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    • Several versions

    A switchable self-assembling and disassembling chiral system based on a porphyrin-substituted phenylalanine–phenylalanine motif

    Charalambidis, Georgios, Georgilis, Evangelos, Panda, Manas K, Anson, Christopher E, Powell, Annie K, Doyle, Stephen, Moss, David, Jochum, Tobias, Horton, Peter N, Coles, Simon J, Linares, Mathieu, Beljonne, David, Naubron, Jean-Valère, Conradt, Jonas, Kalt, Heinz, Mitraki, Anna, Coutsolelos, Athanassios G, Balaban, Teodor Silviu
    Nature communications, 2016, Vol.7 [Peer Reviewed Journal]

    • Several versions

    Multitechnique investigation of Dy - implications for coupled lanthanide clusters

    Gysler, Maren, El Hallak, Fadi, Ungur, Liviu, Marx, Raphael, Hakl, Michael, Neugebauer, Petr, Rechkemmer, Yvonne, Lan, Yanhua, Sheikin, Ilya, Orlita, Milan, Anson, Christopher E, Powell, Annie K, Sessoli, Roberta, Chibotaru, Liviu F, Van Slageren, Joris
    Chemical science, 01 July 2016, Vol.7(7), pp.4347-4354 [Peer Reviewed Journal]

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    Multitechnique investigation of Dy3-implications for coupled lanthanide clusters

    Gysler, Maren, El Hallak, Fadi, Ungur, Liviu, Marx, Raphael, Hakl, Michael, Neugebauer, Petr, Rechkemmer, Yvonne, Lan, Yanhua, Sheikin, Ilya, Orlita, Milan, Anson, Christopher E, Powell, Annie K, Sessoli, Roberta, Chibotaru, Liviu, van Slageren, Joris
    Chemical Science, 2016, Vol.7(7), pp.4347-4354 [Peer Reviewed Journal]
    KU Leuven Association
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    Title: Multitechnique investigation of Dy3-implications for coupled lanthanide clusters
    Author: Gysler, Maren; El Hallak, Fadi; Ungur, Liviu; Marx, Raphael; Hakl, Michael; Neugebauer, Petr; Rechkemmer, Yvonne; Lan, Yanhua; Sheikin, Ilya; Orlita, Milan; Anson, Christopher E; Powell, Annie K; Sessoli, Roberta; Chibotaru, Liviu; van Slageren, Joris
    Description: In-depth investigations of the low energy electronic structures of mononuclear lanthanide complexes, including single molecule magnets, are challenging at the best of times. For magnetically coupled polynuclear systems, the task seems well nigh impossible. However, without detailed understanding of the electronic structure, there is no hope of understanding their static and dynamic magnetic properties in detail. We have been interested in assessing which techniques are most appropriate for studying lanthanide single-molecule magnets. Here we present a wide ranging theoretical and experimental study of the archetypal polynuclear lanthanide single-molecule magnet Dy3 and derive the simplest model to describe the results from each experimental method, including high-frequency electron paramagnetic resonance and far-infrared spectroscopies and cantilever torque magnetometry. We conclude that a combination of these methods together with ab initio calculations is required to arrive at a full understanding of the properties of this complex, and potentially of other magnetically coupled lanthanide complexes.
    Is part of: Chemical Science, 2016, Vol.7(7), pp.4347-4354
    Identifier: 2041-6520 (ISSN); 10.1039/C6SC00318D (DOI)

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    Tridecanuclear [MnIII 5 LnIII 8 ] Complexes Derived from N-tButyl-diethanolamine: Synthesis, Structures, and Magnetic Properties

    M. Ako, Ayuk, Mereacre, Valeriu, Clérac, Rodolphe, J. Hewitt, Ian, Lan, Yanhua, Buth, Gernot, E. Anson, Christopher, K. Powell, Annie
    Inorganic chemistry, 2009, Vol.48(14) [Peer Reviewed Journal]
    Hyper Article en Ligne (CCSd), Hyper Article en Ligne Open Access (CCSd)
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    Title: Tridecanuclear [MnIII 5 LnIII 8 ] Complexes Derived from N-tButyl-diethanolamine: Synthesis, Structures, and Magnetic Properties
    Author: M. Ako, Ayuk; Mereacre, Valeriu; Clérac, Rodolphe; J. Hewitt, Ian; Lan, Yanhua; Buth, Gernot; E. Anson, Christopher; K. Powell, Annie
    Subject: Chemical Sciences ; Coordination Chemistry ; Synthesis ; Magnetic Properties ; Structures ; Chemistry
    Description: The synthesis, structures and magnetic properties of a family of heterometallic [MnIII 5 LnIII 8 (μ3-OH)12(L2)4(piv)12- (NO3)4(OAc)4]- (Ln = Pr, 2; Nd, 3; Sm, 4; Gd, 5; Tb, 6) aggregates are reported. The complexes were obtained from the direct reaction of N-tbutyldiethanolamine (H2L2) with Mn(OAc)2 3 4H2O and Ln(NO3)3 3 6H2O in the presence of pivalic acid (pivH) in MeCN under ambient conditions. Compounds 2-6 are isomorphous and crystallize in the monoclinic space group P21/n with four molecules in the unit cell. The complexes have a centrosymmetric tridecanuclear anionic core consisting of two distorted inner heterometallic [MnIIILnIII 3 (μ3-OH)4]8+ cubane subunits sharing a common Mn vertex flanked by four edge-sharing heterometallic [MnIIILnIII 2 (μ3-OH)4]5+ defect cubane units. Complexes 2-6 are the first high-nuclearity 3d-4f aggregates reported to date using tBu-deaH2 as ligand. These compounds show no evidence of slow relaxation behavior above 1.8 K, which appears...
    Is part of: Inorganic chemistry, 2009, Vol.48(14)
    Identifier: 0020-1669 (ISSN); 1520-510X (E-ISSN); 10.1021/ic900645d (DOI)

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    A Mn18Dy SMM resulting from the targeted replacement of the central MnII in the S = 83/2 Mn19-aggregate with DyIII

    Ako, Ayuk M, Mereacre, Valeriu, Clérac, Rodolphe, Wernsdorfer, Wolfgang, Hewitt, Ian J, Anson, Christopher E, Powell, Annie K
    Chemical communications (Cambridge, England), 07 February 2009(5), pp.544-6 [Peer Reviewed Journal]
    MEDLINE/PubMed (U.S. National Library of Medicine)
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    Title: A Mn18Dy SMM resulting from the targeted replacement of the central MnII in the S = 83/2 Mn19-aggregate with DyIII
    Author: Ako, Ayuk M; Mereacre, Valeriu; Clérac, Rodolphe; Wernsdorfer, Wolfgang; Hewitt, Ian J; Anson, Christopher E; Powell, Annie K
    Subject: Chemical Sciences/Material Chemistry;
    Description: Anisotropy can be introduced into the [Mn(19)]-aggregate, which currently has the highest known spin ground state of S = 83/2, by the targeted replacement of the central Mn(II) cation with Dy(III) leading to a [Mn(18)Dy] complex with the same core topology showing slow relaxation of the magnetisation.
    Is part of: Chemical communications (Cambridge, England), 07 February 2009(5), pp.544-6
    Identifier: 1359-7345 (ISSN); 19283285 Version (PMID); 10.1039/b814614d (DOI)

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    Chalcogenido-Bridged Clusters by Reactions of Chalcogenostannate Salts

    Zimmermann, Christian, Anson, Christopher, Dehnen, Stefanie
    Journal of Cluster Science, 2007, Vol.18(3), pp.618-629 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Chalcogenido-Bridged Clusters by Reactions of Chalcogenostannate Salts
    Author: Zimmermann, Christian; Anson, Christopher; Dehnen, Stefanie
    Subject: Chalcogenido-bridged clusters ; chalcogenostannates ; X-ray diffractometry
    Description: Reactions of [ en H] 4 [Sn 2 S 6 ] or K 6 [Sn 2 Te 6 ] with [Cp*CoCl] 2 (Cp* = C 5 Me 5 ), or [ en H] 4 [Sn 2 Se 6 ]· en ( en  = 1,2-diaminoethane) with [{CpFe(CO) 2 } 2 SnCl 2 ] leads to the formation of three chalcogenido-bridged transition metal complexes via an unusual synthesis route. [(Cp*Co) 3 ( μ 3 -S) 2 ] ( 1 ), [(Cp*Co) 3 ( μ 3 -Te) 2 ] ( 2 ), and [{CpFe(CO) 2 } 3 {CpFe(CO)}Sn 3 Se 4 ] ( 3 ) were structurally characterized by means of single-crystal X-ray diffractometry and represent previously unknown homologues of a selenium bridged analogue ( 1 or 2 ) or of Fe–S clusters ( 1 or 3 ). Compounds 1 and 2 , together with the previously reported Se analogue, show a progression from a symmetrical closo -trigonal-bipyramidal structure to the square-pyramidal structure predicted by the Wade-Mingos Rules for a 50 electron cluster.
    Is part of: Journal of Cluster Science, 2007, Vol.18(3), pp.618-629
    Identifier: 1040-7278 (ISSN); 1572-8862 (E-ISSN); 10.1007/s10876-007-0130-0 (DOI)

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    Antimycobacterial activity of mixed-ligand copper quinolone complexes

    Saha, Dilip, Padhye, Subhash, Anson, Christopher, Powell, Annie
    Transition Metal Chemistry, 2003, Vol.28(5), pp.579-584 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Antimycobacterial activity of mixed-ligand copper quinolone complexes
    Author: Saha, Dilip; Padhye, Subhash; Anson, Christopher; Powell, Annie
    Description: New mixed-ligand Cu II , complexes: [Cu(cf)(phen)Cl)](BF 4 ) · 4H 2 O (3) , [Cu(cf)(bipy)(Cl)](BF 4 ) · 2H 2 O (4) and [Cu(cf)(dafone)(Cl)](BF 4 ) · 2H 2 O (5) (cf = ciprofloxacin, phen = 1,10-phenanthroline, bipy = 2,2′-bipyridine and dafone = 4,5-diazafluoren-9-one) have been isolated and characterized by elemental analyses, i.r., u.v.–vis. spectra, magnetic susceptibility and cyclic voltammetry. Complex (4) crystallizes in the monoclinic space group P2 1 /n with a = 13.8919(13) Å, b = 14.5718(13) Å, c = 14.0725(13) Å, β = 95.150(2)°, V =2837.2(5) Å 3 . All complexes possess square-pyramidal geometry. The antimycobacterial activity of ciprofloxacin and complexes (3–5) has been evaluated against Mycobacterium smegmatis , which shows clear enhancement in the antitubercular activity upon copper complexation with N—N donors.
    Is part of: Transition Metal Chemistry, 2003, Vol.28(5), pp.579-584
    Identifier: 0340-4285 (ISSN); 1572-901X (E-ISSN); 10.1023/A (DOI)

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    Opening up a dysprosium triangle by ligand oximation

    Hewitt, Ian J, Lan, Yanhua, Anson, Christopher E, Luzon, Javier, Sessoli, Roberta, Powell, Annie K
    Chemical communications (Cambridge, England), 28 November 2009(44), pp.6765-7 [Peer Reviewed Journal]
    MEDLINE/PubMed (U.S. National Library of Medicine)
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    Title: Opening up a dysprosium triangle by ligand oximation
    Author: Hewitt, Ian J; Lan, Yanhua; Anson, Christopher E; Luzon, Javier; Sessoli, Roberta; Powell, Annie K
    Description: A simple trinuclear dysprosium complex shows complex slow relaxation of the magnetisation.
    Is part of: Chemical communications (Cambridge, England), 28 November 2009(44), pp.6765-7
    Identifier: 1364-548X (E-ISSN); 19885472 Version (PMID); 10.1039/b908194a (DOI)

    • Several versions

    Mechanism of magnetisation relaxation in {MIII2DyIII2} (M = Cr, Mn, Fe, Al) "Butterfly" complexes: how important are the transition metal ions here?

    Peng, Yan, Singh, Mukesh Kumar, Mereacre, Valeriu, Anson, Christopher E, Rajaraman, Gopalan, Powell, Annie K
    Chemical science, 07 June 2019, Vol.10(21), pp.5528-5538 [Peer Reviewed Journal]

    • Several versions

    The Influence of Halide Substituents on the Structural and Magnetic Properties of Fe 6 Dy 3 Rings

    Kühne, Irina A, Anson, Christopher E, Powell, Annie K
    Frontiers in Chemistry, 2020, Vol.8 [Peer Reviewed Journal]