Inorganic Approach to Stabilizing Nanoscale Toroidicity in a Tetraicosanuclear Fe18Dy6 Single Molecule Magnet

Hagen Kaemmerer; Amer Baniodeh; Yan Peng; Eufemio Moreno-Pineda; Michael Schulze; Christopher E Anson; Wolfgang Wernsdorfer; Jürgen Schnack; Annie K Powell

doi:10.1021/jacs.0c07168

Inorganic Approach to Stabilizing Nanoscale Toroidicity in a Tetraicosanuclear Fe₁₈Dy₆ Single Molecule Magnet

J Am Chem Soc. 2020 Sep 2;142(35):14838-14842. doi: 10.1021/jacs.0c07168. Epub 2020 Aug 20.

Authors

Hagen Kaemmerer¹, Amer Baniodeh^{1

2}, Yan Peng^{1

2}, Eufemio Moreno-Pineda^{2

3}, Michael Schulze^{2

4}, Christopher E Anson¹, Wolfgang Wernsdorfer^{2

4

5}, Jürgen Schnack⁶, Annie K Powell^{1

2

5}

Affiliations

¹ Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
² Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
³ Depto. de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá, Panamá.
⁴ Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany.
⁵ Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
⁶ Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany.

PMID: 32786752
DOI: 10.1021/jacs.0c07168

Abstract

Cyclic coordination clusters (CCCs) are proving to provide an extra dimension in terms of exotic magnetic behavior as a result of their finite but cyclized chain structures. The Fe₁₈Dy₆ CCC is a Single Molecule Magnet with the highest nuclearity among Ln containing clusters. The three isostructural compounds [Fe₁₈Ln₆(μ-OH)₆(ampd)₁₂(Hampd)₁₂(PhCO₂)₂₄](NO₃)₆·38MeCN for Ln = Dy^III (1), Lu^III (2), or Y^III (3), where H₂ampd = 2-amino-2-methyl-1,3-propanediol, are reported. These can be described in terms of the cyclization of six {Fe₃Ln(μOH)(ampd)₂(Hampd)₂(PhCO₂)₄}⁺ units with six nitrate counterions to give the neutral cluster. The overall structure consists of two giant Dy₃ triangles sandwiching a strongly antiferromagnetically coupled Fe₁₈ ring, leading to a toroidal arrangement of the anisotropy axis of the Dy ions, making this the biggest toroidal arrangement on a molecular level known so far.