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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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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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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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4
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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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Ibrahim M, Mbomekallé IM, de Oliveira P, Bergfeldt T, Anson CE. An Inorganic Pac‐Man: Synthesis, structure and electrochemical studies of a heterometallic {YCoII3W} cluster sandwiched by two germanotungstates. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masooma Ibrahim
- Karlsruher Institut fur Technologie - Campus Nord Institute of Nanotechnology Hermann-von-Helmholtz-Platz 1 Karlsruhe GERMANY
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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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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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8
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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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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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10
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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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11
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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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12
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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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13
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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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14
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Ferrari F, Braun J, Anson CE, Wilts BD, Moatsou D, Bizzarri C. Cyan-Emitting Cu(I) Complexes and Their Luminescent Metallopolymers. Molecules 2021; 26:2567. [PMID: 33924921 PMCID: PMC8125312 DOI: 10.3390/molecules26092567] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 03/19/2021] [Revised: 04/19/2021] [Accepted: 04/26/2021] [Indexed: 11/16/2022] Open
Abstract
Copper complexes have shown great versatility and a wide application range across the natural and life sciences, with a particular promise as organic light-emitting diodes. In this work, four novel heteroleptic Cu(I) complexes were designed in order to allow their integration in advanced materials such as metallopolymers. We herein present the synthesis and the electrochemical and photophysical characterisation of these Cu(I) complexes, in combination with ab initio calculations. The complexes present a bright cyan emission (λem ~ 505 nm) in their solid state, both as powder and as blends in a polymer matrix. The successful synthesis of metallopolymers embedding two of the novel complexes is shown. These copolymers were also found to be luminescent and their photophysical properties were compared to those of their polymer blends. The chemical nature of the polymer backbone contributes significantly to the photoluminescence quantum yield, paving a route for the strategic design of novel luminescent Cu(I)-based polymeric materials.
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Affiliation(s)
- Federico Ferrari
- Karlsruhe Institute of Technology, Institute of Organic Chemistry, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany;
| | - Jonas Braun
- Karlsruhe Institute of Technology, Institute of Inorganic Chemistry, Engesserstrasse 15, 76131 Karlsruhe, Germany; (J.B.); (C.E.A.)
| | - Christopher E. Anson
- Karlsruhe Institute of Technology, Institute of Inorganic Chemistry, Engesserstrasse 15, 76131 Karlsruhe, Germany; (J.B.); (C.E.A.)
| | - Bodo D. Wilts
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland;
| | - Dafni Moatsou
- Karlsruhe Institute of Technology, Institute of Organic Chemistry, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany;
| | - Claudia Bizzarri
- Karlsruhe Institute of Technology, Institute of Organic Chemistry, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany;
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15
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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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16
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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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17
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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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18
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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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19
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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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20
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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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21
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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
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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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23
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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
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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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24
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Matern E, Anson CE, Baum E, Sattler E, Kovács I. Phosphanylphosphinidene‐Phosphoranes: A Study on Building and Decomposition of Phosphorus‐Rich Chains with Two Ylidic Moieties. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000073] [Citation(s) in RCA: 3] [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)
- Eberhard Matern
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstrasse 15 76131 Karlsruhe Germany
| | - Christopher E. Anson
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstrasse 15 76131 Karlsruhe Germany
| | - Elke Baum
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstrasse 15 76131 Karlsruhe Germany
| | - Ewald Sattler
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstrasse 15 76131 Karlsruhe Germany
| | - Ilona Kovács
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Szt. Gellért tér 4. 1111 Budapest Hungary
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25
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Ibrahim M, Mbomekallé IM, de Oliveira P, Baksi A, Carter AB, Peng Y, Bergfeldt T, Malik S, Anson CE. Syntheses, Crystal Structure, Electrocatalytic, and Magnetic Properties of the Monolanthanide-Containing Germanotungstates [Ln(H 2O) n GeW 11O 39] 5- (Ln = Dy, Er, n = 4,3). ACS Omega 2019; 4:21873-21882. [PMID: 31891065 PMCID: PMC6933596 DOI: 10.1021/acsomega.9b02846] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
Two monolanthanide-containing polyanions based on monolacunary Keggin germanotungstates [Ln(H2O) n GeW11O39]5- (Ln = Dy, Er, n = 4,3) have been synthesized in simple one-pot synthetic procedure and compositionally characterized in solid state by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. Electronic absorption and emission spectra of the title compounds in solution were also studied. The [DyIII(H2O)4GeW11O39]5- Keggin POM exhibits a slow relaxation of magnetization. The cyclic voltammetry measurements and mass spectrometry were carried out to check the stability of the compounds in solution. Both polyanions prove efficient in the electrocatalytic reduction of nitrite. To our knowledge, this observation establishes the first example of electrocatalysis of nitrite reduction by all inorganic monolanthanide-containing germanotungstates family.
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Affiliation(s)
- Masooma Ibrahim
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Israël M. Mbomekallé
- Equipe
d'Electrochimie et Photo-électrochimie, Laboratoire de
Chimie
Physique, Université Paris-Sud, UMR 8000, CNRS-Université
Paris Saclay, Orsay F-91405, France
| | - Pedro de Oliveira
- Equipe
d'Electrochimie et Photo-électrochimie, Laboratoire de
Chimie
Physique, Université Paris-Sud, UMR 8000, CNRS-Université
Paris Saclay, Orsay F-91405, France
| | - Ananya Baksi
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Anthony B. Carter
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology, Engesserstrasse
15, 76128 Karlsruhe, Germany
- School
of Chemistry University of Southampton University Road, SO17 1BJ Southampton, U.K.
| | - Yan Peng
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology, Engesserstrasse
15, 76128 Karlsruhe, Germany
| | - Thomas Bergfeldt
- Institutes
for Applied Materials (IAM-AWP), Karlsruhe
Institute of Technology (KIT), 76131 Karlsruhe, Germany
| | - Sharali Malik
- Institute
of Nanotechnology, 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, 76128 Karlsruhe, Germany
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26
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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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27
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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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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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29
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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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30
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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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31
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Perfetti M, Rinck J, Cucinotta G, Anson CE, Gong X, Ungur L, Chibotaru L, Boulon ME, Powell AK, Sessoli R. Single Crystal Investigations Unravel the Magnetic Anisotropy of the "Square-In Square" Cr 4Dy 4 SMM Coordination Cluster. Front Chem 2019; 7:6. [PMID: 30733942 PMCID: PMC6353784 DOI: 10.3389/fchem.2019.00006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 01/07/2019] [Indexed: 01/15/2023] Open
Abstract
In the search for new single molecule magnets (SMM), i.e., molecular systems that can retain their magnetization without the need to apply an external magnetic field, a successful strategy is to associate 3d and 4f ions to form molecular coordination clusters. In order to efficiently design such systems, it is necessary to chemically project both the magnetic building blocks and the resultant interaction before the synthesis. Lanthanide ions can provide the required easy axis magnetic anisotropy that hampers magnetization reversal. In the rare examples of 3d/4f SMMs containing CrIII ions, the latter turn out to act as quasi-isotropic anchors which can also interact via 3d-4f coupling to neighbouring Ln centres. This has been demonstrated in cases where the intramolecular exchange interactions mediated by CrIII ions effectively reduce the efficiency of tunnelling without applied magnetic field. However, describing such high nuclearity systems remains challenging, from both experimental and theoretical perspectives, because the overall behaviour of the molecular cluster is heavily affected by the orientation of the individual anisotropy axes. These are in general non-collinear to each other. In this article, we combine single crystal SQUID and torque magnetometry studies of the octanuclear [Cr4Dy4(μ3-OH)4(μ-N3)4(mdea)4(piv)8]·3CH2Cl2 single molecule magnet (piv=pivalate and mdea=N-methyldiethanol amine). These experiments allowed us to probe the magnetic anisotropy of this complex which displays slow magnetization dynamics due to the peculiar arrangement of the easy-axis anisotropy on the Dy sites. New ab initio calculations considering the entire cluster are in agreement with our experimental results.
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Affiliation(s)
- Mauro Perfetti
- Laboratory of Molecular Magnetism, Università Degli Studi di Firenze, Sesto Fiorentino, Italy
| | - Julia Rinck
- Institute of Functional Interfaces, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Giuseppe Cucinotta
- Laboratory of Molecular Magnetism, Università Degli Studi di Firenze, Sesto Fiorentino, Italy
| | | | - Xuejun Gong
- Department of Chemistry, Katholische Universität Leuven, Leuven, Belgium
| | - Liviu Ungur
- Department of Chemistry, Katholische Universität Leuven, Leuven, Belgium
| | - Liviu Chibotaru
- Department of Chemistry, Katholische Universität Leuven, Leuven, Belgium
| | - Marie-Emmanuelle Boulon
- Laboratory of Molecular Magnetism, Università Degli Studi di Firenze, Sesto Fiorentino, Italy
| | - Annie K Powell
- Institut für Anorganische Chemie, KIT, Karlsruhe, Germany.,Institut für Nanotechnologie, KIT, Eggenstein-Leopoldshafen, Germany
| | - Roberta Sessoli
- Laboratory of Molecular Magnetism, Università Degli Studi di Firenze, Sesto Fiorentino, Italy
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32
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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; 58:3444-3449. [DOI: 10.1002/anie.201810505] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/23/2018] [Indexed: 11/07/2022]
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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33
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Ibrahim M, Mbomekallé IM, de Oliveira P, Kostakis GE, Anson CE. Synthesis, structure and electrochemical characterization of an isopolytungstate (W4O16) held by MnII anchors within a superlacunary crown heteropolyanion {P8W48}. Dalton Trans 2019; 48:15545-15552. [DOI: 10.1039/c9dt02478f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The first example of an isopolyanion (W4O16) held by redox-active MnII anchors within an archetypal superlacunary heteropolyanion {P8W48}.
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Affiliation(s)
- Masooma Ibrahim
- Institute of Nanotechnology
- Karlsruhe Institute of Technology
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Israël M. Mbomekallé
- Equipe d'Electrochimie et Photo-électrochimie
- Laboratoire de Chimie Physique
- Université Paris-Sud
- UMR 8000
- CNRS-Université Paris Saclay
| | - Pedro de Oliveira
- Equipe d'Electrochimie et Photo-électrochimie
- Laboratoire de Chimie Physique
- Université Paris-Sud
- UMR 8000
- CNRS-Université Paris Saclay
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34
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Peewasan K, Merkel MP, Zarschler K, Stephan H, Anson CE, Powell AK. Tetranuclear Cu(ii)-chiral complexes: synthesis, characterization and biological activity. RSC Adv 2019; 9:24087-24091. [PMID: 35527904 PMCID: PMC9069531 DOI: 10.1039/c9ra03586a] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/19/2019] [Indexed: 01/16/2023] Open
Abstract
A pair of tetranuclear chiral Cu(ii)-Schiff-base complexes were synthesized using enantiomerically pure (S)-H2L and (R)-H2L ligands. These were characterised using single-crystal X-ray diffraction and CD spectroscopy and their biological activity tested.
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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
- Karlsruhe
- Germany
| | - Kristof Zarschler
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-ZentrumDresden-Rossendorf
- D-01328 Dresden
- Germany
| | - Holger Stephan
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-ZentrumDresden-Rossendorf
- D-01328 Dresden
- Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
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35
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Vieru V, Ungur L, Cemortan V, Sukhanov A, Baniodeh A, Anson CE, Powell AK, Voronkova V, Chibotaru LF. Magnetization Blocking in Fe2
III
Dy2
III
Molecular Magnets: Ab Initio Calculations and EPR Spectroscopy. Chemistry 2018; 24:16652-16661. [DOI: 10.1002/chem.201803821] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Veacheslav Vieru
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
| | - Liviu Ungur
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
- Department of Chemistry; National University of Singapore; Block S8 Level 3, 3 Science Drive 3 Singapore 117543 Singapore
| | - Valeriu Cemortan
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
| | - Andrey Sukhanov
- Zavoisky Physical-Technical Institute; FRC Kazan Scientific Center of RAS; Kazan Russian Federation
| | - Amer Baniodeh
- 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
| | - 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
| | - Violeta Voronkova
- Zavoisky Physical-Technical Institute; FRC Kazan Scientific Center of RAS; Kazan Russian Federation
| | - Liviu F. Chibotaru
- Theory of Nanomaterials Group; Katholieke Universiteit Leuven; Celestijnenlaan 200F 3001 Leuven Belgium
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36
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Peng Y, Anson CE, Powell AK. Cover Feature: A W-Shaped Ga-Dy-Dy-Dy-Ga Cluster: Synthesis, Characterization, and Magnetic Properties (ChemPlusChem 7/2018). Chempluschem 2018. [DOI: 10.1002/cplu.201800266] [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)
- Yan Peng
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology (KIT); Engesserstrasse 15 76133 Karlsruhe Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); Postfach 3640 76021 Karlsruhe Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology (KIT); Engesserstrasse 15 76133 Karlsruhe Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology (KIT); Engesserstrasse 15 76133 Karlsruhe Germany
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); Postfach 3640 76021 Karlsruhe Germany
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37
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Peng Y, Anson CE, Powell AK. A W-Shaped Ga-Dy-Dy-Dy-Ga Cluster: Synthesis, Characterization, and Magnetic Properties. Chempluschem 2018; 83:676-681. [PMID: 31950630 DOI: 10.1002/cplu.201800049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/22/2018] [Indexed: 11/09/2022]
Abstract
A W-shaped {Ga-Dy-Dy-Dy-Ga} coordination cluster, [Ga2 Dy3 (L)6 (MeO)2 (MeOH)3 ]⋅NO3 ⋅7 MeOH (1) with H2 L, (E)-2-(2-hydroxy-3-methoxy-benzylideneamino)phenol was synthesized, characterized, and the magnetic properties investigated. The magnetic measurements indicate that the compound shows single-molecule magnet (SMM) behavior under zero dc field. This suggests that the combination of GaIII ions and DyIII ions (4 f) is a successful strategy to assemble SMM clusters. The combination of these metal ions also offers prospects in dual functionality therapeutics for medical applications.
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Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76133, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021, Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76133, Karlsruhe, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76133, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021, Karlsruhe, Germany
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38
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Peng Y, Mereacre V, Anson CE, Powell AK. Butterfly M 2 IIIEr 2 (M III = Fe and Al) SMMs: Synthesis, Characterization, and Magnetic Properties. ACS Omega 2018; 3:6360-6368. [PMID: 31458819 PMCID: PMC6644375 DOI: 10.1021/acsomega.8b00550] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 04/27/2018] [Indexed: 06/10/2023]
Abstract
The reaction of N-(2-pyridylmethyl)iminodiethanol (H2L, pmide), FeCl2·4H2O or AlCl3·6H2O with ErCl3·6H2O and p-Me-PhCO2H in the ratio of 2:1:1:4 in the presence of Et3N in MeOH and MeCN yielded compounds [Fe2Er2(μ3-OH)2(pmide)2(p-Me-PhCO2)6]·2MeCN (1) and [Al2Er2(μ3-OH)2(pmide)2(p-Me-PhCO2)6]·2MeCN (2). These two complexes are isostructural, possessing a planar butterfly motif with the ErIII ions in the wingtip positions. Both compounds show single molecule magnet (SMM) behavior. For the [Al2Er2] compound, the slow relaxation of the magnetization under zero applied direct current (dc) field does not show maxima, but the relaxation processes could be analyzed using an applied dc field of 1000 Oe. In-depth alternating current measurements under different dc fields on the [Fe2Er2] compound reveals that the Fe-Fe and Fe-Er interactions speed up the relaxation and decrease the energy barrier height of the SMM in comparison with the [Al2Er2] case.
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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
| | - 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
| | - 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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39
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Ibrahim M, Moreno-Pineda E, Bergfeldt T, Anson CE, Powell AK. Synthesis and Characterization of a Heterometallic Extended Architecture Based on a Manganese(II)-Substituted Sandwich-Type Polyoxotungstate. Materials (Basel) 2018; 11:ma11010155. [PMID: 29342122 PMCID: PMC5793653 DOI: 10.3390/ma11010155] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 01/11/2018] [Accepted: 01/13/2018] [Indexed: 11/16/2022]
Abstract
The reaction of [α-P2W15O56]12− with MnII and DyIII in an aqueous basic solution led to the isolation of an all inorganic heterometallic aggregate Na10(OH2)42[{Dy(H2O)6}2Mn4P4W30O112(H2O)2]·17H2O (Dy2Mn4-P2W15). Single-crystal X-ray diffraction revealed that Dy2Mn4-P2W15 crystallizes in the triclinic system with space group P1¯, and consists of a tetranuclear manganese(II)-substituted sandwich-type phosphotungstate [Mn4(H2O)2(P2W15O56)2]16− (Mn4-P2W15), Na, and DyIII cations. Compound Dy2Mn4-P2W15 exhibits a 1D ladder-like chain structure based on sandwich-type segments and dysprosium cations as linkers, which are further connected into a three-dimensional open framework by sodium cations. The title compound was structurally and compositionally characterized in solid state by single-crystal XRD, powder X-ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TGA), and elemental analyses. Further, the absorption and emission electronic spectra in aqueous solutions of Dy2Mn4-P2W15 and Mn4-P2W15 were studied. Also, magnetic properties were studied and compared with the magnetic behavior of [Mn4(H2O)2(P2W15O56)2]16−.
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Affiliation(s)
- Masooma Ibrahim
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021 Karlsruhe, Germany.
| | - Eufemio Moreno-Pineda
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021 Karlsruhe, Germany.
| | - Thomas Bergfeldt
- Institute for Applied Materials (IAM-AWP), Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021 Karlsruhe, Germany.
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany.
| | - Annie K Powell
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Postfach 3640, 76021 Karlsruhe, Germany.
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany.
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40
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Akhtar MN, Lan Y, AlDamen MA, Zheng YZ, Anson CE, Powell AK. Effect of ligand substitution on the SMM properties of three isostructural families of double-cubane Mn4Ln2 coordination clusters. Dalton Trans 2018; 47:3485-3495. [DOI: 10.1039/c7dt04304j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Three isostructural Mn–Ln families consists of 22 complexes have been presented. Only 7, 15, and 22 for Tb, 8 and 16 for Dy, and 20 for Sm displayed slow magnetization relaxation.
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Affiliation(s)
- Muhammad Nadeem Akhtar
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
| | - Yanhua Lan
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Murad A. AlDamen
- Department of Chemistry
- Faculty of Science & Arts
- Al Ula Branch
- Taibah University
- Saudi Arabia
| | - Yan-Zhen Zheng
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Frontier Institute of Science and Technology
| | - Christopher E. Anson
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institut für Nanotechnologie
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41
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Kumar P, Griffiths K, Anson CE, Powell AK, Kostakis GE. A tetranuclear CuII2DyIII2 coordination cluster as a Suzuki (C–C) coupling reaction promoter. Dalton Trans 2018; 47:17202-17205. [DOI: 10.1039/c8dt04371j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The air stable and high yielding tetranuclear coordination cluster [CuII2DyIII2L4(NO3)2(CH3CN)2]·2(CH3CN) promotes the Suzuki coupling reaction of phenylboronic acid with substituted aryl halides under environmentally benign conditions.
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Affiliation(s)
- Prashant Kumar
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN19QJ
- UK
| | - Kieran Griffiths
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN19QJ
- UK
| | - Christopher E. Anson
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
| | - George E. Kostakis
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN19QJ
- UK
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42
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Abouelwafa AS, Hauser A, Mereacre V, Lan Y, Long GJ, Grandjean F, Buth G, Anson CE, Powell AK. Search for Electron Delocalization from [Fe(CN)6]3– to the Dication of Viologen in (DNP)3[Fe(CN)6]2·10H2O. Inorg Chem 2017; 56:6477-6488. [DOI: 10.1021/acs.inorgchem.7b00540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ahmed S. Abouelwafa
- Département
de Chimie Physique, Université de Genève, 30 Quai
Ernest Ansermet, CH-1211 Genève, Switzerland
- Institut
für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Andreas Hauser
- Département
de Chimie Physique, Université de Genève, 30 Quai
Ernest Ansermet, CH-1211 Genève, Switzerland
| | - Valeriu Mereacre
- Institut
für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Yanhua Lan
- Institut
für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Gary J. Long
- Department of Chemistry,
Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010, United States
| | - Fernande Grandjean
- Department of Chemistry,
Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010, United States
- Faculty of Sciences, University of Liège, B-4000 Sart-Tilman, Belgium
| | | | - Christopher E. Anson
- Institut
für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Annie K. Powell
- Institut
für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
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43
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Peng Y, Mereacre V, Anson CE, Zhang Y, Bodenstein T, Fink K, Powell AK. Field-Induced Co(II) Single-Ion Magnets with mer-Directing Ligands but Ambiguous Coordination Geometry. Inorg Chem 2017; 56:6056-6066. [PMID: 28485955 DOI: 10.1021/acs.inorgchem.6b02743] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three air-stable Co(II) mononuclear complexes with different aromatic substituents have been prepared and structurally characterized by single-crystal X-ray diffraction. The mononuclear complexes [Co(H2L1)2]·2THF (1), [Co(HL2)2] (2), and [Co(H2L3)2]·CH2Cl2 (3) (where H3L1, H2L2, and H3L3 represent 3-hydroxy-naphthalene-2-carboxylic acid (6-hydroxymethyl-pyridin-2-ylmethylene) hydrazide, nicotinic acid (6-hydroxymethyl-pyridin-2-ylmethylene) hydrazide, and 2-hydroxy-benzoic acid (6-hydroxymethyl-pyridin-2-ylmethylene) hydrazide, respectively) feature a distorted mer octahedral coordination geometry. Detailed magnetic studies of 1-3 have been conducted using direct and alternating current magnetic susceptibility data. Field-induced slow magnetic relaxation was observed for these three complexes. There are few examples of such behavior in (distorted) octahedral coordination geometry (OC) Co(II) mononuclear complexes with uniaxial anisotropy. Analysis of the six-coordinate Co(II) mononuclear single-ion magnets (SIMs) in the literature using the SHAPE program revealed that they all show what is best described as distorted trigonal prismatic (TRP) coordination geometry, and in general, these show negative D zero-field splitting (ZFS) values. On the other hand, all the Co(II) mononuclear complexes displaying what is best approximated as distorted octahedral (OC) coordination geometry show positive D values. In the new Co(II) mononuclear complexes we describe here, there is an ambiguity, since the rigid tridentate ligands confer what is best described for an octahedral complex as a mer coordination geometry, but the actual shape of the first coordination sphere is between octahedral and trigonal prismatic. The negative D values observed experimentally and supported by high-level electronic structure calculations are thus in line with a trigonal prismatic geometry. However, a consideration of the rhombicity as indicated by the E value of the ZFS in conjunction with the SHAPE analysis shows that in this case it is difficult to distinguish between the OC and TRP descriptions.
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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
| | - 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
| | - Yiquan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University , 210023 Nanjing, China
| | - Tilmann Bodenstein
- qLEAP Center fpr Theoretical Chemistry, Department of Chemistry, Aarhus University , Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology , Postfach 3640, 76021 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 , Postfach 3640, 76021 Karlsruhe, Germany
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Schmidt SFM, Koo C, Mereacre V, Park J, Heermann DW, Kataev V, Anson CE, Prodius D, Novitchi G, Klingeler R, Powell AK. A Three-Pronged Attack To Investigate the Electronic Structure of a Family of Ferromagnetic Fe 4Ln 2 Cyclic Coordination Clusters: A Combined Magnetic Susceptibility, High-Field/High-Frequency Electron Paramagnetic Resonance, and 57Fe Mössbauer Study. Inorg Chem 2017; 56:4796-4806. [PMID: 28186414 DOI: 10.1021/acs.inorgchem.6b02682] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present the synthesis, structure, magnetic properties, as well as the Mössbauer and electron paramagnetic resonance studies of a ring-shaped [FeIII4LnIII2(Htea)4(μ-N3)4(N3)3(piv)3] (Ln = Y 1, Gd 2, Tb 3, Dy 4, Ho 5, Er, 6) coordination cluster. The Dy, Tb, and Ho analogues show blocking of the magnetization at low temperatures without applied fields. The anisotropy of the 3d ion and the exchange interaction between 3d and 4f ions in Fe4Ln2 complexes are unambiguously determined by high-field/high-frequency electron paramagnetic resonance measurements at low temperature. Ferromagnetic exchange interaction JFe-Ln is found which decreases upon variation of the Ln ions to larger atomic numbers. This dependence is similar to the behavior shown in the effective barrier values of complexes 3-5. Further information about the anisotropy of the Ln3+ ions was gathered with 57Fe Mössbauer spectroscopy, and the combination of these methods provides detailed information regarding the electronic structure of these complexes.
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Affiliation(s)
- Sebastian F M Schmidt
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | | | - Valeriu Mereacre
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | | | - Dieter W Heermann
- Institute for Theoretical Physics, Philosophenweg 16, Heidelberg University , 69120 Heidelberg, Germany
| | - Vladislav Kataev
- Leibniz Institute for Solid State and Materials Research , Helmholtzstrasse 20, IFW Dresden, 01069 Dresden, Germany
| | - Christopher E Anson
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Denis Prodius
- Institute of Chemistry, Academy of Sciences of Moldova , Chisinau, Moldova
| | - Ghenadie Novitchi
- Laboratoire National des Champs Magnétiques Intenses, UPR CNRS 3228, Grenoble, France
| | | | - Annie K Powell
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie , Engesserstrasse 15, 76131 Karlsruhe, Germany.,Karlsruhe Institute of Technology, Institute of Nanotechnology , Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Walz F, Moos E, Garnier D, Köppe R, Anson CE, Breher F. A Redox-Switchable Germylene and its Ligating Properties in Selected Transition Metal Complexes. Chemistry 2017; 23:1173-1186. [PMID: 27883244 DOI: 10.1002/chem.201605073] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [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: 10/31/2016] [Indexed: 12/22/2022]
Abstract
The synthesis, structure, and full characterization of a redox-switchable germylene based on a [3]ferrocenophane ligand arrangement, [Fc(NMes)2 Ge] (4), is presented. The mesityl (Mes)-substituted title compound is readily available from Fc(NHMes)2 (2) and Ge{N(SiMe3 )2 }2 , or from the dilithiated, highly air- and moisture-sensitive compound Fc(NLiMes)2 ⋅3 Et2 O (3) and GeCl2 . Cyclic voltammetry studies are provided for 4, confirming the above-mentioned view of a redox-switchable germylene metalloligand. Although several 1:1 RhI and IrI complexes of 4 (5-7) are cleanly formed in solution, all attempts to isolate them in pure form failed due to stability problems. However, crystalline solids of [Mo(κ1 Ge-4)2 (CO)4 ] (8) and [W(κ1 Ge-4)2 (CO)4 ] (9) were isolated and fully characterized by common spectroscopic techniques (8 by X-ray diffraction). DFT calculations were performed on a series of model compounds to elucidate a conceivable interplay between the metal atoms in neutral and cationic bimetallic complexes of the type [Rh(κ1 E-qE)(CO)2 Cl]0/+ (qE=[Fc(NPh)2 E] with E=C, Si, Ge). The bonding characteristics of the coordinated Fc-based metalloligands (qE/qE+ ) are strongly affected upon in silico oxidation of the calculated complexes. The calculated Tolman electronic parameter (TEP) significantly increases by approximately 20 cm-1 (E=C) to 25 cm-1 (E=Si, Ge) upon oxidation. The change in the ligand-donating abilities upon oxidation can mainly be attributed to Coulombic effects, whereas an orbital-based interaction appears to have only a minor influence.
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Affiliation(s)
- Florian Walz
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Eric Moos
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Delphine Garnier
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany.,Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Ralf Köppe
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
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Schmidt SFM, Merkel MP, Kostakis GE, Buth G, Anson CE, Powell AK. SMM behaviour and magnetocaloric effect in heterometallic 3d–4f coordination clusters with high azide : metal ratios. Dalton Trans 2017; 46:15661-15665. [DOI: 10.1039/c7dt03149a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present the synthesis and characterization of heterometallic compounds with a very large azide to metal ratio and fascinating magnetic properties.
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Affiliation(s)
- Sebastian F. M. Schmidt
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology (KIT)
- D-76131 Karlsruhe
- Germany
| | - Marcel P. Merkel
- Institut für Nanotechnologie
- Karlsruhe Institute of Technology (KIT)
- D-76021 Karlsruhe
- Germany
| | | | - Gernot Buth
- Institute for Photon Science and Synchrotron Radiation (IPS)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Christopher E. Anson
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology (KIT)
- D-76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institut für Anorganische Chemie
- Karlsruhe Institute of Technology (KIT)
- D-76131 Karlsruhe
- Germany
- Institut für Nanotechnologie
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Chen S, Mereacre V, Kostakis GE, Anson CE, Powell AK. Systematic studies of hexanuclear {MIII4LnIII2} complexes (M = Fe, Ga; Ln = Er, Ho): structures, magnetic properties and SMM behavior. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00091j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first heterometallic GaIII–ErIII single-molecule magnet has been synthesized and the role of GaIII in extracting the FeIII–ErIII and ErIII–ErIII interaction has been assessed.
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Affiliation(s)
- Sihuai Chen
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- State Key Laboratory of Structural Chemistry
| | - Valeriu Mereacre
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - George E. Kostakis
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ
- UK
| | - Christopher E. Anson
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
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48
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Peng Y, Mereacre V, Anson CE, Powell AK. The role of coordinated solvent on Co(ii) ions in tuning the single molecule magnet properties in a {CoII2DyIII2} system. Dalton Trans 2017; 46:5337-5343. [DOI: 10.1039/c7dt00548b] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The anisotropy of a single DyIII can be steered through subtle changes in the coordination geometry of the CoII ions in CoII2DyIII2 butterfly compounds resulting from changing the coordinated solvent molecule on the CoII ion.
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Affiliation(s)
- Yan Peng
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
| | - Valeriu Mereacre
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Christopher E. Anson
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
| | - Annie K. Powell
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe
- Germany
- Institute of Nanotechnology
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49
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Ako AM, Hill JP, Anson CE, Ariga K, Powell AK. Syntheses and structural characterization of amphiphilic mononuclear complexes [FeIII(L)(X)2] (X = Br, SCN). J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1231305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ayuk M. Ako
- School of Chemistry, Trinity College Dublin, Dublin, Ireland
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Jonathan P. Hill
- WPI-International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Christopher E. Anson
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Katsuhiko Ariga
- WPI-International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Annie K. Powell
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
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50
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Charalambidis G, Georgilis E, Panda MK, Anson CE, Powell AK, Doyle S, Moss D, Jochum T, Horton PN, Coles SJ, Linares M, Beljonne D, Naubron JV, Conradt J, Kalt H, Mitraki A, Coutsolelos AG, Balaban TS. A switchable self-assembling and disassembling chiral system based on a porphyrin-substituted phenylalanine-phenylalanine motif. Nat Commun 2016; 7:12657. [PMID: 27582363 PMCID: PMC5025786 DOI: 10.1038/ncomms12657] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [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: 06/13/2016] [Accepted: 07/18/2016] [Indexed: 01/01/2023] Open
Abstract
Artificial light-harvesting systems have until now not been able to self-assemble into structures with a large photon capture cross-section that upon a stimulus reversibly can switch into an inactive state. Here we describe a simple and robust FLFL-dipeptide construct to which a meso-tetraphenylporphyrin has been appended and which self-assembles to fibrils, platelets or nanospheres depending on the solvent composition. The fibrils, functioning as quenched antennas, give intense excitonic couplets in the electronic circular dichroism spectra which are mirror imaged if the unnatural FDFD-analogue is used. By slightly increasing the solvent polarity, these light-harvesting fibres disassemble to spherical structures with silent electronic circular dichroism spectra but which fluoresce. Upon further dilution with the nonpolar solvent, the intense Cotton effects are recovered, thus proving a reversible switching. A single crystal X-ray structure shows a head-to-head arrangement of porphyrins that explains both their excitonic coupling and quenched fluorescence.
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Affiliation(s)
- Georgios Charalambidis
- Department of Chemistry, Bioinorganic Chemistry Laboratory, University of Crete, Vassilika Vouton, Heraklion, 70013 Crete, Greece
| | - Evangelos Georgilis
- Department of Materials Science and Technology, University of Crete, Vassilika Vouton, Heraklion, 70013 Crete, Greece
- Institute of Electronic Structure and Laser (I.E.S.L.) Foundation for Research and Technology Hellas (FO.R.T.H.) Vassilika Vouton, Heraklion, 70013 Crete, Greece
| | - Manas K. Panda
- Department of Chemistry, Bioinorganic Chemistry Laboratory, University of Crete, Vassilika Vouton, Heraklion, 70013 Crete, Greece
| | - Christopher E. Anson
- Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Annie K. Powell
- Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstrasse 15, D-76131 Karlsruhe, Germany
- Karlsruhe Institute of Technology (KIT), Institute for Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Stephen Doyle
- Karlsruhe Institute of Technology, Institute for Synchrotron Radiation and ANKA, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - David Moss
- Karlsruhe Institute of Technology, Institute for Synchrotron Radiation and ANKA, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Tobias Jochum
- Karlsruhe Institute of Technology, Institute for Synchrotron Radiation and ANKA, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Peter N. Horton
- School of Chemistry, EPSRC National Crystallography Service, University of Southampton, Highfield, Southampton SO17 1BJ, UK
| | - Simon J. Coles
- School of Chemistry, EPSRC National Crystallography Service, University of Southampton, Highfield, Southampton SO17 1BJ, UK
| | - Mathieu Linares
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
- Swedish e-Science Research Centre (SeRC), Linköping University, SE-581 83 Linköping, Sweden
| | - David Beljonne
- Département de Chimie, Chimie des Matériaux Nouveaux and Centre d'Innovation et de Recherche en Matériaux Polymères, Université de Mons—UMONS/Materia Nova, Place du Parc, 20, B-7000 Mons, Belgium
| | - Jean-Valère Naubron
- Aix Marseille Université, CNRS FR 1739, Spectropole, Avenue Escadrille Normandie Niemen, F-13397 Marseille, France
| | - Jonas Conradt
- Karlsruhe Institute of Technology (KIT), Institute of Applied Physics and Center for Functional Nanostructures (CFN), D-76131 Karlsruhe, Germany
| | - Heinz Kalt
- Karlsruhe Institute of Technology (KIT), Institute of Applied Physics and Center for Functional Nanostructures (CFN), D-76131 Karlsruhe, Germany
| | - Anna Mitraki
- Department of Materials Science and Technology, University of Crete, Vassilika Vouton, Heraklion, 70013 Crete, Greece
- Institute of Electronic Structure and Laser (I.E.S.L.) Foundation for Research and Technology Hellas (FO.R.T.H.) Vassilika Vouton, Heraklion, 70013 Crete, Greece
| | - Athanassios G. Coutsolelos
- Department of Chemistry, Bioinorganic Chemistry Laboratory, University of Crete, Vassilika Vouton, Heraklion, 70013 Crete, Greece
| | - Teodor Silviu Balaban
- Aix Marseille Univ, CNRS, Centrale Marseille, Institut des Sciences Moléculaires de Marseille (iSm2), UMR 7313, Chirosciences, Avenue Escadrille Normandie Niemen, Service 442, F-13397 Marseille, France
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