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    • Several versions

    Tuning of Hula-Hoop Coordination Geometry in a Dy Dimer

    Peng, Yan, Mereacre, Valeriu, Anson, Christopher, Powell, Annie
    Inorganics, 2016, Vol.4(1), p.2 [Peer Reviewed Journal]

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    Multiple superhyperfine fields in a {DyFe2Dy} coordination cluster revealed using bulk susceptibility and (57)Fe Mössbauer studies

    Peng, Yan, Mereacre, Valeriu, Anson, Christopher E, Powell, Annie K
    Physical chemistry chemical physics : PCCP, 03 August 2016, Vol.18(31), pp.21469-80 [Peer Reviewed Journal]
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    Title: Multiple superhyperfine fields in a {DyFe2Dy} coordination cluster revealed using bulk susceptibility and (57)Fe Mössbauer studies
    Author: Peng, Yan; Mereacre, Valeriu; Anson, Christopher E; Powell, Annie K
    Subject: Hyperfine Structure ; Physical Chemistry ; Magnetic Properties ; Clusters ; Mossbauer Effect ; Magnetic Permeability ; Mossbauer Spectroscopy ; Iron ; Miscellaneous Sciences (So) ; Chemical and Electrochemical Properties (MD) ; Chemical and Electrochemical Properties (Ep) ; Chemical and Electrochemical Properties (Ed) ; Chemical and Electrochemical Properties (EC);
    Description: A [DyFeDy(μ3-OH)2(pmide)2(p-Me-PhCO2)6] coordination cluster, where pmideH2 = N-(2-pyridylmethyl)iminodiethanol, has been synthesized and the magnetic properties studied. The dc magnetic measurements reveal dominant antiferromagnetic interactions between the metal centres. The ac measurements reveal zero-field quantum tunnelling of the magnetisation (QTM) which can be understood, but not adequately modelled, in terms of at least three relaxation processes when appropriate static (dc) fields are applied. To investigate this further, (57)Fe Mössbauer spectroscopy was used and well-resolved nuclear hyperfine structures could be observed, showing that on the Mössbauer time scale, without applied field or else with very small applied fields, the iron nuclei experience three or more superhyperfine fields arising from the slow magnetisation reversal of the strongly polarized fields of the Dy(III) ions.
    Is part of: Physical chemistry chemical physics : PCCP, 03 August 2016, Vol.18(31), pp.21469-80
    Identifier: 1463-9084 (E-ISSN); 27424877 Version (PMID); 10.1039/c6cp02942f (DOI)

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    Magnetic anisotropy of a Co single ion magnet with distorted trigonal prismatic coordination: theory and experiment

    Peng, Yan, Bodenstein, Tilmann, Fink, Karin, Mereacre, Valeriu, Anson, Christopher E, Powell, Annie K
    Physical chemistry chemical physics : PCCP, 02 November 2016, Vol.18(43), pp.30135-30143 [Peer Reviewed Journal]
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    Title: Magnetic anisotropy of a Co single ion magnet with distorted trigonal prismatic coordination: theory and experiment
    Author: Peng, Yan; Bodenstein, Tilmann; Fink, Karin; Mereacre, Valeriu; Anson, Christopher E; Powell, Annie K
    Subject: Chemistry;
    Description: The single ion magnetic properties of Co(ii) are affected by the details of the coordination geometry of the ion. Here we show that a geometry close to trigonal prismatic which arises when the ligand 6,6'-((1Z)-((piperazine-1,4-diylbis(propane-3,1-diyl))bis(azanylylidene))bis(methanylylidene))bis(2-methoxyphenol) coordinates to Co(ii) does indeed lead to enhanced single-ion behaviour as has previously been predicted. Synthesis of the compound, structural information, and static as well as dynamic magnetic data are presented along with an analysis using quantum chemical ab initio calculations. Though the complex shows a slight deviation from an ideal trigonal prismatic coordination, the zero-field splitting as well as the g-tensor are strongly axial with D = -41 cm and E < 0.01 cm. For the lowest Kramers doublet (S = 1/2) g = 7.86 and g < 0.05 were found. In contrast, the second Kramers doublet possesses a rhombic g-tensor with g = 2.75 and g = 4.35. Due to large spin-orbit coupling resulting...
    Is part of: Physical chemistry chemical physics : PCCP, 02 November 2016, Vol.18(43), pp.30135-30143
    Identifier: 1463-9084 (E-ISSN); 27777991 Version (PMID)

    • Several versions

    Butterfly M2 IIIEr2 (MIII = Fe and Al) SMMs: Synthesis, Characterization, and Magnetic Properties

    Peng, Yan, Mereacre, Valeriu, Anson, Christopher E, Powell, Annie K
    ACS omega, 30 June 2018, Vol.3(6), pp.6360-6368

    • 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]

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    Synthesis, Characterization, Electrochemistry, Photoluminescence and Magnetic Properties of a Dinuclear Erbium(III)-Containing Monolacunary Dawson-Type Tungstophosphate: {Er(HO)(CHCOO)(PWO)}

    Ibrahim, Masooma, Baksi, Ananya, Peng, Yan, Al-Zeidaneen, Firas Khalil, Mbomekallé, Israël M, De Oliveira, Pedro, Anson, Christopher E
    Molecules (Basel, Switzerland), 15 September 2020, Vol.25(18) [Peer Reviewed Journal]

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    Syntheses, Crystal Structure, Electrocatalytic, and Magnetic Properties of the Monolanthanide-Containing Germanotungstates [Ln(H2O) n GeW11O39]5– (Ln = Dy, Er, n = 4,3)

    Ibrahim, Masooma, Mbomekallé, Israël M, de Oliveira, Pedro, Baksi, Ananya, Carter, Anthony B, Peng, Yan, Bergfeldt, Thomas, Malik, Sharali, Anson, Christopher E
    ACS omega, 24 December 2019, Vol.4(26), pp.21873-21882

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    Influence of ligand substitution on magnetic hyperfine interaction in Dy 6 -based single-molecule magnets/toroics

    Scherthan, Lena, Ruppert, Thomas, Peng, Yan, Baniodeh, Amer, Auerbach, Hendrik, Hochdörffer, Tim, Wolny, Juliusz, Bi, Wenli, Zhao, Jiyong, Hu, Michael, Toellner, Thomas, Alp, E., Brown, Dennis, Anson, Christopher, Powell, Annie, Schünemann, Volker
    Hyperfine Interactions, 2019, Vol.240(1), pp.1-6 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Influence of ligand substitution on magnetic hyperfine interaction in Dy 6 -based single-molecule magnets/toroics
    Author: Scherthan, Lena; Ruppert, Thomas; Peng, Yan; Baniodeh, Amer; Auerbach, Hendrik; Hochdörffer, Tim; Wolny, Juliusz; Bi, Wenli; Zhao, Jiyong; Hu, Michael; Toellner, Thomas; Alp, E.; Brown, Dennis; Anson, Christopher; Powell, Annie; Schünemann, Volker
    Subject: Time-domain Mössbauer spectroscopy/nuclear forward scattering ; Dysprosium ; Magnetic hyperfine field ; Single-molecule magnets
    Description: 161 Dy time-domain synchrotron Mössbauer spectroscopy (SMS), just recently presented as a novel tool to investigate Dy(III)-based single-molecule magnets (SMMs), has now been applied on two polynuclear Dy 6 -based wheel compounds possessing special features of single-molecule toroics (SMTs). The magnitude of the magnetic hyperfine field revealed for the Dy 6 ring system [Dy 6 (teaH) 6 (NO 3 ) 6 ]·8MeOH is with B 0  = 574.3(5) T characteristic for Dy(III) with a 6 H 15/2 ground state. The ligand substituted compound [Dy 6 (Me-teaH) 6 (NO 3 ) 6 ]·6MeCN possesses within the experimental errors the same magnetic hyperfine characteristics ( B 0  = 574.9(5) T). Consequently, the herein studied organic ligand variation has no perceptible influence on the magnetic hyperfine field sensed by the 161 Dy(III) nuclei in these particular homometallic Dy(III) 6 -wheels.
    Is part of: Hyperfine Interactions, 2019, Vol.240(1), pp.1-6
    Identifier: 0304-3843 (ISSN); 1572-9540 (E-ISSN); 10.1007/s10751-019-1669-5 (DOI)