1
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Dütsch L, Sander K, Brendler E, Bremer M, Fischer S, Vogt C, Zuber J. Chemometric Combination of Ultrahigh Resolving Mass Spectrometry and Nuclear Magnetic Resonance Spectroscopy for a Structural Characterization of Lignin Compounds. ACS Omega 2024; 9:628-641. [PMID: 38222598 PMCID: PMC10785065 DOI: 10.1021/acsomega.3c06222] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/02/2023] [Accepted: 12/07/2023] [Indexed: 01/16/2024]
Abstract
In recent years, the potential of lignins as a resource for material-based applications has been highlighted in many scientific and nonscientific publications. But still, to date, a lack of detailed structural knowledge about this ultracomplex biopolymer undermines its great potential. The chemical complexity of lignin demands a combination of different, powerful analytical methods, in order to obtain these necessary information. In this paper, we demonstrate a multispectroscopic approach using liquid-state and solid-state Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and nuclear magnetic resonance (NMR) spectroscopy to characterize a fractionated LignoBoost lignin. Individual FT-ICR-MS, tandem MS, and NMR results helped to determine relevant information about the different lignin fractions, such as molecular weight distributions, oligomer sizes, linkage types, and presence of specific functional groups. In addition, a hetero spectroscopic correlation approach was applied to chemometrically combine MS, MS/MS, and NMR data sets. From these correlation analyses, it became obvious that a combination of tandem MS and NMR data sets gives the opportunity to comprehensively study and describe the general structure of complex biopolymer samples. Compound-specific structural information are obtainable, if this correlation approach is extended to 1D-MS and NMR data, as specific functional groups or linkages are verifiable for a defined molecular formula. This enables structural characterization of individual lignin compounds without the necessity for tandem MS experiments. Hence, these correlation results significantly improve the depth of information of each individual analysis and will hopefully help to structurally elucidate entire lignin structures in the near future.
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Affiliation(s)
- Lara Dütsch
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Strasse 29, Freiberg 09599, Germany
| | - Klara Sander
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Strasse 29, Freiberg 09599, Germany
| | - Erica Brendler
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Strasse 29, Freiberg 09599, Germany
| | - Martina Bremer
- Institute
of Plant and Wood Chemistry, TU Dresden, Pienner Strasse 19, Tharandt 01737, Germany
| | - Steffen Fischer
- Institute
of Plant and Wood Chemistry, TU Dresden, Pienner Strasse 19, Tharandt 01737, Germany
| | - Carla Vogt
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Strasse 29, Freiberg 09599, Germany
| | - Jan Zuber
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Strasse 29, Freiberg 09599, Germany
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2
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Prasser Q, Fuhs T, Torger B, Neubert R, Brendler E, Vogt C, Mertens F, Plamper FA. Nonequilibrium Colloids: Temperature-Induced Bouquet Formation of Flower-like Micelles as a Time-Domain-Shifting Macromolecular Heat Alert. ACS Appl Mater Interfaces 2023; 15:57950-57959. [PMID: 37676903 PMCID: PMC10739602 DOI: 10.1021/acsami.3c09590] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/23/2023] [Indexed: 09/09/2023]
Abstract
Climate change requires enhanced autonomous temperature monitoring during logistics/transport. A cheap approach comprises the use of temperature-sensitive copolymers that undergo temperature-induced irreversible coagulation. The synthesis/characterization of pentablock copolymers (PBCP) starting from poloxamer PEO130-b-PPO44-b-PEO130 (poly(ethylene oxide)130-b-poly(propylene oxide)44-b-poly(ethylene oxide)130) and adding two terminal qPDMAEMA85 (quaternized poly[(2-dimethylamino)ethyl methacrylate]85) blocks is presented. Mixing of PBCP solutions with hexacyanoferrate(III)/ferricyanide solutions leads to a reduction of the decane/water interfacial tension accompanied by a co/self-assembly toward flower-like micelles in cold water because of the formation of an insoluble/hydrophobic qPDMAEMA/ferricyanide complex. In cold water, the PEO/PPO blocks provide colloidal stability over months. In hot water, the temperature-responsive PPO block is dehydrated, leading to a pronounced temperature dependence of the oil-water interfacial tension. In solution, the sticky PPO segments exposed at the micellar corona cause a colloidal clustering above a certain threshold temperature, which follows Smoluchowski-type kinetics. This coagulation remains for months even after cooling, indicating the presence of a kinetically trapped nonequilibrium state for at least one of the observed micellar structures. Therefore, the system memorizes a previous suffering of heat. This phenomenon is linked to an exchange of qPDMAEMA-blocks bridging the micellar cores after PPO-induced clustering. The addition of ferrous ions hampers the exchange, leading to the reversible coagulation of Prussian blue loaded micelles. Hence, the Fe2+ addition causes a shift from history monitoring to the sensing of the present temperature. Presumably, the system can be adapted for different temperatures in order to monitor transport and storage in a simple way. Hence, these polymeric "flowers" could contribute to preventing waste and sustaining the quality of goods (e.g., food) by temperature-induced bouquet formation, where an irreversible exchange of "tentacles" between the flowers stabilizes the bouquet at other temperatures as well.
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Affiliation(s)
- Quirin Prasser
- Institute
of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
| | - Thomas Fuhs
- Institute
of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
| | - Bernhard Torger
- Institute
of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
| | - Richard Neubert
- Institute
of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
| | - Erica Brendler
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
| | - Carla Vogt
- Institute
of Analytical Chemistry, TU Bergakademie
Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
| | - Florian Mertens
- Institute
of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
- Center
for Efficient High Temperature Processes and Materials Conversion
ZeHS, TU Bergakademie Freiberg, Winklerstraße 5, Freiberg 09599, Germany
| | - Felix A. Plamper
- Institute
of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, Freiberg 09599, Germany
- Center
for Efficient High Temperature Processes and Materials Conversion
ZeHS, TU Bergakademie Freiberg, Winklerstraße 5, Freiberg 09599, Germany
- Freiberg
Center for Water Research ZeWaF, TU Bergakademie
Freiberg, Winklerstraße 5, Freiberg 09599, Germany
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3
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Krupinski K, Wagler J, Brendler E, Kroke E. A Non-Hydrolytic Sol–Gel Route to Organic-Inorganic Hybrid Polymers: Linearly Expanded Silica and Silsesquioxanes. Gels 2023; 9:gels9040291. [PMID: 37102903 PMCID: PMC10138140 DOI: 10.3390/gels9040291] [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] [Received: 03/10/2023] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
Condensation reactions of chlorosilanes (SiCl4 and CH3SiCl3) and bis(trimethylsilyl)ethers of rigid, quasi-linear diols (CH3)3SiO–AR–OSi(CH3)3 (AR = 4,4′-biphenylene (1) and 2,6-naphthylene (2)), with release of (CH3)3SiCl as a volatile byproduct, afforded novel hybrid materials that feature Si–O–C bridges. The precursors 1 and 2 were characterized using FTIR and multinuclear (1H, 13C, 29Si) NMR spectroscopy as well as single-crystal X-ray diffraction analysis in case of 2. Pyridine-catalyzed and non-catalyzed transformations were performed in THF at room temperature and at 60 °C. In most cases, soluble oligomers were obtained. The progress of these transsilylations was monitored in solution with 29Si NMR spectroscopy. Pyridine-catalyzed reactions with CH3SiCl3 proceeded until complete substitution of all chlorine atoms; however, no gelation or precipitation was found. In case of pyridine-catalyzed reactions of 1 and 2 with SiCl4, a Sol–Gel transition was observed. Ageing and syneresis yielded xerogels 1A and 2A, which exhibited large linear shrinkage of 57–59% and consequently low BET surface area of 10 m2⋅g−1. The xerogels were analyzed using powder-XRD, solid state 29Si NMR and FTIR spectroscopy, SEM/EDX, elemental analysis, and thermal gravimetric analysis. The SiCl4-derived amorphous xerogels consist of hydrolytically sensitive three-dimensional networks of SiO4-units linked by the arylene groups. The non-hydrolytic approach to hybrid materials may be applied to other silylated precursors, if the reactivity of the corresponding chlorine compound is sufficient.
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Affiliation(s)
- Katrin Krupinski
- Institute of Inorganic Chemistry, Department of Chemistry and Physics, Technische Universität Bergakademie Freiberg (TUBAF), Leipziger Strasse 29, 09596 Freiberg, Saxony, Germany
| | - Jörg Wagler
- Institute of Inorganic Chemistry, Department of Chemistry and Physics, Technische Universität Bergakademie Freiberg (TUBAF), Leipziger Strasse 29, 09596 Freiberg, Saxony, Germany
- Center of Efficient High Temperature Processes and Material Conversion (ZeHS), Technische Universität Bergakademie Freiberg (TUBAF), Winklerstr. 5, 09599 Freiberg, Saxony, Germany
| | - Erica Brendler
- Institute of Analytical Chemistry, Department of Chemistry and Physics, Technische Universität Bergakademie Freiberg (TUBAF), Leipziger Strasse 29, 09596 Freiberg, Saxony, Germany
| | - Edwin Kroke
- Institute of Inorganic Chemistry, Department of Chemistry and Physics, Technische Universität Bergakademie Freiberg (TUBAF), Leipziger Strasse 29, 09596 Freiberg, Saxony, Germany
- Center of Efficient High Temperature Processes and Material Conversion (ZeHS), Technische Universität Bergakademie Freiberg (TUBAF), Winklerstr. 5, 09599 Freiberg, Saxony, Germany
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4
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Schumann E, Brendler E, Böhme U, Mertens F. Synthesis of Aluminum N,N–dialkylcarbamates by Insertion of CO2 into Al–N Bonds. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200568] [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)
- Erik Schumann
- Technische Universität Bergakademie Freiberg Fakultät 2: Technische Universitat Bergakademie Freiberg Fakultat fur Chemie und Physik Institut für Physikalische Chemie Leipziger Str. 29 D-09596 Freiberg GERMANY
| | - Erica Brendler
- Technische Universität Bergakademie Freiberg Fakultät 2: Technische Universitat Bergakademie Freiberg Fakultat fur Chemie und Physik Institut für Analytische Chemie Leipziger Str. 29 D-09596 Freiberg GERMANY
| | - Uwe Böhme
- Technische Universität Bergakademie Freiberg Fakultät 2: Technische Universitat Bergakademie Freiberg Fakultat fur Chemie und Physik Institut für Anorganische Chemie Leipziger Str. 29 D-09596 Freiberg GERMANY
| | - Florian Mertens
- Technische Universität Bergakademie Freiberg: Technische Universitat Bergakademie Freiberg Institut für Physikalische Chemie Leipziger Str. 29 D-09596 Freiberg GERMANY
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5
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Kretzschmar J, Brendler E, Wagler J. Phenylarsonic acid-DMPS redox reaction and conjugation investigated by NMR spectroscopy and X-ray diffraction. Environ Toxicol Pharmacol 2022; 92:103837. [PMID: 35248761 DOI: 10.1016/j.etap.2022.103837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
The reaction between 2,3-dimercaptopropane-1-sulfonate (DMPS, unithiol) and four phenylarsonic(V) acids, i.e. phenylarsonic acid (PAA), 4-hydroxy-3-nitrophenylarsonic acid (HNPAA), 2-aminophenylarsonic acid (o-APAA) and 4-aminophenylarsonic acid (p-APAA), is investigated in aqueous solution. The pentavalent arsenic compounds are reduced by DMPS to their trivalent analogs and instantly chelated by the vicinal dithiol, forming covalent As-S bonds within a five-membered chelate ring. The different types and positions of polar substituents at the aromatic ring of the arsonic acids influence the reaction rates in the same way as observed for reaction with glutathione (GSH), as well as the syn/anti molar ratio of the diastereomeric products, which was analyzed using time- and temperature-dependent nuclear magnetic resonance (NMR) spectroscopy. Addition of DMPS to the conjugate formed by a phenylarsonic(V) acid and the biologically relevant tripeptide GSH showed the immediate replacement of GSH by chelating DMPS, underlining the importance of dithiols as detoxifying agent.
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Affiliation(s)
- Jerome Kretzschmar
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Jörg Wagler
- Institute of Inorganic Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
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6
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Ehrlich L, Gericke R, Brendler E, Wagler J. P-Ru-Complexes with a Chelate-Bridge-Switch: A Comparison of 2-Picolyl and 2-Pyridyloxy Moieties as Bridging Ligands. Molecules 2022; 27:molecules27092778. [PMID: 35566128 PMCID: PMC9103559 DOI: 10.3390/molecules27092778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 12/10/2022] Open
Abstract
Starting from [Ru(pyO)2(nbd)] 1 and a N,P,N-tridentate ligand (2a: PhP(pic)2, 2b: PhP(pyO)2) (nbd = 2,5-norbornadiene, pic = 2-picolyl = 2-pyridylmethyl, pyO = 2-pyridyloxy = pyridine-2-olate), the compounds [PhP(μ-pic)2(μ-pyO)Ru(κ2-pyO)] (3a) and [PhP(μ-pyO)3Ru(κ2-pyO)] (3b), respectively, were prepared. Reaction of compounds 3 with CO and CNtBu afforded the opening of the Ru(κ2-pyO) chelate motif with the formation of compounds [PhP(μ-pic)2(μ-pyO)Ru(κ-O-pyO)(CO)] (4a), [PhP(μ-pic)2(μ-pyO)2Ru(CNtBu)] (5a), [PhP(μ-pyO)4Ru(CO)] (4b) and [PhP(μ-pyO)4Ru(CNtBu)] (5b). In dichloromethane solution, 4a underwent a reaction with the solvent, i.e., substitution of the dangling pyO ligand by chloride with the formation of [PhP(μ-pic)2(μ-pyO)Ru(Cl)(CO)] (6a). The new complexes 3a, 4a, 5a, 5b and 6a were characterized by single-crystal X-ray diffraction analyses and multi-nuclear (1H, 13C, 31P) NMR spectroscopy. The different coordination behaviors of related pairs of molecules (i.e., pairs of 3, 4 and 5), which depend on the nature of the P-Ru-bridging ligand moieties (μ-pic vs. μ-pyO), were also studied via computational analyses using QTAIM (quantum theory of atoms in molecules) and NBO (natural bond orbital) approaches, as well as the NCI (non-covalent interactions descriptor) for weak intramolecular interactions.
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Affiliation(s)
- Lisa Ehrlich
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (L.E.); (R.G.)
| | - Robert Gericke
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (L.E.); (R.G.)
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf eV, D-01328 Dresden, Germany
| | - Erica Brendler
- Institut für Analytische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany;
| | - Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (L.E.); (R.G.)
- Correspondence: ; Tel.: +49-3731-39-4343
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7
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Schumann E, Böhme U, Brendler E, Mertens F. Synthesis and temperature-dependent NMR studies of monomeric and dimeric tris(dialkylamido)alanes. Dalton Trans 2022; 51:6427-6435. [PMID: 35388857 DOI: 10.1039/d2dt00508e] [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
After an introductory overview of all currently known tris(dialkylamido)alanes with the formula [Al(NR2)3]n (n = 1, 2), a simplified synthetic method based on the usage of is presented. The simplification results from the fact that the ether adduct can already be obtained during the necessary synthesis of the alane moiety and that the use of trimethylamine is no longer required. Current conflicts regarding the experimental data of tris(diethylamido)alane and their interpretation have been resolved by means of single crystal structure analysis. The N-methylpiperazine derivative was described for the first time and characterised by various analytical methods. In temperature-dependent NMR measurements ranging from -35 °C to 90 °C coalescence phenomena of 13C and 1H NMR signals of tris(N-methylpiperazino)alane as well as thermal migration of 1H NMR signals of tris(diethylamido)alane were observed.
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Affiliation(s)
- Erik Schumann
- TU Bergakademie Freiberg, Institut für Physikalische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany.
| | - Uwe Böhme
- TU Bergakademie Freiberg, Institut für Anorganische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany
| | - Erica Brendler
- TU Bergakademie Freiberg, Institut für Analytische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany
| | - Florian Mertens
- TU Bergakademie Freiberg, Institut für Physikalische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany.
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8
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Ryll C, Kraushaar K, Wagler J, Brendler E, Kroke E. Disilanes with Pentacoordinate Si Atoms by Carbon Dioxide Insertion into Aminodisilanes: Syntheses, Molecular Structures, and Dynamic Behavior. ACS Omega 2022; 7:9527-9536. [PMID: 35350308 PMCID: PMC8945131 DOI: 10.1021/acsomega.1c06868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
The insertion of carbon dioxide into the Si-N bonds of aminodisilanes ((RR'N) n Me3-n Si)2 affords carbamoyloxydisilanes ((RR'NC(O)O) n Me3-n Si)2. Some of the obtained insertion products feature pentacoordinate silicon atoms in the solid state and in solution, with two carbamoyloxy moieties bridging the Si-Si bond. The aminodisilanes and their insertion products were extensively analyzed, including single-crystal X-ray structure analyses. The temperature dependence of the higher coordination was investigated using variable temperature NMR experiments.
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9
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Affiliation(s)
- Thomas Elschner
- Institute of Plant and Wood Chemistry Technische Universität Dresden Pienner Str. 19 Tharandt 01737 Germany
| | - Erica Brendler
- Institute of Analytical Chemistry TU Bergakademie Freiberg Leipziger Str. 29 Freiberg 09599 Germany
| | - Steffen Fischer
- Institute of Plant and Wood Chemistry Technische Universität Dresden Pienner Str. 19 Tharandt 01737 Germany
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10
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Anders M, Schwarzer A, Brendler E, Pollex R, Schumann E, Sandig-Predzymirska L, Kaiser S, Mertens F. Bis-(triphenylphosphane) Aluminum Hydride: A Simple Way to Provide, Store, and Use Non-Polymerized Alane for Synthesis. Chempluschem 2021; 86:1193-1198. [PMID: 34437776 DOI: 10.1002/cplu.202100287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/07/2021] [Indexed: 11/11/2022]
Abstract
AlH3 (PPh3 )2 was synthesized as a stable solid being the first known 1 : 2 alane arylphosphane adduct. Although only weakly intra-molecularly coordinated, it displays as a molecular crystal significant inertness against atmospheric humidity and oxygen due to strong steric screening of the alane unit. The compound readily dissociates PPh3 in solution allowing for its use as a Lewis acidic reducing agent. These features lead to an easy to store, easy to use reducing agent that may enable the quantitative investigation of aluminum hydride chemistry including reduction, complexation and hydroalumination reactions. The structure contains two non-equivalent penta-coordinated aluminum centers that despite long Al-P distances of ca. 2.7 Å display unusually high quadrupolar coupling constants CQ of 25.1 and 26.5 in 27 Al solid state NMR measurements. The product was also tested as a reducing agent on a small set of selected compounds with various functional groups.
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Affiliation(s)
- Martin Anders
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Anke Schwarzer
- Department of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Erica Brendler
- Department of Analytical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Rolf Pollex
- Department of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Erik Schumann
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Lesia Sandig-Predzymirska
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Stefan Kaiser
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Florian Mertens
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
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11
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Bochmann S, Böhme U, Brendler E, Friebel M, Gerwig M, Gründler F, Günther B, Kroke E, Lehnert R, Ruppel L. Unexpected Formation of the Highly Symmetric Borate Ion [B(SiCl
3
)
4
]
−. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100246] [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: 11/06/2022]
Affiliation(s)
| | - Uwe Böhme
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Erica Brendler
- Institut für Analytische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Mike Friebel
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Maik Gerwig
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Franziska Gründler
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Betty Günther
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Edwin Kroke
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Robert Lehnert
- Wacker Chemie AG Friedrich-von-Heyden-Platz 1 01612 Nünchritz Germany
| | - Lars Ruppel
- Wacker Chemie AG Friedrich-von-Heyden-Platz 1 01612 Nünchritz Germany
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12
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Jach F, Wassner M, Bamberg M, Brendler E, Frisch G, Wunderwald U, Friedrich J. A Low‐Cost Al‐Graphite Battery with Urea and Acetamide‐Based Electrolytes. ChemElectroChem 2021. [DOI: 10.1002/celc.202100544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Franziska Jach
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
- Fakultät Chemie und Lebensmittelchemie Technische Universität Dresden 01062 Dresden Germany
| | - Maximilian Wassner
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
| | - Max Bamberg
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
- Institut für Anorganische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Erica Brendler
- Institut für Analytische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Gero Frisch
- Institut für Anorganische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Ulrike Wunderwald
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
| | - Jochen Friedrich
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
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13
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Jach F, Wassner M, Bamberg M, Brendler E, Frisch G, Wunderwald U, Friedrich J. A Low‐Cost Al‐Graphite Battery with Urea and Acetamide‐Based Electrolytes. ChemElectroChem 2021. [DOI: 10.1002/celc.202100183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Franziska Jach
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
- Fakultät Chemie und Lebensmittelchemie Technische Universität Dresden 01062 Dresden Germany
| | - Maximilian Wassner
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
| | - Max Bamberg
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
- Institut für Anorganische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Erica Brendler
- Institut für Analytische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Gero Frisch
- Institut für Anorganische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Ulrike Wunderwald
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
| | - Jochen Friedrich
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
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14
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Jach F, Wassner M, Bamberg M, Brendler E, Frisch G, Wunderwald U, Friedrich J. Front Cover: A Low‐Cost Al‐Graphite Battery with Urea and Acetamide‐Based Electrolytes (11/2021). ChemElectroChem 2021. [DOI: 10.1002/celc.202100545] [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: 11/12/2022]
Affiliation(s)
- Franziska Jach
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
- Fakultät Chemie und Lebensmittelchemie Technische Universität Dresden 01062 Dresden Germany
| | - Maximilian Wassner
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
| | - Max Bamberg
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
- Institut für Anorganische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Erica Brendler
- Institut für Analytische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Gero Frisch
- Institut für Anorganische Chemie Technische Universität Bergakademie Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Ulrike Wunderwald
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
| | - Jochen Friedrich
- Abteilung Materialien Fraunhofer IISB Schottkystrasse 10 91058 Erlangen Germany
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15
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Prasser Q, Steinbach D, Kodura D, Schildknecht V, König K, Weber C, Brendler E, Vogt C, Peuker U, Barner-Kowollik C, Mertens F, Schacher FH, Goldmann AS, Plamper FA. Electrochemical Stimulation of Water-Oil Interfaces by Nonionic-Cationic Block Copolymer Systems. Langmuir 2021; 37:1073-1081. [PMID: 33356289 DOI: 10.1021/acs.langmuir.0c02822] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Variable interfacial tension could be desirable for many applications. Beyond classical stimuli like temperature, we introduce an electrochemical approach employing polymers. Hence, aqueous solutions of the nonionic-cationic block copolymer poly(ethylene oxide)114-b-poly{[2-(methacryloyloxy)ethyl]diisopropylmethylammonium chloride}171 (i.e., PEO114-b-PDPAEMA171 with a quaternized poly(diisopropylaminoethyl methacrylate) block) were investigated by emerging drop measurements and dynamic light scattering, analyzing the PEO114-b-qPDPAEMA171 impact on the interfacial tension between water and n-decane and its micellar formation in the aqueous bulk phase. Potassium hexacyanoferrates (HCFs) were used as electroactive complexants for the charged block, which convert the bishydrophilic copolymer into amphiphilic species. Interestingly, ferricyanides ([Fe(CN)6]3-) act as stronger complexants than ferrocyanides ([Fe(CN)6]4-), leading to an insoluble qPDPAEMA block in the presence of ferricyanides. Hence, bulk micellization was demonstrated by light scattering. Due to their addressability, in situ redox experiments were performed to trace the interfacial tension under electrochemical control, directly utilizing a drop shape analyzer. Here, the open-circuit potential (OCP) was changed by electrolysis to vary the ratio between ferricyanides and ferrocyanides in the aqueous solution. While a chemical oxidation/reduction is feasible, also an electrochemical oxidation leads to a significant change in the interfacial tension properties. In contrast, a corresponding electrochemical reduction showed only a slight response after converting ferricyanides to ferrocyanides. Atomic force microscopy (AFM) images of the liquid/liquid interface transferred to a solid substrate showed particles that are in accordance with the diameter from light scattering experiments of the bulk phase. In conclusion, the present results could be an important step toward economic switching of interfaces suitable, e.g., for emulsion breakage.
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Affiliation(s)
- Quirin Prasser
- Institute of Physical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Daniel Steinbach
- Institute of Physical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Daniel Kodura
- Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Vincent Schildknecht
- Institute of Physical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Katja König
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, D-07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, D-07743 Jena, Germany
| | - Christian Weber
- Institute of Mechanical Process Engineering and Mineral Processing, TU Bergakademie Freiberg, Agricolastraße 1, 09599 Freiberg, Germany
- Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hannover, Germany
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Carla Vogt
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Urs Peuker
- Institute of Mechanical Process Engineering and Mineral Processing, TU Bergakademie Freiberg, Agricolastraße 1, 09599 Freiberg, Germany
| | - Christopher Barner-Kowollik
- Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Florian Mertens
- Institute of Physical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Felix H Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, D-07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, D-07743 Jena, Germany
| | - Anja S Goldmann
- Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Felix A Plamper
- Institute of Physical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
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16
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Sandig-Predzymirska L, Ortmeyer J, Wagler J, Brendler E, Habermann F, Anders M, Felderhoff M, Mertens F. The direct and reversible hydrogenation of activated aluminium supported by piperidine. Dalton Trans 2020; 49:17689-17698. [PMID: 33232434 DOI: 10.1039/d0dt03175e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The reversible hydrogenation of aminoalanes employing activated aluminium and piperidine has been explored. A selection of transition metal (TM) compounds have been investigated as additives for producing TM-activated aluminium (TM = Ti, Zr, Hf and Y). The effect of these additives on the activation of aluminium with respect to hydrogenation of an aluminium/piperidinoalane system has been studied. It has been shown that Ti, Zr and Hf can efficiently promote the activation of aluminium for its hydrogenation. The experiments performed showed that the TM activity for the piperidinoalane formation decreases in the order Zr > Hf > Ti > Y. Using multinuclear NMR spectroscopy, the reversibility of this piperidinoalane-based hydrogenation system has been evidenced, demonstrating a potential pathway for hydrogen storage in aminoalanes. The syntheses of piperidinoalanes as well as their structural and spectroscopic characterisation are described. Single-crystal X-ray diffraction analyses of [pip2AlH]2 and [pip3Al]2 (pip = 1-piperidinyl, C5H10N) revealed dimers containing a central [AlN]2 unit.
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Affiliation(s)
- Lesia Sandig-Predzymirska
- TU Bergakademie Freiberg, Fakultät für Chemie und Physik, Institut für Physikalische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany.
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17
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Kowalke J, Wagler J, Viehweger C, Brendler E, Kroke E. Ionic Dissociation of SiCl 4 : Formation of [SiL 6 ]Cl 4 with L=Dimethylphosphinic Acid. Chemistry 2020; 26:8003-8006. [PMID: 32511798 PMCID: PMC7383495 DOI: 10.1002/chem.202000435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 01/26/2020] [Revised: 03/01/2020] [Indexed: 11/12/2022]
Abstract
Reactions of SiCl4 with R2PO(OH) (R=Me, Cl) yield compounds with six‐fold coordinated silicon atoms. Whereas R=Me afforded the hexacoordinated tetra‐cationic silicon complex [Si(Me2PO(OH))6]4+ with chloride counter‐ions, R=Cl caused release of HCl with formation of a cyclic dimeric silicon complex [Si(Cl2PO(OH))(Cl2PO2)3(μ‐Cl2PO2)]2 with bridging bidentate dichlorophosphates.
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Affiliation(s)
- Janine Kowalke
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Inorganic Chemistry, Leipziger Straße 29, 09599, Freiberg, Germany
| | - Jörg Wagler
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Inorganic Chemistry, Leipziger Straße 29, 09599, Freiberg, Germany
| | - Christine Viehweger
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Analytical Chemistry, Leipziger Straße 29, 09599, Freiberg, Germany
| | - Erica Brendler
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Analytical Chemistry, Leipziger Straße 29, 09599, Freiberg, Germany
| | - Edwin Kroke
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Inorganic Chemistry, Leipziger Straße 29, 09599, Freiberg, Germany
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18
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Viehweger C, Kowalke J, Brendler E, Schwarzer S, Vogt C, Kroke E. Five- and six-fold coordinated silicon in silicodiphosphonates: short range order investigation by solid-state NMR spectroscopy. NEW J CHEM 2020. [DOI: 10.1039/c9nj05943a] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silicodiphosphonates synthesized by two different pathways show interesting chemical shifts of five- and sixfold coordinated silicon.
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Affiliation(s)
- Christine Viehweger
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Analytical Chemistry
- 09599 Freiberg
- Germany
| | - Janine Kowalke
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Erica Brendler
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Analytical Chemistry
- 09599 Freiberg
- Germany
| | - Sandra Schwarzer
- Technische Universität Bergakademie Freiberg
- Central Administration Services
- Operational Safety
- 09599 Freiberg
- Germany
| | - Claudia Vogt
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Edwin Kroke
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
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19
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Gericke R, Gondek C, Stapf A, Wagler J, Kroke E, Brendler E. Convenient two step synthesis of 29Si labelled tetraalkoxysilanes. Chem Commun (Camb) 2020; 56:13631-13633. [DOI: 10.1039/d0cc05525e] [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
Starting from silicon dioxide or silicon a scalable, reliable synthesis of 29Si enriched tetraethoxysilane, an essential sol–gel precursor, is presented.
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Affiliation(s)
- Robert Gericke
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Christoph Gondek
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - André Stapf
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Jörg Wagler
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Edwin Kroke
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Erica Brendler
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Analytical Chemistry
- 09599 Freiberg
- Germany
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20
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Machałowski T, Wysokowski M, Tsurkan MV, Galli R, Schimpf C, Rafaja D, Brendler E, Viehweger C, Żółtowska-Aksamitowska S, Petrenko I, Czaczyk K, Kraft M, Bertau M, Bechmann N, Guan K, Bornstein SR, Voronkina A, Fursov A, Bejger M, Biniek-Antosiak K, Rypniewski W, Figlerowicz M, Pokrovsky O, Jesionowski T, Ehrlich H. Spider Chitin: An Ultrafast Microwave-Assisted Method for Chitin Isolation from Caribena versicolor Spider Molt Cuticle. Molecules 2019; 24:E3736. [PMID: 31623238 PMCID: PMC6833065 DOI: 10.3390/molecules24203736] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/07/2019] [Accepted: 10/14/2019] [Indexed: 01/07/2023] Open
Abstract
Chitin, as a fundamental polysaccharide in invertebrate skeletons, continues to be actively investigated, especially with respect to new sources and the development of effective methods for its extraction. Recent attention has been focused on marine crustaceans and sponges; however, the potential of spiders (order Araneae) as an alternative source of tubular chitin has been overlooked. In this work, we focused our attention on chitin from up to 12 cm-large Theraphosidae spiders, popularly known as tarantulas or bird-eating spiders. These organisms "lose" large quantities of cuticles during their molting cycle. Here, we present for the first time a highly effective method for the isolation of chitin from Caribena versicolor spider molt cuticle, as well as its identification and characterization using modern analytical methods. We suggest that the tube-like molt cuticle of this spider can serve as a naturally prefabricated and renewable source of tubular chitin with high potential for application in technology and biomedicine.
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Affiliation(s)
- Tomasz Machałowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, 60965 Poznan, Poland.
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Marcin Wysokowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, 60965 Poznan, Poland.
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Mikhail V Tsurkan
- Leibniz Institute of Polymer Research Dresden, Dresden 01069, Germany.
| | - Roberta Galli
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, TU Dresden, 01307 Dresden, Germany.
| | - Christian Schimpf
- Institute of Materials Science, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - David Rafaja
- Institute of Materials Science, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Christine Viehweger
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Sonia Żółtowska-Aksamitowska
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, 60965 Poznan, Poland.
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Iaroslav Petrenko
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Katarzyna Czaczyk
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, 60637 Poznan, Poland.
| | - Michael Kraft
- Institute of Chemical Technology, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Martin Bertau
- Institute of Chemical Technology, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Nicole Bechmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany.
| | - Kaomei Guan
- Institute of Pharmacology and Toxicology, TU Dresden, 01307 Dresden, Germany.
| | - Stefan R Bornstein
- Center for Regenerative Therapies Dresden, TU Dresden, 01307 Dresden, Germany.
- Department of Medicine III, University Hospital Carl Gustav Carus Dresden, TU Dresden, 01307 Dresden, Germany.
| | - Alona Voronkina
- Department of Pharmacy, National Pirogov Memorial Medical University, 21018 Vinnytsia, Ukraine.
| | - Andriy Fursov
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Magdalena Bejger
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61704 Poznan, Poland.
| | | | - Wojciech Rypniewski
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61704 Poznan, Poland.
| | - Marek Figlerowicz
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61704 Poznan, Poland.
| | - Oleg Pokrovsky
- Geoscience and Environment Toulouse, UMR 5563 CNRS, 31400 Toulouse, France.
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina St. 36, 634050 Tomsk, Russia.
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, 60965 Poznan, Poland.
| | - Hermann Ehrlich
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
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21
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Petrenko I, Summers AP, Simon P, Żółtowska-Aksamitowska S, Motylenko M, Schimpf C, Rafaja D, Roth F, Kummer K, Brendler E, Pokrovsky OS, Galli R, Wysokowski M, Meissner H, Niederschlag E, Joseph Y, Molodtsov S, Ereskovsky A, Sivkov V, Nekipelov S, Petrova O, Volkova O, Bertau M, Kraft M, Rogalev A, Kopani M, Jesioniowski T, Ehrlich H. Extreme biomimetics: Preservation of molecular detail in centimeter-scale samples of biological meshes laid down by sponges. Sci Adv 2019; 5:eaax2805. [PMID: 31620556 PMCID: PMC6777968 DOI: 10.1126/sciadv.aax2805] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
Fabrication of biomimetic materials and scaffolds is usually a micro- or even nanoscale process; however, most testing and all manufacturing require larger-scale synthesis of nanoscale features. Here, we propose the utilization of naturally prefabricated three-dimensional (3D) spongin scaffolds that preserve molecular detail across centimeter-scale samples. The fine-scale structure of this collagenous resource is stable at temperatures of up to 1200°C and can produce up to 4 × 10-cm-large 3D microfibrous and nanoporous turbostratic graphite. Our findings highlight the fact that this turbostratic graphite is exceptional at preserving the nanostructural features typical for triple-helix collagen. The resulting carbon sponge resembles the shape and unique microarchitecture of the original spongin scaffold. Copper electroplating of the obtained composite leads to a hybrid material with excellent catalytic performance with respect to the reduction of p-nitrophenol in both freshwater and marine environments.
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Affiliation(s)
- Iaroslav Petrenko
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Freiberg, Germany
| | - Adam P. Summers
- Department of Biology, University of Washington, Seattle, WA, USA
| | - Paul Simon
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Sonia Żółtowska-Aksamitowska
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Freiberg, Germany
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Poznan, Poland
| | - Mykhailo Motylenko
- Institute of Materials Science, TU Bergakademie Freiberg, Freiberg, Germany
| | - Christian Schimpf
- Institute of Materials Science, TU Bergakademie Freiberg, Freiberg, Germany
| | - David Rafaja
- Institute of Materials Science, TU Bergakademie Freiberg, Freiberg, Germany
| | - Friedrich Roth
- Institute of Experimental Physics, TU Bergakademie Freiberg, Freiberg, Germany
| | - Kurt Kummer
- European Synchrotron Radiation Facility (ESRF), Grenoble, France
| | - Erica Brendler
- Institute of Analytic Chemistry, TU Bergakademie Freiberg, Freiberg, Germany
| | - Oleg S. Pokrovsky
- Geosciences Environment Toulouse, University of Toulouse, Toulouse, France
- BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russia
| | - Roberta Galli
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, TU Dresden, Dresden, Germany
| | - Marcin Wysokowski
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Freiberg, Germany
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Poznan, Poland
| | - Heike Meissner
- Faculty of Medicine and University Hospital Carl Gustav Carus of TU Dresden, Dresden, Germany
| | - Elke Niederschlag
- Institute for Nonferrous Metallurgy and Purest Materials, TU Bergakademie Freiberg, Freiberg, Germany
| | - Yvonne Joseph
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Freiberg, Germany
| | - Serguei Molodtsov
- Institute of Experimental Physics, TU Bergakademie Freiberg, Freiberg, Germany
- European XFEL GmbH, Schenefeld, Germany
- ITMO University, St. Petersburg, Russia
| | - Alexander Ereskovsky
- Institut Méditerranéen de Biodiversité et d’Ecologie (IMBE), CNRS, IRD, Aix Marseille Université, Avignon Université, Station Marine d’Endoume, Marseille, France
- Department of Embryology, Faculty of Biology, Saint-Petersburg State University, Saint Petersburg, Russia
| | - Viktor Sivkov
- Institute of Physics and Mathematics, Komi Science Center UrD RAS, Syktyvkar, Russia
| | - Sergey Nekipelov
- Institute of Physics and Mathematics, Komi Science Center UrD RAS, Syktyvkar, Russia
- Pitirim Sorokin Syktyvkar State University, Syktyvkar, Russia
| | - Olga Petrova
- Institute of Physics and Mathematics, Komi Science Center UrD RAS, Syktyvkar, Russia
- Pitirim Sorokin Syktyvkar State University, Syktyvkar, Russia
| | - Olena Volkova
- Institute of Iron and Steel Technology, TU Bergakademie Freiberg, Freiberg, Germany
| | - Martin Bertau
- Institute of Technical Chemistry, TU Bergakademie Freiberg, Freiberg, Germany
| | - Michael Kraft
- Institute of Technical Chemistry, TU Bergakademie Freiberg, Freiberg, Germany
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), Grenoble, France
| | - Martin Kopani
- Institute of Medical Physics, Biophysics, Informatics and Telemedicine, Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - Teofil Jesioniowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Poznan, Poland
| | - Hermann Ehrlich
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Freiberg, Germany
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22
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Vyalikh A, Koroteev VO, Münchgesang W, Köhler T, Röder C, Brendler E, Okotrub AV, Bulusheva LG, Meyer DC. Effect of Charge Transfer upon Li- and Na-Ion Insertion in Fine-Grained Graphitic Material as Probed by NMR. ACS Appl Mater Interfaces 2019; 11:9291-9300. [PMID: 30741532 DOI: 10.1021/acsami.8b20115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We investigated the insertion-extraction behaviors of Li and Na ions in graphitic materials using solid-state NMR. A unique advantage of high-degree 13C-isotope enrichment of graphitic material allowed sensitive and metastable graphite intercalation compounds to be measured in a short time. Ex situ 13C magic-angle spinning NMR spectra of 13C fine-grained graphite are presented as a function of state-of-charge. The observations are discussed with respect to graphite intercalation phenomena, which include the effects of charge transfer and the demagnetizing field. Dramatic narrowing of the 13C NMR signal in metal-intercalated graphite evidences quasi-complete charge transfer occurring between lithium and graphite host material and resulting in reducing the macroscopic field effects. Upon Na insertion, incomplete charge transfer is observed and explained by inaccessibility of graphitic interlayer space for Na ions in our study. In addition, critical issues of reversibility of Li- and Na-ion electrochemical cells and solid electrolyte interphase formation are considered on the atomic scale. The knowledge gained in the present work can be applied to advanced high-power-density electrode materials for safe and fast-charging metal-ion batteries or for novel spintronic concepts with controlled spin-polarized charge carrier injection and transport combined with the possibility to manipulate magnetic anisotropy.
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Affiliation(s)
- Anastasia Vyalikh
- Institut für Experimentelle Physik , Technische Universität Bergakademie Freiberg , Leipziger Str. 23 , 09599 Freiberg , Germany
| | - Victor O Koroteev
- Nikolaev Institute of Inorganic Chemistry , SB RAS , 3 Acad. Lavrentiev Avenue , 630090 Novosibirsk , Russia
| | - Wolfram Münchgesang
- Institut für Experimentelle Physik , Technische Universität Bergakademie Freiberg , Leipziger Str. 23 , 09599 Freiberg , Germany
| | - Thomas Köhler
- Institut für Experimentelle Physik , Technische Universität Bergakademie Freiberg , Leipziger Str. 23 , 09599 Freiberg , Germany
| | - Christian Röder
- Institut für Theoretische Physik , Technische Universität Bergakademie Freiberg , Leipziger Str. 23 , 09596 Freiberg , Germany
| | - Erica Brendler
- Institut für Analytische Chemie , Technische Universität Bergakademie Freiberg , Leipziger Str. 29 , 09599 Freiberg , Germany
| | - Alexander V Okotrub
- Nikolaev Institute of Inorganic Chemistry , SB RAS , 3 Acad. Lavrentiev Avenue , 630090 Novosibirsk , Russia
- Novosibirsk State University , 2 Pirogova Str. , 630090 Novosibirsk , Russia
| | - Lyubov G Bulusheva
- Nikolaev Institute of Inorganic Chemistry , SB RAS , 3 Acad. Lavrentiev Avenue , 630090 Novosibirsk , Russia
- Novosibirsk State University , 2 Pirogova Str. , 630090 Novosibirsk , Russia
| | - Dirk C Meyer
- Institut für Experimentelle Physik , Technische Universität Bergakademie Freiberg , Leipziger Str. 23 , 09599 Freiberg , Germany
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23
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Kowalke J, Arnold C, Ponomarev I, Jäger C, Kroll P, Brendler E, Kroke E. Structural Insight into Layered Silicon Hydrogen Phosphates Containing [SiO
6
] Octahedra Prepared by Different Reaction Routes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801321] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Janine Kowalke
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Inorganic Chemistry Leipziger Straße 29 09599 Freiberg Germany
| | - Christine Arnold
- Technische Universität Bergakademie Freiberg Department of Chemistry and Physics Institute of Analytical Chemistry Leipziger Straße 29 09599 Freiberg Germany
| | - Ilia Ponomarev
- The University of Texas at Arlington Department of Chemistry and Biochemistry 701 S. Nedderman Drive 76019 Arlington TX USA
| | - Christian Jäger
- BAM Federal Institute for Materials Research and Testing Division I.3 Richard Willstaetter Straße 11 12489 Berlin Germany
| | - Peter Kroll
- The University of Texas at Arlington Department of Chemistry and Biochemistry 701 S. Nedderman Drive 76019 Arlington TX USA
| | - Erica Brendler
- Technische Universität Bergakademie Freiberg Department of Chemistry and Physics Institute of Analytical Chemistry Leipziger Straße 29 09599 Freiberg Germany
| | - Edwin Kroke
- Technische Universität Bergakademie Freiberg, Department of Chemistry and Physics, Institute of Inorganic Chemistry Leipziger Straße 29 09599 Freiberg Germany
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24
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Krupinski K, Brendler E, Gericke R, Wagler J, Kroke E. A new aspect of the “pseudo water” concept of bis(trimethylsilyl)carbodiimide – “pseudohydrates” of aluminum. Zeitschrift für Naturforschung B 2018. [DOI: 10.1515/znb-2018-0137] [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: 11/15/2022]
Abstract
Abstract
Bis(trimethylsilyl)carbodiimide (BTSC), so-called “pseudo water” because of some analogies such as similar (group)electronegativities of Me3Si– vs. H– and –N=C=N– vs. –O–, may form two different kinds of “pseudo hydrates” of metals (M), i.e. M–N(SiMe3)=C=N(SiMe3) and M–N≡C–N(SiMe3)2, derived from its carbodiimide and cyanamide isomeric forms, respectively. With anhydrous AlCl3 in Me3SiCl solution BTSC was shown to be capable of forming both kinds of solvates, i.e. Cl3Al–N(SiMe3)–C≡N(SiMe3) (1) and ((Cl3Al)(Me3Si)NCN)3–Al–(N≡C–N(SiMe3)2)3 (2). Both compounds were isolated as crystalline solids, which undergo condensation reactions upon storage. By single-crystal X-ray diffraction analysis the constitution of 1 was confirmed unambiguously, and quantum chemical calculations (B3LYP/6-311++g(d,p)) confirmed that compound 1 is 6 kcal mol−1 more stable than its hypothetical N,N-bis(trimethylsilyl)cyanamide isomer Cl3Al–N≡C–N(SiMe3)2. Compound 1 represents the first crystallographically confirmed disilylcarbodiimide complex of a metal salt. The molecules of compound 2 are heavily disordered in the solid state (positional disorder of N≡C–N(SiMe3)2 vs. N≡C–N(SiMe3)(AlCl3) and positional disorder of SiMe3 vs. AlCl3 groups in the latter). Therefore, the identity of 2 was additionally confirmed by 13C, 15N, 27Al and 29Si CP/MAS NMR spectroscopy.
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Affiliation(s)
- Katrin Krupinski
- TU Bergakademie Freiberg, Department of Chemistry and Physics , Institute of Inorganic Chemistry , Leipziger Str. 29 , 09599 Freiberg , Germany
| | - Erica Brendler
- TU Bergakademie Freiberg, Department of Chemistry and Physics , Institute of Analytical Chemistry , Leipziger Str. 29 , 09599 Freiberg , Germany
| | - Robert Gericke
- TU Bergakademie Freiberg, Department of Chemistry and Physics , Institute of Inorganic Chemistry , Leipziger Str. 29 , 09599 Freiberg , Germany
| | - Jörg Wagler
- TU Bergakademie Freiberg, Department of Chemistry and Physics , Institute of Inorganic Chemistry , Leipziger Str. 29 , 09599 Freiberg , Germany
| | - Edwin Kroke
- TU Bergakademie Freiberg, Department of Chemistry and Physics , Institute of Inorganic Chemistry , Leipziger Str. 29 , 09599 Freiberg , Germany
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25
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Vizgalov VA, Nestler T, Trusov LA, Bobrikov IA, Ivankov OI, Avdeev MV, Motylenko M, Brendler E, Vyalikh A, Meyer DC, Itkis DM. Enhancing lithium-ion conductivity in NASICON glass-ceramics by adding yttria. CrystEngComm 2018. [DOI: 10.1039/c7ce01910f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The lithium conductivity of NASICON glass-ceramic electrolytes can be increased 5 times just by using additives, which change the glass crystallization patterns.
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Affiliation(s)
| | - Tina Nestler
- Technische Universität Bergakademie Freiberg
- D-09599 Freiberg
- Germany
| | - Lev A. Trusov
- Lomonosov Moscow State University
- 119991 Moscow
- Russian Federation
| | - Ivan A. Bobrikov
- Joint Institute for Nuclear Research
- 141980 Dubna
- Russian Federation
| | | | | | | | - Erica Brendler
- Technische Universität Bergakademie Freiberg
- D-09599 Freiberg
- Germany
| | | | - Dirk C. Meyer
- Technische Universität Bergakademie Freiberg
- D-09599 Freiberg
- Germany
| | - Daniil M. Itkis
- Lomonosov Moscow State University
- 119991 Moscow
- Russian Federation
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26
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Abstract
Fluorescent biogenic Schiff base compounds of dimethyltin featuring distinct coordination sphere in solid and solution phase.
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Affiliation(s)
- Navjot Singh
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Neha Srivastav
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | | | - Varinder Kaur
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Erica Brendler
- Institut für Analytische Chemie
- Technische Universität Bergakademie
- Freiberg – 09596
- Germany
| | - Jörg Wagler
- Institut für Anorganische Chemie
- Technische Universität Bergakademie
- Freiberg – 09596
- Germany
| | - Edwin Kroke
- Institut für Anorganische Chemie
- Technische Universität Bergakademie
- Freiberg – 09596
- Germany
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27
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Wächtler E, Wahlicht S, Privér SH, Bennett MA, Gerke B, Pöttgen R, Brendler E, Gericke R, Wagler J, Bhargava SK. Tin(IV) Compounds with 2-C 6F 4PPh 2 Substituents and Their Reactivity toward Palladium(0): Formation of Tin-Palladium Complexes via Oxidative Addition. Inorg Chem 2017; 56:5316-5327. [PMID: 28406288 DOI: 10.1021/acs.inorgchem.7b00410] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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 tin(IV) compounds MexSn(2-C6F4PPh2)4-x (1, x = 1; 2, x = 2) and ClSn(2-C6F4PPh2)3 (3) were obtained from the reactions of 2-LiC6F4PPh2 with MeSnCl3 (3:1), Me2SnCl2 (2:1), or SnCl4 (3:1), respectively. The reactions of 2-LiC6F4PPh2 with SnCl4 in different stoichiometric ratios (4:1-1:1) gave 3 as the main product. Compound Cl2Sn(2-C6F4PPh2)2 (4) was formed in the transmetalation reaction of 3 and [AuCl(tht)] but could not be isolated. 1 and 2 react with palladium(0) sources {[Pd(PPh3)4] and [Pd(allyl)Cp]} by the oxidative addition of one of their Sn-CAryl bonds to palladium(0) with formation of the heterobimetallic complexes [MeSn(μ-2-C6F4PPh2)2Pd(κC-2-C6F4PPh2)] (5) and [Me2Sn(μ-2-C6F4PPh2)Pd(κ2-2-C6F4PPh2)] (6) featuring Sn-Pd bonds. The reaction of 3 with palladium(0) proceeds via the oxidative addition of the Sn-Cl bond to palladium(0), thus furnishing the complex [Sn(μ-2-C6F4PPh2)3PdCl] (7) featuring a Sn-Pd bond and a pentacoordinate Pd atom. Transmetalation of MexSn(2-C6F4PPh2)4-x (x = 1-3) with [Pd(allyl)Cl]2 gave MexClSn(2-C6F4PPh2)3-x and [Pd(allyl)(μ-2-C6F4PPh2)]2. For x = 1, the compound MeClSn(2-C6F4PPh2)2 (generated in situ) reacted with another 1 equiv of [Pd(allyl)Cl]2 by the oxidative addition of the Sn-Cl bond to palladium(0) and the reductive elimination of allyl chloride, thus leading to [MeSn(μ-2-C6F4PPh2)2PdCl] (8). The reductive elimination of allyl chloride was also observed in the reaction of 3 with [Pd(allyl)Cl]2, giving [Sn(μ-2-C6F4PPh2)3PdCl] (7). All compounds have been characterized by means of multinuclear NMR spectroscopy, elemental analysis, single-crystal X-ray diffraction, and selected compounds by 119Sn Mössbauer spectroscopy. Computational analyses (natural localized molecular orbital calculations) have provided insight into the Sn-Pd bonding of 5-8.
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Affiliation(s)
- Erik Wächtler
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Sven Wahlicht
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Steven H Privér
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Martin A Bennett
- Research School of Chemistry, Australian National University , Canberra, Australian Capital Territory 2601, Australia
| | - Birgit Gerke
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstrasse 30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstrasse 30, 48149 Münster, Germany
| | | | | | | | - Suresh K Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
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28
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Heise K, Rossberg C, Strätz J, Bäurich C, Brendler E, Keller H, Fischer S. Impact of pre-treatments on properties of lignocelluloses and their accessibility for a subsequent carboxymethylation. Carbohydr Polym 2016; 161:82-89. [PMID: 28189249 DOI: 10.1016/j.carbpol.2016.12.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 12/09/2016] [Accepted: 12/27/2016] [Indexed: 11/27/2022]
Abstract
In this issue, different chemical (alkaline and sulfite pulping, ozonolysis) and mechanical (vibratory ball milling) pre-treatments were utilized for activating wheat straw and beech sawdust prior to carboxymethylation. Detailed analysis by a range of methods, including Klason-lignin, cellulose and hemicellulose quantification, Powder-X-ray diffraction (PXRD) and attenuated total reflection (ATR) IR spectroscopy, enabled the investigation of material alterations. Subsequently, carboxymethylation was carried out with both untreated and activated materials, allowing the evaluation of activation steps by determining degrees of substitution with carboxymethyl groups (DSCM). Moreover, carboxymethylation conditions were optimized, realizing high DSCM of up to 1.05. Results further revealed that ball milling enhanced the subsequent conversion; whereas chemical pre-treatments did not effectively increase material accessibilities. Further studies on chemically untreated materials emphasized that a highly reactive surface was already generated in the course of the carboxymethylation, inter alia through the concomitant dissolution of matrix components.
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Affiliation(s)
- Katja Heise
- Institute of Plant and Wood Chemistry, Technische Universität Dresden Pienner Straße 19, D-01737 Tharandt, Germany.
| | - Christine Rossberg
- Fraunhofer Center for Chemical-Biotechnological Processes CBP, Am Haupttor, D-06237 Leuna, Germany
| | - Juliane Strätz
- Institute of Plant and Wood Chemistry, Technische Universität Dresden Pienner Straße 19, D-01737 Tharandt, Germany
| | - Christian Bäurich
- Institute of Plant and Wood Chemistry, Technische Universität Dresden Pienner Straße 19, D-01737 Tharandt, Germany
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, Leipziger Str. 29, D-09599 Freiberg, Germany
| | - Harald Keller
- BASF SE, Carl-Bosch-Straße 38, D-67056 Ludwigshafen, Germany
| | - Steffen Fischer
- Institute of Plant and Wood Chemistry, Technische Universität Dresden Pienner Straße 19, D-01737 Tharandt, Germany
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29
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Böhme U, Gerwig M, Gründler F, Brendler E, Kroke E. Unexpected Formation and Crystal Structure of the Highly Symmetric Carbanion [C(SiCl3)3]-. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600763] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Uwe Böhme
- Institut für Anorganische Chemie; TU Bergakademie Freiberg; Leipziger Straße 29 09599 Freiberg Germany
| | - Maik Gerwig
- Institut für Anorganische Chemie; TU Bergakademie Freiberg; Leipziger Straße 29 09599 Freiberg Germany
| | - Franziska Gründler
- Institut für Anorganische Chemie; TU Bergakademie Freiberg; Leipziger Straße 29 09599 Freiberg Germany
| | - Erica Brendler
- Institut für Analytische Chemie; TU Bergakademie Freiberg; Leipziger Straße 29 09599 Freiberg Germany
| | - Edwin Kroke
- Institut für Anorganische Chemie; TU Bergakademie Freiberg; Leipziger Straße 29 09599 Freiberg Germany
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30
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Affiliation(s)
- Maik Gerwig
- Department of Inorganic Chemistry TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Marcus Schwarz
- Department of Inorganic Chemistry TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Erica Brendler
- Department of Analytical Chemistry TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Edwin Kroke
- Department of Inorganic Chemistry TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
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31
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Affiliation(s)
- Florian Bitto
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Erica Brendler
- Institut für Analytische Chemie TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Uwe Böhme
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Jörg Wagler
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
| | - Edwin Kroke
- Institut für Anorganische Chemie TU Bergakademie Freiberg Leipziger Str. 29 09599 Freiberg Germany
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32
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Warncke G, Fels S, Brendler E, Böhme U. Tautomerism in N-(2-hydroxy-1-naphthylidene)amino acids and the search for an answer to the difficult question about where the proton belongs. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.03.040] [Citation(s) in RCA: 5] [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: 11/16/2022]
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33
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Kretzschmar J, Jordan N, Brendler E, Tsushima S, Franzen C, Foerstendorf H, Stockmann M, Heim K, Brendler V. Spectroscopic evidence for selenium(IV) dimerization in aqueous solution. Dalton Trans 2016; 44:10508-15. [PMID: 25986391 DOI: 10.1039/c5dt00730e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aqueous speciation of selenium(iv) was elucidated by a combined approach applying quantum chemical calculations, infrared (IR), Raman, and (77)Se NMR spectroscopy. The dimerization of hydrogen selenite (HSeO3(-)) was confirmed at concentrations above 10 mmol L(-1) by both IR and NMR spectroscopy. Quantum chemical calculations provided the assignment of vibrational bands observed to specific molecular modes of the (HSeO3)2(2-) ion. The results presented will provide a better understanding of the chemistry of aqueous Se(iv) which is of particular interest for processes occurring at mineral/water interfaces.
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Affiliation(s)
- J Kretzschmar
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
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34
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Wächtler E, Gericke R, Brendler E, Gerke B, Langer T, Pöttgen R, Zhechkov L, Heine T, Wagler J. Group 10–group 14 metal complexes [E–TM]IV: the role of the group 14 site as an L, X and Z-type ligand. Dalton Trans 2016; 45:14252-64. [DOI: 10.1039/c6dt01621a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The group 14 element's ligand role in N,S-bridged transition metal complexes was shown to depend on both atoms’ substitution patterns.
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Affiliation(s)
- Erik Wächtler
- TU Bergakademie Freiberg
- Institut für Anorganische Chemie
- 09596 Freiberg
- Germany
| | - Robert Gericke
- TU Bergakademie Freiberg
- Institut für Anorganische Chemie
- 09596 Freiberg
- Germany
| | - Erica Brendler
- TU Bergakademie Freiberg
- Institut für Analytische Chemie
- 09596 Freiberg
- Germany
| | - Birgit Gerke
- Westfälische Wilhelms-Universität Münster
- Institut für Anorganische und Analytische Chemie
- 48149 Münster
- Germany
| | - Thorsten Langer
- Westfälische Wilhelms-Universität Münster
- Institut für Anorganische und Analytische Chemie
- 48149 Münster
- Germany
| | - Rainer Pöttgen
- Westfälische Wilhelms-Universität Münster
- Institut für Anorganische und Analytische Chemie
- 48149 Münster
- Germany
| | - Lyuben Zhechkov
- Universität Leipzig
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
- 04103 Leipzig
- Germany
| | - Thomas Heine
- Universität Leipzig
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
- 04103 Leipzig
- Germany
| | - Jörg Wagler
- TU Bergakademie Freiberg
- Institut für Anorganische Chemie
- 09596 Freiberg
- Germany
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35
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Paul LE, Foehn IC, Schwarzer A, Brendler E, Böhme U. Addendum to “Salicylaldehyde-(2-hydroxyethyl)imine – A flexible ligand for group 13 and 14 elements” [Inorg. Chim. Acta 423 (2014) 268–280]. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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36
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Abstract
An unprecedented class of macrocycles with intrinsic fluorescence consisting of phenolic trimers and quinizarin is developed. Though they are lacking strong hydrogen bonds as observed in calixarenes, the two examples introduced here each adopt a vase-like conformation with all four aromatic units pointing in one direction (syn orientation). This "cone" conformation has been confirmed by NMR spectroscopy, molecular modeling, and X-ray crystallography. The laminar, electron-rich fluorophore as part of the macrocycle allows additional contacts to enclosed guest molecules.
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Affiliation(s)
- M Bürger
- †Institute of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, Freiberg/Sachsen, Germany
| | - F Katzsch
- †Institute of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, Freiberg/Sachsen, Germany
| | - E Brendler
- ‡Institute of Analytical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, Freiberg/Sachsen, Germany
| | - T Gruber
- †Institute of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, Freiberg/Sachsen, Germany
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37
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Wächtler E, Kämpfe A, Krupinski K, Gerlach D, Kroke E, Brendler E, Wagler J. New Insights into Hexacoordinated Silicon Complexes with 8- Oxyquinolinato Ligands: 1,3-Shift of Si-Bound Hydrocarbyl Substituents and the Influence of Si-Bound Halides on the 8-Oxyquinolinate Coordination Features. Zeitschrift für Naturforschung B 2015. [DOI: 10.5560/znb.2014-4170] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The transsilylation reaction between allyltrichlorosilane and 8-trimethylsiloxyquinoline in the molar ratio 1 : 3 yields the hexacoordinated silicon tris-chelate (oxinate)2Si(adho) (“oxinate” = 8- oxyquinolinate, “adho” = di-anion of 2-allyl-1,2-dihydro-8-oxyquinoline) comprising an SiO3N3 skeleton. The identity of this complex was established by single-crystal X-ray diffraction analysis and 29Si CP=MAS NMR spectroscopy of its chloroform solvate. Benzyltrichlorosilane and dibenzyldichlorosilane, comprising benzyl (Bn) as an “aromatically stabilized allyl moiety” did not undergo such rearrangement. Instead, the complexes (oxinate)2SiBnCl and (oxinate)2SiBn2 were obtained even upon using three molar equivalents of 8-trimethylsiloxyquinoline.
We determined the crystal structure of a non-disordered bis-chelate (oxinate)2SiBnCl with Sibound hydrocarbyl and halogen substituents (the previously published (oxinate)2SiMeCl was disordered with alternative Me=Cl site occupancies). (Oxinate)2SiBnCl exhibits surprisingly poor response of the N-Si bonds to the different trans-disposed Si-X (X=Bn, Cl) bonds. For comparison and deeper insights into the coordination chemistry of oxinato silicon complexes with halide substituents, we determined the crystal structures of (oxinate)2SiPhCl·CHCl3, (oxinate)2SiCl2, (oxinate)2SiF2·1.5(CHCl3), and (8-oxyquinaldinate)2SiF2. Furthermore, the crystal structures of BnSiCl3 and Bn2SiCl2 (and its dibromo analog) are reported. The influence of the Si-C-C-C torsion angles of the benzyl group on the 29Si NMR shift of benzylsilanes (which is noticeably upfield with respect to analogous methyl silanes) was analyzed by quantum-chemical calculations.
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Affiliation(s)
- Erik Wächtler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
| | - Alexander Kämpfe
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
| | - Katrin Krupinski
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
| | - Daniela Gerlach
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
| | - Edwin Kroke
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
| | - Erica Brendler
- Institut für Analytische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
| | - Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg/Sachsen, Germany
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Kämpfe A, Brendler E, Kroke E, Wagler J. Tp*Cu(I)-CN-SiL2-NC-Cu(I)Tp*--a hexacoordinate Si-complex as connector for redox active metals via π-conjugated ligands. Dalton Trans 2015; 44:4744-50. [PMID: 25665985 DOI: 10.1039/c4dt03903c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hexacoordinate silicon complexes L2SiX2 (L = a 2-benzoylpyrrol-1-yl derivative, X = CN, NCS) were synthesized from L2SiCl2 by ligand exchange with trimethylsilyl reagents Me3SiX. In the presence of [Tp*CuNCMe] and Me3SiCN the silicon complex L2Si(NC(CuTp*))2 was obtained, which contains a linear Cu-CN-Si-NC-Cu unit (Tp* = hydrotris(3,5-dimethylpyrazolyl)borato).
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Affiliation(s)
- Alexander Kämpfe
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany.
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Paul LE, Foehn IC, Schwarzer A, Brendler E, Böhme U. Salicylaldehyde-(2-hydroxyethyl)imine – A flexible ligand for group 13 and 14 elements. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.08.026] [Citation(s) in RCA: 10] [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: 10/24/2022]
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Kretzschmar J, Brendler E, Wagler J, Schmidt AC. Kinetics and activation parameters of the reaction of organoarsenic(V) compounds with glutathione. J Hazard Mater 2014; 280:734-740. [PMID: 25238190 DOI: 10.1016/j.jhazmat.2014.08.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 04/16/2014] [Revised: 07/12/2014] [Accepted: 08/12/2014] [Indexed: 06/03/2023]
Abstract
In this work the kinetics of the reaction of glutathione (GSH) with the organoarsenic(V) compounds phenylarsonic acid (PAA), 4-hydroxy-3-nitrophenylarsonic acid (HNPAA), p-aminophenylarsonic acid (p-APAA) and o-aminophenylarsonic acid (o-APAA) as well as monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA) is investigated. The reaction progress is monitored in real time by (1)H NMR, allowing the determination of rate coefficients and half-lives as well as activation parameters. The reaction consists of two steps: redox reaction and conjugation. In all investigated systems the conjugation is fast compared to the redox reaction and, therefore, rate determining. All investigated phenylarsonic acids follow the same rate law, showing overall reaction orders of 3 and half-lives between 47.7 ± 0.2 and 71.0 ± 3.6 min. The methylated compounds react slower, showing half-lives of 76.6 ± 0.4 and 444 ± 10 min for DMAA and MMAA, respectively. Enthalpies of activation range from 20 to 36 (± 2) kJ mol(-1) and the entropies of activation are within -154 and -97(± 7)J mol(-1)K(-1). The results reveal a correlation of the toxicity of the arsenic compound and the reaction rate with GSH. This may pave the way for the estimation of the toxicity of such compounds by simple kinetic studies.
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Affiliation(s)
- Jerome Kretzschmar
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
| | - Jörg Wagler
- Institute of Inorganic Chemistry, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
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41
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Kämpfe A, Brendler E, Kroke E, Wagler J. 2-Acylpyrroles as mono-anionic O,N-chelating ligands in silicon coordination chemistry. Chemistry 2014; 20:9409-18. [PMID: 25043769 DOI: 10.1002/chem.201402803] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 03/27/2014] [Indexed: 11/07/2022]
Abstract
Kryptopyrrole (2,4-dimethyl-3-ethylpyrrole) was acylated with, for example, benzoyl chloride to afford 2-benzoyl-3,5-dimethyl-4-ethylpyrrole (L(1)H). With SiCl4 this ligand reacts under liberation of HCl and formation of the complex L(1)2SiCl2. In related reactions with HSiCl3 or H2SiCl2, the same chlorosilicon complex is formed under liberation of HCl and H2 or liberation of H2, respectively. The chlorine atoms of L(1)2SiCl2 can be replaced by fluoride and triflate using ZnF2 and Me3Si-OTf, respectively. The use of a supporting base (triethylamine) is required for the complexation of phenyltrichlorosilane and diphenyldichlorosilane. The complexes L(1)2SiCl2, L(1)2SiF2, L(1)2Si(OTf)2, L(1)2SiPhCl, and L(1)2SiPh2 exhibit various configurations of the octahedral silicon coordination spheres (i.e. cis or trans configuration of the monodentate substituents, different orientations of the bidentate chelating ligands relative to each other). Furthermore, cationic silicon complexes L(1)3Si(+) and L(1) SiPh(+) were synthesized by chloride abstraction with GaCl3. In contrast, reaction of L(1)2SiCl2 with a third equivalent of L(1)H in the presence of excess triethylamine produced a charge-neutral hexacoordinate Si complex with a new tetradentate chelating ligand which formed by Si-templated C-C coupling of two ligands L(1).
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Affiliation(s)
- Alexander Kämpfe
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, 09596 Freiberg (Germany), Fax: (+49) 3731394058
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Wagler J, Schley M, Gerlach D, Böhme U, Brendler E, Roewer G. Surprising Insights in the Various Molecular Structures of Hypercoordinate Bis(oxinato)silicon Complexes. Zeitschrift für Naturforschung B 2014. [DOI: 10.1515/znb-2005-1006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The syntheses of two cyclic diorganosilicon enamines
=CH2) [R = Ph (2a), Me (2b)] are described. These compounds react with 8-oxyquinoline leading to bis(oxinato)silicon complexes RPhSi(oxinate)2 [R = Ph (5a), Me (5b)]. Their X-ray structures reveal hexacoordination of the Si atom with the monodentate substituents in cis-positions and N atoms as well as O atoms in trans-positions.
In crystalline dimethylbis(oxinato)silicon, Me2Si(oxinate)2 (7), the silicon atom is only bicapped tetrahedrally coordinated, while for dichlorobis(oxinato)silicon, Cl2Si(oxinate)2 (8), there is an octahedral coordination of the Si atom with chlorine atoms in trans-positions. This conclusion is based on the results of spectroscopic analysis (IR, 29Si CP/MAS NMR) as well as quantum chemical calculations. The first example of a silicon-bis-oxinate with the N→Si dative bonds in a trans-arrangement has been detected in the hexacoordinate silicon tris-chelate (oxinate)2Si(PhN-CH2CH2-NPh) (11). Its configuration was proven by X-ray structure analysis. Thus, for hexacoordinate bis(oxinato)silicon compounds three new architectures were found which complement the previously established building pattern of the N,N’-cis-O,O’-trans-bis(oxinato)silicon complexes.
The mer-tris(oxinato)siliconium cation (9+) (its configuration being proven by 1H and 13C NMR spectroscopy) features at least three coordination patterns with (O,O;N,N)-cis,cis-, -cis,trans- as well as -trans,cis-arrangements of two oxinate ligands.
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Affiliation(s)
- Jörg Wagler
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg
| | - Michael Schley
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg
| | - Daniela Gerlach
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg
| | - Uwe Böhme
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg
| | - Erica Brendler
- Institut für Analytische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Straße 29, D-09596 Freiberg, Germany
| | - Gerhard Roewer
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg
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Wahlicht S, Brendler E, Heine T, Zhechkov L, Wagler J. 7-Azaindol-1-yl(organo)silanes and Their PdCl2 Complexes: Pd-Capped Tetrahedral Silicon Coordination Spheres and Paddlewheels with a Pd–Si Axis. Organometallics 2014. [DOI: 10.1021/om401220m] [Citation(s) in RCA: 15] [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: 11/28/2022]
Affiliation(s)
- Sven Wahlicht
- Institut
für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany
| | - Erica Brendler
- Institut
für Analytische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany
| | - Thomas Heine
- School
of Engineering and Science, Theoretical Physics - Theoretical Materials
Science, Jacobs University Bremen gGmbH, D-28759 Bremen, Germany
| | - Lyuben Zhechkov
- School
of Engineering and Science, Theoretical Physics - Theoretical Materials
Science, Jacobs University Bremen gGmbH, D-28759 Bremen, Germany
| | - Jörg Wagler
- Institut
für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany
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44
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Jähnigen S, Brendler E, Böhme U, Heide G, Kroke E. Silicophosphates containing SiO6octahedra – anhydrous synthesis under ambient conditions. NEW J CHEM 2014. [DOI: 10.1039/c3nj00721a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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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45
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Wagler J, Brendler E, Heine T, Zhechkov L. Disilicon complexes with two hexacoordinate Si atoms: paddlewheel-shaped isomers with (ClN4 )Si-Si(S4 Cl) and (ClN2 S2 )Si-Si(S2 N2 Cl) skeletons. Chemistry 2013; 19:14296-303. [PMID: 24009095 DOI: 10.1002/chem.201300452] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 02/04/2013] [Revised: 06/07/2013] [Indexed: 11/11/2022]
Abstract
The reaction of 1-methyl-3-trimethylsilylimidazoline-2-thione with hexachlorodisilane proceeds toward substitution of four of the disilane Cl atoms during the formation of disilicon complexes with two neighboring hexacoordinate Si atoms. The N,S-bidentate methimazolide moieties adopt a buttressing role, thus forming paddlewheel-shaped complexes of the type ClSi(μ-mt)4 SiCl (mt=methimazolyl). Most interestingly, three isomers (i.e., with (ClN4 )SiSi(S4 Cl), (ClN3 S)SiSi(S3 NCl), and (ClN2 S2 )SiSi(S2 N2 Cl) skeletons as so-called (4,0), (3,1), and cis-(2,2) paddlewheels) were detected in solution by using (29) Si NMR spectroscopic analysis. Two of these isomers could be isolated as crystalline solids, thus allowing their molecular structures to be analyzed by using X-ray diffraction studies. In accord with time-dependent NMR spectroscopy, computational analyses proved the cis-(2,2) isomer with a (ClN2 S2 )SiSi(S2 N2 Cl) skeleton to be the most stable. The compounds presented herein are the first examples of crystallographically evidenced disilicon complexes with two SiSi-bonded octahedrally coordinated Si atoms and representatives of the still scarcely explored class of Si coordination compounds with sulfur donor atoms.
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Affiliation(s)
- Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, 09596 Freiberg (Germany), Fax: (+49) 3731-39-4058.
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Schäfer A, Reißmann M, Jung S, Schäfer A, Saak W, Brendler E, Müller T. Synthesis of Silylium and Germylium Ions by a Substituent Exchange Reaction. Organometallics 2013. [DOI: 10.1021/om400366z] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [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)
- André Schäfer
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl
von Ossietzky-Straße 9-11, D-26129 Oldenburg, Federal Republic
of Germany
| | - Matti Reißmann
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl
von Ossietzky-Straße 9-11, D-26129 Oldenburg, Federal Republic
of Germany
| | - Sebastian Jung
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl
von Ossietzky-Straße 9-11, D-26129 Oldenburg, Federal Republic
of Germany
| | - Annemarie Schäfer
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl
von Ossietzky-Straße 9-11, D-26129 Oldenburg, Federal Republic
of Germany
| | - Wolfgang Saak
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl
von Ossietzky-Straße 9-11, D-26129 Oldenburg, Federal Republic
of Germany
| | - Erica Brendler
- Institut für
Analytische
Chemie, Technische Universität Freiberg, Leipziger Straße 29, D-09599 Freiberg, Federal Republic of
Germany
| | - Thomas Müller
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl
von Ossietzky-Straße 9-11, D-26129 Oldenburg, Federal Republic
of Germany
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Bitto F, Kraushaar K, Böhme U, Brendler E, Wagler J, Kroke E. Chlorosilanes and 3,5-Dimethylpyrazole: Multinuclear Complexes, Acetonitrile Insertion and29Si NMR Chemical-Shift Anisotropy Studies. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300109] [Citation(s) in RCA: 20] [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: 11/07/2022]
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48
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Pfeifer S, Schwarzer A, Schmidt D, Brendler E, Veith M, Kroke E. Precursors for pyromellit-bridged silica sol–gel hybrid materials. NEW J CHEM 2013. [DOI: 10.1039/c2nj40538e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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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49
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Autschbach J, Sutter K, Truflandier LA, Brendler E, Wagler J. Corrigendum: Atomic Contributions from Spin-Orbit Coupling to29Si NMR Chemical Shifts in Metallasilatrane Complexes. Chemistry 2012. [DOI: 10.1002/chem.201203953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Weber J, Grossmann G, Demadis KD, Daskalakis N, Brendler E, Mangstl M, Schmedt auf der Günne J. Linking 31P Magnetic Shielding Tensors to Crystal Structures: Experimental and Theoretical Studies on Metal(II) Aminotris(methylenephosphonates). Inorg Chem 2012; 51:11466-77. [DOI: 10.1021/ic301192y] [Citation(s) in RCA: 18] [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: 11/29/2022]
Affiliation(s)
- Johannes Weber
- Department of Chemistry, Ludwig-Maximilians-Universität, D-81377 Munich, Germany
| | - Gisbert Grossmann
- Department of Chemistry, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Konstantinos D. Demadis
- Crystal Engineering, Growth and
Design Laboratory, Department of Chemistry, University of Crete, P.O. Box 2208,
Voutes Campus, Heraklion GR-71003, Crete, Greece
| | - Nikos Daskalakis
- Crystal Engineering, Growth and
Design Laboratory, Department of Chemistry, University of Crete, P.O. Box 2208,
Voutes Campus, Heraklion GR-71003, Crete, Greece
| | - Erica Brendler
- Fakultät für Chemie
und Physik, TU Bergakademie Freiberg, Leipziger
Strasse 29, D-09599 Freiberg, Germany
| | - Martin Mangstl
- Department of Chemistry, Ludwig-Maximilians-Universität, D-81377 Munich, Germany
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