1
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Lima S, Pohle MH, Böhme M, Görls H, Lohmiller T, Schnegg A, Dinda R, Plass W. Kink distortion of the pseudo- S4 axis in pseudotetrahedral [N 2O 2] bis-chelate cobalt(II) single-ion magnets leads to increased magnetic anisotropy. Dalton Trans 2023. [PMID: 37395577 DOI: 10.1039/d3dt01604h] [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: 07/04/2023]
Abstract
Two new mononuclear cobalt(II) complexes with the general formula [Co(L1,2)2] (1 and 2) were synthesized using bidentate Schiff base ligands with NO donor set, namely, 2-(benzothiazole-2-ylimino)methyl-5-(diethylamino)phenol (HL1) and its methyl substituted derivative 2-(6-methylbenzothiazole-2-ylimino)methyl-5-(diethylamino)phenol (HL2). X-ray structure analysis reveals a distorted pseudotetrahedral coordination sphere at the cobalt(II) ion, that cannot be described by a simple twisting of the two ligand chelate planes with respect to each other, which would imply a rotation about the pseudo-S4 axis of the complex. Such a pseudo-rotation axis would approximately be colinear with the two vectors defined by the cobalt ion and the two centroids of the chelate ligands, where the angle κ between the two vectors would be 180° in an ideal pseudotetrahedral arrangement. For complexes 1 and 2, the observed distortion can be characterized by a significant bending at the cobalt ion with angles κ of 163.2° and 167.4°, respectively. Magnetic susceptibility and FD-FT THz-EPR measurements together with ab initio calculations reveal an easy-axis type of anisotropy for both complexes 1 and 2, with a spin-reversal barrier of 58.9 and 60.5 cm-1, respectively. For both compounds, frequency-dependent ac susceptibility measurements show an out-of-phase susceptibility under applied static fields of 40 and 100 mT, which can be analyzed in terms of Orbach and Raman processes within the observed temperature range.
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Affiliation(s)
- Sudhir Lima
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany.
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India.
| | - Maximilian H Pohle
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany.
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany.
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany.
| | - Thomas Lohmiller
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany
- EPR4 Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany
| | - Alexander Schnegg
- EPR4 Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany
- EPR Research Group, Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Rupam Dinda
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India.
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany.
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2
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Rams M, Lohmiller T, Böhme M, Jochim A, Foltyn M, Schnegg A, Plass W, Näther C. Weakening the Interchain Interactions in One Dimensional Cobalt(II) Coordination Polymers by Preventing Intermolecular Hydrogen Bonding. Inorg Chem 2023. [PMID: 37319419 DOI: 10.1021/acs.inorgchem.3c01324] [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: 06/17/2023]
Abstract
The reaction of Co(NCS)2 with N-methylaniline leads to the formation of [Co(NCS)2(N-methylaniline)2]n (1), in which the cobalt(II) cations are octahedrally coordinated and linked into linear chains by pairs of thiocyanate anions. In contrast to [Co(NCS)2(aniline)2]n (2) reported recently, in which the Co(NCS)2 chains are linked by strong interchain N-H···S hydrogen bonding, such interactions are absent in 1. Computational studies reveal that the cobalt(II) ions in compound 1 show an easy-axis anisotropy that is lower than in 2, but with the direction of the easy axis being similar in both compounds. The high magnetic anisotropy is also confirmed by magnetic and FD-FT THz-EPR spectroscopy, which yield a consistent gz value. These investigations prove that the intrachain interactions in 1 are slightly higher than in 2. Magnetic measurements reveal that the critical temperature for magnetic ordering in 1 is significantly lower than in 2, which indicates that the elimination of the hydrogen bonds leads to a weakening of the interchain interactions. This is finally proven by FD-FT THz-EPR experiments, which show that the interchain interaction energy in the N-methylaniline compound 1 is nine-fold smaller than in the aniline compound 2.
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Affiliation(s)
- Michał Rams
- M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489 Berlin, Germany
| | - Michael Böhme
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Aleksej Jochim
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Magdalena Foltyn
- M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489 Berlin, Germany
- EPR Research Group, Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim Ruhr, Germany
| | - Winfried Plass
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
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3
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Pohle MH, Böhme M, Lohmiller T, Ziegenbalg S, Blechschmidt L, Görls H, Schnegg A, Plass W. Magnetic Anisotropy and Relaxation of Pseudotetrahedral [N 2 O 2 ] Bis-Chelate Cobalt(II) Single-Ion Magnets Controlled by Dihedral Twist Through Solvomorphism. Chemistry 2023; 29:e202202966. [PMID: 36468847 DOI: 10.1002/chem.202202966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/04/2022] [Accepted: 12/05/2022] [Indexed: 12/07/2022]
Abstract
The methanol solvomorph 1 ⋅ 2MeOH of the cobalt(II) complex [Co(LSal,2-Ph )2 ] (1) with the sterically demanding Schiff-base ligand 2-(([1,1'-biphenyl]-2-ylimino)methyl)phenol (HLSal,2-Ph ) shows the thus far largest dihedral twist distortion between the two chelate planes compared to an ideal pseudotetrahedral arrangement. The cobalt(II) ion in 1 ⋅ 2MeOH exhibits an easy-axis anisotropy leading to a spin-reversal barrier of 55.3 cm-1 , which corresponds to an increase of about 17 % induced by the larger dihedral twist compared to the solvent-free complex 1. The magnetic relaxation for 1 ⋅ 2MeOH is significantly slower compared to 1. An in-depth frequency-domain Fourier-transform (FD-FT) THz-EPR study not only allowed the direct measurement of the magnetic transition between the two lowest Kramers doublets for the cobalt(II) complexes, but also revealed the presence of spin-phonon coupling. Interestingly, a similar dihedral twist correlation is also observed for a second pair of cobalt(II)-based solvomorphs, which could be benchmarked by FD-FT THz-EPR.
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Affiliation(s)
- Maximilian H Pohle
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489, Berlin, Germany.,present address: Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
| | - Sven Ziegenbalg
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Louis Blechschmidt
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489, Berlin, Germany.,EPR Research Group, MPI for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07743, Jena, Germany
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Kintzel B, Böhme M, Plaul D, Görls H, Yeche N, Seewald F, Klauss HH, Zvyagin AA, Kampert E, Herrmannsdörfer T, Pascua G, Baines C, Luetkens H, Plass W. A Trinuclear High-Spin Iron(III) Complex with a Geometrically Frustrated Spin Ground State Featuring Negligible Magnetic Anisotropy and Antisymmetric Exchange. Inorg Chem 2023; 62:3420-3430. [PMID: 36796032 DOI: 10.1021/acs.inorgchem.2c03455] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The trinuclear high-spin iron(III) complex [Fe3Cl3(saltagBr)(py)6]ClO4 {H5saltagBr = 1,2,3-tris[(5-bromo-salicylidene)amino]guanidine} was synthesized and characterized by several experimental and theoretical methods. The iron(III) complex exhibits molecular 3-fold symmetry imposed by the rigid ligand backbone and crystallizes in trigonal space group P3̅ with the complex cation lying on a crystallographic C3 axis. The high-spin states (S = 5/2) of the individual iron(III) ions were determined by Mößbauer spectroscopy and confirmed by CASSCF/CASPT2 ab initio calculations. Magnetic measurements show an antiferromagnetic exchange between the iron(III) ions leading to a geometrically spin-frustrated ground state. This was complemented by high-field magnetization experiments up to 60 T, which confirm the isotropic nature of the magnetic exchange and negligible single-ion anisotropy for the iron(III) ions. Muon-spin relaxation experiments were performed and further prove the isotropic nature of the coupled spin ground state and the presence of isolated paramagnetic molecular systems with negligible intermolecular interactions down to 20 mK. Broken-symmetry density functional theory calculations are consistent with the antiferromagnetic exchange between the iron(III) ions within the presented trinuclear high-spin iron(III) complex. Ab initio calculations further support the absence of appreciable magnetic anisotropy (D = 0.086, and E = 0.010 cm-1) and the absence of significant contributions from antisymmetric exchange, as the two Kramers doublets are virtually degenerate (ΔE = 0.005 cm-1). Therefore, this trinuclear high-spin iron(III) complex should be an ideal candidate for further investigations of spin-electric effects arising exclusively from the spin chirality of a geometrically frustrated S = 1/2 spin ground state of the molecular system.
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Affiliation(s)
- Benjamin Kintzel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - Daniel Plaul
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - Nicolas Yeche
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - Felix Seewald
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - Hans-Henning Klauss
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - Andrei A Zvyagin
- Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, Kharkiv 61103, Ukraine.,V. N. Karazin Kharkiv National University, Kharkiv 61022, Ukraine.,Max-Planck Institut für Physik komplexer Systeme, 01187 Dresden, Germany
| | - Erik Kampert
- Hochfeld-Magnetlabor Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - Thomas Herrmannsdörfer
- Hochfeld-Magnetlabor Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - Gwendolyne Pascua
- Laboratory for Muon Spin Spectroscopy, Paul-Scherrer-Institute, 5232 Villigen, Switzerland
| | - Christopher Baines
- Laboratory for Muon Spin Spectroscopy, Paul-Scherrer-Institute, 5232 Villigen, Switzerland
| | - Hubertus Luetkens
- Laboratory for Muon Spin Spectroscopy, Paul-Scherrer-Institute, 5232 Villigen, Switzerland
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
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5
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Münster K, Baabe D, Kintzel B, Böhme M, Plass W, Raeder J, Walter MD. Low-Coordinate Iron(II) Amido Half-Sandwich Complexes with Large Internal Magnetic Hyperfine Fields. Inorg Chem 2022; 61:18883-18898. [DOI: 10.1021/acs.inorgchem.2c02768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Katharina Münster
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
| | - Dirk Baabe
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
| | - Benjamin Kintzel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena07743, Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena07743, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena07743, Germany
| | - Jan Raeder
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
| | - Marc D. Walter
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
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6
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Böhme M, Rams M, Krebs C, Mangelsen S, Jess I, Plass W, Näther C. Co(NCS) 2 Chain Compound with Alternating 5- and 6-Fold Coordination: Influence of Metal Coordination on the Magnetic Properties. Inorg Chem 2022; 61:16841-16855. [PMID: 36218356 DOI: 10.1021/acs.inorgchem.2c02813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of Co(NCS)2 with 3-bromopyridine leads to the formation of discrete complexes [Co(NCS)2(3-bromopyridine)4] (1), [Co(NCS)2(3-bromopyridine)2(H2O)2] (2), and [Co(NCS)2(3-bromopyridine)2(MeOH)2] (3) depending on the solvent. Thermogravimetric measurements on 2 and 3 show a transformation into [Co(NCS)2(3-bromopyridine)2]n (4), which upon further heating is converted to [{Co(NCS)2}2(3-bromopyridine)3]n (5), whereas 1 transforms directly into 5 upon heating. Compound 5 can also be obtained from solution, which is not possible for 4. In 4 and 5, the cobalt(II) cations are linked by pairs of μ-1,3-bridging thiocyanate anions into chains. In compound 4, all cobalt(II) cations are octahedrally coordinated (OC-6), as is usually observed in such compounds, whereas in 5, a previously unkown alternating 5- and 6-fold coordination is observed, leading to vacant octahedral (vOC-5) and octahedral (OC-6) environments, respectively. In contrast to 4, the chains in 5 are very efficiently packed and linked by π···π stacking of the pyridine rings and interchain Co···Br interactions, which is the basis for the formation of this unusual chain. The spin chains in 4 demonstrate ferromagnetic intrachain exchange and much weaker interchain interactions, as is usually observed for such linear chain compounds. In contrast, compound 5 shows almost single-ion-like magnetic susceptibility, but the magnetic ordering temperature deduced from specific heat measurements is twice as high as that in 4, which might originate from π···π stacking and Co···Br interactions between neighboring chains. More importantly, unlike all linear Co(NCS)2 chain compounds, a dominant antiferromagnetic exchange is observed for 5, which is explained by density functional theory calculations predicting an alternating ferro- and aniferromagnetic exchange within the chains. Theoretical calculations on the two different cobalt(II) ions present in 5 predict an easy-axis anisotropy that is much stronger for the octahedral cobalt(II) ion than for the one with the vacant octahedral coordination, with the magnetic axes of the two ions being canted by an angle of 84°. This almost orthogonal orientation of the easy axis of magnetization for the two cobalt(II) ions is the rationale for the observed non-Ising behavior of 5.
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Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena 07743, Germany
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, Kraków 30348, Poland
| | - Christoph Krebs
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, Kiel 24118, Germany
| | - Sebastian Mangelsen
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, Kiel 24118, Germany
| | - Inke Jess
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, Kiel 24118, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena 07743, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, Kiel 24118, Germany
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7
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Roy S, Böhme M, Lima S, Mohanty M, Banerjee A, Buchholz A, Plass W, Rathnam S, Banerjee I, Kaminsky W, Dinda R. Methoxido‐Bridged Lacunary Heterocubane Oxidovanadium(IV) Cluster with Azo Ligands: Synthesis, X‐ray Structure, Magnetic Properties, and Antiproliferative Activity. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Satabdi Roy
- National Institute of Technology Rourkela department of chemistry INDIA
| | - Michael Böhme
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institut für Anorganische und Analytische Chemie GERMANY
| | - Sudhir Lima
- National Institute of Technology Rourkela Department of Chemistry INDIA
| | - Monalisa Mohanty
- National Institute of Technology Rourkela Department of Chemisry INDIA
| | - Atanu Banerjee
- National Institute of Technology Rourkela Department of Chemistry INDIA
| | - Axel Buchholz
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institut für Anorganische und Analytische Chemie GERMANY
| | - Winfried Plass
- Friedrich-Schiller-Universitat Jena Anorganische und Analytische Chemie Humboldtstr. 8 7743 Jena GERMANY
| | - Sharan Rathnam
- National Institute of Technology Rourkela Department of Biotechnology and Medical Engineering INDIA
| | - Indranil Banerjee
- National Institute of Technology Rourkela Department of Biotechnology and Medical Engineering INDIA
| | - Werner Kaminsky
- University of Washington Department of Chemistry UNITED STATES
| | - Rupam Dinda
- National Institute of Technology Rourkela Department of Chemsitry INDIA
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8
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Abou Fayssal S, El Sebaaly Z, Alsanad MA, Najjar R, Böhme M, Yordanova MH, Sassine YN. Combined effect of olive pruning residues and spent coffee grounds on Pleurotus ostreatus production, composition, and nutritional value. PLoS One 2021; 16:e0255794. [PMID: 34559813 PMCID: PMC8462683 DOI: 10.1371/journal.pone.0255794] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/23/2021] [Indexed: 12/17/2022] Open
Abstract
No previous study assessed the combined effect of olive pruning residues (OLPR) and spent coffee grounds (SCG) on P. ostreatus production and nutritional value. The aim of this study was to determine the capacity of P. ostreatus to degrade lignocellulosic nature of combined OLPR and SCG as well as their resultant nutrient composition. A complete randomized design was adopted with five treatments: S1:100%wheat straw (WS) (control), S2:33%WS+33%SCG+33%OLPR,S3:66%WS+17%SCG+17%OLPR,S4:17%WS+66%SCG+17%OLPR, and S5:17%WS+17%SCG+66%OLPR, and ten replicates per treatment. Substrate's and mushroom's composition were analyzed on chemical scale, including fatty acids and heavy metals profiles, following international standards. Only S1, S2, and S3 were productive, with comparable biological yield, economical yield, and biological efficiency. Organic matter loss decreased with increasing proportions of OLPR and SCG. Percentage lignin loss was higher in S1 than in S2 and S3 (53.51, 26.25, and 46.15% respectively). Mushrooms of S3 had some enhanced nutritional attributes compared to control: decrease in fat, increase in protein, increase in monounsaturated fatty acids, and lower zinc accumulation. Lead was less accumulated in S2 than S1 mushrooms. Sodium content of mushroom decreased in S2 and S3. The latter substrates yielded mushrooms with lower polyunsaturated fatty acids (PUFA) and higher saturated fatty acids (SFA) contents. All mushrooms had a valuable PUFA/SFA. This study suggests using OLPR and SCG in low proportions as nutritional supplements to the commercial wheat straw.
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Affiliation(s)
- Sami Abou Fayssal
- Department of Agronomy, Faculty of Agronomy, University of Forestry, Sofia, Bulgaria
- Department of Plant Production, Faculty of Agriculture, Lebanese University, Beirut, Lebanon
| | - Zeina El Sebaaly
- Department of Plant Production, Faculty of Agriculture, Lebanese University, Beirut, Lebanon
| | - Mohammed A. Alsanad
- Department of Environment and Agricultural Natural Resources, College of Agricultural and Food Sciences, King Faisal University, Al Ahsa, Saudi Arabia
| | - Rita Najjar
- Department of Physics, Faculty of Sciences IV, Lebanese University, Zahle, Lebanon
| | - Michael Böhme
- Horticulture Department, Humboldt Universität zu Berlin, Berlin, Germany
| | - Milena H. Yordanova
- Department of Agronomy, Faculty of Agronomy, University of Forestry, Sofia, Bulgaria
| | - Youssef N. Sassine
- Department of Plant Production, Faculty of Agriculture, Lebanese University, Beirut, Lebanon
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9
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Ceglarska M, Böhme M, Neumann T, Plass W, Näther C, Rams M. Magnetic investigations of monocrystalline [Co(NCS) 2(L) 2] n: new insights into single-chain relaxations. Phys Chem Chem Phys 2021; 23:10281-10289. [PMID: 33903874 DOI: 10.1039/d1cp00719j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A large single crystal of a compound from the family of coordination polymer [Co(NCS)2(L)2]n chains was synthesized and its magnetic properties are reported. [Co(NCS)2(4-(3-phenylpropyl)pyridine)2]n is ferromagnetic with Tc = 3.39 K. Single-ion ab initio calculations predict an almost Ising-type magnetic anisotropy and the direction of the magnetic easy-axis nearly along the Co-Npy bond of the apical pyridine-based co-ligand. Both predictions are confirmed by single-crystal magnetic measurements. The magnetic relaxation of the single crystal sample significantly differs from the powder sample data, and clearly shows the presence of two separate relaxation processes. The process dominant below 3.2 K demonstrates a single chain magnet (SCM) behaviour, with a crossover between single-wall and two-wall processes, in spite of the fact that the system is ferromagnetically ordered. The faster process that dominates just below Tc is attributed to spin waves. Micromagnetic Monte Carlo simulations of the investigated compound show that the dipolar field cancels for some chains located at the border between 3-dimensional domains. Such chains are responsible for the measured ac signal, and demonstrate the SCM behaviour. The quantitative analysis of the SCM relaxation time is supported by preparing and examining a corresponding diamagnetically diluted compound, [CoxCd1-x(NCS)2(4-(3-phenylpropyl)pyridine)2]n (x = 0.013), which behaves as a field-induced single-ion magnet. The relaxation pathways for single Co(ii) spins are determined to be Raman, direct, and quantum tunneling processes, which were included in an improved approach to describe the magnetic relaxation in the Co(ii)-based SCM compound.
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Affiliation(s)
- Magdalena Ceglarska
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland.
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Tristan Neumann
- Institut für Anorganische Chemie, Christian-Albrechts-Universität, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland.
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10
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Kintzel B, Fittipaldi M, Böhme M, Cini A, Tesi L, Buchholz A, Sessoli R, Plass W. Spin-Electric Coupling in a Cobalt(II)-Based Spin Triangle Revealed by Electric-Field-Modulated Electron Spin Resonance Spectroscopy. Angew Chem Int Ed Engl 2021; 60:8832-8838. [PMID: 33511751 PMCID: PMC8048656 DOI: 10.1002/anie.202017116] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Indexed: 11/18/2022]
Abstract
A cobalt(II)-based spin triangle shows a significant spin-electric coupling. [Co3 (pytag)(py)6 Cl3 ]ClO4 ⋅3 py crystallizes in the acentric monoclinic space group P21 . The intra-triangle antiferromagnetic interaction, of the order of ca. -15 cm-1 (H=-JSa Sb ), leads to spin frustration. The two expected energy-degenerate ground doublets are, however, separated by a few wavenumbers, as a consequence of magnetic anisotropy and deviations from threefold symmetry. The Co3 planes of symmetry-related molecules are almost parallel, allowing for the determination of the spin-electric properties of single crystals by EFM-ESR spectroscopy. The spin-electric effect detected when the electric field is applied in the Co3 plane was revealed by a shift in the resonance field. It was quantified as ΔgE /E=0.11×10-9 m V-1 , which in terms of frequency corresponds to approximately 0.3 Hz m V-1 . This value is comparable to what was determined for a Cu3 triangle despite the antiferromagnetic interaction being 20 times larger for the latter.
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Affiliation(s)
- Benjamin Kintzel
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität JenaHumboldtstrasse 807743JenaGermany
| | - Maria Fittipaldi
- Department of Physics and AstronomyUniversity of Florence and INSTM UdRvia Sansone 1Sesto Fiorentino (FI)Italy
| | - Michael Böhme
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität JenaHumboldtstrasse 807743JenaGermany
| | - Alberto Cini
- Dipartimento di Chimica “Ugo Schiff”Universitá degli Studi FirenzeVia della Lastruccia 3–1350019Sesto Fiorentino (FI)Italy
| | - Lorenzo Tesi
- Dipartimento di Chimica “Ugo Schiff”Universitá degli Studi FirenzeVia della Lastruccia 3–1350019Sesto Fiorentino (FI)Italy
- Current address: Institute of Physical ChemistryUniversity of StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Axel Buchholz
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität JenaHumboldtstrasse 807743JenaGermany
| | - Roberta Sessoli
- Dipartimento di Chimica “Ugo Schiff”Universitá degli Studi FirenzeVia della Lastruccia 3–1350019Sesto Fiorentino (FI)Italy
| | - Winfried Plass
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität JenaHumboldtstrasse 807743JenaGermany
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11
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Kintzel B, Fittipaldi M, Böhme M, Cini A, Tesi L, Buchholz A, Sessoli R, Plass W. Spin‐elektrische Kopplung in einem Cobalt(II)‐basierten Spindreieck, gezeigt mithilfe elektrisches‐Feld‐modulierter Elektronenspinresonanzspektroskopie. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Benjamin Kintzel
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstraße 8 07743 Jena Deutschland
| | - Maria Fittipaldi
- Department of Physics and Astronomy University of Florence and INSTM UdR via Sansone 1 Sesto Fiorentino (FI) Italien
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstraße 8 07743 Jena Deutschland
| | - Alberto Cini
- Dipartimento di Chimica “Ugo Schiff” Universitá degli Studi Firenze Via della Lastruccia 3–13 50019 Sesto Fiorentino (FI) Italien
| | - Lorenzo Tesi
- Dipartimento di Chimica “Ugo Schiff” Universitá degli Studi Firenze Via della Lastruccia 3–13 50019 Sesto Fiorentino (FI) Italien
- Derzeitige Adresse: Institut für Physikalische Chemistry Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstraße 8 07743 Jena Deutschland
| | - Roberta Sessoli
- Dipartimento di Chimica “Ugo Schiff” Universitá degli Studi Firenze Via della Lastruccia 3–13 50019 Sesto Fiorentino (FI) Italien
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstraße 8 07743 Jena Deutschland
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12
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Jochim A, Rams M, Böhme M, Ceglarska M, Plass W, Näther C. Thermodynamically metastable chain and stable layered Co(NCS) 2 coordination polymers: thermodynamic relations and magnetic properties. Dalton Trans 2020; 49:15310-15322. [PMID: 33118568 DOI: 10.1039/d0dt03227a] [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: 01/11/2023]
Abstract
Reaction of Co(NCS)2 with 4-bromopyridine leads to the formation of discrete complexes with the composition Co(NCS)2(4-bromopyridine)4·(CH3CN)0.67 (1), Co(NCS)2(4-bromopyridine)2(H2O)2 (2), Co(NCS)2(4-bromopyridine)2(CH3OH)2 (3) and Co(NCS)2(4-bromopyridine)2(CH3CN)2 (4). Upon heating compounds 2 and 4 transform into a crystalline product with the composition Co(NCS)2(4-bromopyridine)2 (5-I) that also can easily be obtained from solution. In this compound, the Co cations are linked by single μ-1,3-bridging thiocyanate anions into layers. Thermal decomposition of 3 leads to a second isomer (5-II), which is thermodynamically metastable and can also be synthesized from solution under kinetic control. In contrast to 5-I, the Co cations are linked by pairs of anionic ligands into linear chains. The magnetic exchange is very weak in 5-I, but much stronger and ferromagnetic along the linear chains in 5-II. AF ordering in 5-II is reached at 3.05 K, and magnetic relaxation is observed at the metamagnetic transition with an Arrhenius barrier of 17.1(3) cm-1. Ab initio computational studies reveal a different type of magnetic anisotropy to be present in the two crystallographically - independent Co centers in 5-II.
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Affiliation(s)
- Aleksej Jochim
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118 Kiel, Germany.
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Krakow, Poland
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Magdalena Ceglarska
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Krakow, Poland
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118 Kiel, Germany.
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13
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Jochim A, Lohmiller T, Rams M, Böhme M, Ceglarska M, Schnegg A, Plass W, Näther C. Influence of the Coligand onto the Magnetic Anisotropy and the Magnetic Behavior of One-Dimensional Coordination Polymers. Inorg Chem 2020; 59:8971-8982. [PMID: 32551545 DOI: 10.1021/acs.inorgchem.0c00815] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Reaction of Co(NCS)2 with different coligands leads to the formation of three compounds with the general composition [Co(NCS)2(L)2]n (L = aniline (1), morpholine (2), and ethylenethiourea (3)). In all of these compounds the cobalt(II) cations are octahedrally coordinated by two trans thiocyanate N and S atoms and the apical donor atoms of the coligands and are linked into linear chains by pairs of anionic ligands. The magnetic behavior was investigated by a combination of static and dynamic susceptibility as well as specific-heat measurements, computational studies, and THz-EPR spectroscopy. All compounds show antiferromagnetic ordering as observed for similar compounds with pyridine derivatives as coligands. In contrast to the latter, for 1-3 significantly higher critical temperatures and no magnetic single-chain relaxations are observed, which can be traced back to stronger interchain interactions and a drastic change in the magnetic anisotropy of the metal centers. These results are discussed and compared with those of the pyridine-based compounds, which provides important insights into the parameters that govern the magnetic behavior of such one-dimensional coordination polymers.
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Affiliation(s)
- Aleksej Jochim
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstrasse 5, 12489 Berlin, Germany
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348 Kraków, Poland
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstrasse 8, 07743 Jena, Germany
| | - Magdalena Ceglarska
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348 Kraków, Poland
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstrasse 5, 12489 Berlin, Germany.,EPR Research Group, MPI for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstrasse 8, 07743 Jena, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118 Kiel, Germany
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14
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Böhme M, Jochim A, Rams M, Lohmiller T, Suckert S, Schnegg A, Plass W, Näther C. Variation of the Chain Geometry in Isomeric 1D Co(NCS) 2 Coordination Polymers and Their Influence on the Magnetic Properties. Inorg Chem 2020; 59:5325-5338. [PMID: 32091883 DOI: 10.1021/acs.inorgchem.9b03357] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two different isomers of [Co(NCS)2(4-chloropyridine)2]n (3C and 3L) were synthesized from solution and by thermal decomposition of Co(NCS)2(4-chloropyridine)2(H2O)2 (2), which show a different metal coordination leading to corrugated chains in 3C and to linear chains in 3L. Solvent mediated conversion experiments prove that 3C is thermodynamically stable at room temperature where 3L is metastable. Magnetic measurements reveal that the magnetic exchange in 3L is comparable to that observed for previously reported related chain compounds, whereas in 3C with corrugated chains, the ferromagnetic interaction within the chains is strongly suppressed. The magnetic ordering takes place at 2.85 and 0.89 K, for 3L and 3C, respectively, based on specific heat measurements. For 3L the field dependence of magnetic relaxations in antiferromagnetically ordered ferromagnetic chains is presented. In addition, 3L is investigated by FD-FT THz-EPR spectroscopy, revealing a ground to first excited state energy gap of 14.0 cm-1. Broken-symmetry DFT calculations for 3C and 3L indicate a ferromagnetic intrachain interaction. Ab initio CASSCF/CASPT2/RASSI-SO computational studies reveal significantly different single-ion anisotropies for the crystallographically independent cobalt(II) centers in 3C and 3L. Together with the geometry of the chains this explains the magnetic properties of 3C and 3L. The ab initio results also explain the weaker exchange interaction in 3C and 3L as compared to previously reported [Co(NCS)2(L)2]n compounds with linear chains.
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Affiliation(s)
- Michael Böhme
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Aleksej Jochim
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Krakow, Poland
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstrasse 5, 12489 Berlin, Germany
| | - Stefan Suckert
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstrasse 5, 12489 Berlin, Germany.,EPR Research Group, MPI for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Winfried Plass
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
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15
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Rams M, Jochim A, Böhme M, Lohmiller T, Ceglarska M, Rams MM, Schnegg A, Plass W, Näther C. Front Cover: Single‐Chain Magnet Based on Cobalt(II) Thiocyanate as XXZ Spin Chain (Chem. Eur. J. 13/2020). Chemistry 2020. [DOI: 10.1002/chem.202000370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Michał Rams
- Institute of Physics Jagiellonian University Łojasiewicza 11 30348 Kraków Poland
| | - Aleksej Jochim
- Institut für Anorganische Chemie Christian-Albrechts-Universität zu Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Thomas Lohmiller
- EPR4Energy Joint Lab Institut für Nanospektroskopie Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Kekuléstr. 5 12489 Berlin Germany
| | - Magdalena Ceglarska
- Institute of Physics Jagiellonian University Łojasiewicza 11 30348 Kraków Poland
| | - Marek M. Rams
- Institute of Physics Jagiellonian University Łojasiewicza 11 30348 Kraków Poland
| | - Alexander Schnegg
- EPR4Energy Joint Lab Institut für Nanospektroskopie Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Kekuléstr. 5 12489 Berlin Germany
- EPR Research Group MPI for Chemical Energy Conversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Christian Näther
- Institut für Anorganische Chemie Christian-Albrechts-Universität zu Kiel Max-Eyth-Straße 2 24118 Kiel Germany
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16
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Rams M, Jochim A, Böhme M, Lohmiller T, Ceglarska M, Rams MM, Schnegg A, Plass W, Näther C. Single-Chain Magnet Based on Cobalt(II) Thiocyanate as XXZ Spin Chain. Chemistry 2020; 26:2837-2851. [PMID: 31702081 PMCID: PMC7078958 DOI: 10.1002/chem.201903924] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 08/27/2019] [Indexed: 11/11/2022]
Abstract
The cobalt(II) in [Co(NCS)2 (4-methoxypyridine)2 ]n are linked by pairs of thiocyanate anions into linear chains. In contrast to a previous structure determination, two crystallographically independent cobalt(II) centers have been found to be present. In the antiferromagnetic state, below the critical temperature (Tc =3.94 K) and critical field (Hc =290 Oe), slow relaxations of the ferromagnetic chains are observed. They originate mainly from defects in the magnetic structure, which has been elucidated by micromagnetic Monte Carlo simulations and ac measurements using pristine and defect samples. The energy barriers of the relaxations are Δτ1 =44.9(5) K and Δτ2 =26.0(7) K for long and short spin chains, respectively. The spin excitation energy, measured by using frequency-domain EPR spectroscopy, is 19.1 cm-1 and shifts 0.1 cm-1 due to the magnetic ordering. Ab initio calculations revealed easy-axis anisotropy for both CoII centers, and also an exchange anisotropy Jxx /Jzz of 0.21. The XXZ anisotropic Heisenberg model (solved by using the density renormalization matrix group technique) was used to reconcile the specific heat, susceptibility, and EPR data.
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Affiliation(s)
- Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348, Kraków, Poland
| | - Aleksej Jochim
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743, Jena, Germany
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstr. 5, 12489, Berlin, Germany
| | - Magdalena Ceglarska
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348, Kraków, Poland
| | - Marek M Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348, Kraków, Poland
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstr. 5, 12489, Berlin, Germany.,EPR Research Group, MPI for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743, Jena, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
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17
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Böhme M, Schuch D, Buchholz A, Görls H, Plass W. Spin Interactions and Magnetic Anisotropy in a Triangular Nickel(II) Complex with Triaminoguanidine Ligand Framework. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.201900288] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie Friedrich‐Schiller‐Universität Jena Humboldtstraße 8 07743 Jena Germany
| | - Dirk Schuch
- Institut für Anorganische und Analytische Chemie Friedrich‐Schiller‐Universität Jena Humboldtstraße 8 07743 Jena Germany
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie Friedrich‐Schiller‐Universität Jena Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie Friedrich‐Schiller‐Universität Jena Humboldtstraße 8 07743 Jena Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie Friedrich‐Schiller‐Universität Jena Humboldtstraße 8 07743 Jena Germany
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18
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Rams M, Jochim A, Böhme M, Lohmiller T, Ceglarska M, Rams MM, Schnegg A, Plass W, Näther C. Single-Chain Magnet Based on Cobalt(II) Thiocyanate as XXZ Spin Chain. Chemistry 2020; 26:2765. [PMID: 32017267 DOI: 10.1002/chem.202000371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Invited for the cover of this issue is the group of Michał Rams at Jagiellonian University (Kraków, Poland) and colleagues at Christian-Albrechts-Universität zu Kiel, Friedrich-Schiller-Universität Jena, and Helmholtz-Zentrum Berlin. The image represents a 1D coordination polymer with Co(II) spins that are flipped by photons during an EPR experiment. Read the full text of the article at 10.1002/chem.201903924.
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Affiliation(s)
- Michał Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348, Kraków, Poland
| | - Aleksej Jochim
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743, Jena, Germany
| | - Thomas Lohmiller
- EPR4Energy Joint Lab, Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstr. 5, 12489, Berlin, Germany
| | - Magdalena Ceglarska
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348, Kraków, Poland
| | - Marek M Rams
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30348, Kraków, Poland
| | - Alexander Schnegg
- EPR4Energy Joint Lab, Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstr. 5, 12489, Berlin, Germany.,EPR Research Group, MPI for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743, Jena, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
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Doroshenko I, Böhme M, Buchholz A, Simonikova L, Plass W, Pinkas J. Octanuclear nickel phosphonate core forming extended and molecular structures. CrystEngComm 2020. [DOI: 10.1039/d0ce01055c] [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
Three new nickel(ii) phosphonate complexes {[Na2Ni8(L)6]·nSolv}m (L = SAA3− (1), BSAA3− (2), NAA3− (3); Solv = H2O, MeOH; m = ∞ (1, 2), 1 (3)) possessing a new octanuclear {Ni8} phosphonate core were obtained and studied in detail.
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Affiliation(s)
- Iaroslav Doroshenko
- Department of Chemistry
- Masaryk University
- CZ-61137 Brno
- Czech Republic
- CEITEC MU
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
| | - Lucie Simonikova
- Department of Chemistry
- Masaryk University
- CZ-61137 Brno
- Czech Republic
- CEITEC MU
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
| | - Jiri Pinkas
- Department of Chemistry
- Masaryk University
- CZ-61137 Brno
- Czech Republic
- CEITEC MU
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Böhme M, Plass W. How to link theory and experiment for single-chain magnets beyond the Ising model: magnetic properties modeled from ab initio calculations of molecular fragments. Chem Sci 2019; 10:9189-9202. [PMID: 32055306 PMCID: PMC6979495 DOI: 10.1039/c9sc02735a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 08/15/2019] [Indexed: 12/23/2022] Open
Abstract
Magnetic properties of coordination polymers like single-chain magnets (SCMs) are based on magnetic domains, which are formed due to magnetic exchange between neighboring anisotropic spin centers. However, the computational restrictions imposed by the high level of theory needed for an adequate ab initio quantum mechanical treatment on the basis of multi-reference methods for these systems limit the feasibility of such calculations to mononuclear fragments as appropriate structural cutouts for the metal centers along the chains. Hence, results from such calculations describe single-ion properties and cannot be directly correlated with experimental data representing magnetic domains. We present a theoretical approach based on n-membered Ising-spin rings with n = 3-12, which allows us to simulate magnetic domains and to derive important magnetic properties for SCM compounds. Magnetic exchange, which is not provided by calculations of mononuclear fragments, is obtained by fitting the theoretical magnetic susceptibility against experimental data. The presented approach is tested for cobalt(ii)-based SCMs with three types of repeating sequences, which differ in nuclearity and symmetry. The magnetic parameters derived using the presented approach were found to be in good agreement with the experimental data. Moreover, the energy spectra obtained for the three test cases using the presented approach are characteristic of a deviation of the individual systems from the ideal Ising behavior. An extrapolation technique towards larger systems (n > 12) is presented which can provide information on the statistical mean length of the magnetic domains in the three investigated SCM compounds.
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Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie , Friedrich-Schiller-Universität Jena , Humboldtstraße 8 , 07743 Jena , Germany . ; ; Tel: +49 3641 948130
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie , Friedrich-Schiller-Universität Jena , Humboldtstraße 8 , 07743 Jena , Germany . ; ; Tel: +49 3641 948130
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Böhme M, Ziegenbalg S, Aliabadi A, Schnegg A, Görls H, Plass W. Correction: Magnetic relaxation in cobalt(ii)-based single-ion magnets influenced by distortion of the pseudotetrahedral [N 2O 2] coordination environment. Dalton Trans 2019; 48:11142-11143. [PMID: 31292578 DOI: 10.1039/c9dt90143d] [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
Correction for 'Magnetic relaxation in cobalt(ii)-based single-ion magnets influenced by distortion of the pseudotetrahedral [N2O2] coordination environment' by Michael Böhme et al., Dalton Trans., 2018, 47, 10861-10873.
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Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Sven Ziegenbalg
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Azar Aliabadi
- Berlin Joint EPR Lab, Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, 12489 Berlin, Germany
| | - Alexander Schnegg
- Berlin Joint EPR Lab, Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, 12489 Berlin, Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
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Akintola O, Böhme M, Rudolph M, Buchholz A, Görls H, Plass W. Metal-Bonded Redox-Active Triarylamines and Their Interactions: Synthesis, Structure, and Redox Properties of Paddle-Wheel Copper Complexes. ChemistryOpen 2019; 8:271-284. [PMID: 30859054 PMCID: PMC6396145 DOI: 10.1002/open.201800243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/02/2018] [Indexed: 11/13/2022] Open
Abstract
Four new triphenylamine ligands with different substituents in the para position and their corresponding copper(II) complexes are reported. This study includes their structural, spectroscopic, magnetic, and electrochemical properties. The complexes possess a dinuclear copper(II) paddle‐wheel core, a building unit that is also common in metal‐organic frameworks. Electrochemical measurements demonstrate that the triphenylamine ligands and the corresponding complexes are susceptible to oxidation, resulting in the formation of stable radical cations. The square‐wave voltammograms observed for the complexes are similar to those of the ligands, except for a slight shift in potential. Square‐wave voltammetry data show that, in the complexes, these oxidations can be described as individual one‐electron processes centered on the coordinated ligands. Spectroelectrochemistry reveals that, during the oxidation of the complexes, no difference can be detected for the spectra of successively oxidized species. For the absorption bands of the oxidized species of the ligands and complexes, only a slight shift is observed. ESR spectra for the chemically oxidized complexes indicate ligand‐centered radicals. The copper ions of the paddle‐wheel core are strongly antiferromagnetic coupled. DFT calculations for the fully oxidized complexes indicate a very weak ferromagnetic coupling between the copper ions and the ligand radicals, whereas a very weak antiferromagnetic coupling is found among the ligand radicals.
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Affiliation(s)
- Oluseun Akintola
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Manfred Rudolph
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie Friedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
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Akintola O, Böhme M, Rudolph M, Buchholz A, Görls H, Plass W. Front Cover: Metal‐Bonded Redox‐Active Triarylamines and Their Interactions: Synthesis, Structure, and Redox Properties of Paddle‐Wheel Copper Complexes (ChemistryOpen 3/2019). ChemistryOpen 2019. [PMCID: PMC6398086 DOI: 10.1002/open.201900027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The Front Cover shows a scene illustrating the need to investigate the properties of building blocks for complex systems to enable the basic design of new functional materials. It shows a model of the investigated paddle‐wheel complexes with copper‐bonded triphenylamines. Both paddle‐wheel units and triarylamine linkers are basic constituents found in several frameworks such as the networks shown in the image. More information can be found in the Full Paper by O. Akintola et al. on page 266 in Issue 3, 2019 (DOI: 10.1002/open.201800243).![]()
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Affiliation(s)
- Oluseun Akintola
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Manfred Rudolph
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Axel Buchholz
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische ChemieFriedrich-Schiller-Universität Jena Humboldtstr. 8 07743 Jena Germany
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Akintola O, Böhme M, Rudolph M, Buchholz A, Görls H, Plass W. Metal-Bonded Redox-Active Triarylamines and Their Interactions: Synthesis, Structure, and Redox Properties of Paddle-Wheel Copper Complexes. ChemistryOpen 2019; 8:250. [PMID: 30868045 PMCID: PMC6398088 DOI: 10.1002/open.201900026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Invited for this month's cover picture is the group of Professor Winfried Plass at the Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Jena (Germany). The cover picture shows a scene illustrating the need to investigate the properties of building blocks for complex systems to enable the basic design of new functional materials. The utilized triphenylamine ligands are constituting parts of the currently investigated "Jena University Magnetic Polymer" (JUMP) series. Read the full text of their Full Paper at 10.1002/open.201800243.
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Affiliation(s)
- Oluseun Akintola
- Institute of Inorganic and Analytical ChemistryFriedrich-Schiller-Universität Jena, Humboldtstr. 807743JenaGermany
| | - Michael Böhme
- Institute of Inorganic and Analytical ChemistryFriedrich-Schiller-Universität Jena, Humboldtstr. 807743JenaGermany
| | - Manfred Rudolph
- Institute of Inorganic and Analytical ChemistryFriedrich-Schiller-Universität Jena, Humboldtstr. 807743JenaGermany
| | - Axel Buchholz
- Institute of Inorganic and Analytical ChemistryFriedrich-Schiller-Universität Jena, Humboldtstr. 807743JenaGermany
| | - Helmar Görls
- Institute of Inorganic and Analytical ChemistryFriedrich-Schiller-Universität Jena, Humboldtstr. 807743JenaGermany
| | - Winfried Plass
- Institute of Inorganic and Analytical ChemistryFriedrich-Schiller-Universität Jena, Humboldtstr. 807743JenaGermany
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Kintzel B, Böhme M, Liu J, Burkhardt A, Mrozek J, Buchholz A, Ardavan A, Plass W. Molecular electronic spin qubits from a spin-frustrated trinuclear copper complex. Chem Commun (Camb) 2018; 54:12934-12937. [PMID: 30302454 DOI: 10.1039/c8cc06741d] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trinuclear copper(ii) complex [Cu3(saltag)(py)6]ClO4 (H5saltag = tris(2-hydroxybenzylidene)triaminoguanidine) was synthesized and characterized by experimental as well as theoretical methods. This complex exhibits a strong antiferromagnetic coupling (J = -298 cm-1) between the copper(ii) ions, mediated by the N-N diazine bridges of the tritopic ligand, leading to a spin-frustrated system. This compound shows a T2 coherence time of 340 ns in frozen pyridine solution, which extends to 591 ns by changing the solvent to pyridine-d5. Hence, the presented compound is a promising candidate as a building block for molecular spintronics.
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Affiliation(s)
- Benjamin Kintzel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Junjie Liu
- The Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
| | - Anja Burkhardt
- Photon Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Jakub Mrozek
- The Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Arzhang Ardavan
- The Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
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Böhme M, Plass W. rhOver: Determination of magnetic anisotropy and related properties for dysprosium(III) single-ion magnets by semiempirical approaches utilizing Hartree-Fock wave functions. J Comput Chem 2018; 39:2697-2712. [DOI: 10.1002/jcc.25565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/26/2018] [Accepted: 07/31/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie, Lehrstuhl für Anorganische Chemie II; Friedrich-Schiller-Universität Jena; Humboldtstr. 8, 07743 Jena Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Lehrstuhl für Anorganische Chemie II; Friedrich-Schiller-Universität Jena; Humboldtstr. 8, 07743 Jena Germany
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Böhme M, Riemenschneider H, Voigt K, Balogh E, Sanftenberg L, Bergmann A. Pertussis-Impfstatus bei Medizinstudierenden: Eine internationale Multicenterstudie. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1667720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- M Böhme
- Bereich Allgemeinmedizin, Medizinische Klinik und Poliklinik III des Universitätsklinikums Carl Gustav Carus an der TU Dresden, Dresden, Deutschland
| | - H Riemenschneider
- Bereich Allgemeinmedizin, Medizinische Klinik und Poliklinik III des Universitätsklinikums Carl Gustav Carus an der TU Dresden, Dresden, Deutschland
| | - K Voigt
- Bereich Allgemeinmedizin, Medizinische Klinik und Poliklinik III des Universitätsklinikums Carl Gustav Carus an der TU Dresden, Dresden, Deutschland
| | - E Balogh
- Department of Public Health Medicine, University of Pécs Medical School, Pécs, Ungarn
| | - L Sanftenberg
- Institut für Allgemeinmedizin, Ludwig-Maximilians-Universität München, München, Deutschland
| | - A Bergmann
- Bereich Allgemeinmedizin, Medizinische Klinik und Poliklinik III des Universitätsklinikums Carl Gustav Carus an der TU Dresden, Dresden, Deutschland
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28
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Gabrys L, Heidemann C, Schmidt C, Baumert J, Teti A, Du Y, Paprott R, Ziese T, Banzer W, Böhme M, Borrmann B, Busse R, Freitag M, Hagen B, Holl R, Icks A, Kaltheuner M, Koch K, Kümmel S, Kuhn J, Kuß O, Laux G, Schubert I, Szecsenyi J, Uebel T, Zahn D, Scheidt-Nave C. Selecting and defining indicators for diabetes surveillance in Germany. J Health Monit 2018; 3:3-21. [PMID: 35586543 PMCID: PMC8852787 DOI: 10.17886/rki-gbe-2018-063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Mainly because of the large number of people affected and associated significant health policy implications, the Robert Koch Institute (RKI) is developing a public health surveillance system using diabetes as an example. In a first step to ensure long-term and comparable data collection and establish efficient surveillance structures, the RKI has defined a set of relevant indicators for diabetes surveillance. An extensive review of the available literature followed by a structured process of consensus provided the basis for a harmonised set of 30 core and 10 supplementary indicators. They correspond to the following four fields of activity: (1) reducing diabetes risk, (2) improving diabetes early detection and treatment, (3) reducing diabetes complications, (4) reducing the disease burden and overall costs of the disease. In future, in addition to the primary data provided by RKI health monitoring diabetes surveillance needs to also consider the results from secondary data sources. Currently, barriers to accessing this data remain, which will have to be overcome, and gaps in the data closed. The RKI intentends to continuously update this set of indicators and at some point apply it also to further chronic diseases with high public health relevance.
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Affiliation(s)
| | | | | | | | | | - Yong Du
- Robert Koch Institute, Berlin
| | | | | | | | | | | | | | | | - Bernd Hagen
- Central Research Institute of Ambulatory Health Care in Germany, Cologne
| | | | - Andrea Icks
- Heinrich Heine University Düsseldorf.,German Diabetes Center Düsseldorf.,German Center for Diabetes Research, Neuherberg
| | | | - Klaus Koch
- Institute of Quality and Efficiency in Health Care, Cologne
| | - Stefanie Kümmel
- Institute for Applied Quality Improvement and Research in Health Care, Göttingen
| | - Joseph Kuhn
- Bavarian Health and Food Safety Authority, Oberschleißheim
| | - Oliver Kuß
- Institute for Biometrics and Epidemiology at the German Diabetes Center, Düsseldorf
| | | | | | | | - Til Uebel
- German College of General Practitioners and Family Physicians, Berlin
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29
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Roy S, Böhme M, Dash SP, Mohanty M, Buchholz A, Plass W, Majumder S, Kulanthaivel S, Banerjee I, Reuter H, Kaminsky W, Dinda R. Anionic Dinuclear Oxidovanadium(IV) Complexes with Azo Functionalized Tridentate Ligands and μ-Ethoxido Bridge Leading to an Unsymmetric Twisted Arrangement: Synthesis, X-ray Structure, Magnetic Properties, and Cytotoxicity. Inorg Chem 2018; 57:5767-5781. [DOI: 10.1021/acs.inorgchem.8b00035] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Satabdi Roy
- Department of Chemistry, Indian Institute of Technology, Kanpur, 208016 Uttar Pradesh, India
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Subhashree P. Dash
- Department of Basic Sciences, Parala Maharaja Engineering College, Sitalapalli, Brahmapur, Odisha 761003, India
| | | | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | | | | | | | - Hans Reuter
- Institute of Chemistry of New Materials, University of Osnabrück, Barbarastraße 6, 49069 Osnabrück, Germany
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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Böhme M, Ziegenbalg S, Aliabadi A, Schnegg A, Görls H, Plass W. Magnetic relaxation in cobalt(ii)-based single-ion magnets influenced by distortion of the pseudotetrahedral [N2O2] coordination environment. Dalton Trans 2018; 47:10861-10873. [DOI: 10.1039/c8dt01530a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cobalt(ii) complexes with different dihedral angles between the bidentate ligands show a significant variation in their magnetic relaxation behavior.
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Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
| | - Sven Ziegenbalg
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
| | - Azar Aliabadi
- Berlin Joint EPR Lab
- Institute for Nanospectroscopy
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
| | - Alexander Schnegg
- Berlin Joint EPR Lab
- Institute for Nanospectroscopy
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
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31
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Plaul D, Böhme M, Ostrovsky S, Tomkowicz Z, Görls H, Haase W, Plass W. Modeling Spin Interactions in a Triangular Cobalt(II) Complex with Triaminoguanidine Ligand Framework: Synthesis, Structure, and Magnetic Properties. Inorg Chem 2017; 57:106-119. [DOI: 10.1021/acs.inorgchem.7b02229] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel Plaul
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Michael Böhme
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Serghei Ostrovsky
- Institute of Applied Physics, Academy of Sciences of Moldova, Academiei str.5, MD-2028, Chisinau, Moldova
| | - Zbigniew Tomkowicz
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Krakow, Poland
| | - Helmar Görls
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Wolfgang Haase
- Eduard-Zintl-Institute
of Inorganic and Physical Chemistry, Darmstadt University of Technology, Alarich-Weiss-Str. 4, 64287 Darmstadt, Germany
| | - Winfried Plass
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
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Lorenz V, Liebing P, Böhme M, Buchholz A, Plass W, Geue N, Hilfert L, Busse S, Engelhardt F, Hrib CG, Edelmann FT. Lanthanide(III) Sandwich and Half‐Sandwich Complexes with Bulky Cyclooctatetraenyl Ligands: Synthesis, Structures, and Magnetic Properties. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700878] [Citation(s) in RCA: 10] [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: 11/08/2022]
Affiliation(s)
- Volker Lorenz
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Phil Liebing
- Laboratorium für Anorganische Chemie ETH Zürich Vladimir‐Prelog‐Weg 1–5/10 8093 Zürich Switzerland
| | - Michael Böhme
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Axel Buchholz
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Winfried Plass
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Niklas Geue
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Liane Hilfert
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Sabine Busse
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Felix Engelhardt
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
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Ubrig B, Böhme M, Merklinghaus A, Wagenlehner F. [Community acquired urinary tract infections - association with risk factors : Changes in causative organisms and resistance over time]. Urologe A 2017; 56:773-778. [PMID: 28451747 DOI: 10.1007/s00120-017-0401-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Published studies on community-acquired urinary tract infections (UTI) often do not link microbiological findings with clinical risk factors and patient data. MATERIALS AND METHODS We retrospectively correlated clinical findings of all patients with UTI of a urological outpatient clinic with the respective microbiological analysis of their urine samples over 2 periods of time: (A: 2005-2006 and B: 2011-2012). Patients were stratified to the following risk groups: uncomplicated cystitis, diabetes mellitus type 2, nursing home resident, prostatitis/epidydimitis, permanent catheter. RESULTS The incidence of Escherichia coli (p < 0.001) and proteus (p < 0.001) significantly decreased from period A to B, while enterococci (p = 0.003) and staphylococci (p < 0.001) significantly increased. Antibiotic sensitivity to fosfomycin (p < 0.001), doxycycline (p < 0.001), nitrofurantoin (p < 0.001), and nitroxoline increased (p < 0. 001) and sensitivity to amoxicillin (p < 0.001) and gentamicin decreased (p < 0.001). Patients with a permanent catheter had significantly poorer sensitivity rates (50% and less) for almost all antibiotics tested compared to the overall group. The risk of a UTI with 3MRGN or MRSA bacteria was significantly higher for catheter carriers and nursing home residents. CONCLUSIONS Empiric antibiotic first-line therapy with nitrofurantoin and fosfomycin for uncomplicated community acquired UTIs are well indicated in conformity with guidelines. The accumulation of multiresistant pathogens in patients with a permanent bladder catheter requires restrictive use of any permanent catheter drainage.
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Affiliation(s)
- B Ubrig
- Klinik für Urologie, , Augusta-Kranken-Anstalt gGmbH, Bergstr. 26, 44791, Bochum, Deutschland.
| | - M Böhme
- Gemeinschaftspraxis für Urologie, Bochum-Wattenscheid, Bochum, Deutschland
| | - A Merklinghaus
- Klinik für Urologie, , Augusta-Kranken-Anstalt gGmbH, Bergstr. 26, 44791, Bochum, Deutschland
| | - F Wagenlehner
- Lehrstuhl für Urologie, Kinderurologie und Andrologie, Justus Liebig Universität Gießen, Gießen, Deutschland
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35
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Rams M, Böhme M, Kataev V, Krupskaya Y, Büchner B, Plass W, Neumann T, Tomkowicz Z, Näther C. Static and dynamic magnetic properties of the ferromagnetic coordination polymer [Co(NCS)2(py)2]n. Phys Chem Chem Phys 2017; 19:24534-24544. [PMID: 28852749 DOI: 10.1039/c7cp04189f] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The static and dynamic properties of the Ising like chain ferromagnet are studied by magnetic measurements and high field-high frequency ESR spectroscopy.
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Affiliation(s)
- Michał Rams
- Institute of Physics
- Jagiellonian University
- 30-348 Krakow
- Poland
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
| | - Vladislav Kataev
- Leibnitz Institute for Solid State and Materials Research
- IFW Dresden
- 01069 Dresden
- Germany
| | - Yulia Krupskaya
- Leibnitz Institute for Solid State and Materials Research
- IFW Dresden
- 01069 Dresden
- Germany
| | - Bernd Büchner
- Leibnitz Institute for Solid State and Materials Research
- IFW Dresden
- 01069 Dresden
- Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07743 Jena
- Germany
| | - Tristan Neumann
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- 24118 Kiel
- Germany
| | | | - Christian Näther
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- 24118 Kiel
- Germany
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36
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Rams M, Tomkowicz Z, Böhme M, Plass W, Suckert S, Werner J, Jess I, Näther C. Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)2 coordination polymers. Phys Chem Chem Phys 2017; 19:3232-3243. [DOI: 10.1039/c6cp08193b] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two 1D Co(NCS)2 coordination polymers were synthesized and their magnetic properties were investigated by susceptibility and specific heat measurements as well as DFT and ab initio calculations.
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Affiliation(s)
- Michał Rams
- Institute of Physics
- Jagiellonian University
- Łojasiewicza 11
- 30-348 Kraków
- Poland
| | - Zbigniew Tomkowicz
- Institute of Physics
- Jagiellonian University
- Łojasiewicza 11
- 30-348 Kraków
- Poland
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Universität Jena
- Humboldtstr. 8
- 07743 Jena
- Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Universität Jena
- Humboldtstr. 8
- 07743 Jena
- Germany
| | - Stefan Suckert
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
| | - Julia Werner
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
| | - Inke Jess
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
| | - Christian Näther
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
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37
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Pasayat S, Böhme M, Dhaka S, Dash SP, Majumder S, Maurya MR, Plass W, Kaminsky W, Dinda R. Synthesis, Theoretical Study and Catalytic Application of Oxidometal (Mo or V) Complexes: Unexpected Coordination Due to Ligand Rearrangement through Metal-Mediated C-C Bond Formation. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501465] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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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38
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Suckert S, Rams M, Böhme M, Germann LS, Dinnebier RE, Plass W, Werner J, Näther C. Synthesis, structures, magnetic, and theoretical investigations of layered Co and Ni thiocyanate coordination polymers. Dalton Trans 2016; 45:18190-18201. [DOI: 10.1039/c6dt03752f] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [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
Two new ferromagnetic layered Co(ii) and Ni(ii) thiocyanate coordination polymers were synthesized, structurally characterized and investigated for their magnetic behavior using susceptibility measurements and theoretical methods.
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Affiliation(s)
- Stefan Suckert
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- 24118 Kiel
- Germany
| | - Michał Rams
- Institute of Physics
- Jagiellonian University
- 30-348 Krakow
- Poland
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Universität Jena
- 07743 Jena
- Germany
| | - Luzia S. Germann
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
- Germany
| | | | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Universität Jena
- 07743 Jena
- Germany
| | - Julia Werner
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- 24118 Kiel
- Germany
| | - Christian Näther
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- 24118 Kiel
- Germany
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39
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Lommatzsch AP, Gutfleisch M, Dietzel M, Heimes B, Spital G, Böhme M, Bornfeld N, Pauleikhoff D. [Initial clinical experience in the treatment of vitreomacular traction and macular holes with ocriplasmin]. Klin Monbl Augenheilkd 2014; 231:909-14. [PMID: 24788606 DOI: 10.1055/s-0034-1368372] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND The introduction and approval of Ocriplasmin as an intravitreally applicable drug in the pharmocological treatment of vitreomacular traction represents a new therapeutic approach possibly avoiding vitreoretinal surgery. With our article we report our first experience wih Ocriplasmin in clinical practice. METHODS The indication for intravitreal therapy with Ocriplasmin was provided for symptomatic VMT or macular hole with VMT in 20 patients since March 2013. Surgery was planned in cases with remaining symptoms. Before IVI we performed SD-OCT. Best visual acuity (BCVA) was evaluated preoperatively, 7 and 28 days after treatment and finally every month in 14 treated eyes. SD-OCT images were analysed before treatment and later on with every follow-up examination. In addition to functional and morphological changes we analysed all side effects. RESULTS The mean BCVA at the beginning of treatment was 0.3 and 0.4 before injection. The indications for treatment were as follows: symptomatic VMT in 10 patients and 4 patients suffering from full thickness macular hole stage 2. In 3 patients spontaneous regression of VMT could be observed with increasing of vision from 0.3 to 0.5. In one patient his macular hole was closed and BCVA increased from 0.2 to 0.6 within 7 days. Two patients showed significant enlargement of their macular holes after 7 days and finally underwent surgery. A massive cystoid macular oedema occurred in one patient. No change in the SD-OCT image could be observed 28 days after treatment. The mean visual acuity improved to 0.6 during a follow-up period of 90 days. Photopsia and disturbing vitreous opacities up to 28 days post injection could be regarded as minor side effects. CONCLUSION Our first clinical experience with intravitreous injection of Ocriplasmin were performed to confirm the presumed therapeutic effect in patients suffering from VMT. Small macular holes could frequently be closed. The possibility of special side effects must be taken in consideration just as the possibility of spanteous improvement before performing IVI with Ocriplasmin. Further prospective studies must be recommended to be right about Ocriplasmin injections.
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Affiliation(s)
| | - M Gutfleisch
- St. Franziskus Hospital, Augenabteilung, Münster
| | - M Dietzel
- St. Franziskus Hospital, Augenabteilung, Münster
| | - B Heimes
- St. Franziskus Hospital, Augenabteilung, Münster
| | - G Spital
- St. Franziskus Hospital, Augenabteilung, Münster
| | - M Böhme
- Universität Essen-Duisburg, Universitätsaugenklinik, Essen
| | - N Bornfeld
- Universität Essen-Duisburg, Universitätsaugenklinik, Essen
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40
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Alemayehu M, Amede T, Böhme M, Peters K. Collective management on communal grazing lands: Its impact on vegetation attributes and soil erosion in the upper Blue Nile basin, northwestern Ethiopia. Livest Sci 2013. [DOI: 10.1016/j.livsci.2013.06.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Mohammadnezhad G, Böhme M, Geibig D, Burkhardt A, Görls H, Plass W. Chiral vanadium(v) complexes with 2-aminoglucose Schiff-base ligands and their solution configurations: synthesis, structures, and DFT calculations. Dalton Trans 2013; 42:11812-23. [DOI: 10.1039/c3dt50890k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Gebhardt K, Böhme M, von der Emde G. Electrocommunication behaviour during social interactions in two species of pulse-type weakly electric fishes (Mormyridae). J Fish Biol 2012; 81:2235-2254. [PMID: 23252737 DOI: 10.1111/j.1095-8649.2012.03448.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This study compares electrocommunication behaviour in groups of freely swimming weakly electric fishes of two species, Marcusenius altisambesi and Mormyrus rume. Animals emitted variable temporal sequences of stereotyped electric organ discharges (EOD) that served as communication signals. While the waveform of individual signals remained constant, the inter-discharge interval (IDI) patterns conveyed situation-specific information. Both species showed different types of group behaviour, e.g. they engaged in collective (group) foraging. The results show that in each species, during different behavioural conditions (resting, foraging and agonistic encounters), certain situation-specific IDI patterns occurred. In both species, neighbouring fishes swimming closely together interacted electrically by going in and out of synchronization episodes, i.e. periods of temporally correlated EOD production. These often resulted in echo responses between neighbours. During group foraging, fishes often signalled in a repetitive fixed order (fixed-order signalling). During foraging, EOD emission rates of M. altisambesi were higher and more regular than those of M. rume. The two species also differed in the quantity of group behaviours with M. altisambesi being more social than M. rume, which was reflected in the lack of specific agonistic IDI patterns, more fixed-order signalling and more communal resting behaviour in M. altisambesi.
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Affiliation(s)
- K Gebhardt
- University of Bonn, Institute of Zoology, Department of Neuroethology/Sensory Ecology, Endenicher Allee 11-13, 53115 Bonn, Germany
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43
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Khatri M, Schlörb H, Fähler S, Schultz L, Nandan B, Böhme M, Krenek R, Stamm M. Electrodeposition of Co–Pt continuous films and nanowires within diblock copolymer template. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2008.05.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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44
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Abdel-Mawgoud A, El-Abd S, Böhme M, Sassine Y, Abou-Hadid A. WEEKLY FRUIT PRODUCTION OF SWEET PEPPER IN RELATION TO PLANT FRUIT LOAD MANIPULATION. Acta Hortic 2008:439-446. [DOI: 10.17660/actahortic.2008.779.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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45
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Böhme M, Schevchenko J, Pinker I, Herfort S. CUCUMBER GROWN IN SHEEPWOOL SLABS TREATED WITH BIOSTIMULATOR COMPARED TO OTHER ORGANIC AND MINERAL SUBSTRATES. ACTA ACUST UNITED AC 2008. [DOI: 10.17660/actahortic.2008.779.36] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Wahlgren CF, Böhme M, Bradley M, Svensson A. Attitudes and opinions among Swedish dermatologists concerning eczema (atopic dermatitis): results from a keypad session. J Eur Acad Dermatol Venereol 2007; 21:561-2. [PMID: 17374002 DOI: 10.1111/j.1468-3083.2006.01960.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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Benthin M, Böhme M, Zurwellen A, Demtröder F, Heike M, Schwenzer T. Vitamin D Mangel in der Schwangerschaft. Geburtshilfe Frauenheilkd 2006. [DOI: 10.1055/s-2006-952429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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48
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Böhme M. Distribution of water quality parameters in two cross-sections of the river Elbe measured with high local, temporal, and analytic resolution. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/aheh.200400627] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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49
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Schmidt-Naake G, Böhme M, Cabrera A. Synthesis of Proton Exchange Membranes with Pendent Phosphonic Acid Groups by Irradiation Grafting of VBC. Chem Eng Technol 2005. [DOI: 10.1002/ceat.200407143] [Citation(s) in RCA: 34] [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: 11/06/2022]
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50
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Abdel-Mawgoud A, El-Abd S, Stanghellini C, Böhme M, Abou-Hadid A. SWEET PEPPER CROP RESPONSES TO GREENHOUSE CLIMATE MANIPULATION UNDER SALINE CONDITIONS. Acta Hortic 2004:431-438. [DOI: 10.17660/actahortic.2004.659.57] [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] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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