Twists to the spin structure of the Ln9-diabolo motif exemplified in two {Zn2Ln2}[Ln9]{Zn2} coordination clusters

Griffiths, Kieran, Kühne, Irina A, Tizzard, Graham J, Coles, Simon J, Kostakis, George E and Powell, Annie K (2019) Twists to the spin structure of the Ln9-diabolo motif exemplified in two {Zn2Ln2}[Ln9]{Zn2} coordination clusters. Inorganic Chemistry, 58 (4). pp. 2483-2490. ISSN 0020-1669

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Abstract

Two pentadecanuclear Zn4Ln11 [with Ln = Gd(1) or Dy(2)] coordination clusters, best formulated as {Zn2Ln2}[Ln9]{Zn2}, are presented. The central {Ln9} diabolo core has a {Zn2Ln2} handle motif pulling at two outer Ln ions of the central core via two {ZnLn} units, which also invest the system with C2 point symmetry. The resulting cluster motif is supported on two Zn “feet”, corresponding to the {Zn2} unit in the formula. A thorough investigation of the magnetic properties in the light of the properties of previously reported {Ln9} diabolo compounds was undertaken. Up to now, the spin structure of such diabolo motifs usually proves ambiguous. Our magnetic studies show that the orientation of the central spin in the {Gd9} diabolo plays a decisive role. In stabilizing the core by attachment of the {Zn}2+ “feet” and using the C2 symmetry related {ZnGd}5+ handles to influence the spin direction of the central Gd of the {Gd9} diabolo we can understand why the “naked” {Gd9} diabolo shows ambiguous spin structure. This then allowed us to elucidate the single molecule magnetic (SMM) properties of the Dy based compound 2 through disentangling the magnetic properties of the isostructural Gd based compound 1.

Item Type: Article
Schools and Departments: School of Life Sciences > Biochemistry
School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Georgios Kostakis
Date Deposited: 16 Jan 2019 11:49
Last Modified: 09 Apr 2019 10:04
URI: http://sro.sussex.ac.uk/id/eprint/81311

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Project NameSussex Project NumberFunderFunder Ref
Defect dicubane 3d/Dy(III) Coordination Clusters: Heading for materials displaying catalytic propertiesG1632EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/M023834/1