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Spin relaxation in antiferromagnetic Fe–Fe dimers slowed down by anisotropic Dy III ions

Mereacre, Valeriu, Klöwer, Frederik, Lan, Yanhua, Clérac, Rodolphe, Wolny, Juliusz A, Schünemann, Volker, Anson, Christopher E, Powell, Annie K
Beilstein Journal of Nanotechnology, 2013, Vol.4, p.807-814 [Peer Reviewed Journal]

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Evidence of slow relaxation of magnetization in dysprosium-based ionic liquids

Prodius, Denis, Macaev, Fliur, Lan, Yanhua, Novitchi, Ghenadie, Pogrebnoi, Serghei, Stingaci, Eugenia, Mereacre, Valeriu, Anson, Christopher E, Powell, Annie K
Chemical communications (Cambridge, England), 14 October 2013, Vol.49(80), pp.9215-7 [Peer Reviewed Journal]
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Title: Evidence of slow relaxation of magnetization in dysprosium-based ionic liquids
Author: Prodius, Denis; Macaev, Fliur; Lan, Yanhua; Novitchi, Ghenadie; Pogrebnoi, Serghei; Stingaci, Eugenia; Mereacre, Valeriu; Anson, Christopher E; Powell, Annie K
Subject: Magnetization ; Dysprosium ; Ionic Liquids ; Miscellaneous Sciences (So) ; Components and Materials (General) (Ea);
Description: Dysprosium based ionic liquids displaying slow relaxation of magnetization at low temperatures are reported.
Is part of: Chemical communications (Cambridge, England), 14 October 2013, Vol.49(80), pp.9215-7
Identifier: 1364-548X (E-ISSN); 23995749 Version (PMID); 10.1039/c3cc45554h (DOI)

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Catalytic "triangles": binding of iron in task-specific ionic liquids

Prodius, Denis, Macaev, Fliur, Stingaci, Eugenia, Pogrebnoi, Vsevolod, Mereacre, Valeriu, Novitchi, Ghenadie, Kostakis, George E, Anson, Christopher E, Powell, Annie K
Chemical communications (Cambridge, England), 07 March 2013, Vol.49(19), pp.1915-7 [Peer Reviewed Journal]
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Title: Catalytic "triangles": binding of iron in task-specific ionic liquids
Author: Prodius, Denis; Macaev, Fliur; Stingaci, Eugenia; Pogrebnoi, Vsevolod; Mereacre, Valeriu; Novitchi, Ghenadie; Kostakis, George E; Anson, Christopher E; Powell, Annie K
Subject: Binding ; Catalysis ; Catalysts ; Charging ; Condensing ; Ionic Liquids ; Iron ; Triangles ; Miscellaneous Sciences (So) ; Components and Materials (General) (Ea);
Description: A new class of task-specific ionic liquids (ILs) which contain septuply positively charged {Fe(3)(III)O(RCOO)(6)L(3)}(7+) triangles has been synthesized and structurally characterized. Such metal-containing ILs can be repeatedly used as alternative catalysts in the synthesis of 2-pyrrolo-3'-yloxindole or the condensation of indoles with various aldehydes.
Is part of: Chemical communications (Cambridge, England), 07 March 2013, Vol.49(19), pp.1915-7
Identifier: 1364-548X (E-ISSN); 23361098 Version (PMID); 10.1039/c2cc36741f (DOI)

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Ab initio study of the magnetic exchange coupling constants of a structural model CaMn(3)(III)Mn(II) of the oxygen evolving center in photosystem II

Fliegl, Heike, Fink, Karin, Klopper, Wim, Anson, Christopher E, Powell, Annie K, Clérac, Rodolphe
Physical chemistry chemical physics : PCCP, 28 May 2009, Vol.11(20), pp.3900-9 [Peer Reviewed Journal]
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Title: Ab initio study of the magnetic exchange coupling constants of a structural model CaMn(3)(III)Mn(II) of the oxygen evolving center in photosystem II
Author: Fliegl, Heike; Fink, Karin; Klopper, Wim; Anson, Christopher E; Powell, Annie K; Clérac, Rodolphe
Subject: Magnetics ; Models, Molecular ; Quantum Theory ; Manganese -- Chemistry ; Oxygen -- Chemistry ; Photosystem II Protein Complex -- Chemistry
Description: A new structural model for the oxygen evolving center in photosystem II was recently synthesized and characterized by Hewitt et al. (Chem. Commun., 2006, 2650). A simplified Heisenberg model Hamiltonian with only two independent constants was applied to extract the magnetic spin-coupling constants J(ij) of the mixed valent Mn(4) system. In the present study, all six possible coupling constants are calculated by ab initio methods in order to obtain a detailed understanding of the magnetic behavior of the system. The broken symmetry approach of Noodleman is applied using density functional theory (DFT). Two different approaches are compared. On the one hand, the coupling constants are obtained from calculations on eight different determinants which describe the high-spin state as well as different broken-symmetry states of the tetranuclear cluster. On the other hand, a pair approach that permits a direct calculation of the individual coupling constants is used. For the pair approach, the...
Is part of: Physical chemistry chemical physics : PCCP, 28 May 2009, Vol.11(20), pp.3900-9
Identifier: 1463-9076 (ISSN); 19440618 Version (PMID); 10.1039/b819444k (DOI)

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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]

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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]
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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]
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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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Concentric Archimedean polyhedra: Mn(III)12Mn(II)9 aggregates linked into a cubic network

Nayak, Sanjit, Lan, Yanhua, Clérac, Rodolphe, Anson, Christopher E, Powell, Annie K
Chemical communications (Cambridge, England), 30 November 2008(44), pp.5698-700 [Peer Reviewed Journal]
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Title: Concentric Archimedean polyhedra: Mn(III)12Mn(II)9 aggregates linked into a cubic network
Author: Nayak, Sanjit; Lan, Yanhua; Clérac, Rodolphe; Anson, Christopher E; Powell, Annie K
Subject: Chemical Sciences ; Material Chemistry ; Chemical Sciences ; Inorganic Chemistry ; Chimie de Coordination ; Magnetisme ; Chemistry;
Description: A Mn(III)(12)Mn(II)(9) aggregate has a structure built up of concentric polyhedra with these units linked into a cubic network to give a remarkably pleasing structure isotypic with iron pyrites.
Is part of: Chemical communications (Cambridge, England), 30 November 2008(44), pp.5698-700
Identifier: 1364-548X (E-ISSN); 19009052 Version (PMID); 10.1039/b811370j (DOI)

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Spin Chirality in a Molecular Dysprosium Triangle: the Archetype of the Non-Collinear Ising Model

Luzon, Javier, Bernot, Kevin, Hewitt, Ian, Anson, Christopher, Powell, Annie, Sessoli, Roberta
arXiv.org, Apr 8, 2008 [Peer Reviewed Journal]

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Correction to: A Single-Molecule Magnet Tetranuclear [Mn 3 III Mn IV O 3 Cl] Complex with Bis(diisopropylphosphinyl)imide Ligands

Cheung, Wai-Man, Zhang, Qian-Feng, Clérac, Rodolphe, Hewitt, Ian J, Anson, Christopher E, Powell, Annie K, Wernsdorfer, Wolfgang, Williams, Ian D, Leung, Wa-Hung
Journal of cluster science, 2020, Vol.31(1), p.293–300 [Peer Reviewed Journal]

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Spin relaxation in antiferromagnetic Fe–Fe dimers slowed down by anisotropic Dy III ions

Evidence of slow relaxation of magnetization in dysprosium-based ionic liquids

Catalytic "triangles": binding of iron in task-specific ionic liquids

Ab initio study of the magnetic exchange coupling constants of a structural model CaMn(3)(III)Mn(II) of the oxygen evolving center in photosystem II

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

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

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

Concentric Archimedean polyhedra: Mn(III)12Mn(II)9 aggregates linked into a cubic network

Spin Chirality in a Molecular Dysprosium Triangle: the Archetype of the Non-Collinear Ising Model

Correction to: A Single-Molecule Magnet Tetranuclear [Mn 3 III Mn IV O 3 Cl] Complex with Bis(diisopropylphosphinyl)imide Ligands