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Braun J, Powell AK, Unterreiner AN. Gaining Insights into the Interplay between Optical and Magnetic Properties in Photoexcited Coordination Compounds. Chemistry 2024:e202400977. [PMID: 38693865 DOI: 10.1002/chem.202400977] [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: 03/08/2024] [Revised: 04/19/2024] [Accepted: 04/30/2024] [Indexed: 05/03/2024]
Abstract
We describe early and recent advances in the fascinating field of combined magnetic and optical properties of inorganic coordination compounds and in particular of 3d-4f single molecule magnets. We cover various applied techniques which allow for the correlation of results obtained in the frequency and time domain in order to highlight the specific properties of these compounds and the future challenges towards multidimensional spectroscopic tools. An important point is to understand the details of the interplay of magnetic and optical properties through performing time-resolved studies in the presence of external fields especially magnetic ones. This will enable further exploration of this fundamental interactions i.e. the two components of electromagnetic radiation influencing optical properties.
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Affiliation(s)
- Jonas Braun
- Karlsruher Institut fur Technologie, Inorganic Chemistry, GERMANY
| | - Annie K Powell
- Karlsruher Institut fur Technologie, Inorganic Chemistry, GERMANY
| | - Andreas Neil Unterreiner
- Karlsruhe Institute of Technology Faculty of Chemistry and Biosciences: Karlsruher Institut fur Technologie Fakultat fur Chemie und Biowissenschaften, Abteilung für Molekulare Physikalische Chemie, Fritz-Haber-Weg 2 Geb. 30.44, 76131, Karlsruhe, GERMANY
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2
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Peng Y, Braun J, Schulze M, Kaemmerer H, Schneider YF, Anson CE, Wernsdorfer W, Powell AK. A nested spin structure and single molecule magnet behaviour in an Fe 8Dy 12 heterometallic cyclic coordination cluster. Dalton Trans 2024; 53:894-897. [PMID: 38167674 DOI: 10.1039/d3dt04141g] [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: 01/05/2024]
Abstract
The 20-nuclearity compound [Fe8Dy12(tea)8(teaH)12(NO3)12]·8MeCN (where teaH3 = triethanolamine) was synthesised and characterised through single crystal X-ray diffraction and magnetic measurements. The shape of the magnetic hysteresis in the microSQUID measurements was rationalised using the MAGELLAN program.
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Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, P.R. China
| | - Jonas Braun
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Michael Schulze
- Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Hagen Kaemmerer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Yannik F Schneider
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.
| | - Wolfgang Wernsdorfer
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
- Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, P.R. China
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
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Yang B, Picchetti P, Wang Y, Wang W, Seeger C, Bozov K, Malik S, Mallach D, Schäfer AH, Ibrahim M, Hirtz M, Powell AK. Patterned immobilization of polyoxometalate-loaded mesoporous silica particles via amine-ene Michael additions on alkene functionalized surfaces. Sci Rep 2024; 14:1249. [PMID: 38218940 PMCID: PMC10787769 DOI: 10.1038/s41598-023-50846-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/27/2023] [Indexed: 01/15/2024] Open
Abstract
Polyoxometalates (POM) are anionic oxoclusters of early transition metals that are of great interest for a variety of applications, including the development of sensors and catalysts. A crucial step in the use of POM in functional materials is the production of composites that can be further processed into complex materials, e.g. by printing on different substrates. In this work, we present an immobilization approach for POMs that involves two key processes: first, the stable encapsulation of POMs in the pores of mesoporous silica nanoparticles (MSPs) and, second, the formation of microstructured arrays with these POM-loaded nanoparticles. Specifically, we have developed a strategy that leads to water-stable, POM-loaded mesoporous silica that can be covalently linked to alkene-bearing surfaces by amine-Michael addition and patterned into microarrays by scanning probe lithography (SPL). The immobilization strategy presented facilitates the printing of hybrid POM-loaded nanomaterials onto different surfaces and provides a versatile method for the fabrication of POM-based composites. Importantly, POM-loaded MSPs are useful in applications such as microfluidic systems and sensors that require frequent washing. Overall, this method is a promising way to produce surface-printed POM arrays that can be used for a wide range of applications.
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Affiliation(s)
- Bingquan Yang
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Pierre Picchetti
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Yangxin Wang
- Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
- College of Materials Science and Engineering, Nanjing Tech University, Puzhu Road(S) 30, 211816, Nanjing, People's Republic of China
| | - Wenjing Wang
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Christoph Seeger
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Kliment Bozov
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Sharali Malik
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Dennis Mallach
- nanoAnalytics GmbH, Heisenbergstraße 11, 48149, Münster, Germany
| | | | - Masooma Ibrahim
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany.
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany.
| | - Annie K Powell
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
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Braun J, Seufert D, Anson CE, Tang J, Powell AK. An Effectively Uncoupled Gd 8 Cluster Formed through Fixation of Atmospheric CO 2 Showing Excellent Magnetocaloric Properties. Int J Mol Sci 2023; 25:264. [PMID: 38203439 PMCID: PMC10779177 DOI: 10.3390/ijms25010264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
The [Gd8(opch)8(CO3)4(H2O)8]·4H2O·10MeCN coordination cluster (1) crystallises in P1¯. The Gd8 core is held together by four bridging carbonates derived from atmospheric CO2 as well as the carboxyhydrazonyl oxygens of the 2-hydroxy-3-methoxybenzylidenepyrazine-2-carbohydrazide (H2opch) Schiff base ligands. The magnetic measurements show that the GdIII ions are effectively uncoupled as seen from the low Weiss constant of 0.05 K needed to fit the inverse susceptibility to the Curie-Weiss law. Furthermore, the magnetisation data are consistent with the Brillouin function for eight independent GdIII ions. These features lead to a magnetocaloric effect with a high efficiency which is 89% of the theoretical maximum value.
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Affiliation(s)
- Jonas Braun
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany; (J.B.); (D.S.); (C.E.A.)
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Daniel Seufert
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany; (J.B.); (D.S.); (C.E.A.)
| | - Christopher E. Anson
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany; (J.B.); (D.S.); (C.E.A.)
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China;
| | - Annie K. Powell
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany; (J.B.); (D.S.); (C.E.A.)
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
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5
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Manvell AS, Pfleger R, Bonde NA, Briganti M, Mattei CA, Nannestad TB, Weihe H, Powell AK, Ollivier J, Bendix J, Perfetti M. LnDOTA puppeteering: removing the water molecule and imposing tetragonal symmetry. Chem Sci 2023; 15:113-123. [PMID: 38131074 PMCID: PMC10732010 DOI: 10.1039/d3sc03928e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023] Open
Abstract
Complexes of lanthanide(iii) ions (Ln) with tetraazacyclododecane-N,N',N'',N'''-tetraacetate (DOTA) are a benchmark in the field of magnetism due to their well-investigated and sometimes surprising features. Ab initio calculations suggest that the ninth ligand, an axial water molecule, is key in defining the magnetic properties because it breaks the potential C4 symmetry of the resulting complexes. In this paper, we experimentally isolate the role of the water molecule by excluding it from the metal coordination sphere without altering the chemical structure of the ligand. Our complexes are therefore designed to be geometrically tetragonal and strict crystallographic symmetry is achieved by exploiting a combination of solution ionic strength and solid state packing effects. A thorough multitechnique approach has been used to unravel the electronic structure and magnetic anisotropy of the complexes. Moreover, the geometry enhancement allows us to predict, using only one angle obtained from the crystal structure, the ground state composition of all the studied derivatives (Ln = Tb to Yb). Therefore, these systems also provide an excellent platform to test the validity and limitations of the ab initio methods. Our combined experimental and theoretical investigation proves that the water molecule is indeed key in defining the magnetic anisotropy and the slow relaxation of these complexes.
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Affiliation(s)
- Anna Schannong Manvell
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Rouven Pfleger
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany
| | - Niels Andreas Bonde
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
- Institut Laue-Langevin 71 avenue des Martyrs, CS 20156 38042 Grenoble Cedex 9 France
| | - Matteo Briganti
- Department of Chemistry U. Schiff Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Carlo Andrea Mattei
- Department of Chemistry U. Schiff Via della Lastruccia 3 50019 Sesto Fiorentino Italy
| | - Theis Brock Nannestad
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Høgni Weihe
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany
| | - Jacques Ollivier
- Institut Laue-Langevin 71 avenue des Martyrs, CS 20156 38042 Grenoble Cedex 9 France
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Mauro Perfetti
- Department of Chemistry U. Schiff Via della Lastruccia 3 50019 Sesto Fiorentino Italy
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6
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Al-Zeidaneen FK, Anson CE, Powell AK. A nickel(II) complex with an unsymmetrical tetra-dentate chelating ligand derived from pyridine-2,6-dicarbaldehyde and 2-amino-thio-phenol. Acta Crystallogr E Crystallogr Commun 2023; 79:791-794. [PMID: 37693667 PMCID: PMC10483564 DOI: 10.1107/s2056989023006692] [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: 07/05/2023] [Accepted: 08/01/2023] [Indexed: 09/12/2023]
Abstract
[(2-{[6-(1,3-Benzo-thia-zol-2-yl)pyridin-2-yl]carbonyl-aza-nid-yl}phen-yl)sulf-anido]nickel(II), [Ni(C19H11N3OS2)], crystallizes in the centrosymmetric monoclinic space group P21/n with one mol-ecule in the asymmetric unit. The expected ligand, a bis-Schiff base derived from pyridine-2,6-dicarbaldehyde and 2-amino-thio-phenol, had modified in situ in a both unexpected and unsymmetrical fashion. One arm had cyclized to form a benzo[d]thia-zol-2-yl functionality, while the imine linkage of the second arm had oxidized to an amide group. The geometry about the central NiII atom is distorted square-planar N3S. The mol-ecules form supra-molecular face-to-face dimers via rather strong π-π stacking inter-actions, with these dimers then linked into chains via pairwise C-H⋯O inter-actions.
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Affiliation(s)
| | - Christopher E. Anson
- Karlsruher Institut für Technologie (KIT), Institut für Anorganische Chemie, Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Annie K. Powell
- Karlsruher Institut für Technologie (KIT), Institut für Anorganische Chemie, Engesserstrasse 15, 76131 Karlsruhe, Germany
- Karlsruher Institut für Technologie (KIT), Institut für Nanotechologie, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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7
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Schray D, Westerbeck D, Braun J, Lan Y, Gómez-Coca S, Wernsdorfer W, Ruiz E, Anson CE, Schnack J, Powell AK. Fe-Gd Ferromagnetic Cyclic Coordination Cluster [Fe III4Gd III4(teaH) 8(N 3) 8(H 2O)] with Magnetic Anisotropy─Theory and Experiment. Inorg Chem 2023; 62:6642-6648. [PMID: 37068219 DOI: 10.1021/acs.inorgchem.3c00042] [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: 04/19/2023]
Abstract
The synthesis, structural, and magnetic characterization of [FeIII4LnIII4(teaH)8(N3)8(H2O)] (Ln = Gd and Y) and the previously reported isostructural Dy analogue are discussed. The commonly held belief that both FeIII and GdIII can be regarded as isotropic ions is shown to be an oversimplification. This conclusion is derived from the magnetic data for the YIII analogue in terms of the zero-field splitting seen for FeIII and from the fact that the magnetic data for the new GdIII analogue can only be fit employing an additional anisotropy term for the GdIII ions. Furthermore, the Fe4Gd4 ring shows slow relaxation of magnetization. Our analysis of the experimental magnetic data employs both density functional theory as well as the finite-temperature Lanczos method which finally enables us to provide an almost perfect fit of magnetocaloric properties.
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Affiliation(s)
- Dirk Schray
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Dennis Westerbeck
- Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
| | - Jonas Braun
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Yanhua Lan
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Wolfgang Wernsdorfer
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Physikalisches Institut (PHI), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Christopher E Anson
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Jürgen Schnack
- Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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8
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Gracia L, Barani E, Braun J, Carter AB, Fuhr O, Powell AK, Fink K, Bizzarri C. Fe
II
Catalyst based on 2,6‐Bis(1’,2’,3’‐triazolyl‐methyl)pyridine. Comparison with Analogues. ChemCatChem 2022. [DOI: 10.1002/cctc.202201377] [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: 11/13/2022]
Affiliation(s)
- Lisa‐Lou Gracia
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Elham Barani
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Jonas Braun
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Anthony B. Carter
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Olaf Fuhr
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Annie K. Powell
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology (KIT) Engesserstraße 15 76131 Karlsruhe Germany
| | - Karin Fink
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Claudia Bizzarri
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
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9
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Gracia LL, Barani E, Braun J, Carter AB, Fuhr O, Powell AK, Fink K, Bizzarri C. Photocatalytic reduction of CO2 by highly efficient homogeneous FeII catalyst based on 2,6‐bis(1’,2’,3’‐triazolyl‐methyl)pyridine. Comparison with analogues. ChemCatChem 2022. [DOI: 10.1002/cctc.202201163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lisa-Lou Gracia
- Karlsruher Institut für Technologie Campus Süd: Karlsruher Institut fur Technologie Institute of Organic Chemistry GERMANY
| | - Elham Barani
- Karlsruher Institut fur Technologie - Campus Nord INT GERMANY
| | - Jonas Braun
- Karlsruher Institut für Technologie Campus Süd: Karlsruher Institut fur Technologie AOC GERMANY
| | - Anthony Blue Carter
- Karlsruher Institut für Technologie Campus Süd: Karlsruher Institut fur Technologie AOC GERMANY
| | - Olaf Fuhr
- Karlsruher Institut fur Technologie - Campus Nord INT GERMANY
| | - Annie K. Powell
- Karlsruher Institut für Technologie Campus Süd: Karlsruher Institut fur Technologie AOC, INT GERMANY
| | - Karin Fink
- Karlsruher Institut fur Technologie - Campus Nord INT GERMANY
| | - Claudia Bizzarri
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT), GERMANY
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10
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Li XL, Zhao L, Wu J, Shi W, Struch N, Lützen A, Powell AK, Cheng P, Tang J. Subcomponent self-assembly of circular helical Dy 6(L) 6 and bipyramid Dy 12(L) 8 architectures directed via second-order template effects. Chem Sci 2022; 13:10048-10056. [PMID: 36128245 PMCID: PMC9430530 DOI: 10.1039/d2sc03156f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 07/20/2022] [Indexed: 11/26/2022] Open
Abstract
In situ metal-templated (hydrazone) condensation also called subcomponent self-assembly of 4,6-dihydrazino-pyrimidine, o-vanillin and dysprosium ions resulted in the formation of discrete hexa- or dodecanuclear metallosupramolecular Dy6(L)6 or Dy12(L)8 aggregates resulting from second-order template effects of the base and the lanthanide counterions used in these processes. XRD analysis revealed unique circular helical or tetragonal bipyramid architectures in which the bis(hydrazone) ligand L adopts different conformations and shows remarkable differences in its mode of metal coordination. While a molecule of trimethylamine acts as a secondary template that fills the void of the Dy6(L)6 assembly, sodium ions take on this role for the formation of heterobimetallic Dy12(L)8 by occupying vacant coordination sites, thus demonstrating that these processes can be steered in different directions upon subtle changes of reaction conditions. Furthermore, Dy6(L)6 shows an interesting spin-relaxation energy barrier of 435 K, which is amongst the largest values within multinuclear lanthanide single-molecular magnets.
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Affiliation(s)
- Xiao-Lei Li
- State Key Laboratory of Rare Earth Resource Utilization, Changch un Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University Tianjin 300071 P. R. China
| | - Lang Zhao
- State Key Laboratory of Rare Earth Resource Utilization, Changch un Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 P. R. China
| | - Jianfeng Wu
- State Key Laboratory of Rare Earth Resource Utilization, Changch un Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 P. R. China
| | - Wei Shi
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University Tianjin 300071 P. R. China
| | - Niklas Struch
- Kekulé Institute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn Gerhard-Domagk-Str. 1 D-53121 Bonn Germany
| | - Arne Lützen
- Kekulé Institute of Organic Chemistry and Biochemistry, Rheinische-Friedrich-Wilhelms-University of Bonn Gerhard-Domagk-Str. 1 D-53121 Bonn Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15, 76131 Karlsruhe Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1, Eggensteinn-Leopoldshafen 76344 Karlsruhe Germany
| | - Peng Cheng
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University Tianjin 300071 P. R. China
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource Utilization, Changch un Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 P. R. China
- University of Science and Technology of China Hefei 230026 P. R. China
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11
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Schork N, Ibrahim M, Baksi A, Krämer S, Powell AK, Guthausen G. NMR Relaxivities of Paramagnetic, Ultra-High Spin Heterometallic Clusters within Polyoxometalate Matrix as a Function of Solvent and Metal Ion. Chemphyschem 2022; 23:e202200215. [PMID: 35896954 DOI: 10.1002/cphc.202200215] [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: 03/31/2022] [Revised: 06/22/2022] [Indexed: 11/05/2022]
Abstract
Selectivity and image contrast are always challenging in magnetic resonance imaging (MRI), which are - inter alia - addressed by contrast agents. These compounds still need to be improved, and their relaxation properties, i. e., their paramagnetic relaxation enhancement (PRE), needs to be understood. The main goal is to improve specificity and relaxivities, especially at the high magnetic fields currently exploited not only in material science but also in the medical environment. Longitudinal and transverse relaxivities, r1 and r2 , which correspond to the longitudinal and transverse relaxation rates R1 and R2, normalized to the concentration of the paramagnetic moieties, need to be considered because both contribute to the image contrast. 1 H-relaxivities r1 and r2 of high-spin heterometallic clusters were studied containing lanthanide and transition-metal ions within a polyoxometalate matrix. A wide range of magnetic fields from 0.5 T/20 MHz to 33 T/1.4 GHz was applied. The questions addressed here concern the rotational and diffusion correlation times which determine the relaxivities and are affected by the solvent's viscosity. Moreover, the variation of the lanthanide and transition-metal ions of the clusters provided insights into the sensitivity of PRE with respect to the electron spin properties of the paramagnetic centers as well as cooperative effects between lanthanides and transition metal ions.
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Affiliation(s)
- Nicolas Schork
- Karlsruhe Institute of Technology (KIT), Institutes of Mechanical Engineering and Mechanics and of Water Chemistry and Technology, Adenauerring 20b, 76131, Karlsruhe, Germany
| | - Masooma Ibrahim
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Ananya Baksi
- Technische Universität Dortmund, Anorganische Chemie, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Steffen Krämer
- CNRS, LNCMI-EMFL, Université Grenoble Alpes, INSA-T, and UPS, Boîte Postale 166, 38042, Grenoble Cedex 9, France
| | - Annie K Powell
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstrasse 15, 76131, Karlsruhe, Germany.,Karlsruhe Institute of Technology (KIT), Institute for Quantum Materials and Technologies (IQMT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Gisela Guthausen
- Karlsruhe Institute of Technology (KIT), Institutes of Mechanical Engineering and Mechanics and of Water Chemistry and Technology, Adenauerring 20b, 76131, Karlsruhe, Germany
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12
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Akhtar MN, Mereacre V, Novitchi G, AlDamen MA, Anson CE, Powell AK. Synthesis, structures, and magnetic properties of Fe4-Ln2 (Ln = Tb, Ho, and Er) clusters with N, N, N′, N′-tetrakis-(2-hydroxyethyl)ethylenediamine. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Ruppert T, Schlittenhardt S, Suryadevara N, Fuhr O, Anson CE, Ruben M, Powell AK. Keeping dysprosium in line: Trinuclear heterometallic M
II
2
Dy
III
complexes with M=Cd, Co and Cu. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Thomas Ruppert
- Institute for Inorganic Chemistry (AOC) Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Sören Schlittenhardt
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Nithin Suryadevara
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Olaf Fuhr
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Karlsruhe Nano Micro Facility (KNMFi) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Christopher E. Anson
- Institute for Inorganic Chemistry (AOC) Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
| | - Mario Ruben
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute for Quantum Materials and Technologies (IQMT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Annie K. Powell
- Institute for Inorganic Chemistry (AOC) Karlsruhe Institute of Technology (KIT) Engesserstr. 15 76131 Karlsruhe Germany
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute for Quantum Materials and Technologies (IQMT) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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14
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Sold S, Mummaneni BC, Michenfelder NC, Peng Y, Powell AK, Unterreiner AN, Lefkidis G, Hübner W. Experimental and Theoretical Study of the Ultrafast Dynamics of a Ni 2 Dy 2 -Compound in DMF After UV/Vis Photoexcitation. Chemistry 2022; 11:e202200086. [PMID: 35499181 DOI: 10.1002/open.202200086] [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: 11/10/2022]
Abstract
Invited for this month's cover picture are the groups of Wolfgang Hübner (TU Kaiserslautern, Germany), Annie Powell (Karlsruhe Institut of Technology, Germany), and Andreas-Neil Unterreiner (Karlsruhe Institut of Technology, Germany). The cover picture shows the Dy2 Ni2 -molecular magnet being excited with a UV/Vis laser pulse, together with its time-resolved spectrum after the pulse. The comparison of the theoretical and the experimental spectra together with both the observed and the calculated relaxation times reveal, among others, three key points: the intermediate states participating in the laser-induced dynamics, the partial metal-to-oxygen charge-transfer excitations, and the order of magnitude of the coupling of the molecular magnet to the thermal bath of the environment. Read the full text of their Full Paper at 10.1002/open.202100153.
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Affiliation(s)
- Stefan Sold
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany
| | - Bharadwaj C Mummaneni
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany
| | - Nadine C Michenfelder
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Andreas-Neil Unterreiner
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Georgios Lefkidis
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany.,School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wolfgang Hübner
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany
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15
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Wagner HE, Frank N, Barani E, Anson CE, Bayer L, Powell AK, Fink K, Breher F. Asymmetrically Difunctionalized 1,1′‐Ferrocenyl Metalloligands and Their Transition Metal Complexes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hanna E. Wagner
- Karlsruhe Institute of Technology (KIT) Institute of Inorganic Chemistry Engesserstraße 15 76131 Karlsruhe Germany
| | - Nils Frank
- Karlsruhe Institute of Technology (KIT) Institute of Nanotechnology Postfach 3630 76021 Karlsruhe Germany
| | - Elham Barani
- Karlsruhe Institute of Technology (KIT) Institute of Nanotechnology Postfach 3630 76021 Karlsruhe Germany
| | - Christopher E. Anson
- Karlsruhe Institute of Technology (KIT) Institute of Inorganic Chemistry Engesserstraße 15 76131 Karlsruhe Germany
| | - Lea Bayer
- Karlsruhe Institute of Technology (KIT) Institute of Inorganic Chemistry Engesserstraße 15 76131 Karlsruhe Germany
| | - Annie K. Powell
- Karlsruhe Institute of Technology (KIT) Institute of Inorganic Chemistry Engesserstraße 15 76131 Karlsruhe Germany
| | - Karin Fink
- Karlsruhe Institute of Technology (KIT) Institute of Nanotechnology Postfach 3630 76021 Karlsruhe Germany
| | - Frank Breher
- Karlsruhe Institute of Technology (KIT) Institute of Inorganic Chemistry Engesserstraße 15 76131 Karlsruhe Germany
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16
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Sold S, Mummaneni BC, Michenfelder NC, Peng Y, Powell AK, Unterreiner AN, Lefkidis G, Hübner W. Experimental and Theoretical Study of the Ultrafast Dynamics of a Ni 2 Dy 2 -Compound in DMF After UV/Vis Photoexcitation. ChemistryOpen 2021; 11:e202100153. [PMID: 34931474 PMCID: PMC9059312 DOI: 10.1002/open.202100153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 11/04/2021] [Indexed: 01/30/2023] Open
Abstract
We present a combined experimental and theoretical study of the ultrafast transient absorption spectroscopy results of a {Ni2Dy2}‐compound in DMF, which can be considered as a prototypic molecule for single molecule magnets. We apply state‐of‐the‐art ab initio quantum chemistry to quantitatively describe the optical properties of an inorganic complex system comprising ten atoms to form the chromophoric unit, which is further stabilized by surrounding ligands. Two different basis sets are used for the calculations to specifically identify two dominant peaks in the ground state. Furthermore, we theoretically propagate the compound's correlated many‐body wavefunction under the influence of a laser pulse as well as relaxation processes and compare against the time‐resolved absorption spectra. The experimental data can be described with a time constant of several hundreds of femtoseconds attributed to vibrational relaxation and trapping into states localized within the band gap. A second time constant is ascribed to the excited state while trap states show lifetimes on a longer timescale. The theoretical propagation is performed with the density‐matrix formalism and the Lindblad superoperator, which couples the system to a thermal bath, allowing us to extract relaxation times from first principles.
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Affiliation(s)
- S Sold
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany
| | - B C Mummaneni
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany
| | - N C Michenfelder
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Y Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - A K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - A-N Unterreiner
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - G Lefkidis
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany.,School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an, 710072, China
| | - W Hübner
- Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany
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17
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Venu AC, Nasser Din R, Rudszuck T, Picchetti P, Chakraborty P, Powell AK, Krämer S, Guthausen G, Ibrahim M. NMR Relaxivities of Paramagnetic Lanthanide-Containing Polyoxometalates. Molecules 2021; 26:7481. [PMID: 34946561 PMCID: PMC8703889 DOI: 10.3390/molecules26247481] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/02/2021] [Accepted: 12/03/2021] [Indexed: 11/16/2022] Open
Abstract
The current trend for ultra-high-field magnetic resonance imaging (MRI) technologies opens up new routes in clinical diagnostic imaging as well as in material imaging applications. MRI selectivity is further improved by using contrast agents (CAs), which enhance the image contrast and improve specificity by the paramagnetic relaxation enhancement (PRE) mechanism. Generally, the efficacy of a CA at a given magnetic field is measured by its longitudinal and transverse relaxivities r1 and r2, i.e., the longitudinal and transverse relaxation rates T1-1 and T2-1 normalized to CA concentration. However, even though basic NMR sensitivity and resolution become better in stronger fields, r1 of classic CA generally decreases, which often causes a reduction of the image contrast. In this regard, there is a growing interest in the development of new contrast agents that would be suitable to work at higher magnetic fields. One of the strategies to increase imaging contrast at high magnetic field is to inspect other paramagnetic ions than the commonly used Gd(III)-based CAs. For lanthanides, the magnetic moment can be higher than that of the isotropic Gd(III) ion. In addition, the symmetry of electronic ground state influences the PRE properties of a compound apart from diverse correlation times. In this work, PRE of water 1H has been investigated over a wide range of magnetic fields for aqueous solutions of the lanthanide containing polyoxometalates [DyIII(H2O)4GeW11O39]5- (Dy-W11), [ErIII(H2O)3GeW11O39]5- (Er-W11) and [{ErIII(H2O)(CH3COO)(P2W17O61)}2]16- (Er2-W34) over a wide range of frequencies from 20 MHz to 1.4 GHz. Their relaxivities r1 and r2 increase with increasing applied fields. These results indicate that the three chosen POM systems are potential candidates for contrast agents, especially at high magnetic fields.
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Affiliation(s)
- Aiswarya Chalikunnath Venu
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (A.C.V.); (P.P.); (P.C.)
| | - Rami Nasser Din
- LNCMI-EMFL, CNRS, INSA-T and UPS, Université Grenoble Alpes, Boîte Postale 166, CEDEX 9, 38042 Grenoble, France;
| | - Thomas Rudszuck
- Karlsruhe Institute of Technology (KIT), MVM-VM, Adenauerring 20b, 76131 Karlsruhe, Germany;
| | - Pierre Picchetti
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (A.C.V.); (P.P.); (P.C.)
| | - Papri Chakraborty
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (A.C.V.); (P.P.); (P.C.)
| | - Annie K. Powell
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (A.C.V.); (P.P.); (P.C.)
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Steffen Krämer
- LNCMI-EMFL, CNRS, INSA-T and UPS, Université Grenoble Alpes, Boîte Postale 166, CEDEX 9, 38042 Grenoble, France;
| | - Gisela Guthausen
- Karlsruhe Institute of Technology (KIT), MVM-VM, Adenauerring 20b, 76131 Karlsruhe, Germany;
- Karlsruhe Institute of Technology (KIT), EBI-WCWT, Adenauerring 20b, 76131 Karlsruhe, Germany
| | - Masooma Ibrahim
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (A.C.V.); (P.P.); (P.C.)
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18
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Tombers M, Meyer J, Meyer J, Lawicki A, Zamudio-Bayer V, Hirsch K, Lau JT, von Issendorff B, Terasaki A, Schlathölter TA, Hoekstra RA, Schmidt S, Powell AK, Kessler E, Prosenc MH, van Wüllen C, Niedner-Schatteburg G. Mn 12 -Acetate Complexes Studied as Single Molecules. Chemistry 2021; 28:e202102592. [PMID: 34806228 PMCID: PMC9299852 DOI: 10.1002/chem.202102592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Indexed: 11/16/2022]
Abstract
The phenomenon of single molecule magnet (SMM) behavior of mixed valent Mn12 coordination clusters of general formula [MnIII8MnIV4O12(RCOO)16(H2O)4] had been exemplified by bulk samples of the archetypal [MnIII8MnIV4O12(CH3COO)16(H2O)4] (4) molecule, and the molecular origin of the observed magnetic behavior has found support from extensive studies on the Mn12 system within crystalline material or on molecules attached to a variety of surfaces. Here we report the magnetic signature of the isolated cationic species [Mn12O12(CH3COO)15(CH3CN)]+(1) by gas phase X‐ray Magnetic Circular Dichroism (XMCD) spectroscopy, and we find it closely resembling that of the corresponding bulk samples. Furthermore, we report broken symmetry DFT calculations of spin densities and single ion tensors of the isolated, optimized complexes [Mn12O12(CH3COO)15(CH3CN)]+(1), [Mn12O12(CH3COO)16] (2), [Mn12O12(CH3COO)16(H2O)4] (3), and the complex in bulk geometry [MnIII8MnIV4O12(CH3COO)16(H2O)4] (5). The found magnetic fingerprints – experiment and theory alike – are of a remarkable robustness: The MnIV4 core bears almost no magnetic anisotropy while the surrounding MnIII8 ring is highly anisotropic. These signatures are truly intrinsic properties of the Mn12 core scaffold within all of these complexes and largely void of the environment. This likely holds irrespective of bulk packing effects.
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Affiliation(s)
- Matthias Tombers
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
| | - Jennifer Meyer
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
| | - Jonathan Meyer
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
| | - Arkadiusz Lawicki
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz Zentrum Berlin für Materialien und Energie, 12489, Berlin-Adlershof, Germany
| | - Vicente Zamudio-Bayer
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz Zentrum Berlin für Materialien und Energie, 12489, Berlin-Adlershof, Germany
| | - Konstantin Hirsch
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz Zentrum Berlin für Materialien und Energie, 12489, Berlin-Adlershof, Germany
| | - J Tobias Lau
- Abteilung für Hochempfindliche Röntgenspektroskopie, Helmholtz Zentrum Berlin für Materialien und Energie, 12489, Berlin-Adlershof, Germany.,Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, 79104, Freiburg, Germany
| | - Bernd von Issendorff
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, 79104, Freiburg, Germany
| | - Akira Terasaki
- Department of Chemistry, Kyushu University, Fukuoka, 819-0395, Japan
| | - Thomas A Schlathölter
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands
| | - Ronnie A Hoekstra
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands
| | - Sebastian Schmidt
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
| | - Annie K Powell
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
| | - Eva Kessler
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
| | - Marc H Prosenc
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
| | - Christoph van Wüllen
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663, Kaiserslautern, Germany
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19
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Peng Y, Kaemmerer H, Powell AK. Frontispiece: From the {Fe
III
2
Ln
2
} Butterfly's Perspective: the Magnetic Benefits and Challenges of Cooperativity within 3 d–4 f Based Coordination Clusters. Chemistry 2021. [DOI: 10.1002/chem.202186162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
- Institute for Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- School of Chemistry and Chemical Engineering Jiangxi University of Science and Technology Ganzhou 341000 P.R. China
| | - Hagen Kaemmerer
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
- Institute for Quantum Materials and Technologies (IQMT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
- Institute for Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute for Quantum Materials and Technologies (IQMT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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20
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Goura J, Bassil BS, Ma X, Rajan A, Moreno‐Pineda E, Schnack J, Ibrahim M, Powell AK, Ruben M, Wang J, Ruhlmann L, Kortz U. Ni II 36 -Containing 54-Tungsto-6-Silicate: Synthesis, Structure, Magnetic and Electrochemical Studies. Chemistry 2021; 27:15080-15084. [PMID: 34416050 PMCID: PMC8596682 DOI: 10.1002/chem.202102973] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Indexed: 11/23/2022]
Abstract
The 36-NiII -containing 54-tungsto-6-silicate, [Ni36 (OH)18 (H2 O)36 (SiW9 O34 )6 ]6- (Ni36 ) was synthesized by a simple one-pot reaction of the Ni2 -pivalate complex [Ni2 (μ-OH2 )(O2 CCMe3 )4 (HO2 CCMe3 )4 ] with the trilacunary [SiW9 O34 ]10- polyanion precursor in water and structurally characterized by a multitude of physicochemical techniques including single-crystal XRD, FTIR, TGA, elemental analysis, magnetic and electrochemical studies. Polyanion Ni36 comprises six equivalent {NiII 6 SiW9 } units which are linked by Ni-O-W bridges forming a macrocyclic assembly. Magnetic studies demonstrate that the {Ni6 } building blocks in Ni36 remain magnetically intact while forming a hexagonal ring with antiferromagnetic exchange interactions between adjacent {Ni6 } units. Electrochemical studies indicate that the first reduction is reversible and associated with the WVI/V couple, whereas the second reduction is irreversible attributed to the NiII/0 couple.
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Affiliation(s)
- Joydeb Goura
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
| | - Bassem S. Bassil
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
- Department of ChemistryFaculty of Arts and SciencesUniversity of BalamandTripoliLebanon
| | - Xiang Ma
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
| | - Ananthu Rajan
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
| | - Eufemio Moreno‐Pineda
- Departamento de Química-FísicaEscuela de QuímicaFacultad de Ciencias NaturalesExactas y TecnologíaUniversidad de PanamáPanamá
- Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)76344Eggenstein-LeopoldshafenGermany
| | - Jürgen Schnack
- Faculty of PhysicsBielefeld UniversityP.O. Box 10013133501BielefeldGermany
| | - Masooma Ibrahim
- Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)76344Eggenstein-LeopoldshafenGermany
| | - Annie K. Powell
- Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)76344Eggenstein-LeopoldshafenGermany
- Institute of Inorganic ChemistryKarlsruhe Institute of Technology (KIT)Engesserstrasse 1576131KarlsruheGermany
| | - Mario Ruben
- Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)76344Eggenstein-LeopoldshafenGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Centre Européen de Sciences Quantiques (CESQ)Institut de Science et d'Ingénierie Supramoléculaire (ISIS)8, Allée Gaspard Monge67000StrasbourgFrance
| | - Jingjing Wang
- Laboratoire d'Electrochimie et de Chimie Physique du Corps SolideUniversité de StrasbourgInstitut de Chimie UMR CNRS 71774 rue Blaise PascalCS 90032, 67081Strasbourg cedexFrance
| | - Laurent Ruhlmann
- Laboratoire d'Electrochimie et de Chimie Physique du Corps SolideUniversité de StrasbourgInstitut de Chimie UMR CNRS 71774 rue Blaise PascalCS 90032, 67081Strasbourg cedexFrance
| | - Ulrich Kortz
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
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Baniodeh A, Wagner D, Peng Y, Kaemmerer H, Leblanc N, Bräse S, Naubron J, Anson CE, Powell AK. Breaking Symmetry Relaxes Structural and Magnetic Restraints, Suppressing QTM in Enantiopure Butterfly Fe 2 Dy 2 SMMs*. Chemistry 2021; 27:15102-15108. [PMID: 34617631 PMCID: PMC8596739 DOI: 10.1002/chem.202103360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Indexed: 11/12/2022]
Abstract
The {Fe2 Dy2 } butterfly systems can show single molecule magnet (SMM) behaviour, the nature of which depends on details of the electronic structure, as previously demonstrated for the [Fe2 Dy2 (μ3 -OH)2 (Me-teaH)2 (O2 CPh)6 ] compound, where the [N,N-bis-(2-hydroxyethyl)-amino]-2-propanol (Me-teaH3 ) ligand is usually used in its racemic form. Here, we describe the consequences for the SMM properties by using enantiopure versions of this ligand and present the first homochiral 3d/4 f SMM, which could only be obtained for the S enantiomer of the ligand for [Fe2 Dy2 (μ3 -OH)2 (Me-teaH)2 (O2 CPh)6 ] since the R enantiomer underwent significant racemisation. To investigate this further, we prepared the [Fe2 Dy2 (μ3 -OH)2 (Me-teaH)2 (O2 CPh)4 (NO3 )2 ] version, which could be obtained as the RS-, R- and S-compounds. Remarkably, the enantiopure versions show enhanced slow relaxation of magnetisation. The use of the enantiomerically pure ligand suppresses QTM, leading to the conclusion that use of enantiopure ligands is a "gamechanger" by breaking the cluster symmetry and altering the intimate details of the coordination cluster's molecular structure.
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Affiliation(s)
- Amer Baniodeh
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute for Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Danny Wagner
- Institute of Organic ChemistryKarlsruhe Institute of TechnologyFritz-Haber-Weg 676131KarlsruheGermany
| | - Yan Peng
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute for Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Hagen Kaemmerer
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Nicolas Leblanc
- Institute for Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Stefan Bräse
- Institute of Organic ChemistryKarlsruhe Institute of TechnologyFritz-Haber-Weg 676131KarlsruheGermany
- Institute of Biological and Chemical Systems (IBCS-FMS)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | | | - Christopher E. Anson
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute for Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
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Pfleger RF, Schlittenhardt S, Merkel MP, Ruben M, Fink K, Anson CE, Bendix J, Powell AK. Frontispiece: Terminal Ligand and Packing Effects on Slow Relaxation in an Isostructural Set of [Dy(H
2
dapp)X
2
]
+
Single Molecule Magnets. Chemistry 2021. [DOI: 10.1002/chem.202186163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rouven F. Pfleger
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstraße 15 76131 Karlsruhe Germany
| | - Sören Schlittenhardt
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Marcel P. Merkel
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Mario Ruben
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS, UMR 7006) CNRS-Université de Strasbourg 8 allée Gaspard Monge, BP 70028 67083 Strasbourg Cedex France
| | - Karin Fink
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstraße 15 76131 Karlsruhe Germany
| | - Jesper Bendix
- Department of Chemistry University of Copenhagen Universitetparken 5 2100 Copenhagen Denmark
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstraße 15 76131 Karlsruhe Germany
- Institute of Nanotechnology (INT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute for Quantum Materials and Technologies (IQMT) Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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Kaemmerer H, Mereacre V, Ako AM, Mameri S, Anson CE, Clérac R, Powell AK. Assisted Self-Assembly to Target Heterometallic Mn-Nd and Mn-Sm SMMs: Synthesis and Magnetic Characterisation of [Mn 7 Ln 3 (O) 4 (OH) 4 (mdea) 3 (piv) 9 (NO 3 ) 3 ] (Ln=Nd, Sm, Eu, Gd)*. Chemistry 2021; 27:15095-15101. [PMID: 34554613 PMCID: PMC8596590 DOI: 10.1002/chem.202102912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Indexed: 11/10/2022]
Abstract
In an assisted self-assembly approach starting from the [Mn6 O2 (piv)10 (4-Me-py)2 (pivH)2 ] cluster a family of Mn-Ln compounds (Ln=Pr-Yb) was synthesised. The reaction of [Mn6 O2 (piv)10 (4-Me-py)2 (pivH)2 ] (1) with N-methyldiethanolamine (mdeaH2 ) and Ln(NO3 )3 ⋅ 6H2 O in MeCN generally yields two main structure types: for Ln=Tb-Yb a previously reported Mn5 Ln4 motif is obtained, whereas for Ln=Pr-Eu a series of Mn7 Ln3 clusters is obtained. Within this series the GdIII analogue represents a special case because it shows both structural types as well as a third Mn2 Ln2 inverse butterfly motif. Variation in reaction conditions allows access to different structure types across the whole series. This prompts further studies into the reaction mechanism of this cluster assisted self-assembly approach. For the Mn7 Ln3 analogues reported here variable-temperature magnetic susceptibility measurements suggest that antiferromagnetic interactions between the spin carriers are dominant. Compounds incorporating Ln=NdIII (2), SmIII (3) and GdIII (5) display SMM behaviour. The slow relaxation of the magnetisation for these compounds was confirmed by ac measurements above 1.8 K.
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Affiliation(s)
- Hagen Kaemmerer
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Valeriu Mereacre
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Ayuk M. Ako
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Samir Mameri
- Université de StrasbourgIUT Robert SchumanCS 10315, 67411Illkirch CedexFrance
| | - Christopher E. Anson
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Rodolphe Clérac
- Univ. Bordeaux CNRS, Centre de Recherche Paul Pascal UMR 503133600PessacFrance
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Institute for Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
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24
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Pfleger RF, Schlittenhardt S, Merkel MP, Ruben M, Fink K, Anson CE, Bendix J, Powell AK. Terminal Ligand and Packing Effects on Slow Relaxation in an Isostructural Set of [Dy(H 2 dapp)X 2 ] + Single Molecule Magnets*. Chemistry 2021; 27:15085-15094. [PMID: 34597423 PMCID: PMC8596592 DOI: 10.1002/chem.202102918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Indexed: 11/11/2022]
Abstract
We report three structurally related single ion Dy compounds using the pentadentate ligand 2,6-bis((E)-1-(2-(pyridin-2-yl)-hydrazineylidene)ethyl)pyridine (H2 dapp) [Dy(H2 dapp)(NO3 )2 ]NO3 (1), [Dy(H2 dapp)(OAc)2 ]Cl (2) and [Dy(H2 dapp)(NO3 )2 ]Cl0.92 (NO3 )0.08 (3). The (H2 dapp) occupies a helical twisted pentagonal equatorial arrangement with two anionic ligands in the axial positions. Further influence on the electronic and magnetic structure is provided by a closely associated counterion interacting with the central N-H group of the (H2 dapp). The slow relaxation of the magnetisation shows that the anionic acetates give the greatest slowing down of the magnetisation reversal. Further influence on the relaxation properties of compounds1 and 2 is the presence of short nitrate-nitrate intermolecular ligand contact opening further lattice relaxation pathways.
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Affiliation(s)
- Rouven F. Pfleger
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstraße 1576131KarlsruheGermany
| | - Sören Schlittenhardt
- Institute of Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Marcel P. Merkel
- Institute of Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Mario Ruben
- Institute of Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS, UMR 7006)CNRS-Université de Strasbourg8 allée Gaspard Monge, BP 7002867083Strasbourg CedexFrance
| | - Karin Fink
- Institute of Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Christopher E. Anson
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstraße 1576131KarlsruheGermany
| | - Jesper Bendix
- Department of ChemistryUniversity of CopenhagenUniversitetparken 52100CopenhagenDenmark
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstraße 1576131KarlsruheGermany
- Institute of Nanotechnology (INT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
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25
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Peng Y, Kaemmerer H, Powell AK. From the {Fe III 2 Ln 2 } Butterfly's Perspective: the Magnetic Benefits and Challenges of Cooperativity within 3 d-4 f Based Coordination Clusters. Chemistry 2021; 27:15043-15065. [PMID: 34582064 PMCID: PMC8597143 DOI: 10.1002/chem.202102962] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Indexed: 11/19/2022]
Abstract
In this Review we discuss the tuning handles which can be used to steer the magnetic properties of FeIII‐4 f “butterfly” compounds. The majority of presented compounds were produced in the context of project A3 “Di‐ to tetranuclear compounds incorporating highly anisotropic paramagnetic metal ions” within the SFB/TRR88 “3MET”. These contain {FeIII2Ln2} cores encapsulated in ligand shells which are easy to tune in a “test‐bed” system. We identify the following advantages and variables in such systems: (i) the complexes are structurally simple usually with one crystallographically independent FeIII and LnIII, respectively. This simplifies theory and anaylsis; (ii) choosing Fe allows 57Fe Mössbauer spectroscopy to be used as an additional technique which can give information about oxidation levels and spin states, local moments at the iron nuclei and spin‐relaxation and, more importantly, about the anisotropy not only of the studied isotope, but also of elements interacting with this isotope; (iii) isostructural analogues with all the available (i. e. not Pm) 4 f ions can be synthesised, enabling a systematic survey of the influence of the 4 f ion on the electronic structure; (iv) this cluster type is obtained by reacting [FeIII3O(O2CR)6(L)3](X) (X=anion, L=solvent such as H2O, py) with an ethanolamine‐based ligand L′ and lanthanide salts. This allows to study analogues of [FeIII2Ln2(μ3‐OH)2(L′)2(O2CR)6] using the appropriate iron trinuclear starting materials. (v) the organic main ligand can be readily functionalised, facilitating a systematic investigation of the effect of organic substituents on the ligands on the magnetic properties of the complexes. We describe and discuss 34 {MIII2Ln2} (M=Fe or in one case Al) butterfly compounds which have been reported up to 2020. The analysis of these gives perspectives for designing new SMM systems with specific electronic and magnetic signatures
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Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131, Karlsruhe, Germany.,Institute for Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P.R. China
| | - Hagen Kaemmerer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131, Karlsruhe, Germany.,Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131, Karlsruhe, Germany.,Institute for Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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26
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Khan A, Akhtar MN, Lan Y, Anson CE, Powell AK. Linear shaped hetero-metallic [Zn2Ln4] clusters with Schiff base ligand: Synthesis, characterization and magnetic properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120437] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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28
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Peewasan K, Merkel MP, Fuhr O, Anson CE, Powell AK. A multifunctional use of bis(methylene)bis(5-bromo-2-hydroxyl salicyloylhydrazone): from metal sensing to ambient catalysis of A3 coupling reactions. RSC Adv 2020; 10:40739-40744. [PMID: 35519231 PMCID: PMC9057725 DOI: 10.1039/d0ra07687b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 10/20/2020] [Indexed: 11/21/2022] Open
Abstract
The potential use of bis(methylene)bis(5-bromo-2-hydroxylsalicyloylhydrazone) as a multifunctional fluorescence sensor for Cu2+, Ni2+, Co2+ and Fe2+ ions was investigated. The optical behaviour shows an increase in an absorption band at 408 nm which can be ascribed to the d-d transition (UV-vis) of the metal ions and a concomitant decrease in fluorescence intensity at 507 nm. The crystallographic analysis shows the binding site of the sensor to two Cu2+ ions and confirms the stoichiometry of 1 : 2 (ligand to metal) which is in good agreement with a Job plot analysis. Furthermore the Cu2+-complex catalyses A3 coupling reactions at 1 mol% catalytic loading; chiral propargylamine derivatives were obtained in high yield after 24 h reaction time under ambient conditions.
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Affiliation(s)
- Krisana Peewasan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany
| | - Marcel P Merkel
- Institute of Nanotechnology, Karlsruhe Institute of Technology Campus North Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Karlsruhe Germany
| | - Olaf Fuhr
- Institute of Nanotechnology, Karlsruhe Institute of Technology Campus North Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Karlsruhe Germany.,Karlsruhe Nano Micro Facility Karlsruhe Institute of Technolog Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology Engesserstrasse 15 76131 Karlsruhe Germany .,Institute of Nanotechnology, Karlsruhe Institute of Technology Campus North Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Karlsruhe Germany
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29
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Pandit NR, Bej S, Mondal A, Ghosh M, Kostakis GE, Powell AK, Banerjee P, Biswas B. Exploratory studies on azido-bridged complexes (Ni 2+ and Mn 2+) as dual colourimetric chemosensors for S 2- and Ag +: combined experimental and theoretical outcomes with real field applications. Dalton Trans 2020; 49:13090-13099. [PMID: 32929443 DOI: 10.1039/d0dt02846k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report two isostructural dinuclear transition metal complexes [M2(HL)2(N3)4], where M = Ni2+ (BS-1), Mn2+ (BS-2), and HL is (2-methyl-2-((pyridin-2-ylmethyl)amino)propan-1-ol) and investigate them as molecular sensors towards hazardous entities. BS-1 shows high selectivity towards the S2- and Ag+ ions, easily observed by the naked eye colour change and its detection limit in aqueous solutions for the S2- ion was calculated as 0.55 μM with a binding constant of 3.28 × 105 M-1, while the limit for the Ag+ ion is 21.8 μM. Notably, BS-2 shows good selectivity towards the Ag+ ion with a detection limit of 10.84 μM. Spectroscopic and DFT studies shed light on the mechanistic course of interaction between the host and guest entities, suggesting a sulphide-mediated reduction of the azide mechanism. In a nutshell, these simple transition metal complexes were exploited for discriminately detecting hazardous analytes with real field applications in analytical science (via. "Dip-Stick" approach) as well as engineering science, which provides a significant contribution in the recent advancement of supramolecular chemistry.
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Affiliation(s)
- Nithun Ranjan Pandit
- Department of Chemistry, Presidency University, 86/1, College Street, Kolkata 700073, India.
| | - Sourav Bej
- Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, India. and Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad - 201002, Uttar Pradesh, India
| | - Ananya Mondal
- Department of Chemistry, Presidency University, 86/1, College Street, Kolkata 700073, India. and Vidyasagar College for Women, 39 Sankar Ghosh Lane, Kolkata, 6, West Bengal, India
| | - Meenakshi Ghosh
- Vidyasagar College for Women, 39 Sankar Ghosh Lane, Kolkata, 6, West Bengal, India
| | | | - Annie K Powell
- InstitutfürAnorganischeChemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, D-76131 Karlsruhe, Germany
| | - Priyabrata Banerjee
- Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, India. and Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad - 201002, Uttar Pradesh, India
| | - Biplab Biswas
- Department of Chemistry, Presidency University, 86/1, College Street, Kolkata 700073, India.
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30
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Busch R, Carter AB, Konidaris KF, Kühne IA, González R, Anson CE, Powell AK. The First Use of a ReX 5 Synthon to Modulate Fe III Spin Crossover via Supramolecular Halogen⋅⋅⋅Halogen Interactions. Chemistry 2020; 26:11835-11840. [PMID: 32267564 PMCID: PMC7540276 DOI: 10.1002/chem.202001668] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Indexed: 11/08/2022]
Abstract
We have added the {ReIV X5 }- (X=Br, Cl) synthon to a pocket-based ligand to provide supramolecular design using halogen⋅⋅⋅halogen interactions within an FeIII system that has the potential to undergo spin crossover (SCO). By removing the solvent from the crystal lattice, we "switch on" halogen⋅⋅⋅halogen interactions between neighboring molecules, providing a supramolecular cooperative pathway for SCO. Furthermore, changes to the halogen-based interaction allow us to modify the temperature and nature of the SCO event.
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Affiliation(s)
- Rebecca Busch
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 1576131KarlsruheGermany
| | - Anthony B. Carter
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 1576131KarlsruheGermany
- School of ChemistryUniversity of SouthamptonUniversity RoadSouthamptonSO17 1BJUK
| | - Konstantis F. Konidaris
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 1576131KarlsruheGermany
- Department of PharmacyUniversity of Patras26504PatrasGreece
| | - Irina A. Kühne
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 1576131KarlsruheGermany
- School of PhysicsUniversity College Dublin (UCD)BelfieldDublin4Ireland
| | - Ricardo González
- Cátedra de Química InorgánicaDepartamento Estrella CamposFacultadde QuímicaUniversidad de la RepúblicaAvda. General Flores 2124CC 1157MontevideoUruguay
| | - Christopher E. Anson
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 1576131KarlsruheGermany
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstrasse 1576131KarlsruheGermany
- Institute of NanotechnologyKarlsruhe Institute of TechnologyHermann von Helmholtz Platz 176344Eggenstein-LeopoldshafenGermany
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Kaemmerer H, Baniodeh A, Peng Y, Moreno-Pineda E, Schulze M, Anson CE, Wernsdorfer W, Schnack J, Powell AK. Inorganic Approach to Stabilizing Nanoscale Toroidicity in a Tetraicosanuclear Fe 18Dy 6 Single Molecule Magnet. J Am Chem Soc 2020; 142:14838-14842. [PMID: 32786752 DOI: 10.1021/jacs.0c07168] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cyclic coordination clusters (CCCs) are proving to provide an extra dimension in terms of exotic magnetic behavior as a result of their finite but cyclized chain structures. The Fe18Dy6 CCC is a Single Molecule Magnet with the highest nuclearity among Ln containing clusters. The three isostructural compounds [Fe18Ln6(μ-OH)6(ampd)12(Hampd)12(PhCO2)24](NO3)6·38MeCN for Ln = DyIII (1), LuIII (2), or YIII (3), where H2ampd = 2-amino-2-methyl-1,3-propanediol, are reported. These can be described in terms of the cyclization of six {Fe3Ln(μOH)(ampd)2(Hampd)2(PhCO2)4}+ units with six nitrate counterions to give the neutral cluster. The overall structure consists of two giant Dy3 triangles sandwiching a strongly antiferromagnetically coupled Fe18 ring, leading to a toroidal arrangement of the anisotropy axis of the Dy ions, making this the biggest toroidal arrangement on a molecular level known so far.
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Affiliation(s)
- Hagen Kaemmerer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Amer Baniodeh
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Eufemio Moreno-Pineda
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Depto. de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá, Panamá
| | - Michael Schulze
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Wolfgang Wernsdorfer
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany.,Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Jürgen Schnack
- Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Kühne IA, Anson CE, Powell AK. The Influence of Halide Substituents on the Structural and Magnetic Properties of Fe6Dy3 Rings. Front Chem 2020; 8:701. [PMID: 32923426 PMCID: PMC7456939 DOI: 10.3389/fchem.2020.00701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/07/2020] [Indexed: 11/13/2022] Open
Abstract
We report the synthesis and magnetic properties of three new nine-membered Fe(III)-Dy(III) cyclic coordination clusters (CCCs), with a core motif of [Fe6Dy3(μ-OMe)9(vanox)6(X-benz)6] where the benzoate ligands are substituted in the para-position with X = F (1), Cl (2), Br (3). Single crystal X-ray diffraction structure analyses show that for the smaller fluorine or chlorine substituents the resulting structures exhibit an isostructural Fe6Dy3 core, whilst the 4-bromobenzoate ligand leads to structural distortions which affect the dynamic magnetic behavior. The magnetic susceptibility and magnetization of 1-3 were investigated and show similar behavior in the dc (direct current) magnetic data. Additional ac (alternating current) magnetic measurements show that all compounds exhibit frequency-dependent and temperature-dependent signals in the in-phase and out-of-phase component of the susceptibility and can therefore be described as field-induced SMMs. The fluoro-substituted benzoate cluster 1 shows a magnetic behavior closely similar to that of the corresponding unsubstituted Fe6Dy3 cluster, with Ueff = 21.3 K within the Orbach process. By increasing the size of the substituent toward 4-chlorobenzoate within 2, an increase of the energy barrier to Ueff = 36.1 K was observed. While the energy barrier becomes higher from 1 to 2, highlighting that the introduction of different substituents on the benzoate ligand in the para-position has an impact on the magnetic properties, cluster 3 shows a significantly different SMM behavior where Ueff is reduced in the Orbach regime to only 4.9 K.
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Affiliation(s)
- Irina A. Kühne
- Institut für Anorganische Chemie, KIT (Karlsruhe Institute of Technology), Karlsruhe, Germany
- School of Physics, University College Dublin (UCD), Dublin, Ireland
| | - Christopher E. Anson
- Institut für Anorganische Chemie, KIT (Karlsruhe Institute of Technology), Karlsruhe, Germany
| | - Annie K. Powell
- Institut für Anorganische Chemie, KIT (Karlsruhe Institute of Technology), Karlsruhe, Germany
- Institut für Nanotechnologie, KIT (Karlsruhe Institute of Technology), Eggenstein-Leopoldshafen, Germany
- *Correspondence: Annie K. Powell
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Hahn P, Ullmann S, Klose J, Peng Y, Powell AK, Kersting B. Dinuclear Tb and Dy complexes supported by hybrid Schiff-base/calixarene ligands: synthesis, structures and magnetic properties. Dalton Trans 2020; 49:10901-10908. [PMID: 32720658 DOI: 10.1039/d0dt02209h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of the new lanthanide complexes [HNEt3][Dy2(HL1)(L1)] (5), and [Ln2(L2)2] (Ln = TbIII (7), DyIII (8)) supported by the hybrid Schiff-base/calix[4]arene ligands H4L1 (25-[2-((2-methylphenol)imino)ethoxy]-26,27,28-trihydroxy-calix[4]arene) and H3L2 (25-[2-((2-methylpyridine)imino)ethoxy]-26,27,28-trihydroxy-calix[4]arene) are reported. Spectroscopic data (for 5) and X-ray crystallographic analysis (for 7·4MeCN, 8·4MeCN) reveal the presence of dimeric structures, featuring doubly-bridged NO4Ln(μ-O)2LnO4N (5) or N2O3Ln(μ-O)2LnO3N2 cores (7, 8) with seven-coordinated Ln3+ ions. The magnetic properties of polycrystalline samples of 5, 7 and 8 were studied by variable temperature dc and ac magnetic susceptibility measurements. The χ''(T) vs. T plots show no maxima in zero field, but the maxima can be detected under a 3 kOe dc field. The relaxation times τ obey the Arrhenius law above 5 K. Anisotropy barriers of ∼18 cm-1 (26 K) for 5 and ∼23 cm-1 (33 K) for 8 were determined.
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Affiliation(s)
- Peter Hahn
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Steve Ullmann
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Jennifer Klose
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany.
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany.
| | - Berthold Kersting
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
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Rinck J, Kitchen JA, Carter AB, Lan Y, Anson CE, Fink K, Brooker S, Powell AK. Di- and Tri-nuclear VIII and CrIII Complexes of Dipyridyltriazoles: Ligand Rearrangements, Mixed Valency and Ferromagnetic Coupling. Front Chem 2020; 8:540. [PMID: 32733848 PMCID: PMC7363982 DOI: 10.3389/fchem.2020.00540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 05/26/2020] [Indexed: 11/13/2022] Open
Abstract
The first dinuclear and trinuclear chromium(III) and dinuclear vanadium(III) complexes of N4-R-substituted-3,5-di(2-pyridyl)-1,2,4-triazole (Rdpt) ligands have been prepared by solvothermal complexations under inert atmospheres, and characterized. The reactions of CrIII and VIII with adpt (R = amino) resulted in deamination of the ligand and yielded the dinuclear doubly-triazolate bridged complexes [V2III(dpt−)2Cl4] (1) and [Cr2III(dpt−)2Cl4] (2). In the case of the CrIII complex 2 this bridging results in a rare example of ferromagnetic coupling for a dinuclear CrIII compound. DFT studies confirm that in 2 the ferromagnetic coupling pathways dominate over the antiferromagnetic pathways, whereas in 1 the reverse occurs, consistent with the observed overall antiferromagnetic coupling in that case. It was also found that the use of different additives in the reaction allows the nuclearity of the CrIII product to be manipulated, giving either the dinuclear system, or the first example of a trinuclear circular helicate for a Rdpt complex, [Cr3III(dpt)3Cl6]·1¾MeCN·¼DCM (3). Reaction of N4-pydpt (R = 4-pyridyl) with VIII led to an unusual shift of the pyridyl substituent from N4 to N1 of the triazole, forming the ligand isomer N1-pydpt, and giving a dinuclear doubly-triazole bridged complex, [V2III(N1-pydpt)2Cl6]·2MeCN (4). Reaction with CrIII results in loss of the 4-pyridyl ring and a mixture of the di- and trinuclear complexes, 2 and 3. Interestingly, partial oxidation of the VIII in dinuclear complex 4 to vanadyl VIV=O was identified by crystallographic analysis of partially oxidized single crystals, [(VIVO)0.84(VIII)1.16(N1-pydpt)2Cl5.16]·0.84H2O·1.16MeCN (5).
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Affiliation(s)
- Julia Rinck
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, Dunedin, New Zealand
| | - Jonathan A. Kitchen
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, Dunedin, New Zealand
- Chemistry, School of Natural and Computational Sciences, Massey University, Auckland, New Zealand
| | - Anthony B. Carter
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Yanhua Lan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
- *Correspondence: Karin Fink
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, Dunedin, New Zealand
- Sally Brooker
| | - Annie K. Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
- Annie K. Powell
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Scherthan L, Pfleger RF, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Alp EE, Anson CE, Diller R, Powell AK, Schünemann V. Frontispiz: Untersuchung von Schwingungen in Bezug auf Spin‐Phonon‐Kopplung in Einzelmolekülmagneten mittels nuklearer inelastischer Streuung am
161
Dy‐Kern. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202082361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lena Scherthan
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Rouven F. Pfleger
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
| | - Hendrik Auerbach
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Tim Hochdörffer
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Juliusz A. Wolny
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Wenli Bi
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Physics University of Alabama at Birmingham Birmingham AL 35294 USA
| | - Jiyong Zhao
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
| | - Rolf Diller
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
- Institute of Nanotechnology Karlsruhe Institute of Technology 76021 Karlsruhe Deutschland
| | - Volker Schünemann
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
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Scherthan L, Pfleger RF, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Alp EE, Anson CE, Diller R, Powell AK, Schünemann V. Exploring the Vibrational Side of Spin-Phonon Coupling in Single-Molecule Magnets via 161 Dy Nuclear Resonance Vibrational Spectroscopy. Angew Chem Int Ed Engl 2020; 59:8818-8822. [PMID: 32181552 PMCID: PMC7317570 DOI: 10.1002/anie.201914728] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/14/2020] [Indexed: 11/06/2022]
Abstract
Synchrotron-based nuclear resonance vibrational spectroscopy (NRVS) using the Mössbauer isotope 161 Dy has been employed for the first time to study the vibrational properties of a single-molecule magnet (SMM) incorporating DyIII , namely [Dy(Cy3 PO)2 (H2 O)5 ]Br3 ⋅2 (Cy3 PO)⋅2 H2 O ⋅2 EtOH. The experimental partial phonon density of states (pDOS), which includes all vibrational modes involving a displacement of the DyIII ion, was reproduced by means of simulations using density functional theory (DFT), enabling the assignment of all intramolecular vibrational modes. This study proves that 161 Dy NRVS is a powerful experimental tool with significant potential to help to clarify the role of phonons in SMMs.
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Affiliation(s)
- Lena Scherthan
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Rouven F. Pfleger
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Hendrik Auerbach
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Tim Hochdörffer
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Juliusz A. Wolny
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Wenli Bi
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
- Department of PhysicsUniversity of Alabama at BirminghamBirminghamAL35294USA
| | - Jiyong Zhao
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
| | - Michael Y. Hu
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
| | - E. Ercan Alp
- Advanced Photon SourceArgonne National Laboratory9700 South Cass AvenueArgonneIL60439USA
| | - Christopher E. Anson
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
| | - Rolf Diller
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of TechnologyEngesserstr. 1576131KarlsruheGermany
- Institute of NanotechnologyKarlsruhe Institute of Technology76021KarlsruheGermany
| | - Volker Schünemann
- Department of PhysicsTechnische Universität KaiserslauternErwin-Schrödinger-Str. 4667663KaiserslauternGermany
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Scherthan L, Pfleger RF, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Alp EE, Anson CE, Diller R, Powell AK, Schünemann V. Frontispiece: Exploring the Vibrational Side of Spin‐Phonon Coupling in Single‐Molecule Magnets via
161
Dy Nuclear Resonance Vibrational Spectroscopy. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/anie.202082361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lena Scherthan
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Rouven F. Pfleger
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
| | - Hendrik Auerbach
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Tim Hochdörffer
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Juliusz A. Wolny
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Wenli Bi
- Advanced Photon Source Argonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA
- Department of Physics University of Alabama at Birmingham Birmingham AL 35294 USA
| | - Jiyong Zhao
- Advanced Photon Source Argonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source Argonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source Argonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
| | - Rolf Diller
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
- Institute of Nanotechnology Karlsruhe Institute of Technology 76021 Karlsruhe Germany
| | - Volker Schünemann
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
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Khan A, Fuhr O, Akhtar MN, Lan Y, Thomas M, Powell AK. Synthesis, characterization and magnetic studies of dinuclear lanthanide complexes constructed with a Schiff base ligand. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1759044] [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: 10/24/2022]
Affiliation(s)
- Amin Khan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
- Department of Chemistry, University of Science and Technology Bannu, Bannu, Pakistan
| | - Olaf Fuhr
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Muhammad Nadeem Akhtar
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Yanhua Lan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Madhu Thomas
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
| | - Annie K. Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
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Scherthan L, Pfleger RF, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Alp EE, Anson CE, Diller R, Powell AK, Schünemann V. Untersuchung von Schwingungen in Bezug auf Spin‐Phonon‐Kopplung in Einzelmolekülmagneten mittels nuklearer inelastischer Streuung am
161
Dy‐Kern. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lena Scherthan
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Rouven F. Pfleger
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
| | - Hendrik Auerbach
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Tim Hochdörffer
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Juliusz A. Wolny
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Wenli Bi
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Physics University of Alabama at Birmingham Birmingham AL 35294 USA
| | - Jiyong Zhao
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
| | - Rolf Diller
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Deutschland
- Institute of Nanotechnology Karlsruhe Institute of Technology 76021 Karlsruhe Deutschland
| | - Volker Schünemann
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Deutschland
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Peewasan K, Merkel MP, Fuhr O, Powell AK. A designed and potentially decadentate ligand for use in lanthanide(iii) catalysed biomass transformations: targeting diastereoselective trans-4,5-diaminocyclopentenone derivatives. Dalton Trans 2020; 49:2331-2336. [DOI: 10.1039/d0dt00183j] [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: 01/02/2023]
Abstract
The catalysis of furfural to diastereoselective trans-4,5-diaminocyclopentenone building blocks for natural product synthesis for a wide range of amines was achieved under mild aerobic conditions.
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Affiliation(s)
- Krisana Peewasan
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Marcel P. Merkel
- Institute of Nanotechnology
- Karlsruhe Institute of Technology Campus North
- 76344 Eggenstein-Leopoldshafen Karlsruhe
- Germany
| | - Olaf Fuhr
- Institute of Nanotechnology
- Karlsruhe Institute of Technology Campus North
- 76344 Eggenstein-Leopoldshafen Karlsruhe
- Germany
- Karlsruhe Nano Micro Facility Karlsruhe Institute of Technology
| | - Annie K. Powell
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
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41
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Dadfar SMM, Sekula-Neuner S, Trouillet V, Liu HY, Kumar R, Powell AK, Hirtz M. Evaluation of click chemistry microarrays for immunosensing of alpha-fetoprotein (AFP). Beilstein J Nanotechnol 2019; 10:2505-2515. [PMID: 31921529 PMCID: PMC6941445 DOI: 10.3762/bjnano.10.241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
The level of cancer biomarkers in cells, tissues or body fluids can be used for the prediction of the presence of cancer or can even indicate the stage of the disease. Alpha-fetoprotein (AFP) is the most commonly used biomarker for early screening and diagnosis of hepatocellular carcinoma (HCC). Here, a combination of three techniques (click chemistry, the biotin-streptavidin-biotin sandwich strategy and the use of antigen-antibody interactions) were combined to implement a sensitive fluorescent immunosensor for AFP detection. Three types of functionalized glasses (dibenzocyclooctyne- (DBCO-), thiol- and epoxy-terminated surfaces) were biotinylated by employing the respective adequate click chemistry counterparts (biotin-thiol or biotin-azide for the first class, biotin-maleimide or biotin-DBCO for the second class and biotin-amine or biotin-thiol for the third class). The anti-AFP antibody was immobilized on the surfaces via a biotin-streptavidin-biotin sandwich technique. To evaluate the sensing performance of the differently prepared surfaces, fluorescently labeled AFP was spotted onto them via microchannel cantilever spotting (µCS). Based on the fluorescence measurements, the optimal microarray design was found and its sensitivity was determined.
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Affiliation(s)
- Seyed Mohammad Mahdi Dadfar
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
| | - Sylwia Sekula-Neuner
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
| | - Vanessa Trouillet
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
- Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
| | - Hui-Yu Liu
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
| | - Ravi Kumar
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131 Karlsruhe, Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany
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42
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Nekuruh S, Nehrkorn J, Prsa K, Dreiser J, Ako AM, Anson CE, Unruh T, Powell AK, Waldmann O. Multimodeling Approach to Ferromagnetic Spin-Wave Excitations in the High-Spin Cluster Mn 18Sr Observed by Inelastic Neutron Scattering. Inorg Chem 2019; 58:11256-11268. [PMID: 31385695 DOI: 10.1021/acs.inorgchem.9b02134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The magnetism of the mixed-valence high-spin cluster [Mn18SrO8(N3)7Cl(MedhmpH)12(MeCN)6]Cl2 (1) exhibiting intramolecular ferromagnetic interactions was studied using inelastic neutron scattering (INS), and reliable values for the exchange coupling constants were determined based on the quality of simultaneous fits to the INS and magnetic data. The challenge of the huge size of the Hilbert space (3 375 000) and many exchange coupling constants (7 assuming a C3 symmetry) generally encountered in large spin clusters was resolved as follows: (a) The results of the restricted Hilbert space ferromagnetic cluster spin wave theory were compared to the experimental spectroscopic data. The observed INS transitions were thus assigned to spin wave excitations in a bounded ferromagnetic spin cluster and moreover could be visualized in a straightforward way based on this theory. (b) Simultaneously, Quantum Monte Carlo (QMC) calculations of the temperature-dependent magnetic susceptibility with the same parameter set were compared to the experimental data. Application of state-of-the-art QMC algorithms, as available in the open source ALPS package, in ferromagnetic clusters avoids the full Hamiltonian diagonalization without sacrificing calculation accuracy of the magnetic susceptibility down to the lowest temperatures, which was crucial for the successful analysis. The combined fits revealed two exchange-coupling models with equally good overall agreement to the data. Our preferred model was inspired by magnetostructural correlations and is consistent with them. The model involves three different exchange interactions, one describing the interaction between the core MnIII spins Ja = 14.3(1.0) K and two interactions linking the core and the peripheral MnII spins: Jb = 8.3(4) K and J6 = 3.6(4) K. The use of open-source QMC software and our systematic approach to fitting multiple sets of data obtained by different experimental techniques are described in detail and are generally applicable for understanding large ferromagnetically coupled clusters.
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Affiliation(s)
- Siyavash Nekuruh
- Physikalisches Institut , Universität Freiburg , Hermann-Herder-Strasse 3 , 79104 Freiburg , Germany
| | - Joscha Nehrkorn
- Physikalisches Institut , Universität Freiburg , Hermann-Herder-Strasse 3 , 79104 Freiburg , Germany
| | - Krunoslav Prsa
- Physikalisches Institut , Universität Freiburg , Hermann-Herder-Strasse 3 , 79104 Freiburg , Germany
| | - Jan Dreiser
- Physikalisches Institut , Universität Freiburg , Hermann-Herder-Strasse 3 , 79104 Freiburg , Germany
| | - Ayuk M Ako
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15 , Geb. 30.45, D-76131 Karlsruhe , Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15 , Geb. 30.45, D-76131 Karlsruhe , Germany
| | - Tobias Unruh
- Forschungsneutronenquelle Heinz Maier-Leibnitz, FRM II , Technische Universität München , D-85747 Garching , Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15 , Geb. 30.45, D-76131 Karlsruhe , Germany.,Institute for Nanotechnology , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , D-76037 Eggenstein-Leopoldshafen , Germany
| | - Oliver Waldmann
- Physikalisches Institut , Universität Freiburg , Hermann-Herder-Strasse 3 , 79104 Freiburg , Germany
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Peng Y, Singh MK, Mereacre V, Anson CE, Rajaraman G, Powell AK. Mechanism of magnetisation relaxation in {MIII2DyIII2} (M = Cr, Mn, Fe, Al) "Butterfly" complexes: how important are the transition metal ions here? Chem Sci 2019; 10:5528-5538. [PMID: 31293737 PMCID: PMC6552965 DOI: 10.1039/c8sc05362f] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [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: 11/30/2018] [Accepted: 04/04/2019] [Indexed: 11/21/2022] Open
Abstract
We describe the synthesis, characterisation and magnetic studies of four tetranuclear, isostructural "butterfly" heterometallic complexes: [MIII2LnIII2(μ3-OH)2(p-Me-PhCO2)6(L)2] (H2L = 2,2'-((pyridin-2-ylmethyl)azanediyl)bis(ethan-1-ol), M = Cr, Ln = Dy (1), Y (2), M = Mn, Ln = Dy (3), Y (4)), which extend our previous study on the analogous 5 {Fe2Dy2}, 6 {Fe2Y2} and 7 {Al2Dy2} compounds. We also present data on the yttrium diluted 7 {Al2Dy2}: 8 {Al2Dy0.18Y1.82}. Compounds dc and ac magnetic susceptibility data reveal single-molecule magnet (SMM) behaviour for complex 3 {Mn2Dy2}, in the absence of an external magnetic field, with an anisotropy barrier U eff of 19.2 K, while complex 1 {Cr2Dy2}, shows no ac signals even under applied dc field, indicating absence of SMM behaviour. The diluted sample 8 {Al2Dy0.18Y1.82} shows field induced SMM behaviour with an anisotropy barrier U eff of 69.3 K. Furthermore, the theoretical magnetic properties of [MIII2LnIII2(μ3-OH)2(p-Me-PhCO2)6(L)2] (M = Cr, 1 or Mn, 3) and their isostructural complexes: [MIII2DyIII2(μ3-OH)2(p-Me-PhCO2)6(L)2] (M = Fe, 5 or Al, 7) are discussed and compared. To understand the experimental observations for this family, DFT and ab initio CASSCF + RASSI-SO calculations were performed. The experimental and theoretical calculations suggest that altering the 3dIII ions can affect the single-ion properties and the nature and the magnitude of the 3dIII-3dIII, 3dIII-DyIII and DyIII-DyIII magnetic coupling, thus quenching the quantum tunneling of magnetisation (QTM) significantly, thereby improving the SMM properties within this motif. This is the first systematic study looking at variation and therefore role of trivalent transition metal ions, as well as the diamgnetic AlIII ion, on slow relaxation of magnetisation within a series of isostructural 3d-4f butterfly compounds.
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Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology , Engesserstrasse 15 , 76131 Karlsruhe , Germany .
- Institute of Nanotechnology , Karlsruhe Institute of Technology , Postfach 3640 , 76021 Karlsruhe , Germany
| | - Mukesh Kumar Singh
- IITB-Monash Research Academy , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India .
| | - Valeriu Mereacre
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology , Engesserstrasse 15 , 76131 Karlsruhe , Germany .
| | - Christopher E Anson
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology , Engesserstrasse 15 , 76131 Karlsruhe , Germany .
| | - Gopalan Rajaraman
- IITB-Monash Research Academy , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India .
| | - Annie K Powell
- Institute of Inorganic Chemistry , Karlsruhe Institute of Technology , Engesserstrasse 15 , 76131 Karlsruhe , Germany .
- Institute of Nanotechnology , Karlsruhe Institute of Technology , Postfach 3640 , 76021 Karlsruhe , Germany
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Tungulin D, Leier J, Carter AB, Powell AK, Albuquerque RQ, Unterreiner AN, Bizzarri C. Cover Feature: Chasing BODIPY: Enhancement of Luminescence in Homoleptic Bis(dipyrrinato) Zn
II
Complexes Utilizing Symmetric and Unsymmetrical Dipyrrins (Chem. Eur. J. 15/2019). Chemistry 2019. [DOI: 10.1002/chem.201900569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dmitry Tungulin
- Institute of Organic ChemistryKarlsruhe Institute of Technology Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Julia Leier
- Institute of Physical ChemistryKarlsruhe Institute of Technology Fritz-Haber-Weg 2 76131 Karlsruhe Germany
| | - Anthony B. Carter
- Institute of Inorganic ChemistryKarlsruhe Institute of Technology Engesserstrasse15 76131 Karlsruhe Germany
- School of ChemistryUniversity of Southampton University Road Southampton SO17 1BJ UK
| | - Annie K. Powell
- Institute of Inorganic ChemistryKarlsruhe Institute of Technology Engesserstrasse15 76131 Karlsruhe Germany
- Institute of NanotechnologyKarlsruhe Institute of Technology Hermann von Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | | | - Andreas N. Unterreiner
- Institute of Physical ChemistryKarlsruhe Institute of Technology Fritz-Haber-Weg 2 76131 Karlsruhe Germany
| | - Claudia Bizzarri
- Institute of Organic ChemistryKarlsruhe Institute of Technology Fritz-Haber-Weg 6 76131 Karlsruhe Germany
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45
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Bereta T, Mondal A, Ślepokura K, Peng Y, Powell AK, Lisowski J. Trinuclear and Hexanuclear Lanthanide(III) Complexes of the Chiral 3+3 Macrocycle: X-ray Crystal Structures and Magnetic Properties. Inorg Chem 2019; 58:4201-4213. [DOI: 10.1021/acs.inorgchem.8b03266] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomasz Bereta
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Abhishake Mondal
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Katarzyna Ślepokura
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Jerzy Lisowski
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
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46
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Scherthan L, Schmidt SFM, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Toellner T, Alp EE, Brown DE, Anson CE, Powell AK, Schünemann V. Rücktitelbild: 161
Dy Time-Domain Synchrotron Mössbauer Spectroscopy for Investigating Single-Molecule Magnets Incorporating Dy Ions (Angew. Chem. 11/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lena Scherthan
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Sebastian F. M. Schmidt
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstr. 15 76131 Karlsruhe Germany
| | - Hendrik Auerbach
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Tim Hochdörffer
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Juliusz A. Wolny
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Wenli Bi
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Geology; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - Jiyong Zhao
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Tom Toellner
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Dennis E. Brown
- Department of Physics; Northern Illinois University; 1425 W. Lincoln Hwy. DeKalb IL 60115-2828 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstr. 15 76131 Karlsruhe Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstr. 15 76131 Karlsruhe Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology; 76131 Karlsruhe Germany
| | - Volker Schünemann
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
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47
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Scherthan L, Schmidt SFM, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Toellner T, Alp EE, Brown DE, Anson CE, Powell AK, Schünemann V. 161
Dy Time‐Domain Synchrotron Mössbauer Spectroscopy for Investigating Single‐Molecule Magnets Incorporating Dy Ions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201810505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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)
- Lena Scherthan
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Sebastian F. M. Schmidt
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
| | - Hendrik Auerbach
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Tim Hochdörffer
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Juliusz A. Wolny
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Wenli Bi
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Geology University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Jiyong Zhao
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Tom Toellner
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source Argonne National Laboratory 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Dennis E. Brown
- Department of Physics Northern Illinois University 1425 W. Lincoln Hwy. DeKalb IL 60115-2828 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry Karlsruhe Institute of Technology Engesserstr. 15 76131 Karlsruhe Germany
- Institute of Nanotechnology Karlsruhe Institute of Technology 76131 Karlsruhe Germany
| | - Volker Schünemann
- Department of Physics Technische Universität Kaiserslautern Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
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48
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Scherthan L, Schmidt SFM, Auerbach H, Hochdörffer T, Wolny JA, Bi W, Zhao J, Hu MY, Toellner T, Alp EE, Brown DE, Anson CE, Powell AK, Schünemann V. Back Cover: 161
Dy Time-Domain Synchrotron Mössbauer Spectroscopy for Investigating Single-Molecule Magnets Incorporating Dy Ions (Angew. Chem. Int. Ed. 11/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201900407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lena Scherthan
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Sebastian F. M. Schmidt
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstr. 15 76131 Karlsruhe Germany
| | - Hendrik Auerbach
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Tim Hochdörffer
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Juliusz A. Wolny
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
| | - Wenli Bi
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Geology; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - Jiyong Zhao
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Michael Y. Hu
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Tom Toellner
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - E. Ercan Alp
- Advanced Photon Source; Argonne National Laboratory; 9700 S. Cass Avenue Argonne IL 60439 USA
| | - Dennis E. Brown
- Department of Physics; Northern Illinois University; 1425 W. Lincoln Hwy. DeKalb IL 60115-2828 USA
| | - Christopher E. Anson
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstr. 15 76131 Karlsruhe Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology; Engesserstr. 15 76131 Karlsruhe Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology; 76131 Karlsruhe Germany
| | - Volker Schünemann
- Department of Physics; Technische Universität Kaiserslautern; Erwin-Schrödinger-Str. 46 67663 Kaiserslautern Germany
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49
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Tungulin D, Leier J, Carter AB, Powell AK, Albuquerque RQ, Unterreiner AN, Bizzarri C. Chasing BODIPY: Enhancement of Luminescence in Homoleptic Bis(dipyrrinato) Zn II Complexes Utilizing Symmetric and Unsymmetrical Dipyrrins. Chemistry 2019; 25:3816-3827. [PMID: 30687972 DOI: 10.1002/chem.201806330] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Indexed: 11/09/2022]
Abstract
Dipyrromethene metal complexes are fascinating molecules that have applications as light-harvesting systems, luminophores, and laser dyes. Recently, it has been shown that structurally rigid bis(dipyrrinato) zinc(II) complexes exhibit high fluorescence with comparable quantum yields to those of boron dipyrromethenes or BODIPYs. Herein, eight new bis(dipyrrinato) ZnII complexes, obtained from symmetric and unsymmetrical functionalization of the dipyrromethene structure through a Knoevenagel reaction, are reported. It was possible not only to vary the maximum visible absorption from 490 to 630 nm, but also to enhance the emission quantum yield up to 66 %, which is extraordinarily high for homoleptic bis(dipyrrinato) zinc complexes. These results pave the way for designing highly luminescent bis(dipyrrinato) zinc complexes.
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Affiliation(s)
- Dmitry Tungulin
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
| | - Julia Leier
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Anthony B Carter
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse15, 76131, Karlsruhe, Germany.,School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse15, 76131, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann von Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Rodrigo Q Albuquerque
- Organic Chemistry Institute, University of Münster, Correnstrasse 40, 48151, Münster, Germany
| | - Andreas N Unterreiner
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany
| | - Claudia Bizzarri
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
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Griffiths K, Kühne IA, Tizzard GJ, Coles SJ, Kostakis GE, Powell AK. Twists to the Spin Structure of the Ln 9-diabolo Motif Exemplified in Two {Zn 2Ln 2}[Ln 9]{Zn 2} Coordination Clusters. Inorg Chem 2019; 58:2483-2490. [PMID: 30702868 DOI: 10.1021/acs.inorgchem.8b03048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Two pentadecanuclear Zn4Ln11 [with Ln = Gd(1) or Dy(2)] coordination clusters, best formulated as {Zn2Ln2}[Ln9]{Zn2}, are presented. The central {Ln9} diabolo core has a {Zn2Ln2} handle motif pulling at two outer Ln ions of the central core via two {ZnLn} units, which also invest the system with C2 point symmetry. The resulting cluster motif is supported on two Zn "feet", corresponding to the {Zn2} unit in the formula. A thorough investigation of the magnetic properties in the light of the properties of previously reported {Ln9} diabolo compounds was undertaken. Up to now, the spin structure of such diabolo motifs usually proves ambiguous. Our magnetic studies show that the orientation of the central spin in the {Gd9} diabolo plays a decisive role. In stabilizing the core by attachment of the {Zn}2+ "feet" and using the C2 symmetry related {ZnGd}5+ handles to influence the spin direction of the central Gd of the {Gd9} diabolo, we can understand why the "naked" {Gd9} diabolo shows ambiguous spin structure. This then allowed us to elucidate the single-molecule magnetic (SMM) properties of the Dy-based compound 2 through disentangling the magnetic properties of the isostructural Gd-based compound 1.
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Affiliation(s)
- Kieran Griffiths
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Irina A Kühne
- Institut für Anorganische Chemie , Karlsruher Institut für Technologie (KIT) , Engesserstr. 15 , 76131 Karlsruhe , Germany
| | - Graham J Tizzard
- UK National Crystallographic Service, Chemistry , University of Southampton , Southampton , SO1 71BJ , United Kingdom
| | - Simon J Coles
- UK National Crystallographic Service, Chemistry , University of Southampton , Southampton , SO1 71BJ , United Kingdom
| | - George E Kostakis
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Annie K Powell
- Institut für Anorganische Chemie , Karlsruher Institut für Technologie (KIT) , Engesserstr. 15 , 76131 Karlsruhe , Germany.,Institut für Nanotechnologie , Karlsruher Institut für Technologie (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
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