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Dreiser, Jan, Ako, Ayuk M., Wäckerlin, Christian, Heidler, Jakoba, Anson, Christopher E., Powell, Annie K., Piamonteze, Cinthia, Nolting, Frithjof, Rusponi, Stefano, Brune, Harald
École Polytechnique Fédérale de Lausanne (EPFL)
Title: Reduction of Mn19 Coordination Clusters on a Gold Surface Author:Dreiser, Jan; Ako, Ayuk M.; Wäckerlin, Christian; Heidler, Jakoba; Anson, Christopher E.; Powell, Annie K.; Piamonteze, Cinthia; Nolting, Frithjof; Rusponi, Stefano; Brune, Harald Publisher:
Amer Chemical Soc (Washington)
The magnetic properties of a Mn-19 coordination cluster equipped with methylmercapto substituents on the organic ligands, [(Mn12Mn7II)-Mn-III(mu(4)-O)(8)(mu(3)-Cl)(7.7)(mu(3)-OMe)(0.3)(HLSMe)(12)(MeOH)(6)]Cl-2 center dot 27MeCN (Mn-19(SMe)) (H3LSMe = 2,6-bis(hydroxymethyl)-4-mercaptomethylphenol) deposited on Au(111) surfaces from solution, have been investigated by X-ray absorption spectroscopy and X-ray magnetic circular dichroism. The data reveal that in the submonolayer regime the molecules contain only divalent MnII in contrast to the presence of Mn-II and Mn-III ions in the powder sample. Brillouin function fits to the field-dependent magnetization suggest that the total spin ground state in the submonolayer is much lower than S-TOT = 83/2 of the pristine molecules. These findings suggest that significant changes of the electronic structure, molecular geometry, and intramolecular exchange coupling take place upon surface deposition. A sample with coverage of 2-3 monolayers shows the presence of Mn-III, suggesting that a decoupling layer could stabilize the Mn-19 core on a metallic surface.
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
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)
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)
0020-1669 (ISSN); 1520-510X (E-ISSN); 10.1021/ic900645d (DOI)
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