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Mereacre V, Klöwer F, Lan Y, Clérac R, Wolny JA, Schünemann V, Anson CE, Powell AK. Spin relaxation in antiferromagnetic Fe-Fe dimers slowed down by anisotropic Dy(III) ions. Beilstein J Nanotechnol 2013; 4:807-814. [PMID: 24367750 PMCID: PMC3869222 DOI: 10.3762/bjnano.4.92] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 11/14/2013] [Indexed: 06/03/2023]
Abstract
By using Mössbauer spectroscopy in combination with susceptibility measurements it was possible to identify the supertransferred hyperfine field through the oxygen bridges between Dy(III) and Fe(III) in a {Fe4Dy2} coordination cluster. The presence of the dysprosium ions provides enough magnetic anisotropy to "block" the hyperfine field that is experienced by the iron nuclei. This has resulted in magnetic spectra with internal hyperfine fields of the iron nuclei of about 23 T. The set of data permitted us to conclude that the direction of the anisotropy in lanthanide nanosize molecular clusters is associated with the single ion and crystal field contributions and (57)Fe Mössbauer spectroscopy may be informative with regard to the the anisotropy not only of the studied isotope, but also of elements interacting with this isotope.
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Affiliation(s)
- Valeriu Mereacre
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, D-76128 Karlsruhe, Germany
| | - Frederik Klöwer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, D-76128 Karlsruhe, Germany
| | - Yanhua Lan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, D-76128 Karlsruhe, Germany
| | - Rodolphe Clérac
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Juliusz A Wolny
- Institute of Physics, University of Kaiserslautern, Erwin Schrödingerstr. 56, D-67653 Kaiserslautern, Germany
| | - Volker Schünemann
- Institute of Physics, University of Kaiserslautern, Erwin Schrödingerstr. 56, D-67653 Kaiserslautern, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, D-76128 Karlsruhe, Germany
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, D-76128 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Postfach 3640, D-76021 Karlsruhe, Germany
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Feltham HLC, Lan Y, Klöwer F, Ungur L, Chibotaru LF, Powell AK, Brooker S. Back Cover: A Non‐sandwiched Macrocyclic Monolanthanide Single‐Molecule Magnet: The Key Role of Axiality (Chem. Eur. J. 16/2011). Chemistry 2011. [DOI: 10.1002/chem.201190081] [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: 11/05/2022]
Affiliation(s)
- Humphrey L. C. Feltham
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56 , Dunedin 9054 (New Zealand), Fax: (+64) 3‐479‐7906
| | - Yanhua Lan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15 Geb. 30. 45, 76131 Karlsruhe (Germany)
| | - Frederik Klöwer
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56 , Dunedin 9054 (New Zealand), Fax: (+64) 3‐479‐7906
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15 Geb. 30. 45, 76131 Karlsruhe (Germany)
| | - Liviu Ungur
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijenlaan 200F, 3001, Leuven (Belgium)
- INPAC‐Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijenlaan 200F, 3001, Leuven (Belgium)
| | - Liviu F. Chibotaru
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijenlaan 200F, 3001, Leuven (Belgium)
| | - Annie K. Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15 Geb. 30. 45, 76131 Karlsruhe (Germany)
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56 , Dunedin 9054 (New Zealand), Fax: (+64) 3‐479‐7906
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Feltham HLC, Lan Y, Klöwer F, Ungur L, Chibotaru LF, Powell AK, Brooker S. A Non‐sandwiched Macrocyclic Monolanthanide Single‐Molecule Magnet: The Key Role of Axiality. Chemistry 2011; 17:4362-5. [DOI: 10.1002/chem.201100438] [Citation(s) in RCA: 219] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Indexed: 11/08/2022]
Affiliation(s)
- Humphrey L. C. Feltham
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56 , Dunedin 9054 (New Zealand), Fax: (+64) 3‐479‐7906
| | - Yanhua Lan
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15 Geb. 30. 45, 76131 Karlsruhe (Germany)
| | - Frederik Klöwer
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56 , Dunedin 9054 (New Zealand), Fax: (+64) 3‐479‐7906
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15 Geb. 30. 45, 76131 Karlsruhe (Germany)
| | - Liviu Ungur
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijenlaan 200F, 3001, Leuven (Belgium)
- INPAC‐Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijenlaan 200F, 3001, Leuven (Belgium)
| | - Liviu F. Chibotaru
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijenlaan 200F, 3001, Leuven (Belgium)
| | - Annie K. Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15 Geb. 30. 45, 76131 Karlsruhe (Germany)
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56 , Dunedin 9054 (New Zealand), Fax: (+64) 3‐479‐7906
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Feltham HLC, Klöwer F, Cameron SA, Larsen DS, Lan Y, Tropiano M, Faulkner S, Powell AK, Brooker S. A family of 13 tetranuclear zinc(ii)-lanthanide(iii) complexes of a [3 + 3] Schiff-base macrocycle derived from 1,4-diformyl-2,3-dihydroxybenzene. Dalton Trans 2011; 40:11425-32. [DOI: 10.1039/c1dt11038a] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Klöwer F, Lan Y, Nehrkorn J, Waldmann O, Anson C, Powell A. Modelling the Magnetic Behaviour of Square-Pyramidal CoII5Aggregates: Tuning SMM Behaviour through Variations in the Ligand Shell. Chemistry 2009; 15:7413-22. [DOI: 10.1002/chem.200900101] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hartig J, Klöwer F, Rinck J, Unterreiner AN, Schnöckel H. [Ga24Br18Se2]: ein hochsymmetrischer metalloider Cluster und seine eindimensionale Anordnung im kristallinen Zustand als Modell für photoleitendes festes GaSe. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701986] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hartig J, Klöwer F, Rinck J, Unterreiner AN, Schnöckel H. Ga24Br18Se2: A Highly Symmetrical Metalloid Cluster and Its One-Dimensional Arrangement in the Crystalline State as a Model for the Photoconductivity of Solid GaSe. Angew Chem Int Ed Engl 2007; 46:6549-52. [PMID: 17654642 DOI: 10.1002/anie.200701986] [Citation(s) in RCA: 14] [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)
- Jens Hartig
- Institut für Anorganische Chemie, Universität Karlsruhe, Engesserstrasse 15, Geb. 30.45, 76128 Karlsruhe, Germany
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Ako AM, Waldmann O, Mereacre V, Klöwer F, Hewitt IJ, Anson CE, Güdel HU, Powell AK. Odd-Numbered FeIII Complexes: Synthesis, Molecular Structure, Reactivity, and Magnetic Properties. Inorg Chem 2007; 46:756-66. [PMID: 17257017 DOI: 10.1021/ic061650s] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three isostructural disklike heptanuclear FeIII compounds of the general formula [FeIII7(mu3-O)3(L)3(mu-O2CCMe3)6(eta1-O2CCMe3)3(H2O)3], where L represents a di- or triethanolamine moiety, display a three-blade propeller topology, with the central Fe atom representing the axle or axis of the propeller. This motif corresponds to the theoretical model of a frustrated Heisenberg star, which is one of the very few solvable models in the area of frustrated quantum-spin systems and can, furthermore, be converted to an octanuclear cage for the case where L is triethanolamine to give [FeIII8(mu4O)3(mu4-tea)(teaH)3(O2CCMe3)6(N3)3].1/2MeCN.1/2H2O or [FeIII8(mu4O)3(mu4-tea)(teaH)3(O2CCMe3)6(SCN)3].2MeCN when treated with excess NaN3 or NH4SCN, respectively. The core structure is formally derived from that of the heptanuclear compounds by the replacement of the three aqua ligands by an {Fe(tea)} moiety, so that the 3-fold axis of the propeller is now defined by two central FeIII atoms. Magnetic studies on two of the heptanulcear compounds established unequivocally S = 5/2 spin ground state for these complexes, consistent with overall antiferromagnetic interactions between the constituent FeIII ions.
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Affiliation(s)
- Ayuk M Ako
- Institut für Anorganische Chemie der Universität Karlsruhe, Engesserstrasse Geb. 30.45, D-76128 Karlsruhe, Germany
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