Dukelska 135, 379 01 Trebon, Czech Republic
| | - T Jairus
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - N C Johnson
- School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011-5694, USA
| | - A Kane
- Laboratoire Commun de Microbiologie de l'Institut de Recherche pour le Développement-Institut Sénégalais de Recherches Agricoles-Université Cheikh Anta Diop (UCAD), Département de Biologie Végétale, UCAD, BP 5005 Dakar, Sénégal
| | - K Koorem
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia. Netherlands Institute of Ecology, Droevendaalsesteeg 10, 6708 PB Wageningen, Netherlands
| | - M Kochar
- TERI-Deakin Nano Biotechnology Centre, Biotechnology and Management of Bioresources Division, TERI, India Habitat Centre, Lodhi Road, New Delhi 110 003, India
| | - C Ndiaye
- Laboratoire Commun de Microbiologie de l'Institut de Recherche pour le Développement-Institut Sénégalais de Recherches Agricoles-Université Cheikh Anta Diop (UCAD), Département de Biologie Végétale, UCAD, BP 5005 Dakar, Sénégal
| | - M Pärtel
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - Ü Reier
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - Ü Saks
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - R Singh
- TERI-Deakin Nano Biotechnology Centre, Biotechnology and Management of Bioresources Division, TERI, India Habitat Centre, Lodhi Road, New Delhi 110 003, India
| | - M Vasar
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
| | - M Zobel
- Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia
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Davison J, Moora M, Opik M, Adholeya A, Ainsaar L, Ba A, Burla S, Diedhiou AG, Hiiesalu I, Jairus T, Johnson NC, Kane A, Koorem K, Kochar M, Ndiaye C, Partel M, Reier U, Saks U, Singh R, Vasar M, Zobel M. Global assessment of arbuscular mycorrhizal fungus diversity reveals very low endemism. Science 2015; 349:970-3. [DOI: 10.1126/science.aab1161] [Citation(s) in RCA: 492] [Impact Index Per Article: 54.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zobel M, Kimber SAJ, Neder RB. Solvent-nanoparticle interfaces – source of solvent restructuring in solvation shells and disorder in nanoparticles. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315098666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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31
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Schaniel D, Bendeif EE, Gansmuller A, Hsieh KY, Pillet S, Woike T, Zobel M, Neder R, Bouazaoui M, Hamzaoui HE. Structure determination of molecular nanocomposites by combining pair distribution function analysis and solid-state NMR. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315094292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Bendeif EE, Gansmuller A, Hsieh KY, Pillet S, Woike T, Zobel M, Neder RB, Bouazaoui M, El Hamzaoui H, Schaniel D. Structure determination of molecular nanocomposites by combining pair distribution function analysis and solid-state NMR. RSC Adv 2015. [DOI: 10.1039/c4ra11470a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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] Open
Abstract
Total X-ray scattering coupled to atomic pair distribution function analysis (PDF) and solid state NMR allowed the identification and structural characterisation of isolated molecules and nanocrystals of sodium nitroprusside confined in mesoporous silica.
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Zobel M, Neder R. Magic Sized Clusters in ZnO Nanoparticle Formation – an in-situ PDF study. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314091256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Semiconductor nanoparticles (NP) such as zinc oxide (ZnO) are commonly produced in sol-gel processes. The final NP powders are well characterized with respect to their crystallinity, which fundamentally governs their physical and chemical properties. Nevertheless, the nucleation process and the evolution of crystallinity of the nucleating NPs is not yet understood [1]. With the advent of the Rapid Acquisition Pair Distribution Function (PDF) method, time-resolved PDF studies have become possible, and the distinction between molecular clusters and nanoparticles in 1 M aqueous solutions of metal oxide NPs [2] has been demonstrated. However, nucleation in dilute sol-gel processes in more complex organic solutions remains untackled [1]. Our experiments are, to our knowledge, the first in-situ PDF studies in organic solvents. We used a 30 mM ethanolic solution of zinc acetate dihydrate. Several hours after the addition of the organic base tetramethylammonium hydroxide, monodisperse ZnO powders can be obtained. However, directly upon the base addition primary tetrahedral precursors Zn4OAc6 form. Approx. 1 hour later, they evolve into stable magic sized clusters (MSC) of 1.3 nm diameter and wurtzitic structure. Though known to exist for II-VI semiconductor NP such as CdSe [3], MSCs have not been demonstrated for ZnO before. With ongoing reaction time, the final spherical NPs of 2.5 nm diameter evolve at the expense of the MSCs and exist for several hours without undergoing further growth. SAXS studies confirm the PDF data. Fig. 1 shows the experimental PDFs and their fits. The fits are multiphase models of the precursor, the MSC and NP. The solvent shows intermolecular ordering effects whose contribution to the PDF was modelled by a low-frequency wave function. The MSC and NP sketches show a view along the crystallographic c-axis. Based upon these state-of-the art in-situ PDF studies, we suggest a nucleation model based on the existence of magic-sized clusters.
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Short S, Ford H, Zobel M, Wang J, Papillon S, Pontarelli E, Bell B, Grishin A, Ford H. EP1 Receptor Deficiency Protects Mice From Gut Barrier Breakdown During LPS-Induced Peritonitis. J Surg Res 2013. [DOI: 10.1016/j.jss.2012.10.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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36
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Yang Y, Lee K, Zobel M, Maćković M, Unruh T, Spiecker E, Schmuki P. Formation of highly ordered VO2 nanotubular/nanoporous layers and their supercooling effect in phase transitions. Adv Mater 2012; 24:1571-1575. [PMID: 22351624 DOI: 10.1002/adma.201200073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2012] [Indexed: 05/31/2023]
Abstract
The fabrication of self-organized VO(2) nanotubular/nanoporous layers is demonstrated by self-organizing anodization, followed by a suitable heat treatment. These VO(2) layers show a reversible metal to insulator transition (MIT) at 70 and 44 °C, when heating and cooling, respectively.
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Affiliation(s)
- Yang Yang
- Department of Materials Science, University of Erlangen-Nuremberg, Martensstrasse 7, Erlangen, Germany
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Opik M, Vanatoa A, Vanatoa E, Moora M, Davison J, Kalwij JM, Reier U, Zobel M. The online database MaarjAM reveals global and ecosystemic distribution patterns in arbuscular mycorrhizal fungi (Glomeromycota). New Phytol 2010; 188:223-41. [PMID: 20561207 DOI: 10.1111/j.1469-8137.2010.03334.x] [Citation(s) in RCA: 482] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
• Here, we describe a new database, MaarjAM, that summarizes publicly available Glomeromycota DNA sequence data and associated metadata. The goal of the database is to facilitate the description of distribution and richness patterns in this group of fungi. • Small subunit (SSU) rRNA gene sequences and available metadata were collated from all suitable taxonomic and ecological publications. These data have been made accessible in an open-access database (http://maarjam.botany.ut.ee). • Two hundred and eighty-two SSU rRNA gene virtual taxa (VT) were described based on a comprehensive phylogenetic analysis of all collated Glomeromycota sequences. Two-thirds of VT showed limited distribution ranges, occurring in single current or historic continents or climatic zones. Those VT that associated with a taxonomically wide range of host plants also tended to have a wide geographical distribution, and vice versa. No relationships were detected between VT richness and latitude, elevation or vascular plant richness. • The collated Glomeromycota molecular diversity data suggest limited distribution ranges in most Glomeromycota taxa and a positive relationship between the width of a taxon's geographical range and its host taxonomic range. Inconsistencies between molecular and traditional taxonomy of Glomeromycota, and shortage of data from major continents and ecosystems, are highlighted.
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Affiliation(s)
- M Opik
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St., 51005 Tartu, Estonia.
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Hammen VC, Biesmeijer JC, Bommarco R, Budrys E, Christensen TR, Fronzek S, Grabaum R, Jaksic P, Klotz S, Kramarz P, Kröel-Dulay G, Kühn I, Mirtl M, Moora M, Petanidou T, Pino J, Potts SG, Rortais A, Schulze CH, Steffan-Dewenter I, Stout J, Szentgyörgyi H, Vighi M, Vujic A, Westphal C, Wolf T, Zavala G, Zobel M, Settele J, Kunin WE. Establishment of a cross-European field site network in the ALARM project for assessing large-scale changes in biodiversity. Environ Monit Assess 2010; 164:337-348. [PMID: 19365607 DOI: 10.1007/s10661-009-0896-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2008] [Accepted: 03/10/2009] [Indexed: 05/27/2023]
Abstract
The field site network (FSN) plays a central role in conducting joint research within all Assessing Large-scale Risks for biodiversity with tested Methods (ALARM) modules and provides a mechanism for integrating research on different topics in ALARM on the same site for measuring multiple impacts on biodiversity. The network covers most European climates and biogeographic regions, from Mediterranean through central European and boreal to subarctic. The project links databases with the European-wide field site network FSN, including geographic information system (GIS)-based information to characterise the test location for ALARM researchers for joint on-site research. Maps are provided in a standardised way and merged with other site-specific information. The application of GIS for these field sites and the information management promotes the use of the FSN for research and to disseminate the results. We conclude that ALARM FSN sites together with other research sites in Europe jointly could be used as a future backbone for research proposals.
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Affiliation(s)
- V C Hammen
- Department of Community Ecology, Centre for Environmental Research (UFZ) Leipzig-Halle, Theodor-Lieser-Str. 4, 06120, Halle (Saale), Germany.
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Öpik M, Metsis M, Daniell TJ, Zobel M, Moora M. Large-scale parallel 454 sequencing reveals host ecological group specificity of arbuscular mycorrhizal fungi in a boreonemoral forest. New Phytol 2009; 184:424-437. [PMID: 19558424 DOI: 10.1111/j.1469-8137.2009.02920.x] [Citation(s) in RCA: 199] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
* Knowledge of the diversity of arbuscular mycorrhizal fungi (AMF) in natural ecosystems is a major bottleneck in mycorrhizal ecology. Here, we aimed to apply 454 sequencing--providing a new level of descriptive power--to assess the AMF diversity in a boreonemoral forest. * 454 sequencing reads of the small subunit ribosomal RNA (SSU rRNA) gene of Glomeromycota were assigned to sequence groups by blast searches against a custom-made annotated sequence database. * We detected 47 AMF taxa in the roots of 10 plant species in a 10 x 10 m plot, which is almost the same as the number of plant species in the whole studied forest. There was a significant difference between AMF communities in the roots of forest specialist plant species and in the roots of habitat generalist plant species. Forest plant species hosted 22 specialist AMF taxa, and the generalist plants shared all but one AMF taxon with forest plants, including globally distributed generalist fungi. These AMF taxa that have been globally recorded only in forest ecosystems were significantly over-represented in the roots of forest plant species. * Our findings suggest that partner specificity in AM symbiosis may occur at the level of ecological groups, rather than at the species level, of both plant and fungal partners.
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Affiliation(s)
- M Öpik
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St., 51005 Tartu, Estonia
- Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK
| | - M Metsis
- Tallinn University of Technology, Centre for Biology of Integrated Systems, Akadeemia tee 15A, Tallinn 12618, Estonia
- BiotaP LLC, Akadeemia tee 15, Tallinn 12618, Estonia
| | - T J Daniell
- Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK
| | - M Zobel
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St., 51005 Tartu, Estonia
| | - M Moora
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St., 51005 Tartu, Estonia
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Dormann CF, Schweiger O, Arens P, Augenstein I, Aviron S, Bailey D, Baudry J, Billeter R, Bugter R, Bukácek R, Burel F, Cerny M, Cock RD, De Blust G, DeFilippi R, Diekötter T, Dirksen J, Durka W, Edwards PJ, Frenzel M, Hamersky R, Hendrickx F, Herzog F, Klotz S, Koolstra B, Lausch A, Le Coeur D, Liira J, Maelfait JP, Opdam P, Roubalova M, Schermann-Legionnet A, Schermann N, Schmidt T, Smulders MJM, Speelmans M, Simova P, Verboom J, van Wingerden W, Zobel M. Prediction uncertainty of environmental change effects on temperate European biodiversity. Ecol Lett 2007; 11:235-44. [PMID: 18070098 DOI: 10.1111/j.1461-0248.2007.01142.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Observed patterns of species richness at landscape scale (gamma diversity) cannot always be attributed to a specific set of explanatory variables, but rather different alternative explanatory statistical models of similar quality may exist. Therefore predictions of the effects of environmental change (such as in climate or land cover) on biodiversity may differ considerably, depending on the chosen set of explanatory variables. Here we use multimodel prediction to evaluate effects of climate, land-use intensity and landscape structure on species richness in each of seven groups of organisms (plants, birds, spiders, wild bees, ground beetles, true bugs and hoverflies) in temperate Europe. We contrast this approach with traditional best-model predictions, which we show, using cross-validation, to have inferior prediction accuracy. Multimodel inference changed the importance of some environmental variables in comparison with the best model, and accordingly gave deviating predictions for environmental change effects. Overall, prediction uncertainty for the multimodel approach was only slightly higher than that of the best model, and absolute changes in predicted species richness were also comparable. Richness predictions varied generally more for the impact of climate change than for land-use change at the coarse scale of our study. Overall, our study indicates that the uncertainty introduced to environmental change predictions through uncertainty in model selection both qualitatively and quantitatively affects species richness projections.
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Affiliation(s)
- Carsten F Dormann
- Computational Landscape Ecology, UFZ Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany.
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Billeter R, Liira J, Bailey D, Bugter R, Arens P, Augenstein I, Aviron S, Baudry J, Bukacek R, Burel F, Cerny M, De Blust G, De Cock R, Diekötter T, Dietz H, Dirksen J, Dormann C, Durka W, Frenzel M, Hamersky R, Hendrickx F, Herzog F, Klotz S, Koolstra B, Lausch A, Le Coeur D, Maelfait JP, Opdam P, Roubalova M, Schermann A, Schermann N, Schmidt T, Schweiger O, Smulders M, Speelmans M, Simova P, Verboom J, Van Wingerden W, Zobel M, Edwards P. Indicators for biodiversity in agricultural landscapes: a pan-European study. J Appl Ecol 2007. [DOI: 10.1111/j.1365-2664.2007.01393.x] [Citation(s) in RCA: 464] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ługowska A, Berger J, Tylki-Szymańska A, Löschl B, Molzer B, Zobel M, Czartoryska B. Molecular and phenotypic characteristics of metachromatic leukodystrophy patients from Poland. Clin Genet 2005; 68:48-54. [PMID: 15952986 DOI: 10.1111/j.1399-0004.2005.00451.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/27/2022]
Abstract
The occurrence and genotype-phenotype correlations of the eight most common mutations in the arylsulfatase A (ARSA) gene were studied in 43 unrelated Polish patients suffering from different types of metachromatic leukodystrophy (MLD). Screening for mutations p.R84Q, p.S96F, c.459+1G>A, p.I179S, p.A212V, c.1204+1G>A, p.P426L, and c.1401-1411del allowed the identification of 53.5% of the mutant alleles. In the whole investigated group of patients, mutations c.459+1G>A and p.P426L were the most frequent, 19 and 17%, respectively. The prevalence of the third most frequent mutation, i.e. p.I179S (13%), seems to be higher than that in other populations. The incidence of c.1204+1G>A was 5%, which is higher than reported earlier (2%). It seems that p.I179S and c.1204+1G>A are more prevalent in MLD patients from Poland than from other countries. In the group examined by us, mutations p.R84Q, p.S96F, p.A212V, and c.1401-1411del were not detected; thus, 46.5% of MLD alleles remained unidentified. This indicates that other, novel or already described, but rare, mutations exist in Polish population. In late infantile homozygotes for c.459+1G>A and one homozygote for c.1204+1G>A, first clinical symptom was motor deterioration. In adult homozygotes for p.P426L, the disease onset manifested as gait disturbances, followed by choreoathetotic movements, difficulties in swallowing, dysarthria, tremor, and nystagmus. In the carriers of the p.I179S mutation, the hallmark of the clinical picture was psychotic disturbances.
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Affiliation(s)
- A Ługowska
- Institute of Psychiatry and Neurology, Department of Genetics, Warsaw, Poland
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Schneider G, Zobel M. [Parents' role in pediatric care: when the child must be hospitalized]. Pflege Z 2001; 54:181-3. [PMID: 11310331] [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: 02/19/2023]
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44
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Molzer B, Sundt-Heller R, Kainz-Korschinsky M, Zobel M. Elevated sulfatide excretion in heterozygotes of metachromatic leukodystrophy: Dependence on reduction of arylsulfatase a activity. ACTA ACUST UNITED AC 1992; 44:523-6. [PMID: 1359786 DOI: 10.1002/ajmg.1320440429] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [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: 11/07/2022]
Abstract
Sulfatide excretion in urine and arylsulfatase A (ASA) activity in leukocytes were determined in 10 homozygotes of metachromatic leukodystrophy (MLD), 7 obligate and 5 facultative MLD heterozygotes, 6 low ASA subjects (not related to MLD homozygotes), and in 9 controls. As compared to controls (sulfatides: 0-2 nmol/mg lipid; ASA: 101-287 nmol p-nitrocatechol/mg protein/hr), MLD homozygotes displayed highly increased sulfatide excretions (27-280 nmol) and low residual ASA activities (0-13 nmol). Of 12 MLD heterozygotes (ASA: 18-87 nmol) 10 showed increased sulfatides (3-24 nmol). All heterozygotes with ASA activity < 60 nmol (n = 8) had elevated sulfatide excretions (4-24 nmol). Thus, reduction of ASA activity below 40% of the mean value of controls seems to be the critical threshold for elevated sulfatide excretion in MLD heterozygotes. The low ASA subjects (ASA in the heterozygote range) excreted sulfatides in the control range, even those with ASA activities < 60 nmoles (n = 3; including a definite homozygote for ASA-pseudodeficiency; ASA:25 nmol). Statistical evaluation of sulfatide excretion and ASA activity in all subjects (n = 37) revealed a significant inverse relation (Spearman rank correlation; R = 0.8278, P < 0.001). The finding of elevated sulfatide excretion in certain MLD heterozygotes might point to increase of sulfatides also in the nervous system.
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Affiliation(s)
- B Molzer
- Division of Neurochemistry, University of Vienna, Austria
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Molzer B, Gieselmann V, Stöckler S, Zobel M, Minauf M, Reisecker F, Freimüller M, Artner V, Bernheimer H. Metachromatic leukodystrophy (MLD): Phenotype and genotype in late onset cases. Neurochem Int 1992. [DOI: 10.1016/0197-0186(92)92109-h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wittkowski J, Zobel M. [Correlates of life satisfaction in middle age]. Z Gerontol 1982; 15:259-64. [PMID: 7157934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A sample of 104 men and 114 women aged 42;8 to 56;6 years was interviewed about their life satisfaction, responded to a life satisfaction questionnaire and gave informations about biographical experiences in the areas "experiences of loss", "indicators of aging", "experiences of bodily vulnerability" and "death-related experiences". A negative relationship was found between satisfaction with one's past and experiences of loss as well as between satisfaction with one's presence and indicators of aging. Life satisfaction which is directed to the presence is stronger in men between 43 and 46 years than in men between 53 and 56 years. Life satisfaction which is directed to the past is stronger in men between 53 and 56 years. Subjects with a small number of negative life experiences (the "psychologically young") had a higher life satisfaction than subjects with a great deal of negative life experiences (the "psychologically old"). Results were discussed in respect to age-dependent changes in life satisfaction and in respect to a more relative view of the age variable.
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Meinhart P, Zobel M, Jakisch L. [Efficient spirogram evaluation using the small computer SER 2d]. Z Gesamte Hyg 1972; 18:322-5. [PMID: 5050508] [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: 01/13/2023]
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49
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Zobel M, Prahl C. Wechselbeziehungen zwischen Ascorbinsäure und Cellulose bei papierchromatographischen Bestimmungen. ACTA ACUST UNITED AC 1967. [DOI: 10.1007/bf01787087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Schilling J, Zobel M. [A paper chromatographic method to determine solanine in potatoes and potato products]. Pharmazie 1966; 21:103-5. [PMID: 5982972] [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: 01/17/2023]
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